Paid Cash for Business Supplies and Have No Receipts? How to Document It

Plenty of self-employed people buy things with cash: product from a supplier at a swap meet, supplies from a seller who doesn’t hand out receipts, parts picked up on the way to a job. Then tax time comes and the question lands:

"How do I document cash purchases when the seller doesn’t give me a receipt?"

The good news is that a receipt isn’t the only way to prove an expense. The bad news is that "I just remember" isn’t a record either. Here’s the middle ground.

What the IRS actually wants

The IRS expects you to be able to show what you spent, when, with whom, and why it was for your business. A receipt is the easiest way to prove that, but it’s not the only one. Records can include:

• Receipts, invoices, and bills
• Bank and card statements
• ATM withdrawal records
• Canceled checks
• Notes, logs, or calendars made at the time of the purchase
• Photos of items, inventory lists, and sales records that connect the purchase to income

The key word is contemporaneous: records made close to the time of the expense carry more weight than something reconstructed months later.

If the seller won’t give you a receipt

Make your own. Right when you buy:

1. Write it down (or text it to yourself): date, seller or location, what you bought, how much, and what it’s for.
2. Take a photo of the items, or the seller’s booth or listing if appropriate.
3. Ask for a handwritten receipt. Even a scribbled one with date, amount, and item is better than nothing.
4. Note the payment source. If you pulled cash from an ATM that morning, that withdrawal on your statement supports the purchase.

A short note in your phone, made on the day, is stronger than an invoice-shaped memory in April.

For resale inventory: connect purchase to sale

If you buy products to resell, the story you want to be able to tell is simple: I bought this, for this much, and I sold it for that. Keep:

• A running inventory list with purchase date and cost
• Sales records (listings, payment app history, invoices)
• A tally of what’s left at year end

Inventory has its own tax treatment, and rules can depend on your size and method, so check current IRS guidance or ask a pro if inventory is a major part of your business.

If you already lost the receipts

Don’t panic, and don’t invent anything. You can rebuild records honestly:

• Pull bank, card, and payment app statements for the year.
• Check your email for digital receipts and order confirmations.
• Ask vendors for duplicate invoices where possible.
• Reconstruct from other evidence: calendars, texts, photos, supplier price lists.
• Write a clear, dated summary of what you did to estimate, and keep it with your records.

Courts have, in some cases, allowed reasonable estimates when an expense clearly happened but documentation is incomplete. But that’s a fallback, not a plan, and it only works with honest, reasonable numbers. If you can’t support a deduction, it’s better to skip it than to guess.

Mixing cash with personal money is the real trap

The worst version of this problem is cash business spending blended into personal spending with no trail. A few habits help:

• Use a separate business account or card for as much as possible.
• When you must use cash, withdraw a set amount for business and track it.
• Reimburse yourself on paper if you use personal money for business, and write down what it covered.

What to do about big purchases

Records matter more as amounts grow. For anything significant (equipment, a vehicle, a large inventory buy), insist on an invoice or bill of sale with date, parties, and amount. Travel and some other categories have stricter documentation rules, so don’t assume the same casual standard applies.

This is why Toozi exists

Receipts are a pain because they live everywhere: wallets, glove boxes, email, camera rolls. Toozi lets you text a photo or a quick note the moment you buy something, then sorts it into the right category so you have a clean record at tax time.

The Toozi team

Toozi isn’t your CPA and this isn’t formal tax advice. It’s the plain-English version. Recordkeeping requirements vary by situation, so check current IRS guidance or talk to a pro about yours.