Invoice vs Receipt: What's the Difference and When to Use Each
Clients often confuse invoices and receipts — and so do some business owners. Using the wrong document at the wrong time can cause accounting headaches, tax issues, and disputes. This guide explains exactly what each document is, when to use it, and what it must contain.
What Is an Invoice?
An invoice is a request for payment. It tells the buyer what was delivered, what the total cost is, and when payment is due. The key characteristic is that when an invoice is issued, money has not yet changed hands.
Invoices are typically issued:
- After a service is completed
- After goods are delivered
- At agreed billing intervals (monthly retainers, milestones)
- As a proforma (before work begins, to collect a deposit)
What Is a Receipt?
A receipt is proof of payment. It confirms that payment has been received. When you issue a receipt, the transaction is complete.
Receipts are issued:
- Immediately after cash, card, or bank transfer payment is confirmed
- When a client explicitly requests proof for their expense report
- As a follow-up after an invoice is fully paid
The Core Differences at a Glance
| Feature | Invoice | Receipt |
|---|---|---|
| Purpose | Request payment | Confirm payment received |
| When issued | Before or immediately after delivery | After payment is made |
| Payment status | Unpaid / pending | Paid |
| Due date | Yes | No |
| Creates a liability for buyer? | Yes | No |
Can One Document Serve as Both?
Yes — a paid invoice functions as a receipt. When you mark an invoice as "Paid" and add the payment date and method, it simultaneously serves as the record of the transaction and proof of payment.
Many accounting tools (QuickBooks, Wave, FreshBooks) generate a "payment confirmation" that is essentially a paid invoice. If a client asks for a receipt and all you have is an invoice, mark it "PAID" with the date and send it — that's universally accepted for business expense purposes.
Tax and Accounting Implications
Invoices and receipts play different roles in your accounts:
- Accounts receivable tracks open invoices — money owed to you.
- Revenue recognition typically occurs when the invoice is issued (accrual basis) or when payment arrives (cash basis).
- Receipts are the evidence your accountant or auditor needs to verify that revenue was collected.
- For VAT/GST purposes, a tax invoice (invoice with tax amount) is typically the document that triggers the tax obligation.
Frequently Asked Questions
Does my client need an invoice or a receipt?
If they haven't paid yet: send an invoice. If they've already paid and need documentation for their records or expense report: send a receipt (or a paid invoice with the payment date noted).
Is an invoice legally binding?
An invoice alone is not a contract, but it is evidence of a transaction and is admissible in court. A signed contract plus an invoice creates a much stronger legal position if payment is disputed.
What's a proforma invoice?
A proforma invoice is a preliminary invoice issued before work begins, typically to collect a deposit or for customs purposes. It looks like a regular invoice but is labelled 'Proforma' to indicate it's not the final bill.
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