Invoice vs Receipt — What's the Difference (and Why It Matters)
Invoices and receipts are often used interchangeably — but legally, they're different documents serving different purposes. Here's when each one applies.
The one-line distinction
- Invoice = a request for payment, issued before payment
- Receipt = proof of payment, issued after payment
Same parties, same goods/services — different purpose, different timing.
When to issue an invoice
Whenever you provide goods or services on credit (i.e. payment is not immediate). The invoice tells the customer:
- How much they owe
- When it's due
- How to pay
- What they're paying for
When to issue a receipt
After payment is received. A receipt confirms:
- Payment has been made in full (or partial)
- What was paid for
- When it was paid
- How it was paid (card, bank, cash)
In most countries, receipts are required by law for cash transactions over a certain threshold.
Can a single document be both?
Yes — many cash businesses issue a single document that functions as both invoice and receipt (a "tax invoice paid in full"). This is common in retail. For services and B2B work, keep them separate to maintain a clean audit trail.
Frequently asked questions
- Do I need to send a receipt after every paid invoice?
- Best practice: yes, especially for B2B where the client's AP team needs proof of payment for their books. A simple email "Payment received — thank you" with the original invoice marked PAID is sufficient.
- Can a quote double as an invoice?
- No. A quote is a price estimate (no obligation to pay). Once the customer accepts and you start work, issue an invoice with a unique number.
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