What's the difference between an invoice and a receipt?

Two words that get muddled constantly

If you've ever stared at a document and wondered whether it's an invoice or a receipt — or used the words as if they mean the same thing — you're in good company. Loads of founders do. They're easy to mix up because they're both about money and they often list the same items.

But they do opposite jobs, and once you see it, you'll never confuse them again. Here's the one-line version you can keep forever:

An invoice is a request for payment. A receipt is proof a payment was made.

Invoice = please pay me. Receipt = you paid. One comes before the money moves; the other comes after. That's the whole distinction. Everything below just fills it in.

What an invoice is

An invoice is a document you send to a customer asking to be paid for goods or services you've provided. It says: here's what I did or supplied, here's what it costs, here's how and when to pay me.

The key thing: an invoice is issued before the money has changed hands. It creates a debt. The moment you send it, your customer owes you, and that owed money shows up in your records as accounts receivable (money owed to you). It usually carries a due date — "payment within 30 days" — because you're waiting to be paid.

Think of an invoice as the bill at a restaurant where you pay on the way out. The bill arrives, you haven't paid yet, but now you know exactly what you owe. That's an invoice.

What a receipt is

A receipt is a document confirming that a payment has actually been made. It says: this money was paid, on this date, for these things.

The key thing: a receipt comes after the money has changed hands. It doesn't ask for anything — it confirms something already happened. It's proof, for both sides, that the bill was settled.

That little slip the shop hands you when you tap your card? That's a receipt. The payment's done; this is just your proof of it. Same with the confirmation you get after paying an invoice online — that's the receipt for that invoice.

So an invoice and a receipt are often the two ends of the same transaction: the invoice asks, the payment happens, the receipt confirms.

A side-by-side, in plain English

If you remember only one row, remember the last one.

When you use each one

You'll find yourself on both sides of these, depending on the day.

When you sell something: if the customer pays you on the spot (card, cash, instant transfer), you give them a receipt — the money's already in. If you're letting them pay later, you send an invoice first, then a receipt once they pay.

When you buy something: if you pay straight away, the supplier gives you a receipt. If they let you pay later, they send you an invoice (which, from your side, is a bill you owe), and you get a receipt once you've paid it.

So the same transaction can generate both: an invoice when the deal is agreed, a receipt when the money lands. They're not rivals — they're chapters in the same little story.

What each must show in the UK

Both documents need certain details, partly so everyone's clear and partly because HMRC expects proper records. You don't need to memorise these — your invoicing tool fills most in automatically — but it helps to know what "proper" looks like.

A UK invoice should typically show: a unique invoice number, your business name and address, the customer's name and address, the date, a clear description of what you're charging for, the amount due, and the payment terms (when and how to pay). If you're VAT-registered, there's more: your VAT number, the VAT rate and amount, and the total including VAT — that's a VAT invoice, and it's a legal must once you're registered. (See: What is VAT and do I actually have to charge it? →.)

A receipt should typically show: who was paid, the date of payment, what was paid for, the amount, and confirmation that it's been settled. It's lighter than an invoice because its only job is to prove the money moved.

The reason this matters beyond tidiness: these documents are the raw material your accounts are built from. Every sale on your profit and loss statement, every penny owed to or by you, traces back to an invoice or a receipt. Keep them and your numbers tell the truth; lose them and you're guessing. (See: What is a P&L in plain English? →.)

Why getting this right quietly matters

It seems like a tiny distinction. It has real consequences.

If you treat an invoice like a receipt — assuming a job's "done" the moment you send the bill — you can fool yourself into thinking you've been paid when you haven't. That's a fast route to the classic trap of looking healthy on paper while the cash hasn't actually arrived.

And at tax time, receipts for your purchases are your evidence for the costs you're claiming. No receipt, no easy proof — which can mean a cost you can't claim. So the humble receipt isn't clutter; it's money in your pocket.

Keep both, keep them tidy, and your records stay honest with very little effort.

The short version

An invoice is a request for payment, sent before the money moves — it means someone owes you. A receipt is proof a payment was made, issued after the money moves — it means a debt's been settled. The same transaction often produces both: an invoice to ask, a receipt to confirm. Invoices need fuller detail (especially if you're VAT-registered); receipts just prove the payment happened. Keep both, and your numbers stay true.

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Chasing payments and hunting for receipts by hand gets old fast. In Ledgers, you send professional invoices in a couple of clicks, reminders go out automatically until you're paid, and receipts are captured by photo straight into your records — so your books stay tidy without the admin. See your numbers without learning accounting → start free.

Ready to stop wrestling with invoice templates? How to send a professional invoice →

Wondering when the VAT line has to appear? What is VAT and do I actually have to charge it? →

Frequently asked questions

What is the difference between an invoice and a receipt?

An invoice is a request for payment, issued before the money is paid — it means the customer owes you. A receipt is proof that a payment has been made, issued after the money changes hands. Invoice means "please pay"; receipt means "you paid."

Is an invoice proof of payment?

No. An invoice is a request for payment, not proof of it. Proof that a payment was made is a receipt. If you need to show money actually changed hands, you need the receipt, not the invoice.

Do I send an invoice or a receipt?

Send an invoice when you want to be paid later — it asks for the money. Give a receipt after you've been paid — it confirms the money was received. If a customer pays you on the spot, a receipt is usually all that's needed.

What does a UK invoice need to include?

A unique invoice number, your business and the customer's details, the date, a description of what's being charged, the amount due and payment terms. If you're VAT-registered, it must also show your VAT number, the VAT rate and amount, and the total including VAT.

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