IRS receipt requirements

A receipt is not a magic object. It is a record, and the IRS cares about what a record proves rather than what it is printed on. That distinction is the whole reason photographing a receipt works.

This guide covers what the IRS asks of a business record, what makes one adequate, and where electronic copies fit. It is recordkeeping guidance. It does not tell you what to deduct — that is a conversation with a tax professional who knows your situation.

There is no official receipt format

The first useful thing to know is that the law is far less prescriptive than most people assume. Publication 583 puts it plainly: except in a few cases, the law does not require any specific kind of records. The IRS guidance on choosing a system says you may choose any recordkeeping system suited to your business that clearly shows your income and expenses.

So there is no approved receipt template, no required app, and no format that is inherently better than another. What matters is whether the record supports what appears on the return. A crumpled thermal slip from a fuel island counts. So does a photograph of it. So does an invoice emailed by a repair shop.

What does not count is a memory of having spent the money.

The supporting documents the IRS names

Publication 583 lists the categories of supporting documents for expenses. They are worth knowing because they are broader than "receipt":

• Canceled checks
• Cash register tapes
• Account statements
• Credit card sales slips
• Invoices
• Petty cash slips for small cash payments

The IRS guidance on what records to keep names a similar set — sales slips, paid bills, invoices, receipts, deposit slips, and canceled checks — and says to keep them in an orderly fashion and in a safe place, organised by year and by type of expense.

Notice what that list implies. A card statement and a receipt are not the same document and do not prove the same thing. The statement shows an amount paid to a merchant. The receipt shows what was actually purchased. For a fuel stop where you also bought a meal and a pair of gloves, only one of those two documents distinguishes between them.

What a record has to prove

For travel expenses, Publication 463 is specific about the elements you have to be able to prove. There are four:

• Amount — what it cost
• Time — when it happened
• Place — where it happened
• Business purpose — why it was business

A legible receipt usually carries the first three by itself. The vendor name and address give you place, the printed date gives you time, the total gives you amount. Business purpose is the one the paper rarely supplies, which is why a note attached to the record — even a short one — is worth more than it looks.

Publication 463 also describes what it calls adequate records, and the important qualifier is that they be timely kept. Records made at or near the time of the expense carry more weight than a reconstruction assembled months later. This is not a technicality. It is the practical reason to capture a receipt at the fuel island rather than in April.

Why a photograph is a real record

The IRS has accepted electronic records for a long time. Revenue Procedure 97-22, issued in 1997, is the procedure covering electronic storage systems for books and records — it is the reason a digital copy can stand in for the paper original rather than merely sitting alongside it.

Publication 583 describes the conditions an electronic storage system has to meet. It must maintain a complete and accurate record of your data that is accessible to the IRS. It must be able to index, store, preserve, retrieve, and reproduce the records in a legible format. And it must meet the same controls and retention guidelines that apply to the original hardcopy records.

The IRS guidance on recordkeeping states the principle even more directly: all requirements that apply to hardcopy books and records also apply to electronic records. Going digital does not lower the bar. It does not raise it either.

Publication 583 also addresses destroying the paper: original hardcopy records may be destroyed only after testing confirms that the electronic storage system complies with the requirements. In plain terms, satisfy yourself that the copies are genuinely legible and genuinely retrievable before you throw anything away. Plenty of drivers keep the shoebox for the first year while they build confidence in the digital copies, and that is a perfectly sensible way to run the transition.

What "legible" actually demands

Legibility is the condition that quietly does the most work, and it is the one thermal paper fails.

A fuel receipt that has spent a summer on a dashboard is still a document. It is still in your possession. It has satisfied nothing, because there is nothing on it to read. The requirement is not that you kept the paper; it is that the record can be produced and read.

This is the argument for photographing receipts when they are fresh rather than filing them and dealing with it later. A photograph taken the day the receipt was printed captures it at its most readable. The same receipt photographed in April may capture nothing at all, and no storage system can recover text that has already vanished.

Books and supporting documents are two different things

One distinction worth having straight, because it explains why keeping receipts alone is not a complete system.

The IRS guidance describes a recordkeeping system as including a summary of your business transactions — your books — showing gross income along with deductions and credits. Supporting documents are the layer beneath that: the receipts, invoices, statements, and slips that back up the entries.

They do different jobs. The books tell you and anyone else what happened across the year. The supporting documents prove each individual line. A shoebox of receipts with no summary is missing the first half; a tidy spreadsheet with no underlying documents is missing the second.

That is worth knowing before deciding a spreadsheet has solved the problem. A row recording a fuel purchase is an entry, not evidence — it points at a document that has to still exist somewhere. If the document it points at is a blank thermal slip in a glovebox, the entry is pointing at nothing.

A short checklist

None of this is complicated once the principles are separated from the folklore:

• Keep records that clearly show income and expenses. No specific format is mandated.
• Be able to show amount, time, place, and business purpose.
• Make the record at or near the time of the expense.
• Keep it legible, indexed, retrievable, and reproducible.
• Keep the original paper until you have confirmed the copies are sound.
• Store it somewhere it will survive as long as you need it.

How long that last one means is its own question, and the answer has more than one number in it. That is covered in how long to keep tax records. If you want the practical version of all of this — where the paper actually goes and what to do at the pump — see owner-operator recordkeeping.

Sources: IRS Publication 583, Starting a Business and Keeping Records; IRS Publication 463, Travel, Gift, and Car Expenses; IRS, What kind of records should I keep; Revenue Procedure 97-22 (1997), on electronic storage systems. Reviewed against irs.gov on August 5, 2026. IRS publications are revised; check the current editions.

CabSnap is a receipt capture and recordkeeping tool. It is not a tax preparation service and does not provide tax, legal, or accounting advice. Consult a qualified tax professional about your own circumstances.