An invoice asks for payment; a receipt confirms that payment has been made. You send an invoice before you’re paid and a receipt afterwards. Bills and statements sit alongside them: a bill is often just another word for an invoice, and a statement summarises an account over time.
An invoice is a request for payment. It lists what you supplied, what it costs, any tax, the total and when and how the client should pay. Until it’s paid, it represents money owed to you, which is why accountants call unpaid invoices accounts receivable.
Invoices are usually sent after work is delivered, or at agreed milestones, and give the buyer time to pay, such as 14 or 30 days. They carry a unique number so both sides can match payments to the right document.
An invoice is also the document your client’s accounts team needs to process the payment. If it’s missing a purchase order number, the right company name or your bank details, it can sit unpaid for weeks, so it pays to get these right first time.
A receipt is proof that money has changed hands. It shows who paid, how much, when and for what. The buyer keeps it for their records, expense claims or tax return, and the seller keeps a copy to show the sale was settled.
Shops and cafés issue receipts on the spot because payment is immediate. Freelancers and service businesses tend to issue an invoice first and a receipt, or a paid invoice, once the money arrives. Some clients, especially individuals and those claiming expenses, will specifically ask for a receipt.
A receipt doesn’t need to be elaborate. A short document, an email or a payment confirmation that clearly links the money to a specific sale is often enough for a client’s records, although tax-registered businesses may face stricter rules on what a receipt must contain.
“Bill” and “invoice” are often used interchangeably. In everyday speech a bill is usually what you get when payment is due straight away, like a restaurant bill or a utility bill, while “invoice” is more common between businesses. Both ask for payment.
A statement of account is different. It doesn’t request payment for a new sale; it summarises every invoice, payment and credit for one client over a period, and shows the balance outstanding. It’s a handy way to chase several open invoices at once.
Statement for {client name}, {start date} to {end date}
{date} Invoice INV-041 1,200.00
{date} Payment received -1,200.00
{date} Invoice INV-047 850.00
Balance due: 850.00 {currency}Some countries and tax systems set specific rules on when a receipt or tax invoice must be issued, so if you’re registered for VAT, GST or sales tax, check the timing rules with your accountant or tax authority.
An invoice typically needs your name or business name and address, the client’s name and address, a unique invoice number, the invoice date, a description of the goods or services, quantities and prices, any tax, the total and payment terms. If you’re registered for tax, add your tax number and follow your local rules for tax invoices.
A receipt is usually simpler: your business details, a receipt or reference number, the date paid, the amount, the payment method and what the payment was for. Linking the receipt to the original invoice number makes the paper trail easy to follow.
Invoice line:
Website redesign, 5 pages | Qty 1 | Rate 2,000.00 | Tax {rate}% | Amount 2,000.00
Receipt line:
Received 2,000.00 {currency} on {payment date} by bank transfer for invoice INV-052. Ref {bank reference}.If you don’t want to create a separate receipt, you can reissue the original invoice marked as paid. Keep the same invoice number and amounts, and add a clear payment note with the date, method and reference. Many clients accept this as proof of payment, though some businesses and some countries’ rules may require a formal receipt, so check if you’re unsure.
In BillFlow, open the invoice details again, add the payment line to the notes and download a fresh PDF. Because your business details are remembered on your device and nothing is uploaded, it takes under a minute. Keep both versions: the original as sent and the one marked paid.
PAID IN FULL on {payment date}
Amount received: {amount} {currency}
Method: {bank transfer / card / PayPal / UPI}, ref {reference}
Thank you for your business.Most of these come down to keeping one clear record per sale. When the invoice number appears on every related receipt, payment note and statement line, anyone checking your books later, including you at tax time, can follow the trail in seconds.
No. An unpaid invoice only shows that money is owed. It becomes evidence of payment when it’s clearly marked paid with the date and method, or when a separate receipt is issued.
Not always. Many business clients rely on their bank records. But if a client asks for one, or local rules require it, send a receipt or a paid copy of the invoice.
A paid invoice keeps its original number. A separate receipt usually gets its own number series, such as RCT-001, while referencing the invoice it settles.
Retention periods vary by country and are often several years. Check your tax authority’s guidance and keep digital copies backed up somewhere safe.
Issue a receipt or note for the amount received and show the remaining balance. A statement of account is a tidy way to show what’s still outstanding.