Invoice vs Receipt: What's the Difference (Plus VAT Invoices, Pro Formas and Credit Notes)

What is the difference between an invoice and a receipt?

The difference between an invoice and a receipt is timing and purpose: an invoice is issued before payment and asks the customer to pay a set amount by a due date, while a receipt is issued after payment and confirms that the money was received. In short, an invoice says "please pay" and a receipt says "you paid".

In everyday business the lines blur. Many online services send a single document that is both: an invoice marked 'Paid', emailed the moment your card is charged. For bookkeeping, that is usually fine, as long as it contains the details your accountant and tax authority need.

Invoice vs receipt at a glance

• When it is issued: an invoice before payment (or at the time of sale); a receipt after payment.
• Purpose: an invoice requests payment and records what was sold; a receipt proves payment.
• Typical contents of an invoice: seller and buyer details, a unique invoice number, issue date, due date, itemized goods or services, amounts, any tax charged and payment instructions.
• Typical contents of a receipt: seller name, date, items or description, amount paid and payment method; it may not name the buyer.
• Who uses it: freelancers and businesses issue invoices to clients; shops, apps and online services issue receipts to customers.
• In your books: invoices you issue are your income records; invoices and receipts you receive support your expenses.

Example: you hire a web developer for a project. They send you an invoice for 2,000 with a 14-day due date. You pay by bank transfer, and the developer either emails a receipt or marks the invoice as paid. For your records, the invoice shows what you bought and the tax charged; the receipt or your bank statement shows that you paid it. Your accountant will want the invoice in every case, and the payment proof is a useful backup.

What is a tax invoice or VAT invoice?

A tax invoice (called a VAT invoice in the UK and EU, and a tax invoice in Australia and New Zealand for GST) is an invoice that contains the specific details the law requires. These typically include the supplier's VAT or GST registration number, a unique sequential number, the date, the buyer's details for larger amounts, a description of the supply, the tax rate and the amount of tax charged.

Why it matters: if you are registered for VAT or GST, you generally need a valid tax invoice to reclaim the tax you paid on a purchase. A card slip or a payment confirmation from your bank may not be enough. Some countries also allow simplified invoices for smaller purchases. The exact requirements and thresholds vary and change, so check with your accountant or tax authority, such as HMRC in the UK or the ATO in Australia.

In the US there is no federal VAT. Sales tax is set at state and local level, and businesses generally rely on ordinary invoices and receipts to support their expenses. The IRS expects records that show the amount paid, the date and what it was for; your accountant can tell you what is sufficient for your situation.

What is a pro forma invoice?

A pro forma invoice is a preliminary document that looks like an invoice but is really a detailed quote or a request for an advance payment. It sets out what will be supplied and at what price, so the buyer can approve a purchase, arrange financing or, in international trade, prepare customs paperwork.

• It is not a demand for payment in the accounting sense and is not recorded as a sale.
• It usually cannot be used to reclaim VAT or GST.
• Once the deal goes ahead, the supplier issues a proper (tax) invoice, and that is the document your accountant needs.

If you find pro formas in your inbox when collecting documents, keep them for reference but make sure you also have the final invoice for each payment.

Quotes and estimates work the same way. They describe a price you might pay, not a price you owe. Accountants regularly receive quotes, order confirmations and delivery notes from clients who believe they are invoices. A quick test: if the document has no invoice number, no tax details and no statement that payment is due or has been made, it is probably not the one you need.

What is a credit note?

A credit note (sometimes called a credit memo) is issued by the seller to reduce or cancel an invoice that has already been sent, for example after a refund, a returned item, a discount agreed after the sale or a billing mistake. It references the original invoice number and shows the amount being credited, including any tax adjustment.

There is also the opposite document, a debit note, which some businesses use to increase the amount on an earlier invoice or to request a credit from a supplier. It is less common for freelancers, but if one turns up in your inbox, treat it like a credit note: file it with the invoice it refers to.

In many VAT systems you are not supposed to simply delete or edit an invoice once issued; you correct it with a credit note and, if needed, a new invoice. Send credit notes to your accountant together with the invoices they relate to, otherwise your income or expenses may be overstated.

Which documents should you keep and send to your accountant?

• Invoices you issued, including cancelled ones, and any credit notes you issued.
• Invoices and receipts you received for business expenses, preferably full tax invoices if you are VAT or GST registered.
• Credit notes and refund confirmations from suppliers.
• Pro formas and quotes only as background, never instead of the final invoice.
• Payment confirmations and statements, to show that invoices were actually paid.

A PDF or electronic invoice generally counts just as much as a paper one, and some countries are moving toward mandatory structured e-invoicing. Our digital invoices guide explains the formats, and how long to keep invoices covers retention periods in general terms.

Most of these arrive by email, mixed in with order confirmations and newsletters. Our guide to finding invoices in email and the Gmail invoice search cheat sheet show how to pull them out. Inbox Invoices can also scan your Gmail, list invoices and receipts by vendor, date and amount, and export them as one ZIP for your accountant. See how it works.

Summary

Invoice vs receipt comes down to this: an invoice requests payment, a receipt proves it. A tax or VAT invoice is an invoice with the legally required details, a pro forma is a quote in invoice form, and a credit note corrects an invoice already issued. Keep the final invoices, receipts and credit notes, and confirm local requirements with your accountant.

What to read next: learn how to send invoices to your accountant in an organized bundle, and run through the year-end tax documents checklist before filing.