What Is a Tax Receipt? Valid Proof, Uses, and Recordkeeping

A tax receipt is any document that proves a financial transaction you report on your tax return: a donation acknowledgment letter, a property tax statement, a medical bill, a business expense receipt, or a similar record. Because the U.S. tax system relies on self-reporting, the burden falls on you to back up every deduction and credit you claim. What that documentation has to show, and how long you have to keep it, depends on what you’re deducting.

What Makes a Receipt Valid

Not every scrap of paper qualifies. To hold up during an IRS examination, a receipt generally needs four pieces of information:

The name of the business, organization, or individual you paid.
The date of the transaction, which places the expense in the correct tax year.
The exact dollar amount.
A brief description of what was purchased or the nature of the payment.

These four elements apply broadly, whether the receipt covers office supplies, a medical visit, or a charitable gift. Some categories layer on stricter rules, and those are where deductions most often fall apart in an audit.

Charitable Contributions

Donations to qualified 501(c)(3) nonprofits are among the most common transactions people document for taxes, and the rules shift with the size of the gift.

Gifts Under $250

For any cash or monetary donation, including checks, electronic transfers, and credit card charges, you need either a bank record or a written communication from the charity. A canceled check, bank statement, or credit card statement that shows the organization’s name, the date, and the amount will do.¹ A personal note or check register entry is not enough on its own.

Gifts of $250 or More

For any single contribution of $250 or more, a bank record will not do. You need a written acknowledgment from the charity itself, and federal law requires that acknowledgment to include:

The amount of cash you gave, or a description of any property.
A statement about whether the organization gave you anything in return.
If it did, a description and good-faith estimate of the value.

You must have this acknowledgment in hand by the time you file. If the charity gave you nothing in exchange, which is common for straightforward donations, the acknowledgment has to say so explicitly. Without that statement, the IRS can disallow the entire deduction, even if you clearly made the donation.²

Property Donations

If you donate property rather than cash and claim more than $500, you must file Form 8283 with your return.³ For deductions between $500 and $5,000, complete Section A with a description of the property, its fair market value, and how you determined that value. For deductions over $5,000, you need a qualified appraisal from a qualified appraiser and must complete Section B; the appraisal must be signed and dated no earlier than 60 days before the donation.⁴

Donated vehicles, boats, and airplanes have their own paperwork. The charity must give you Form 1098-C within 30 days of the sale or contribution, showing the vehicle identification number, odometer reading, sale price if the charity sold it, and whether you received anything in return.

Business Expenses

If you run a business or incur work-related expenses, the general rule is that you need documentary evidence for any non-lodging business expense of $75 or more. For lodging, you need a receipt regardless of the amount.⁵ Non-lodging expenses under $75 are exempt from the receipt requirement, though you should still note the amount, date, place, and business purpose.

Some categories face stricter documentation rules. Travel expenses (including meals and lodging away from home), business gifts, and the use of listed property such as vehicles all require you to substantiate the amount, the time and place, the business purpose, and the business relationship of anyone who benefited.⁶ For these, estimates are not acceptable. You need contemporaneous records or strong corroborating evidence.

Medical, State, and Local Taxes

Medical and dental expenses are deductible on Schedule A to the extent they exceed 7.5% of your adjusted gross income. Receipts should show the provider’s name, date of service, amount paid, and a description of the treatment. Track insurance reimbursements too, since only unreimbursed amounts count.⁷ A mileage log with the date, destination, and purpose of each trip serves as your receipt if you drive to appointments and use the standard medical mileage rate.

For state income taxes, local taxes, and property taxes, the statements you receive from the taxing authority are your receipts. They verify the amount, tax type, and payment date, all of which you need if you itemize on Schedule A. Keep the bills and payment confirmations even in years when your total state and local tax payments exceed the federal deduction cap.⁸

When You Don’t Have a Vendor Receipt

You don’t always need a formal receipt from a merchant. The IRS accepts several kinds of supporting documents, including canceled checks, credit card statements, and electronic funds transfer confirmations.⁹ Sometimes a combination is needed to cover every required detail. A credit card statement shows the payee and amount; a separate invoice might be needed to show what was purchased.

Bank records are especially useful for charitable gifts under $250. For gifts of $250 or more, though, the written acknowledgment rule still applies, and a bank statement alone will not satisfy it.

Storing Receipts Digitally

You can scan paper receipts and keep them electronically. The IRS permits this under Revenue Procedure 97-22, which sets the ground rules for electronic storage systems.¹⁰ To meet the standards, your system must produce accurate, legible copies, include an indexing system that lets you locate specific documents, protect stored records against unauthorized changes or deterioration, and maintain an audit trail linking each document back to the relevant entry in your books.

Once you’ve confirmed the electronic system reliably reproduces your paper records, you can destroy the originals. If you use a third-party cloud service, you remain responsible for keeping records accessible and for making sure the service does not restrict IRS access during an examination.¹¹ The IRS also recommends keeping backup copies in a separate location.

How Long to Keep Them

The general rule is three years from the date you filed. That matches the standard period during which the IRS can assess additional tax.¹² Certain situations call for longer:

Six years if you might have omitted income exceeding 25% of the gross income on your return, because the assessment window extends that long.
Seven years if you claim a deduction for worthless securities or a bad debt.
Indefinitely if you did not file a return or filed a fraudulent one. There is no statute of limitations in those cases.

Returns filed before the due date are treated as filed on the due date, so count the three or six years from the April filing deadline, or the extended deadline if you filed an extension.¹³

If You Lose a Receipt

Losing a receipt doesn’t automatically mean losing the deduction, but the path gets harder. Under a longstanding legal doctrine known as the Cohan rule, courts may allow estimated deductions when a taxpayer shows a reasonable basis for the estimate, even without the original receipt. The IRS resolves any uncertainty against you, so the allowed amount will likely be lower than what you actually spent.

The Cohan rule doesn’t apply to expenses that require strict substantiation, including travel, business gifts, and listed property like vehicles. For those, you need actual records or strong corroborating evidence.⁶

If records are destroyed by fire, flood, or theft, secondary evidence may be acceptable: duplicate copies, bank and credit card statements, even testimony about a document’s contents, as long as the destruction was not intentional. The IRS recommends contacting the vendors, financial institutions, or agencies that issued the originals to request copies.

What It Costs If You Can’t Substantiate

If the IRS audits your return and you can’t produce receipts for a claimed deduction, the deduction is typically disallowed. You owe the additional tax plus interest from the original due date of the return. The IRS may also impose a failure-to-pay penalty of 0.5% of the unpaid tax for each month the balance remains outstanding, up to 25%.¹⁴ Interest accrues separately on both the unpaid tax and the penalty.

Charitable contributions carry a sharper consequence. If you claimed a deduction of $250 or more and cannot produce the required written acknowledgment from the charity, the IRS disallows the entire deduction rather than reducing it. Courts have consistently upheld this result, even when the taxpayer could prove the donation was made through other means.²

1
Internal Revenue Service. Substantiating Charitable Contributions
2
Office of the Law Revision Counsel. 26 USC 170 – Charitable, Etc., Contributions and Gifts
3
Internal Revenue Service. Topic No. 506, Charitable Contributions
4
Internal Revenue Service. Instructions for Form 8283
5
Internal Revenue Service. Publication 463, Travel, Gift, and Car Expenses
6
Office of the Law Revision Counsel. 26 USC 274 – Disallowance of Certain Entertainment, Etc., Expenses
7
Internal Revenue Service. Publication 502, Medical and Dental Expenses
8
Internal Revenue Service. Topic No. 503, Deductible Taxes
9
Internal Revenue Service. What Kind of Records Should I Keep
10
Internal Revenue Service. Revenue Procedure 97-22
11
Internal Revenue Service. Automated Records
12
Internal Revenue Service. How Long Should I Keep Records
13
Internal Revenue Service. Topic No. 305, Recordkeeping
14
Internal Revenue Service. Failure to Pay Penalty