I Lost the Receipt: What the IRS Will Accept Instead

Almost every small business owner has had this moment: you're prepping your taxes (or your accountant is asking), and you can't find the receipt for a deduction you know you actually paid for. Maybe the receipt faded. Maybe it never existed because the vendor doesn't print one. Maybe it's in a coat pocket that went through the wash. Maybe you paid in cash to a contractor who didn't bother.

The instinct is either to invent the receipt (don't) or skip the deduction (also don't, if you can avoid it). The truth is messier and more useful: the IRS doesn't actually require a paper receipt for most deductions. They require substantiation. A receipt is the cleanest form, but not the only one. Here's what counts when the receipt is gone.

The Cohan rule: deduct without exact records (sometimes)

The Cohan rule comes from a 1930 court case involving Broadway producer George M. Cohan. The Second Circuit held that when a taxpayer clearly incurred deductible expenses but lacked exact records, the court could estimate a reasonable deduction rather than disallowing the whole claim.

Still good law for many categories of deductions, though Congress has narrowed it over time. The big carve-out: Cohan does not apply to travel, meals, entertainment, gifts, or listed property (cars, computers used personally and for business). Those are the categories most commonly deducted by small businesses, and the IRS requires strict substantiation under IRC Section 274(d). A missing receipt with no replacement evidence can mean a fully disallowed deduction.

For everything else (supplies, office expenses, professional services, repairs, insurance, utilities) you can still claim a deduction supported by less-than-perfect evidence, with the understanding that you may need to defend the estimate if audited.

The $75 rule for travel and meals

The IRS allows a relaxed standard for travel and entertainment expenses under $75. You still need a record of what was spent, when, where, and the business purpose. But you don't need to produce the actual paper receipt. A contemporaneous log entry is enough.

Important: this does not apply to lodging. You need a receipt for hotel stays regardless of amount. It also doesn't automatically mean expenses under $75 are deductible without any record. You still need the contemporaneous note showing the expense happened and what it was for.

In practice: if you grabbed lunch with a client and the receipt is gone, a calendar entry showing the meal, the attendees, and the business purpose, plus a credit card statement line showing the charge, is enough.

What can substitute for a receipt

In order of how strong the substantiation is:

1. The original receipt or invoice from the vendor. Strongest. What you should always have.
2. A duplicate receipt from the vendor. Most merchants will reprint a recent purchase if asked. Worth the call for material amounts. Almost as good as the original.
3. An invoice from the vendor (if they sent one separately). For B2B purchases, the invoice often pre-dates the receipt and lives in your email. Forward it to your books even if you also have the receipt.
4. Bank or credit card statement entry showing the charge. Confirms the payment happened but not what was bought. Combine with item #5 for full substantiation.
5. Contemporaneous notes. A calendar entry, an email mentioning the purchase, a text to a partner, an entry in your books. Should describe what was bought, when, where, and the business purpose.
6. Cancelled check or wire confirmation. Better than nothing for the payment side. Pair with a contemporaneous note for the purpose.
7. A reconstructed log from memory. Weakest substitute. IRS calls this "estimated" rather than substantiated. Subject to disallowance if it's the only evidence and the amount is meaningful.

For most everyday small-business deductions, items #4 + #5 in combination are enough to defend the deduction if challenged. The bank statement shows the charge happened; your note shows what it was for.

Categories that require more than just a bank statement

Some expense categories have heightened substantiation requirements under Section 274 and related regulations. Bank statements alone are not sufficient for:

• Travel: who, what, when, where, why. Lodging receipts required.
• Meals: who attended, business purpose, amount, location, date.
• Entertainment (limited deductibility now): same elements as meals.
• Business gifts over $25: vendor receipt, recipient, purpose.
• Vehicle expenses (under actual-expense method): each receipt for fuel, repairs, etc.; under standard-mileage method, the mileage log itself is the substantiation.
• Charitable contributions over $250: written acknowledgment from the charity.
• Listed property (computers, vehicles used personally and for business): contemporaneous use logs.

For these, a "lost receipt" without backup evidence is often a lost deduction. Capture the receipt at the moment of purchase so this category never becomes a problem.

How to reconstruct a deduction when the receipt is gone

If you're already at the point of preparing taxes and discovering a hole, here's the order of operations:

1. Check email. Surprising number of "lost" receipts were actually emailed to you and got buried. Search for the vendor name, the approximate date, the amount.
2. Check your credit card / bank statement. Pull the statement for the month and find the charge. The merchant name and amount are right there, which is most of the substantiation.
3. Contact the vendor. Many merchants can reprint or re-email receipts up to a year or more later. For online vendors, log in and check your order history.
4. Reconstruct a log. Write up what you remember: date, vendor, amount, what was bought, business purpose. Date the document with the actual reconstruction date (not the original date — that would be fraud).
5. Decide whether to claim it. For modest amounts with bank statement + log, claim it. For large amounts with weak documentation, talk to your accountant about the risk.

What happens in an audit

If you're audited and the auditor asks for documentation of a specific deduction:

• You produce the receipt. Best case. Auditor checks it off, moves on.
• You produce a reasonable substitute (bank statement + invoice, vendor invoice, calendar entry + statement line). For most categories, this is accepted. The auditor may make a note that documentation was less than ideal.
• You produce nothing or only a reconstructed memory. The auditor will often disallow the deduction. For small amounts, they may accept on the Cohan basis. For large amounts in T&E categories, expect disallowance and possibly penalties for negligence.

An audit doesn't typically demand every receipt — it samples. The auditor might ask for ten random expenses across the year. Ten clean ones in a row suggest the rest are also clean; ten messy ones suggest deeper investigation is warranted. The defensive posture is to make every receipt clean from the start so that any ten the auditor picks are well-substantiated.

The prevention argument

Every section above describes the recovery path. The cheaper path is to never have the problem. A receipt captured the moment of purchase — photographed, forwarded, or texted to your books — is documented forever. The thermal paper can fade to nothing; the digital record persists. You don't have to remember to do anything later; the work was done at the moment of payment.

The mechanism is simple. The discipline is harder. If you've been the person at year-end staring at a credit card statement trying to remember what a $147 charge from "SQ *AC HARDWARE" was for, the problem isn't your memory — it's that the system relied on your memory in the first place. Capture at the source removes the dependency.