An invoice asks for money; a receipt confirms money changed hands. They bracket the same transaction from opposite ends: the invoice opens it ("you owe me $850, due in 14 days") and the receipt closes it ("your $850 was received on the 12th"). Send them in the wrong order — or send one when the client needs the other — and you'll create bookkeeping confusion on both sides.
The core difference in one table
| Invoice | Receipt | |
|---|---|---|
| What it says | "Please pay this amount" | "This amount was paid" |
| Issued | Before payment | After payment |
| Contains | Line items, total due, due date, payment instructions | Amount paid, date paid, payment method, what it was for |
| Creates | An obligation (accounts receivable for you, payable for them) | Proof the obligation is settled |
| Client uses it to | Trigger their payment process | Prove the expense for their own accounting or reimbursement |
The timing is the tell. If money hasn't moved yet, the document is an invoice no matter what it's titled. If money has moved, the client needs proof — a receipt.
When you need to issue an invoice
Issue an invoice whenever payment comes after delivery — which is most freelance and B2B work. Companies in particular usually cannot pay you without one: their accounts payable process starts when an invoice lands and not before. The invoice carries the due date, so it also starts the late-payment clock. If you're new to what goes on one, What Is an Invoice? covers every field.
When you need to issue a receipt
Issue a receipt whenever a client pays and asks for confirmation — and offer one proactively when:
- The client paid in cash. A bank transfer leaves its own trail; cash leaves none. The receipt is the only record.
- The client paid before delivery — a deposit or upfront retainer. They've parted with money and hold nothing yet; the receipt is their protection. (For structuring the deposit itself, see Deposit Invoices.)
- An individual paid you and may want reimbursement — from an employer, an insurer, or for their own tax records.
- The client asks. Some bookkeeping processes require a receipt to close out every payment, even when a paid invoice exists.
A receipt doesn't need to be elaborate. Amount, date received, payment method, what it covers, who paid, and who received — that's the whole job.
The simplest approach: make the invoice serve as the receipt
You don't need two separate documents for every transaction. The widely used shortcut: once payment lands, re-issue the same invoice with a paid annotation. Keep the same invoice number, and add a clear line to the notes:
PAID in full on 12 September 2026 by bank transfer. Thank you! This invoice now serves as your receipt.
This works because the marked-up invoice now contains everything a receipt needs — the amount, what it was for, the payer, the payee — plus the payment date and method you just added. One document, one number, a complete story from "amount due" to "amount received."
Two details make this clean:
- State the payment date and method explicitly. "PAID" alone is weaker proof than "PAID on 12 Sep 2026 by bank transfer."
- Don't change anything else. Same number, same line items, same totals. The paid version should be identical to the original except for the annotation — otherwise it stops being a record of the same transaction.
Example: paid invoice serving as a receipt
The original invoice, re-issued after payment with a PAID annotation carrying the date and method — everything a receipt needs on one document.
Which one does your client actually want?
When a client says "can you send me a receipt?" before they've paid, they almost always mean an invoice — ask what they need it for if you're unsure. When they say "can you send an invoice?" after paying in advance, what they usually need is a paid invoice: the document above, issued with the PAID annotation from day one. Matching the document to the moment keeps both sets of books clean.
Both documents take about two minutes in the free invoice generator — itemize the work, use the notes field for the PAID annotation when the time comes, and download the PDF straight from your browser with no signup and no watermark. Your draft autosaves locally, so re-issuing the paid version later is just an edit and a re-download.