IRS Audit With Missing Records

What the IRS needs from you when records are missing

An audit is a check of whether the items on your return are right, and the paperwork is mostly your job. IRC 6001 says that “every person liable for any tax” must keep the records the IRS requires. The IRS audit page says the IRS will send “a written request for the specific documents” it wants to see, and its list of commonly requested records adds a warning that matters when records are thin: “No record can stand on its own. You must include the circumstances surrounding any document you send.”

Courts start from the same place. In a Tax Court case the taxpayer generally carries the burden of proof. IRC 7491(a) shifts it to the IRS on a factual issue only if you bring credible evidence, have met the substantiation rules, kept the required records and cooperated with reasonable IRS requests. Missing records make that shift unlikely, so the practical goal is to rebuild enough evidence that the examiner can accept the item.

Losing receipts is common, and the IRS’s own guidance points to other ways to prove an item, explained below. Before you start, confirm what kind of letter you have. A CP2000 is an automated income-matching notice, not an audit; it usually turns on Forms W-2 and 1099 rather than expense receipts. Our guide to the types of IRS audits explains the difference, and the first steps after an audit letter covers deadlines.

How long you were supposed to keep records

The IRS ties record retention to how long it can assess more tax. Its “How long should I keep records?” page (reviewed June 30, 2026) and Publication 583 give these periods:

Two practical points follow. First, an audit of an older year is not a reason to give up: the records for property you bought long ago, such as a home or business equipment, were supposed to be kept anyway, and third parties often still have copies. Second, the IRS audit page says most audits involve returns filed within the last two years, so bank and card statements for the year under review are often still available online. Our post on the audit statute of limitations covers how far back an audit can reach.

What counts as evidence when the receipt is gone

Except in a few cases, Publication 583 says, “the law does not require any specific kind of records.” Any system that clearly shows income and expenses can work, and the IRS’s recordkeeping page says the same rules apply to electronic records as to paper ones.

Proof usually has two parts: that you paid, and what you paid for. Publication 583 says that when you don’t have a canceled check, a legible account statement can prove payment if it shows the check number, amount, payee and posting date (for a check); the amount, payee and posting date (for an electronic transfer); or the amount, payee and transaction date (for a credit card). It then warns: “Proof of payment of an amount, by itself, does not establish you are entitled to a tax deduction.” You also need something showing the cost was incurred for the business, such as an invoice, a contract or a credit card slip.

Your own testimony also counts, within limits. The IRS examiner manual (IRM 4.10.7.3.2, revised July 18, 2025) says uncontradicted statements “which are not improbable or unreasonable should not be disregarded,” but also that oral evidence “should not be used in lieu of available documentary evidence” and cannot replace written records where the law requires them. A specific, consistent account backed by some documents is much stronger than a round number.

Car, travel and gift expenses need stricter proof

Some expenses have their own substantiation rule. IRC 274(d) denies a deduction for travel away from home (including meals and lodging on the trip), gifts and listed property such as a car used partly for business, unless you substantiate “by adequate records or by sufficient evidence corroborating the taxpayer’s own statement” four things: the amount, the time and place (or date and description of a gift), the business purpose, and the business relationship of anyone who received the benefit.

Publication 463 (2025) explains what that means in practice:

• Adequate records are an account book, diary, log, statement of expense, trip sheets or similar record, plus documentary evidence such as receipts, canceled checks or bills. A computer record counts.
• Receipts are generally required for lodging and for other expenses of $75 or more; below that, the written record can be enough.
• Timing matters. A record made “at or near the time” has more value than one prepared later; a weekly log counts as timely.
• Incomplete records can still work if you give your own written or oral statement with specific information and other supporting evidence. For cost, time, place or date, that evidence must be direct (such as written statements from witnesses) or documentary; business purpose can be shown by circumstances, such as delivery invoices that show when the car was used.
• Sampling. An adequate record for part of the year can prove business use for the whole year if you show that period was representative.
• Destroyed records. If you can’t produce a receipt for reasons beyond your control, such as fire, flood or other casualty, you can prove the deduction by reconstructing your records.

Publication 463 is blunt about the rest: “You can’t deduct amounts that you approximate or estimate.” For a car, a rebuilt mileage record should come from evidence created at the time, such as calendar entries, appointment records and repair invoices with odometer readings, and should say it was prepared later. Self-employed owners will find the full list of what examiners check for vehicles, travel and home offices in our guide to audits for the self-employed.

The Cohan rule: when a court may allow an estimate

The Cohan rule is a court doctrine, not an IRS program. It comes from Cohan v. Commissioner, 39 F.2d 540 (2d Cir. 1930), where the appeals court said the tax court “should make as close an approximation as it can, bearing heavily if it chooses upon the taxpayer whose inexactitude is of his own making. But to allow nothing at all appears to us inconsistent with saying that something was spent.” The National Taxpayer Advocate’s 2015 report to Congress describes it as a rule of “indulgence” that courts may use when a taxpayer can show some business spending happened but cannot prove the exact amount.

Three limits matter:

• It does not apply to IRC 274(d) items. The same report states that “the Cohan rule cannot be used in situations where IRC § 274(d) applies”: travel, gifts and listed property such as cars.
• You need evidence that the expense happened. A court will not invent a deduction out of nothing, and it may bear heavily against you if the gap is your own doing.
• It is not a right during the audit. The examiner’s manual tells auditors that conclusions written as “per oral testimony” or “as reasonable” are insufficient “unless the amounts are both de minimis and reasonable” (IRM 4.10.7.3.2). In practice an examiner may accept a reasonable, well-supported reconstruction, but do not count on an estimate being allowed.

The safer course is to rebuild as much real evidence as you can, so that any estimate is a small part of the item rather than all of it.

How to rebuild records for an audit, step by step

The IRS’s own advice on reconstructing records after a disaster (reviewed July 29, 2026) is a good model for any loss: start with transcripts, then bank and card statements, then third parties. These steps follow that order.

1. List exactly what the letter asks for. Write down the tax year, each item under review and the response date. Rebuild only those items; you do not need to recreate a whole year of books if the IRS asked about two expenses.
2. Pull your IRS transcripts. A wage and income transcript lists the Forms W-2, 1098, 1099 and 5498 the IRS received, for the current and nine prior tax years. It shows what income the IRS already knows about and gives you payer names to contact.
3. Download bank and card statements. Get every statement for the year under audit for each business and personal account you used. Most banks and card issuers keep past statements online. Mark each charge or deposit that relates to an item under review.
4. Ask third parties for copies. Request duplicate invoices from suppliers, receipts from stores that keep purchase histories, statements from landlords and utilities, payroll or 1099 records from clients, insurance and loan papers, and closing statements for property.
5. Rebuild the business purpose from what you recorded at the time. Use calendars, email, texts, client files, delivery records and job invoices to show when and why each expense or trip happened. For car, travel and gift expenses, cover amount, time, place and business purpose for each item.
6. Write a summary schedule that ties every amount to proof. List each item, the amount you claim, the documents that support it and a short explanation. Label anything you put together now as a reconstruction prepared on its date, and do not present it as an original record.
7. Ask for more time before the deadline if you need it. For a mail audit, fax a written request to the number on your letter; the IRS says it can ordinarily grant a one-time 30-day extension. For an in-person audit, ask the auditor. No extension is available once you hold a notice of deficiency.
8. Send copies, organized by year and type, and keep proof. Never mail originals. Organize copies by year and type of income or expense, include your summary, and ask for confirmation that the IRS received your response.

Transcripts can be ordered through your IRS Online Account or by phone at 800-908-9946; Form 4506 gets a full copy of a past return. The IRS’s disaster guidance also suggests bank statements and prior tax, sales tax and payroll returns to show business gross sales, and supplier invoices to rebuild lost inventory.

What not to do

A reconstruction is honest when it says what it is. Put a heading such as “Mileage summary prepared [date] from calendar and invoices” on it and attach the evidence it is based on.

• Don’t send originals. The IRS says: “Never mail original records. Send us copies.”
• Don’t pad. Claim only what the evidence supports. An inflated reconstruction can cost you credibility on the items you can prove.
• Don’t miss the deadline while you search. If you don’t respond by the date on the letter, the IRS says it will finish the audit and send a report with its proposed changes. Send what you have and say what is coming, or ask for more time first.
• Don’t ignore penalty exposure. Treasury Regulation 1.6662-3(b)(1) says negligence “includes any failure by the taxpayer to keep adequate books and records or to substantiate items properly,” which can support an accuracy-related penalty. The IRS may remove it if you show reasonable cause and good faith, for example records lost in a fire or flood.

If items are still disallowed, and where to get help

If the examiner disallows items you could not prove, you will get a report and a letter giving you time to agree or disagree; see the 30-day letter and whether to agree or appeal. If the case reaches a notice of deficiency, such as a CP3219A, the Tax Court deadline on that notice cannot be extended; see the notice of deficiency guide. Records found after the tax is assessed are not wasted: audit reconsideration lets you ask the IRS to reopen an unpaid assessment with new information. Interest on any tax that stands runs at the federal short-term rate plus 3 percentage points, reset quarterly (7% (IRS.gov, Jul-Dec 2026) this quarter).

Many people can rebuild a few missing receipts on their own. Help is more useful when a whole year of business records is gone, when the examiner is using bank deposits to estimate income, when car or travel expenses are a large part of the change, or when the examiner raises fraud.

• Taxpayer Advocate Service: free help if the IRS problem causes hardship or normal channels have failed, 877-777-4778 (IRS.gov, 2026).
• Low Income Taxpayer Clinics: LITCs represent eligible taxpayers in audits for free or a small fee.
• A representative under Form 2848: an enrolled agent, CPA or attorney can deal with the examiner for you; see Form 2848 and when audit representation is worth it.

Global Gate Tax Relief’s team includes licensed tax attorneys, enrolled agents and CPAs. It offers a free consultation, and if it takes the case, quotes a flat fee upfront; no outcome is guaranteed. Request a free case review or call 1-877-800-8180.

Frequently asked questions

Keep reading in the IRS Audit Guide

• First steps after an audit letterThe first 10 days: deadline, records, transcripts.
• Audits for the self-employedWhat examiners check on Schedule C, from deposits to home offices.
• Audit reconsiderationReopen an assessment when you find records later.
• The 30-day letterAgree, disagree or go to Appeals after the exam report.
• Do you need audit representation?When doing it yourself works and when it doesn't.