What is a payment reference?
A payment reference, also called remittance information, is the short text that travels with a payment to tell the beneficiary what it is for, usually an invoice or purchase order number. It is how the receiving company matches money to the right invoice. Example (invented, for illustration only): "INV-2026-0418 PO 7731 goods", 27 characters, well inside the 140 character limit of a SEPA Credit Transfer.
- A SEPA Credit Transfer carries up to 140 characters of remittance information, either structured or unstructured.
- The Fedwire ISO 20022 format supports structured extended remittance information, which the Federal Reserve says could improve straight-through processing for business payments.
- In Brazil the client classifies the purpose of each foreign exchange operation under Resolution BCB 277, so the invoice number and nature of payment on a wire help the recipient do so.
- Putting the invoice number first protects it if a bank in the chain shortens the reference.
How a payment reference works
The payer types the reference when it makes the payment, and each system carries it to the beneficiary's bank, which shows it on the statement or in the payment data. Each system sets its own limit and format.
| System | What it carries |
|---|---|
| SEPA Credit Transfer | Up to 140 characters, structured or unstructured |
| Fedwire (ISO 20022, since 14 July 2025) | Structured extended remittance information supported |
| SPEI (Mexico) | Payment details, with a CEP proof of payment from Banco de México's system |
| Wire to Brazil | Invoice number and nature of payment, which help the recipient classify the exchange contract |
Sources: EPC 2025 SCT Rulebook, section 2.7; Federal Reserve Financial Services, Fedwire ISO 20022 FAQ; Banco de México, SPEI; Bradesco, payment orders from abroad; Resolution BCB 277. As published on 29 October 2026.
A structured reference follows a fixed format that software can read, such as a creditor reference generated by the payee. An unstructured reference is free text. Either way, the beneficiary's accounts team or software uses it to clear the open invoice.
References are short by design. A good one leads with the identifier the payee will search for, usually its own invoice number, and leaves out anything the payee does not need, such as the payer's internal codes.
Where a business meets a payment reference
A business writes a reference on every supplier payment and asks for one on every customer payment. When it is missing or vague, the receiving side cannot tell which invoice was paid, so the money sits unallocated and the payer gets a reminder for an invoice it already paid.
In some countries the reference also feeds compliance. In Brazil, the client classifies the purpose of each foreign exchange operation, so the recipient relies on the invoice number and nature of payment, and in India banks report a purpose code for each inward payment. Our guide on how long an international wire takes recommends including the invoice number and purpose on every wire to avoid compliance holds.
Good references also save time at the paying end. When a supplier says an invoice is unpaid, a reference that names the invoice lets both sides find the payment on their statements in minutes. Without one, the payer has to send a payment confirmation and the supplier's team has to search by amount and date.
Common mistakes with payment references
- Leaving it blank or writing "payment". Use the invoice number, and the purchase order number if the supplier uses one.
- Burying the invoice number. Put it first. Long references can be cut by a bank in the chain.
- One payment, many invoices, no breakdown. List the invoice numbers, or send a remittance advice by email on the same day.
- Trusting a reference change by email. A request to quote a new reference with new bank details is a common fraud pattern. Nacha reported the FBI's finding of almost $8.5 billion lost to business email compromise in three years.
Related terms and how Helm handles it
The reference travels with the beneficiary details and, where required, the purpose code. ISO 20022 lets it carry more structured data, and SEPA caps it at 140 characters.
Helm shows the rate, fee and expected arrival before you send an international payment; check the reference at the same time, before you confirm.
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Open accountQuestions
What is a payment reference?
The short text sent with a payment to tell the beneficiary what it is for, usually an invoice or purchase order number. Banks also call it remittance information.
How long can a payment reference be?
It depends on the system. A SEPA Credit Transfer allows up to 140 characters, structured or unstructured. Other systems and banks set their own limits.
What should I put in a payment reference?
The invoice number first, then the purchase order number or a short description of the goods or services. For several invoices, list them or send a separate remittance advice.
Is the payment reference the same as the purpose code?
No. The reference identifies the invoice for the beneficiary. A purpose code classifies the reason for a cross-border payment for the central bank.
What is remittance information?
The banking term for the payment reference. ISO 20022 messages can carry it in a structured form that accounting software can read.
References
- European Payments Council: 2025 SEPA Credit Transfer Rulebook, version 1.0 (EPC125-05)
- Federal Reserve Financial Services: Fedwire Funds Service ISO 20022 implementation FAQ
- Banco de México: SPEI, Sistema de Pagos Electrónicos Interbancarios
- Bradesco: Ordem de pagamento (payment orders from abroad)
- Banco Central do Brasil: Resolução BCB nº 277, de 31 de dezembro de 2022 (foreign exchange market)
- Nacha: FBI's IC3 finds almost $8.5 billion lost to business email compromise in last three years
This guide is general information for businesses, not financial, legal or tax advice. Rules, fees and timings were checked against the sources listed on the review date and may change.