Invoice vs Receipt: What's the Difference?

Invoices and receipts are both essential financial documents, but they serve very different purposes — and mixing them up can create accounting headaches and even legal issues.

What Is an Invoice?

An invoice is a request for payment sent by the seller to the buyer before payment is made. It details what was provided, how much is owed, and when payment is due. Invoices are forward-looking documents — they say 'you owe me this amount.'

What Is a Receipt?

A receipt is proof that payment has already been received. It confirms the transaction is complete. Receipts are backward-looking documents — they say 'you paid this amount on this date.'

Key Differences at a Glance

Invoice: sent before payment, includes due date, payment terms, and invoice number. Receipt: sent after payment, includes payment date, method, and confirmation of amount received.

Why It Matters for Taxes

Invoices are your record of income earned. Receipts are your clients' record of expenses paid. Both documents are important for tax purposes — you need invoices to report income accurately, and your clients need receipts (or paid invoices) to claim expenses.

When to Send Each Document

Send an invoice when you complete a project or milestone and want to request payment. Send a receipt (or mark the invoice as 'Paid') after you receive payment. In InvoiceQuick, you can mark any invoice as paid to create a clear record of completed transactions.