When the IRS tells you your audit case was closed, it means the examiner has finished reviewing your return, a supervisor has signed off, and the file has moved out of the examination division into central processing. The examiner no longer controls your case and generally will not request more documents or accept new evidence.1Internal Revenue Service. 4.25.10 Case Closing Procedures Whether that is genuinely the end of the matter depends on the outcome attached to the closure: no change, agreed adjustments, or a disagreement that now moves to a different track.
Closed Is a Workflow Status, Not Always a Final Answer
“Closed” describes what is happening inside the IRS, not necessarily your final tax bill. If you agreed with the examiner’s findings and signed the paperwork, closure really is the end. If you rejected proposed changes, closure just means the examiner is done with the file; your dispute continues on a separate path with its own deadlines.
You can see the change on your account transcript. A Transaction Code 421 reverses the examination indicator that was placed on your account when the audit began, and a TC 300 shows any additional tax the exam assessed. Together those codes confirm the audit is complete and any resulting changes have been posted.
The Three Outcomes a Closure Can Carry
No Change
The best result. The IRS reviewed your return and accepted it as filed. You owe nothing extra, no adjustments are made, and you receive a letter confirming it. The matter is finished.
Agreed
The examiner found something and proposed adjustments, and you accepted them. You sign Form 870, formally the “Waiver of Restrictions on Assessment and Collection of Deficiency.” The form itself states that by signing you give up the right to contest those tax years in Tax Court, unless the IRS later determines additional deficiencies beyond what the waiver covers.2Internal Revenue Service. Form 870 Signing has one practical upside on interest: if the IRS does not send you a payment demand within 30 days after you file the waiver, interest stops running during that gap.3Office of the Law Revision Counsel. 26 U.S. Code 6601
Disagreed
The examiner proposed adjustments and you refused to accept them. The case still closes from the examiner’s side, but the IRS will issue a formal notice giving you the chance to challenge the findings through appeals or in court. This is the outcome that demands the most attention to deadlines. Miss one and you lock in a bill you might have successfully fought.
How to Confirm the Audit Is Really Closed
For individual taxpayers, Letter 987 is the standard closing letter. It summarizes any adjustments and confirms no further action is required for the tax year in question, and it should carry a supervisor’s signature and a final assessment date. If the examiner computed interest separately, Letter 3535 may follow with that calculation.4Internal Revenue Service. 4.4.7 Correspondence and Closing Letters
If a closing letter never arrives, pull an account transcript through the IRS website.5Internal Revenue Service. Get Your Tax Records and Transcripts The transcript will not say “audit closed” in plain English; look for the TC 421 (examination hold released) and any TC 300 (additional tax assessed).
What You’ll Owe if the Closure Comes With Changes
A closed audit that produces additional tax rarely stops at the tax alone. Interest and often penalties come with it.
Interest runs automatically on any unpaid tax from the original due date of the return until you pay in full. The rate adjusts quarterly and compounds daily. For the first quarter of 2026, the underpayment interest rate for individuals is 7%.6Internal Revenue Service. Quarterly Interest Rates On a return filed several years back, the accumulated interest can rival the additional tax itself.
Penalties depend on why you underpaid. The accuracy-related penalty is 20% and applies when the IRS finds negligence, disregard of tax rules, or a substantial understatement of income tax. A substantial understatement generally means the understated amount exceeds the greater of 10% of the tax that should have been on the return or $5,000.7Office of the Law Revision Counsel. 26 U.S. Code 6662 The civil fraud penalty is 75% of the fraudulent portion of the underpayment. The IRS bears the burden of proving fraud, but once it proves any part was fraudulent, the entire underpayment is presumed fraudulent unless you show otherwise.8Office of the Law Revision Counsel. 26 USC 6663 The two penalties cannot both apply to the same portion of the underpayment; fraud overrides. Interest then runs on both the tax and the penalty amount, which is why audit balances grow quickly when left alone.
Paying the Balance
If the closed audit leaves you with a balance, pay as soon as you can because interest keeps compounding. The IRS accepts payment through EFTPS, Direct Pay, debit or credit cards, and checks mailed with your notice. On a mailed check, write your Social Security number and the tax year so it posts to the right account.
If you cannot pay in a lump sum and owe $50,000 or less in combined tax, penalties, and interest, you can apply online for an installment agreement.9Internal Revenue Service. Payment Plans; Installment Agreements If even an installment plan is not feasible, an Offer in Compromise lets the IRS accept less than the full balance. Eligibility requires that you have filed all required returns, are not in an open bankruptcy, and have made all required estimated payments.10Internal Revenue Service. Offer in Compromise The IRS approves an offer when the amount you propose is the most it can reasonably expect to collect. Most applications are rejected, but for genuine hardship it is worth exploring.
Disputing the Results After Closure
Appeals Conference
If you disagree with the examiner’s findings, file a written protest at the IRS address on your notice within the time limit stated there, generally 30 days.11Internal Revenue Service. Preparing a Request for Appeals The protest needs a statement of the facts you dispute and a legal argument supporting your position. Your case goes to the IRS Office of Appeals, which operates independently from the examination division. Appeals officers settle most cases that reach them, often by splitting the difference when both sides have reasonable positions.
Tax Court Petition
If you miss the 30-day protest window or cannot resolve the matter through Appeals, the IRS issues a Statutory Notice of Deficiency, often called a “90-day letter.” You then have exactly 90 days from the mailing date to file a petition with the United States Tax Court (150 days if the notice is addressed to you outside the country).12Office of the Law Revision Counsel. 26 U.S. Code 6213 This deadline is absolute. File one day late and the Tax Court has no authority to hear you, and the IRS will assess the full proposed amount. A benefit of Tax Court is that you can petition without paying the disputed tax first. If you skip Tax Court, pay the tax, and then file a refund claim, you would have to sue in federal district court or the Court of Federal Claims to recover it.
Audit Reconsideration
Even after an audit is fully closed and additional tax has been assessed, audit reconsideration is available if the assessment remains unpaid and you have new information the examiner did not consider.13Internal Revenue Service. 4.13.1 Examination Audit Reconsideration Process It also applies when the IRS filed a substitute return for you and you later file the actual return, or when the IRS made a computational error. Submit a written request with the new documentation, either on Form 12661 or in your own letter identifying which adjustments you dispute and why. You need genuinely new evidence; resubmitting the same documents will not produce a different answer.
Can the IRS Reopen a Closed Audit?
Yes, though it requires managerial approval and must fall within the statute of limitations. Reopening a closed case takes sign-off from both an immediate manager and a support manager.14Internal Revenue Service. Reopening/Reclosing/Reinputting Records In practice, the IRS does not routinely reopen closed audits; it usually happens when new information surfaces, such as evidence from a related investigation, or when the original closure involved an error.
The general assessment window is three years from the date you filed your return.15Office of the Law Revision Counsel. 26 U.S. Code 6501 Two exceptions matter here. If you omitted more than 25% of your gross income, the IRS gets six years. If you filed a fraudulent return or never filed at all, there is no time limit. So a closed case is not the same as one where the statute of limitations has run. For real finality, watch the calendar; once the assessment period expires, the IRS loses its authority to come after that tax year.
Refunds, State Returns, and What to Keep
If the audit ends with an overpayment, the IRS will issue a refund, typically within four to six weeks after closure, though it may offset the refund against other federal debts such as back taxes from another year or defaulted student loans.
A federal audit that changes your income or deductions almost certainly affects your state return. Most states with an income tax require you to report federal audit changes within a set window after the federal determination becomes final. Deadlines vary by state. States share data with the IRS and can open their own examination based on federal audit results, so check with your state revenue department once a federal audit closes with changes.
Do not shred your records the moment the audit closes. The IRS recommends keeping supporting documents as long as the statute of limitations remains open: three years minimum for a return filed on time and accurately, six years if you failed to report income exceeding 25% of gross income, seven years if you claimed a loss from worthless securities or bad debt, and indefinitely if you filed a fraudulent return or never filed.16Internal Revenue Service. How Long Should I Keep Records? These periods run from the date the return was filed, not from the date the audit closed. Keep the documents that were at issue, your closing letter, and any related correspondence for at least as long as the IRS could theoretically reopen the matter.