I found an error in a period I already closed and reported — do I fix it in the old period or in the current one, and what do I do about the statements I already gave out?

What is the difference between restating the closed period and correcting it now?

Restating changes history. The FASB's Statement No. 154, Accounting Changes and Error Corrections, defines restatement as the process of revising previously issued financial statements to correct an error. It requires an error in a prior period's statements that is discovered after they were issued to be reported as a prior-period adjustment by restating them, and says restatement requires all three of the following:

• The cumulative effect of the error on periods before those presented is reflected in the carrying amounts of assets and liabilities at the beginning of the first period presented.
• Any offsetting adjustment is made to the opening balance of retained earnings, or other appropriate components of equity or net assets, for that period.
• The statements for each prior period presented are adjusted for the period-specific effects of the error.

Statement 154, dated May 2005, sets rules of U.S. generally accepted accounting principles (GAAP); confirm its current wording with your accountant. If your statements are prepared on the cash, income-tax or another special-purpose basis, ask your accountant whether the same restatement and disclosure apply before you choose.

Correcting forward leaves the closed period exactly as reported and puts the whole effect into the current period. Statement 154 says its provisions need not be applied to immaterial items, which is what leaves room for this route when an error is immaterial.

The two differ most when a reader compares periods. After a restatement, both periods show what happened, so the change between them is real. After a forward correction, the closed period stays wrong and the current period carries an amount that belongs to the one before, so both are off by the same amount in opposite directions and the change between them is off by twice the error.

What does the same error look like under each choice?

In March 2026 you find that a $4,500 deposit on December 18, 2025, the proceeds of a new equipment loan, was recorded as sales. The 2025 statements went to the bank, and the 2025 return built from them reported $4,500 too much income. 2025 was reported with net income of $60,000; suppose 2026 ends at $70,000 before any correction. The deposit arrived in 2025 and loan proceeds are not sales on either basis, so the example reads the same on the cash and the accrual basis. If your error is in an invoice or bill still unpaid at the period end, work out with your accountant how it falls on your basis before choosing.

Restating with 2025 reopened, the entry is dated December 31, 2025:

Restating with 2025 left locked, the correction is posted on January 1, 2026 against opening equity, and the 2025 statements are shown as restated when next presented:

With 2025 left locked, 2025 reports run from the file still show the old figures, so the restated 2025 statements (net income $55,500, loan payable $4,500) must be prepared outside the file; never send a report from the locked period as the restated version.

Correcting forward, the entry is dated in 2026 and kept on its own line in the income statement rather than netted into sales:

Check any loan repayments already posted in 2026: recode principal to Loan payable and interest to interest expense, then agree the loan balance to the lender's statement.

The effect on net income:

Both routes put the loan on the books by the end of 2026 and give the same two-year total, 125,500. Only restating keeps the comparison true; correcting forward understates the growth by 9,000.

Which factors decide where the correction goes?

Three factors decide it, and ease of posting is not one of them:

• Significance. AR-C section 90, the AICPA's standard for reviews of financial statements, explains that financial reporting frameworks generally treat misstatements as material if there is a substantial likelihood that, individually or in the aggregate, they would influence the judgment of a reasonable user. It adds that materiality judgments are made in light of surrounding circumstances and involve both qualitative and quantitative considerations.

  Measure the error against the figures it touched, such as net income, the affected lines and equity, and weigh its nature: one that turns a loss into a profit can matter though small.

• Reliance. Statement 154's restatement rule concerns statements already issued. When deciding whether reviewed statements need revision, AR-C 90 says the accountant may consider, in addition to what the reporting framework requires, whether people are using or likely to use them and who would attach importance to the new facts, along with any upcoming reviewed or audited statements for a later period, the time elapsed since issue, the date the review report was released and any legal implications.

  Those considerations add to the framework's requirements rather than replace them: reliance does not remove Statement 154's requirement to restate a material error in issued statements.

• Whether the period can still change. A software lock, your own close policy or an accountant's sign-off can each rule out reopening, as the software section below explains.

Two opposite mistakes follow. Choosing the route that is easier in the software ignores what the error did to figures others used. Restating every trivial slip reopens closed periods and reissues statements for items no reader would weigh, which Statement 154 does not require. If the correction would be large against the current period's result, take it to your accountant before choosing. Agreeing in advance with your accountant which kinds of error you restate and which you correct forward makes each case quicker to decide and easier to defend.

Did the error change the reported result, or only where a balance sits?

Statement 154 defines an error in previously issued financial statements as an error in recognition, measurement, presentation or disclosure, resulting from mathematical mistakes, mistakes in the application of GAAP, or oversight or misuse of facts that existed when the statements were prepared. A misclassification is therefore still an error; what differs is its reach.

An error that changed net income also changed equity, and it reaches everyone who used profit: a lender's coverage test, the owners' shares, the tax return. Every holder in the next section has to be considered.

An error that only moved a balance within the balance sheet, such as showing the part of a loan due within twelve months as long-term, leaves net income and total equity unchanged, so nobody who relied only on profit is affected. It still matters to anyone who tested working capital or a current ratio, so check what each holder used before treating it as harmless. If no holder used the affected lines and the amount is immaterial, reclassify it in the current period and record why.

Can the software still post into the closed period, and what does it record?

Check before choosing, because a restatement the file will not take is not yet a decision. Intuit's help page Lock your books in QuickBooks Online (updated September 15, 2026) offers two settings, allowing changes after a warning or after a warning and a password, and says any attempt to change transactions dated on or before the lock date will trigger the warning or password prompt you set. Intuit's page Edit your closed books in QuickBooks (updated August 5, 2026) says an Exceptions to Closing Date report shows any changes made after you close your books. So in that product the lock stops casual changes, not deliberate ones: a user who clears the warning, or has the password, can still post into the closed period, and the report is how you and your accountant see that it happened. Intuit's Lock your books page also notes that transactions before the closing date can't be edited, while its setting descriptions say users can still make changes after the warning or password; check what your own file does. For any other system, read that vendor's own documentation on what its lock allows and records.

A lock set by policy or by an accountant's sign-off binds even when the software would let you through: do not reopen that period on your own, and consult the accountant first. Restating does not require reopening: the second entry in the example carries the correction through opening equity, with the restated statements prepared outside the file. Whether to reopen a reconciled month, and how to close and lock a period, are separate questions.

What do you owe each party holding the old figures?

Each holder is owed something different, so take them one at a time.

What if the statements never left the business?

If only staff and the owner or owners who run the business saw them, there is no outside party to notify and no statement to reissue; the question reduces to the accounting placement, decided on the factors above. Tell everyone who used them which version is now current, and keep the record. A co-owner who does not run the business but received them is a holder, covered below. A return filed from those figures is still an outside use, covered below.

What do you owe a lender, insurer or other institution?

Your loan agreement, compliance certificate, insurance policy or application governs, and no general rule replaces it. Read its terms on financial reporting, notice of changes and deadlines now, since a stated window may already be running and turns a courtesy into an obligation. Where the figures support a live application or a covenant, take the agreement to your accountant promptly, then send any corrected statements, labelled as described below, within any window it sets. If the error moves a covenant ratio, that is a question under your agreement whatever its materiality to the statements.

What do you owe an investor, partner or co-owner?

Your partnership, operating or shareholder agreement sets what owners are entitled to receive and when. If you restated, send each owner who received the old figures the labelled corrected statements and a note. If you corrected an immaterial error forward, there is nothing to reissue: follow any notice term in the agreement and record why. If the business's income is reported on the owners' own returns, name them to the tax professional, because the filing question can reach them.

What do you owe the IRS or a state?

A filed return raises a separate decision, set out in the tax section below.

What changes if an accountant reviewed the statements?

When the accountant who reviewed them learns of the error after releasing the report, AR-C 90 says the accountant should discuss it with management and, when appropriate, those charged with governance, and determine whether the statements need revision. If statements already given to third parties are revised, or the accountant believes they need revising and management does not revise them, AR-C 90 has the accountant assess whether management's steps are timely and appropriate to ensure anyone holding them is informed, including that the reviewed statements are not to be used. If management does not take those steps, the accountant will seek to prevent future use of the review report. AR-C 90's guidance lists steps management may take:

• Notify anyone known to be using, or likely to use, the statements and the report that they are not to be used and that revised statements with a new report will be issued, which may be necessary when those are not imminent.
• Issue revised statements with appropriate disclosure as soon as practicable.
• Disclose the matter in the next period's statements, which may be appropriate when that period's reviewed or audited statements are imminent.

The same steps are a sound model where no accountant was involved. Correcting the books and telling nobody leaves the old figures in use, and the difference surfaces later where you do not control it.

What must a corrected statement make plain?

Statement 154 requires restated statements to disclose that the previously issued statements have been restated, with a description of the nature of the error. It also requires these two disclosures:

• The effect of the correction on each financial statement line item and any per-share amounts affected, for each prior period presented.
• The cumulative effect on retained earnings or other appropriate components of equity or net assets, as of the beginning of the earliest period presented.

Statement 154 requires further disclosures as well; have your accountant confirm the full set.

So that nobody is left holding two versions of one period, title each corrected statement "Restated", date it, name the version it replaces by its date, and send it with a short note stating the error, the lines and amounts changed, and that the earlier version should no longer be used.

If an accountant reviewed them, AR-C 90 says the accountant's report on the restated statements should state that they have been restated.

What if the period's figures went into a tax return?

The return is a separate decision from where the books are corrected. IRS Tax Topic 308, written for individual returns amended on Form 1040-X, says that if you discover an error after filing your return, you may need to amend it, and to file an amended return if there is a change in your filing status, income, deductions, credits or tax liability. It adds that a change to your federal return may affect your state tax liability, for which you contact your state tax agency. Whether the error changed a figure on the return, and whether and how to amend, is for the business to decide with a tax professional. Treasury Circular 230, the regulations governing practice before the IRS, requires a practitioner retained by a client on an IRS matter who knows the client has not complied with the revenue laws, or has made an error in or omission from a return or other document the client submitted, to advise the client promptly of it and of its consequences under the Code and regulations.

Two things should happen meanwhile:

• Do not leave the books wrong so they keep matching the return. IRS Publication 583 says your records must support the income, expenses, and credits you report, and books kept wrong on purpose cannot do that.
• If you correct forward, tell the tax professional about the correction line before the current return is prepared. The correction line is a book entry: whether it belongs on the current return, and whether the earlier return is amended, is the tax professional's decision, so do not treat it as a current-year deduction yourself.

When does the decision stop being yours alone?

The owner or management decides, not a bookkeeper alone: the AICPA's compilation standard (AR-C section 80) notes that even when an accountant prepares them, financial statements are representations of management, and the fairness of their presentation in accordance with the applicable financial reporting framework is management's responsibility. The decision passes to an accountant or other adviser when any of these is true:

• An outside accountant compiled, reviewed or audited the period, and must be consulted before anything is posted, because reopening a period they reported on affects their work as well as your books.
• The error is material to statements that left the business.
• The figures support a live application, a covenant certificate or an insurance declaration.
• A return was filed from the affected figures.
• Owners' shares or distributions were set from the affected profit.
• You cannot tell whether the error is material.
• The correction would be large against the current period's result.

Send the accountant the record described below, the proposed entries, the lock and sign-off status, and the list of who holds the old figures.

What should the record of the correction contain?

Keep one file, written when you decide, with these parts:

• The error. Record what happened, which periods and accounts it touched, the amounts, and how it was found.
• The analysis. Record whether it changed the result or only classification, its size against the figures it touched, and who relied on them.
• The decision. Record the placement, the reasons, who decided and who was consulted.
• The entries. Record each entry's date and reference, and keep the report of changes made after the close.
• The communications. Record who received corrected figures, when, what was sent and any reply.
• The return. Record who is deciding the filing question and what they decided.

Tracing what changed back to the filed or accountant's figures is covered in the related question on prior-year numbers.

What checklist takes you from the error to each notice?

Work through these steps in order:

1. Describe the error: its periods, accounts and amounts.
2. Decide whether it changed the result or only classification.
3. Judge its significance against the figures it touched, in amount and in nature.
4. List who holds the old figures: insiders, a lender or insurer, co-owners, the IRS or a state.
5. If an accountant compiled, reviewed or audited the period, consult them before posting.
6. Check the lock, the password and any sign-off.
7. Choose the placement: restate if the error is material to statements given out, and correct forward on its own line only if it is immaterial. If any condition under "When does the decision stop being yours alone?" applies, decide with your accountant.
8. Read each outside recipient's agreement for notice terms and deadlines.
9. If you restated, send each holder the labelled corrected statements and a note. If you corrected an immaterial error forward, there is nothing to reissue: follow any notice term in each agreement and record why.
10. Put the filed-return question to a tax professional.
11. Complete the record.