luckpandaAn invoice and a receipt both record a sale, but they sit at opposite ends of it. An invoice is sent before payment to ask for money. A receipt is issued after payment to confirm the money has been received.
Mixing them up causes real problems: a client who receives a "receipt" before paying may think nothing is owed, and a client who only has an invoice may not be able to prove to their own accountant that they paid.
The short answer
- Invoice: "You owe me this amount, by this date." It creates a record of money owed.
- Receipt: "I have received this amount from you, on this date." It records that the debt has been paid.
Side by side
| Invoice | Receipt | |
|---|---|---|
| Purpose | Request payment | Confirm payment received |
| Timing | Before payment, usually at or after supply | After payment |
| Issued by | Seller | Seller (the party that received the money) |
| Key details | Line items, tax, total due, due date, how to pay | Amount received, date, payment method, what it was for |
| Effect in seller's books | Records revenue and an amount receivable | Records cash received and clears the receivable |
| Effect in buyer's books | Records an expense and an amount payable | Evidence the payable was settled |
| Tax use | A tax invoice supports the buyer's input tax claim | Proof of payment; usually not enough on its own to claim VAT or GST |
| Numbering | Invoice series | Receipt series |
What goes on an invoice
An invoice carries the full description of the sale: your details and your client's, a unique invoice number, the issue date and due date, each line with quantity, price and tax, the total due, and payment instructions. Our guide What is an invoice covers each part.
What goes on a receipt
A receipt is shorter. It needs to show:
- The word "Receipt" and a receipt number.
- Your business name and contact details.
- Who paid, if known.
- The date the payment was received.
- The amount received and the currency, for example $12,400.00.
- How it was paid: bank transfer, card, cash, cheque or a payment link, with a reference if there is one.
- What the payment was for, ideally the invoice number it settles.
- The balance still due, if it was a part payment.
How they work together: an example
A consultant in the UK invoices a client £3,600.00 for a month's work, due in 30 days.
- On 1 Oct 2026, the consultant issues invoice INV-2026-0031 for £3,600.00, due 31 Oct 2026.
- On 20 Oct 2026, the client pays £2,000.00 by bank transfer. The consultant issues receipt RCT-2026-0019 for £2,000.00 against INV-2026-0031, showing £1,600.00 still due.
- On 30 Oct 2026, the client pays the remaining £1,600.00. The consultant issues receipt RCT-2026-0020, showing a balance of £0.00.
The invoice is the single source of what was owed. The receipts show how and when it was paid.
When is one document both?
In retail and over-the-counter sales, payment happens at the moment of sale, so one document does both jobs. A till receipt from a shop often contains everything an invoice would, and in some VAT systems it can serve as a simplified VAT invoice. In the UK, retailers can issue a simplified VAT invoice for sales of £250 or less including VAT.
Some businesses also send a "paid invoice": the original invoice marked as paid, with the payment date. That works as proof of payment for many clients, but a separate receipt is clearer when payments are partial or arrive by several methods.
Do you always need to issue a receipt?
Not always. If your client paid by bank transfer, their bank statement and your invoice are often enough evidence. Receipts matter most when:
- The client paid in cash, where there is no other record.
- The client asks for one, often for an expense claim or reimbursement.
- You received an advance before the work started.
- A law or contract requires one. In India, for example, a rent receipt is commonly needed by tenants claiming house rent allowance, and under GST a receipt voucher is generally required when a registered business receives an advance for a supply.
Bills, sales receipts and other names
The words vary by industry and country, which adds to the confusion:
- Bill is usually the buyer's word for an invoice they have received. Restaurants call the request for payment a bill.
- Sales receipt is a receipt issued at the moment of sale when payment is immediate.
- Payment receipt and acknowledgement are other names for a receipt.
- Tax invoice is an invoice that meets VAT or GST rules.
Receipts for advances and deposits
Advances are where the difference between the two documents matters most. If a client pays a deposit before you have supplied anything, there is nothing to invoice yet, but you have received money. Issue a receipt for the deposit that says what it is for, such as "50% advance for website project, as per quote Q-2026-0012".
When you later invoice the full job, show the advance as already paid, so the invoice shows the balance due. Tax rules on advances differ: in India, GST is generally payable when an advance for services is received, and a receipt voucher is issued for it; in the UK, VAT is generally due on a deposit when it is received, which can create a tax point. Ask your accountant how advances are treated where you are.
What to keep, and for how long
Keep a copy of every invoice you issue and every receipt you give or receive, in the form they were sent. Tax authorities treat them as primary records. Typical retention periods are six years for UK VAT records, 72 months from the due date of the annual return for Indian GST records, and at least three years for most US federal tax records, longer in some cases. Digital copies are generally acceptable, as long as they are complete, legible and can be produced on request.
Common mistakes
- Sending a receipt instead of an invoice, so the client thinks they have already paid.
- Issuing a receipt before money has actually arrived.
- Not linking the receipt to the invoice it pays, which makes reconciling part payments slow.
- Using the same number series for invoices and receipts.
- Forgetting to issue a receipt for cash, leaving no record for either side.