Invoice vs. Receipt: What's the Difference?

An invoice is issued before payment. It itemizes what was delivered, states the amount owed, and sets payment terms. A receipt is issued after payment. It confirms money changed hands and closes the transaction.

In accounting terms, an invoice creates an account receivable on the seller\'s books and an account payable on the buyer\'s books. A receipt clears both.

Send an invoice whenever you deliver goods or services on credit — anything other than cash or card on the spot. Send a receipt every time you accept payment, whether it was invoiced first or paid immediately.

Retailers at a point of sale typically skip the invoice step and issue a receipt directly. Service businesses, freelancers, and B2B vendors almost always invoice first and receipt second.

The IRS accepts both invoices and receipts as business records, but they document different things. Invoices prove what you billed (useful for revenue recognition and accounts receivable aging). Receipts prove what was paid (required to substantiate deductible expenses).

Keep both for at least three years, and seven years if the deduction involves depreciation or a bad-debt write-off.

• Labeling a document "Invoice" when the customer has already paid — this confuses their AP team and delays future orders.
• Skipping the receipt after an invoiced payment. You still need to confirm receipt of funds, or the invoice stays "open" on both sides.
• Reusing invoice numbers. Every invoice needs a unique sequential number for audit trails.
• Forgetting payment terms on the invoice. "Net 30" or "Due on receipt" prevents disputes later.