# How do I record buying inventory and turning it into cost of goods sold when it sells?

- **[United States · companies that hold inventory (retailers, distributors, manufacturers)]** The sale of an inventory item is the event on which that item’s cost is removed from inventory and reported on the income statement as cost of goods sold. → [CG-MCE-085#S02](#s-CG-MCE-085-S02)
- **[United States · retailers using the perpetual inventory system]** Under the perpetual inventory system the Inventory account changes constantly: a retailer debits Inventory for the cost when it purchases merchandise (whereas under the periodic system Purchases was debited), and on sale Inventory is credited and Cost of Goods Sold is debited for the cost of the goods sold. → [CG-MCE-085#S05](#s-CG-MCE-085-S05)
- **[United States · companies using the perpetual inventory system]** Under the perpetual system two entries are recorded when merchandise is sold: the sale amount is debited to Accounts Receivable or Cash and credited to Sales, and the cost of the merchandise sold is debited to Cost of Goods Sold and credited to Inventory; under the periodic system the second entry is not made. → [CG-MCE-085#S06](#s-CG-MCE-085-S06)
- **[United States (US-published introductory financial accounting textbook; the text names no other jurisdiction) · merchandising company using a periodic inventory system (illustrated by the retailer California Business Solutions)]** Under the periodic inventory system, and unlike the perpetual system, a sale produces no entry for the cost of the sale at the time of sale; that cost recognition instead occurs at the end of the period through an adjustment to Cost of Goods Sold. → [CG-MCE-085#S18](#s-CG-MCE-085-S18)
- **[United States · companies using the periodic inventory system]** Under the periodic system, cost of goods sold reported on the income statement is computed by taking the cost of goods available for sale and subtracting the cost of the ending inventory. → [CG-MCE-085#S23](#s-CG-MCE-085-S23)

## What this page establishes

- Why the cost waits on the balance sheet and moves to cost of goods sold at the sale — Established (Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference.)
- Which acquisition costs are included in the recorded cost of inventory — Not established (Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference.)
- How each mechanism produces the cost of goods sold figure — Partly established (Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference.)
- System setup that automatic cost relief depends on, and what stays manual — Not established
- Goods you buy to resell are an asset until they sell — Established (Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference.)
- What the inventory balance is supposed to contain — Not established (Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference.)
- The two ways the cost reaches cost of goods sold: with each sale, or at period end — Partly established (Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference.)
- The entries: buying the goods, paying for them, and relieving the cost when they sell — Established (Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference.)
- What must be set up before your accounting system relieves cost on its own — Not established
- Checking it worked: tying the inventory movement to purchases and cost of goods sold — Not established (Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference.)

## Goods you buy to resell are an asset until they sell
<a id="need-CG-MCE-085-P1"></a>

- <a id="s-CG-MCE-085-S01"></a>Inventory is recorded and reported on the company’s balance sheet at its cost. _(jurisdiction: United States, entity_scope: companies that hold inventory (retailers, distributors, manufacturers))_ `CG-MCE-085#S01`
  > “Inventory is recorded and reported on a company’s balance sheet at its cost.” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); Introduction, paragraph 1. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S02"></a>The sale of an inventory item is the event on which that item’s cost is removed from inventory and reported on the income statement as cost of goods sold. _(jurisdiction: United States, entity_scope: companies that hold inventory (retailers, distributors, manufacturers))_ `CG-MCE-085#S02`
  > “When an inventory item is sold, the item’s cost is removed from inventory and the cost is reported on the company’s income statement as the cost of goods sold .” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); Introduction, paragraph 2. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S03"></a>Expenses are costs matched with revenues on the income statement — Cost of Goods Sold being an expense caused by Sales — and under the accrual basis of accounting that matching is not based on the date the expenses are paid. _(jurisdiction: United States, entity_scope: companies that hold inventory (retailers, distributors, manufacturers), accounting_basis: accrual)_ `CG-MCE-085#S03`
  > “Costs that are matched with revenues on the income statement. For example, Cost of Goods Sold is an expense caused by Sales. Insurance Expense, Wages Expense, Advertising Expense, Interest Expense are expenses matched with the period of time in the heading of the income statement. Under the accrual basis of accounting, the matching is NOT based on the date that the expenses are paid.” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); Unlabeled term-definition (glossary) block following the “Earn Our Certificate for This Topic” panel — definition of “expenses”. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S04"></a>Recording inventory on a cost basis ordinarily achieves the objective of properly matching costs with revenues, cost being the amount chargeable against the revenues of future periods; however, in certain circumstances cost may not be the amount properly so chargeable. _(jurisdiction: United States, entity_scope: Nongovernmental entities applying U.S. GAAP that hold inventory, accounting_basis: U.S. GAAP (FASB Accounting Standards Codification), effective_from: Public business entities: fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. All other entities: fiscal years beginning after December 15, 2016, and interim periods within fiscal years beginning after December 15, 2017. Earlier application permitted as of the beginning of an interim or annual reporting period.)_ `CG-MCE-085#S04`
  > “The cost basis of recording inventory ordinarily achieves the objective
of a proper matching of costs and revenues. However, under certain
circumstances cost may not be the amount properly chargeable against the
revenues of future periods.” — [Financial Accounting Standards Board (Financial Accounting Foundation) — Accounting Standards Update No. 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory](https://storage.fasb.org/ASU%202015-11.pdf), 2015-07-22; Amendments to Subtopic 330-10, paragraph 3 - paragraph 330-10-35-2, page 5. Verified 2026-09-09.

_Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference._

## Why the cost waits on the balance sheet and moves to cost of goods sold at the sale
<a id="need-CG-MCE-085-C1"></a>

- See above: Inventory is recorded and reported on the company’s balance sheet at its cost. ([CG-MCE-085#S01](#s-CG-MCE-085-S01))

- See above: The sale of an inventory item is the event on which that item’s cost is removed from inventory and reported on the income statement as cost of goods sold. ([CG-MCE-085#S02](#s-CG-MCE-085-S02))

- See above: Expenses are costs matched with revenues on the income statement — Cost of Goods Sold being an expense caused by Sales — and under the accrual basis of accounting that matching is not based on the date the expenses are paid. ([CG-MCE-085#S03](#s-CG-MCE-085-S03))

- See above: Recording inventory on a cost basis ordinarily achieves the objective of properly matching costs with revenues, cost being the amount chargeable against the revenues of future periods; however, in certain circumstances cost may not be the amount properly so chargeable. ([CG-MCE-085#S04](#s-CG-MCE-085-S04))

- <a id="s-CG-MCE-085-S05"></a>Under the perpetual inventory system the Inventory account changes constantly: a retailer debits Inventory for the cost when it purchases merchandise (whereas under the periodic system Purchases was debited), and on sale Inventory is credited and Cost of Goods Sold is debited for the cost of the goods sold. _(jurisdiction: United States, entity_scope: retailers using the perpetual inventory system)_ `CG-MCE-085#S05`
  > “When using the perpetual inventory system, the general ledger account Inventory is constantly (or perpetually) changing. For example, when a retailer purchases merchandise, the retailer debits its Inventory account for the cost. (Under the periodic system, the account Purchases was debited.) When the retailer sells the merchandise, the Inventory account is credited and the Cost of Goods Sold account is debited for the cost of the goods sold.” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); “Perpetual FIFO”, paragraph 1. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S06"></a>Under the perpetual system two entries are recorded when merchandise is sold: the sale amount is debited to Accounts Receivable or Cash and credited to Sales, and the cost of the merchandise sold is debited to Cost of Goods Sold and credited to Inventory; under the periodic system the second entry is not made. _(jurisdiction: United States, entity_scope: companies using the perpetual inventory system)_ `CG-MCE-085#S06`
  > “Under the perpetual system, two entries are recorded when merchandise is sold: (1) the amount of the sale is debited to Accounts Receivable or Cash and is credited to Sales, and (2) the cost of the merchandise sold is debited to the account Cost of Goods Sold and is credited to Inventory. (Note: Under the periodic system the second entry is not made.)” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); “Perpetual FIFO”, paragraph 2. Verified 2026-09-09.

_Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference._

## The entries: buying the goods, paying for them, and relieving the cost when they sell
<a id="need-CG-MCE-085-P4"></a>

- See above: Under the perpetual inventory system the Inventory account changes constantly: a retailer debits Inventory for the cost when it purchases merchandise (whereas under the periodic system Purchases was debited), and on sale Inventory is credited and Cost of Goods Sold is debited for the cost of the goods sold. ([CG-MCE-085#S05](#s-CG-MCE-085-S05))

- See above: Under the perpetual system two entries are recorded when merchandise is sold: the sale amount is debited to Accounts Receivable or Cash and credited to Sales, and the cost of the merchandise sold is debited to Cost of Goods Sold and credited to Inventory; under the periodic system the second entry is not made. ([CG-MCE-085#S06](#s-CG-MCE-085-S06))

- <a id="s-CG-MCE-085-S07"></a>In the worked example, the purchase of merchandise paid for immediately with cash is recorded by debiting the Merchandise Inventory account for the item purchased (Merchandise Inventory-Packages) for the total cost of 6,200 ($620 × 10) and crediting Cash, because the company paid with cash. _(jurisdiction: United States, entity_scope: Illustrative retailer (California Business Solutions) in the textbook's worked example, conditions: perpetual inventory system; merchandise purchased and paid for immediately in cash)_ `CG-MCE-085#S07`
  > “Merchandise Inventory-Packages increases (debit) for 6,200 ($620 × 10), and Cash decreases (credit) because the company paid with cash.” — [OpenStax, Rice University — Principles of Accounting, Volume 1: Financial Accounting - 6.3 Analyze and Record Transactions for Merchandise Purchases Using the Perpetual Inventory System](https://openstax.org/books/principles-financial-accounting/pages/6-3-analyze-and-record-transactions-for-merchandise-purchases-using-the-perpetual-inventory-system), 2026-04-23; Section 6.3 Analyze and Record Transactions for Merchandise Purchases Using the Perpetual Inventory System > Cash and Credit Purchase Transaction Journal Entries > analysis of the April 1 cash purchase entry. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S08"></a>In the worked example, a purchase of merchandise on credit is recorded by debiting the Merchandise Inventory account specific to the item purchased for the value of the goods ($12,000 = $400 × 30) and crediting Accounts Payable, because the goods were purchased on credit. _(jurisdiction: United States, entity_scope: Illustrative retailer (California Business Solutions) in the textbook's worked example, conditions: perpetual inventory system; merchandise purchased on credit; credit terms n/15)_ `CG-MCE-085#S08`
  > “Merchandise Inventory is specific to desktop computers and is increased (debited) for the value of the computers by $12,000 ($400 × 30). Since the computers were purchased on credit by CBS, Accounts Payable increases (credit).” — [OpenStax, Rice University — Principles of Accounting, Volume 1: Financial Accounting - 6.3 Analyze and Record Transactions for Merchandise Purchases Using the Perpetual Inventory System](https://openstax.org/books/principles-financial-accounting/pages/6-3-analyze-and-record-transactions-for-merchandise-purchases-using-the-perpetual-inventory-system), 2026-04-23; Section 6.3 Analyze and Record Transactions for Merchandise Purchases Using the Perpetual Inventory System > Cash and Credit Purchase Transaction Journal Entries > analysis of the April 7 credit purchase entry. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S09"></a>In the worked example, payment of the amount due on a credit purchase whose terms were n/15 (net due in 15 days) and where no discount was offered is recorded by debiting Accounts Payable and crediting Cash for the full amount owed. _(jurisdiction: United States, entity_scope: Illustrative retailer (California Business Solutions) in the textbook's worked example, conditions: perpetual inventory system; credit terms n/15; no discount offered on the transaction)_ `CG-MCE-085#S09`
  > “Accounts Payable decreases (debit), and Cash decreases (credit) for the full amount owed. The credit terms were n/15, which is net due in 15 days. No discount was offered with this transaction.” — [OpenStax, Rice University — Principles of Accounting, Volume 1: Financial Accounting - 6.3 Analyze and Record Transactions for Merchandise Purchases Using the Perpetual Inventory System](https://openstax.org/books/principles-financial-accounting/pages/6-3-analyze-and-record-transactions-for-merchandise-purchases-using-the-perpetual-inventory-system), 2026-04-23; Section 6.3 Analyze and Record Transactions for Merchandise Purchases Using the Perpetual Inventory System > Cash and Credit Purchase Transaction Journal Entries > analysis of the April 17 payment entry. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S10"></a>In the illustrated July 1 cash sale, the first (revenue-side) entry debits Cash and credits Sales for the selling price of the packages, $12,000 ($1,200 × 10). _(jurisdiction: United States, entity_scope: merchandising (retail) companies selling inventory, illustrated by the hypothetical retailer California Business Solutions (CBS), conditions: entries are illustrated under a perpetual inventory system; sale of merchandise for immediate cash payment)_ `CG-MCE-085#S10`
  > “In the first entry, Cash increases (debit) and Sales increases (credit) for the selling price of the packages, $12,000 ($1,200 × 10).” — [OpenStax, Rice University — Principles of Accounting, Volume 1: Financial Accounting - 6.4 Analyze and Record Transactions for the Sale of Merchandise Using the Perpetual Inventory System](https://openstax.org/books/principles-financial-accounting/pages/6-4-analyze-and-record-transactions-for-the-sale-of-merchandise-using-the-perpetual-inventory-system), 2026-04-23; §6.4 — heading “Cash and Credit Sales Transaction Journal Entries”, paragraph explaining the July 1 cash sale entries, sentence 1. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S11"></a>Because the computers were purchased on credit by the customer, the revenue-side entry for the illustrated July 7 sale debits Accounts Receivable and credits Sales for the selling price of the computers, $15,000 ($750 × 20). _(jurisdiction: United States, entity_scope: merchandising (retail) companies selling inventory, illustrated by the hypothetical retailer California Business Solutions (CBS), conditions: entries are illustrated under a perpetual inventory system; sale of merchandise on credit)_ `CG-MCE-085#S11`
  > “Since the computers were purchased on credit by the customer, Accounts Receivable increases (debit) and Sales increases (credit) for the selling price of the computers, $15,000 ($750 × 20).” — [OpenStax, Rice University — Principles of Accounting, Volume 1: Financial Accounting - 6.4 Analyze and Record Transactions for the Sale of Merchandise Using the Perpetual Inventory System](https://openstax.org/books/principles-financial-accounting/pages/6-4-analyze-and-record-transactions-for-the-sale-of-merchandise-using-the-perpetual-inventory-system), 2026-04-23; §6.4 — heading “Cash and Credit Sales Transaction Journal Entries”, paragraph explaining the July 7 credit sale entries, sentence 1. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S12"></a>In the illustrated July 1 cash sale, the cost of the sale is recognized in a second entry, which debits COGS and credits Merchandise Inventory-Packages for the cost of the packages, $6,200 ($620 × 10) — the cost side being recorded separately from the revenue side. _(jurisdiction: United States, entity_scope: merchandising (retail) companies selling inventory, illustrated by the hypothetical retailer California Business Solutions (CBS), conditions: entries are illustrated under a perpetual inventory system; sale of merchandise for immediate cash payment)_ `CG-MCE-085#S12`
  > “In the second entry, the cost of the sale is recognized. COGS increases (debit) and Merchandise Inventory-Packages decreases (credit) for the cost of the packages, $6,200 ($620 × 10).” — [OpenStax, Rice University — Principles of Accounting, Volume 1: Financial Accounting - 6.4 Analyze and Record Transactions for the Sale of Merchandise Using the Perpetual Inventory System](https://openstax.org/books/principles-financial-accounting/pages/6-4-analyze-and-record-transactions-for-the-sale-of-merchandise-using-the-perpetual-inventory-system), 2026-04-23; §6.4 — heading “Cash and Credit Sales Transaction Journal Entries”, paragraph explaining the July 1 cash sale entries, sentences 2–3. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S13"></a>Sales is a revenue account reporting the sales of merchandise, and sales are reported in the accounting period in which title to the merchandise was transferred from the seller to the buyer. _(jurisdiction: United States, entity_scope: companies that hold inventory (retailers, distributors, manufacturers))_ `CG-MCE-085#S13`
  > “A revenue account that reports the sales of merchandise. Sales are reported in the accounting period in which title to the merchandise was transferred from the seller to the buyer.” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); Unlabeled term-definition (glossary) block following the “Earn Our Certificate for This Topic” panel — definition of “Sales”. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S14"></a>Under a periodic system, merchandise bought in is recorded to a Purchases account instead of to Merchandise Inventory. _(jurisdiction: United States (US-published introductory financial accounting textbook; the text names no other jurisdiction), entity_scope: merchandising company using a periodic inventory system, conditions: periodic inventory system)_ `CG-MCE-085#S14`
  > “Under a periodic system, Purchases is used instead of Merchandise Inventory.” — [OpenStax, Rice University — Principles of Accounting, Volume 1: Financial Accounting - 6.7 Appendix: Analyze and Record Transactions for Merchandise Purchases and Sales Using the Periodic Inventory System](https://openstax.org/books/principles-financial-accounting/pages/6-7-appendix-analyze-and-record-transactions-for-merchandise-purchases-and-sales-using-the-periodic-inventory-system), 2026-04-23; Merchandise Purchases > Basic Analysis of Purchase Transaction Journal Entries > Cash and Credit Purchase Transaction Journal Entries - narrative on the April 1 cash purchase. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S15"></a>In the illustrated cash purchase under the periodic system, the Purchases account for the item bought is debited for the purchase cost ($6,200) and Cash is credited for the same amount because the company paid in cash. _(jurisdiction: United States (US-published introductory financial accounting textbook; the text names no other jurisdiction), entity_scope: illustrative retailer California Business Solutions, conditions: periodic inventory system; purchase paid immediately in cash; worked example, amounts specific to the illustration)_ `CG-MCE-085#S15`
  > “Purchases-Packages increases (debit) by $6,200 ($620 × 10), and Cash decreases (credit) by the same amount because the company paid with cash.” — [OpenStax, Rice University — Principles of Accounting, Volume 1: Financial Accounting - 6.7 Appendix: Analyze and Record Transactions for Merchandise Purchases and Sales Using the Periodic Inventory System](https://openstax.org/books/principles-financial-accounting/pages/6-7-appendix-analyze-and-record-transactions-for-merchandise-purchases-and-sales-using-the-periodic-inventory-system), 2026-04-23; Merchandise Purchases > Basic Analysis of Purchase Transaction Journal Entries > Cash and Credit Purchase Transaction Journal Entries - April 1 purchase of 10 hardware packages. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S16"></a>In the illustrated credit purchase under the periodic system, the Purchases account for the item is debited for the value of the goods ($12,000) and, because the goods were bought on credit, Accounts Payable is credited instead of cash. _(jurisdiction: United States (US-published introductory financial accounting textbook; the text names no other jurisdiction), entity_scope: illustrative retailer California Business Solutions, conditions: periodic inventory system; purchase made on credit, terms n/15; worked example, amounts specific to the illustration)_ `CG-MCE-085#S16`
  > “Purchases-Desktop Computers increases (debit) for the value of the computers, $12,000 ($400 × 30). Since the computers were purchased on credit by CBS, Accounts Payable increases (credit) instead of cash.” — [OpenStax, Rice University — Principles of Accounting, Volume 1: Financial Accounting - 6.7 Appendix: Analyze and Record Transactions for Merchandise Purchases and Sales Using the Periodic Inventory System](https://openstax.org/books/principles-financial-accounting/pages/6-7-appendix-analyze-and-record-transactions-for-merchandise-purchases-and-sales-using-the-periodic-inventory-system), 2026-04-23; Merchandise Purchases > Basic Analysis of Purchase Transaction Journal Entries > Cash and Credit Purchase Transaction Journal Entries - April 7 credit purchase of 30 desktop computers. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S17"></a>In the illustrated cash sale under the periodic system, Cash is debited and Sales is credited by the selling price of the goods ($12,000). _(jurisdiction: United States (US-published introductory financial accounting textbook; the text names no other jurisdiction), entity_scope: illustrative retailer California Business Solutions, conditions: periodic inventory system; customer pays immediately with cash; worked example, amounts specific to the illustration)_ `CG-MCE-085#S17`
  > “Cash increases (debit) and Sales increases (credit) by the selling price of the packages, $12,000 ($1,200 × 10).” — [OpenStax, Rice University — Principles of Accounting, Volume 1: Financial Accounting - 6.7 Appendix: Analyze and Record Transactions for Merchandise Purchases and Sales Using the Periodic Inventory System](https://openstax.org/books/principles-financial-accounting/pages/6-7-appendix-analyze-and-record-transactions-for-merchandise-purchases-and-sales-using-the-periodic-inventory-system), 2026-04-23; Merchandise Sales > Basic Analysis of Sales Transaction Journal Entries > Cash and Credit Sales Transaction Journal Entries - July 1 cash sale of 10 electronic packages. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S18"></a>Under the periodic inventory system, and unlike the perpetual system, a sale produces no entry for the cost of the sale at the time of sale; that cost recognition instead occurs at the end of the period through an adjustment to Cost of Goods Sold. _(jurisdiction: United States (US-published introductory financial accounting textbook; the text names no other jurisdiction), entity_scope: merchandising company using a periodic inventory system (illustrated by the retailer California Business Solutions), conditions: periodic inventory system; stated in contrast to the perpetual inventory system)_ `CG-MCE-085#S18`
  > “Unlike the perpetual inventory system, there is no entry for the cost of the sale. This recognition occurs at the end of the period with an adjustment to Cost of Goods Sold.” — [OpenStax, Rice University — Principles of Accounting, Volume 1: Financial Accounting - 6.7 Appendix: Analyze and Record Transactions for Merchandise Purchases and Sales Using the Periodic Inventory System](https://openstax.org/books/principles-financial-accounting/pages/6-7-appendix-analyze-and-record-transactions-for-merchandise-purchases-and-sales-using-the-periodic-inventory-system), 2026-04-23; Merchandise Sales > Basic Analysis of Sales Transaction Journal Entries > Cash and Credit Sales Transaction Journal Entries - narrative on the July 1 cash sale. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S19"></a>Under the periodic system, at year end the Purchases account(s) are closed and the Inventory account is adjusted to the cost of the merchandise actually on hand at the end of the current year. _(jurisdiction: United States, entity_scope: companies using the periodic inventory system)_ `CG-MCE-085#S19`
  > “At the end of the year the Purchases account(s) are closed and the Inventory account is adjusted to the cost of the merchandise actually on hand at the end of the current year.” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); “Periodic vs Perpetual Inventory Systems”, bullet 4 under “Under the periodic inventory system :”. Verified 2026-09-09.

_Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference._

## The two ways the cost reaches cost of goods sold: with each sale, or at period end
<a id="need-CG-MCE-085-P3"></a>

- <a id="s-CG-MCE-085-S20"></a>In addition to selecting a cost flow method, the company selects one of the inventory systems listed by the document for recording amounts in its general ledger Inventory account(s). _(jurisdiction: United States, entity_scope: companies that hold inventory (retailers, distributors, manufacturers))_ `CG-MCE-085#S20`
  > “In addition to selecting a cost flow method, the company selects one of the following inventory systems for recording amounts in its general ledger Inventory account(s):” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); Introduction, paragraph introducing the periodic/perpetual bullets. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S21"></a>Under the perpetual system the Inventory account is updated continuously: increased by the costs of goods purchased and decreased by the cost of goods sold, so that its balance should reflect the cost of the inventory items currently on hand. _(jurisdiction: United States, entity_scope: companies that hold inventory (retailers, distributors, manufacturers))_ `CG-MCE-085#S21`
  > “The perpetual system indicates that the Inventory account will be continuously or perpetually updated. In other words, the balance in the Inventory account will be increased by the costs of the goods purchased, and will be decreased by the cost of the goods sold. Hence, the balance in the Inventory account should reflect the cost of the inventory items currently on hand.” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); Introduction, perpetual bullet under “the company selects one of the following inventory systems”. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S22"></a>Under the periodic system the Inventory account is updated only periodically (such as on the last day of the accounting year); goods purchased during the year are recorded in temporary Purchases accounts, and at year end the cost of ending inventory is calculated, the Inventory balance adjusted to it, and cost of goods sold calculated at the same time. _(jurisdiction: United States, entity_scope: companies that hold inventory (retailers, distributors, manufacturers))_ `CG-MCE-085#S22`
  > “The periodic system indicates that the Inventory account will be updated periodically, such as on the last day of the accounting year. Throughout the year, the goods purchased will be recorded in temporary general ledger accounts entitled Purchases. At the end of the year, the cost of the ending inventory will be calculated. The Inventory account balance will be adjusted to this amount. At this time, the cost of goods sold is also calculated.” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); Introduction, periodic bullet under “the company selects one of the following inventory systems”. Verified 2026-09-09.

- See above: Under the periodic inventory system, and unlike the perpetual system, a sale produces no entry for the cost of the sale at the time of sale; that cost recognition instead occurs at the end of the period through an adjustment to Cost of Goods Sold. ([CG-MCE-085#S18](#s-CG-MCE-085-S18))

- <a id="s-CG-MCE-085-S23"></a>Under the periodic system, cost of goods sold reported on the income statement is computed by taking the cost of goods available for sale and subtracting the cost of the ending inventory. _(jurisdiction: United States, entity_scope: companies using the periodic inventory system)_ `CG-MCE-085#S23`
  > “The cost of goods sold (which is reported on the income statement) is computed by taking the cost of the goods available for sale and subtracting the cost of the ending inventory.” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); “Periodic FIFO”, paragraph 2. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S24"></a>Cost of goods available is the sum of the beginning inventory of merchandise plus the net cost of the merchandise purchased including freight-in. _(jurisdiction: United States, entity_scope: companies that hold inventory (retailers, distributors, manufacturers))_ `CG-MCE-085#S24`
  > “This is the sum of the beginning inventory of merchandise plus the net cost of the merchandise purchased including freight-in.” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); Unlabeled term-definition (glossary) block following the “Earn Our Certificate for This Topic” panel — definition of “cost of goods available”. Verified 2026-09-09.

_Partly established. Established: at what moment each mechanism posts (S18); the period-end computation's dependence on opening and closing balances (S25). Missing: what is posted under each of the two mechanisms for relieving cost; what inputs each mechanism requires._

_Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference._

## How each mechanism produces the cost of goods sold figure
<a id="need-CG-MCE-085-C3"></a>

- See above: In addition to selecting a cost flow method, the company selects one of the inventory systems listed by the document for recording amounts in its general ledger Inventory account(s). ([CG-MCE-085#S20](#s-CG-MCE-085-S20))

- See above: Under the perpetual system the Inventory account is updated continuously: increased by the costs of goods purchased and decreased by the cost of goods sold, so that its balance should reflect the cost of the inventory items currently on hand. ([CG-MCE-085#S21](#s-CG-MCE-085-S21))

- See above: Under the periodic system the Inventory account is updated only periodically (such as on the last day of the accounting year); goods purchased during the year are recorded in temporary Purchases accounts, and at year end the cost of ending inventory is calculated, the Inventory balance adjusted to it, and cost of goods sold calculated at the same time. ([CG-MCE-085#S22](#s-CG-MCE-085-S22))

- See above: Under the periodic inventory system, and unlike the perpetual system, a sale produces no entry for the cost of the sale at the time of sale; that cost recognition instead occurs at the end of the period through an adjustment to Cost of Goods Sold. ([CG-MCE-085#S18](#s-CG-MCE-085-S18))

- See above: Under the periodic system, cost of goods sold reported on the income statement is computed by taking the cost of goods available for sale and subtracting the cost of the ending inventory. ([CG-MCE-085#S23](#s-CG-MCE-085-S23))

_Partly established. Established: how a system that relieves cost with each sale produces the charge to cost of goods sold (S05, S06); how a system that computes cost at period end produces the charge to cost of goods sold (S18, S22, S23, S25); the inputs the period-end computation requires (S23, S25); the relationship that ties the movement in the inventory asset account over a period to what was purchased into inventory and what was relieved to cost of goods sold (S21). Missing: what a difference between them identifies as the step of the flow that failed._

_Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference._

## What the inventory balance is supposed to contain
<a id="need-CG-MCE-085-P2"></a>

- See above: Cost of goods available is the sum of the beginning inventory of merchandise plus the net cost of the merchandise purchased including freight-in. ([CG-MCE-085#S24](#s-CG-MCE-085-S24))

- <a id="s-CG-MCE-085-S25"></a>Under the periodic inventory system there is no Cost of Goods Sold account; instead cost of goods sold is computed as cost of beginning inventory plus cost of goods purchased (net of any returns or allowances) plus freight-in, minus cost of ending inventory. _(jurisdiction: United States, entity_scope: companies using the periodic inventory system)_ `CG-MCE-085#S25`
  > “Under the periodic inventory system there will not be an account entitled Cost of Goods Sold. Instead, the cost of goods sold is computed as follows: cost of beginning inventory + cost of goods purchased (net of any returns or allowances) + freight-in – cost of ending inventory.” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); Unlabeled term-definition (glossary) block following the “Earn Our Certificate for This Topic” panel — definition of “cost of goods sold”, continuation paragraph. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S26"></a>The credit that decreases Merchandise Inventory for a purchase discount taken is explained as aligning with the Cost Principle, reporting the value of the merchandise at the reduced cost. _(jurisdiction: United States, entity_scope: Merchandising entities using a perpetual inventory system, as presented in an introductory financial accounting textbook, conditions: perpetual inventory system; purchase discount taken)_ `CG-MCE-085#S26`
  > “Merchandise Inventory decreases to align with the Cost Principle, reporting the value of the merchandise at the reduced cost.” — [OpenStax, Rice University — Principles of Accounting, Volume 1: Financial Accounting - 6.3 Analyze and Record Transactions for Merchandise Purchases Using the Perpetual Inventory System](https://openstax.org/books/principles-financial-accounting/pages/6-3-analyze-and-record-transactions-for-merchandise-purchases-using-the-perpetual-inventory-system), 2026-04-23; Section 6.3 Analyze and Record Transactions for Merchandise Purchases Using the Perpetual Inventory System > Purchase Discount Transaction Journal Entries > analysis of the May 10 payment entry. Verified 2026-09-09.

- <a id="s-CG-MCE-085-S27"></a>In the worked example, payment made inside the 10-day discount window is recorded by debiting Accounts Payable for the original amount owed of $4,020 before any discounts are taken, crediting Cash for the amount owed less the discount, and crediting the item-specific Merchandise Inventory account for the amount of the 5% discount. _(jurisdiction: United States, entity_scope: Illustrative retailer (California Business Solutions) in the textbook's worked example, conditions: perpetual inventory system; purchase on credit with terms 5/10, n/30; payment made within the 10-day discount window)_ `CG-MCE-085#S27`
  > “Accounts Payable decreases (debit) for the original amount owed of $4,020 before any discounts are taken. Since CBS paid on May 10, they made the 10-day window and thus received a discount of 5%. Cash decreases (credit) for the amount owed, less the discount. Merchandise Inventory-Tablet Computers decreases (credit) for the amount of the discount ($4,020 × 5%).” — [OpenStax, Rice University — Principles of Accounting, Volume 1: Financial Accounting - 6.3 Analyze and Record Transactions for Merchandise Purchases Using the Perpetual Inventory System](https://openstax.org/books/principles-financial-accounting/pages/6-3-analyze-and-record-transactions-for-merchandise-purchases-using-the-perpetual-inventory-system), 2026-04-23; Section 6.3 Analyze and Record Transactions for Merchandise Purchases Using the Perpetual Inventory System > Purchase Discount Transaction Journal Entries > analysis of the May 10 payment entry. Verified 2026-09-09.

_Not established from an authoritative source._

_Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference._

## Which acquisition costs are included in the recorded cost of inventory
<a id="need-CG-MCE-085-C2"></a>

- See above: Cost of goods available is the sum of the beginning inventory of merchandise plus the net cost of the merchandise purchased including freight-in. ([CG-MCE-085#S24](#s-CG-MCE-085-S24))

- See above: Under the periodic inventory system there is no Cost of Goods Sold account; instead cost of goods sold is computed as cost of beginning inventory plus cost of goods purchased (net of any returns or allowances) plus freight-in, minus cost of ending inventory. ([CG-MCE-085#S25](#s-CG-MCE-085-S25))

- See above: The credit that decreases Merchandise Inventory for a purchase discount taken is explained as aligning with the Cost Principle, reporting the value of the merchandise at the reduced cost. ([CG-MCE-085#S26](#s-CG-MCE-085-S26))

- See above: In the worked example, payment made inside the 10-day discount window is recorded by debiting Accounts Payable for the original amount owed of $4,020 before any discounts are taken, crediting Cash for the amount owed less the discount, and crediting the item-specific Merchandise Inventory account for the amount of the 5% discount. ([CG-MCE-085#S27](#s-CG-MCE-085-S27))

_Not established from an authoritative source._

_Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference._

## What must be set up before your accounting system relieves cost on its own
<a id="need-CG-MCE-085-P5"></a>

_Not established from an authoritative source._

## System setup that automatic cost relief depends on, and what stays manual
<a id="need-CG-MCE-085-C4"></a>

_Not established from an authoritative source._

## Checking it worked: tying the inventory movement to purchases and cost of goods sold
<a id="need-CG-MCE-085-P6"></a>

- See above: Under the perpetual system the Inventory account is updated continuously: increased by the costs of goods purchased and decreased by the cost of goods sold, so that its balance should reflect the cost of the inventory items currently on hand. ([CG-MCE-085#S21](#s-CG-MCE-085-S21))

- See above: Cost of goods available is the sum of the beginning inventory of merchandise plus the net cost of the merchandise purchased including freight-in. ([CG-MCE-085#S24](#s-CG-MCE-085-S24))

- See above: Under the periodic inventory system there is no Cost of Goods Sold account; instead cost of goods sold is computed as cost of beginning inventory plus cost of goods purchased (net of any returns or allowances) plus freight-in, minus cost of ending inventory. ([CG-MCE-085#S25](#s-CG-MCE-085-S25))

- <a id="s-CG-MCE-085-S28"></a>The total of cost of goods sold plus the cost of the ending inventory should equal the cost of goods available. _(jurisdiction: United States, entity_scope: illustrative retailer (Corner Bookstore example), periodic average method)_ `CG-MCE-085#S28`
  > “The total of the cost of goods sold plus the cost of the inventory should equal the cost of goods available ($88 + $352 = $440).” — [AccountingCoach, LLC (author Harold Averkamp, CPA, MBA) — Inventory and Cost of Goods Sold: In-Depth Explanation with Examples](https://www.accountingcoach.com/inventory-and-cost-of-goods-sold/explanation), Free “In-Depth Explanation with Real-World Examples”; Copyright © 2026 AccountingCoach, LLC (illustrations use the year 2025); “Periodic Average”, paragraph 4 (Corner Bookstore illustration). Verified 2026-09-09.

_Not established from an authoritative source._

_Required authority: authoritative professional or accounting standard. Highest achieved: high quality professional secondary reference._

## Not yet fully established from an authoritative source

- Establish the treatment of goods acquired for resale as an asset until sale, and the event that triggers the charge to cost of goods sold, the accounting reason the acquisition and that charge fall at different moments, and the accounts debited and credited on each leg of the purchase entry and of the entry that relieves cost when a sale is recorded, including the recording of the revenue side of a sale separately from the cost side. _(established; below the required authority class)_
- Establish which incidental acquisition costs are included in the recorded cost of inventory and which are excluded and charged to the period. _(not established; below the required authority class)_
- Establish how a system that relieves cost with each sale and a system that computes cost at period end each produce the charge to cost of goods sold, including the inputs the period-end computation requires, and establish the relationship that ties the movement in the inventory asset account over a period to what was purchased into inventory and what was relieved to cost of goods sold, together with what a difference between them identifies as the step of the flow that failed. _(partly established; below the required authority class)_
- Establish what setup mainstream small-business accounting systems require before they relieve inventory cost automatically on a sale, and what those systems leave to a manual entry. _(not established)_
- Establish that goods acquired for resale are carried as an asset until they are sold, that the charge to cost of goods sold is triggered by the sale, and explain the accounting reason the acquisition and the charge are separated in time. _(established; below the required authority class)_
- Identify which costs incurred to acquire the goods attach to them in inventory and which are charged to the period as incurred, so the reader knows what the inventory balance is supposed to contain. _(not established; below the required authority class)_
- Distinguish the two mechanisms for relieving cost, stating for each what is posted, at what moment, and what inputs the mechanism requires, including the period-end computation's dependence on opening and closing balances. _(partly established; below the required authority class)_
- Demonstrate the entry structure for the purchase and for the relief on sale, naming the accounts on both sides of each and keeping the revenue side of a sale distinct from the cost side. _(established; below the required authority class)_
- Explain what must be configured in the accounting system before cost relief happens on its own, and identify which steps remain manual when that configuration is absent or partial. _(not established)_
- Establish how the reader checks the result: reconciling the movement in the inventory asset account against purchases and cost of goods sold for the period, and identifying what a difference points to. _(not established; below the required authority class)_

## Related

- [Does my business have to track inventory, or can I just expense what I buy when I buy it?](https://uppago.com/resources/does-my-business-have-to-track-inventory-or-can-i-just-expense-what-i-buy-when-i)

_Reference date 2026-09-07. Statements are quoted verbatim from their sources; scope and verification dates are shown on each._