What is a sort code, and what is the sort code used for?

Where to find yours, in order of speed

1. Look at your banking app. Every UK banking app shows the sort code and account number on the account screen, usually behind a button labelled account details or share details. This is the fastest route and the only one that is guaranteed current, because it is generated from the account record rather than printed months ago.
2. Look at the front of your debit card. Most UK debit cards carry the sort code and account number on the front or back. Cards issued by app-based banks sometimes omit them deliberately, which is a design choice rather than a sign that something is wrong with the account.
3. Look at the top of a statement. A paper or PDF statement carries the pair in the header. Nationwide describes the same habit for the international form of the number: "You can find your IBAN on your monthly account statement." The domestic pair sits in the same place.
4. Look at a cheque. On a UK cheque the sort code is printed at the top right in three pairs and again along the bottom in the machine-readable band, with the account number beside it. If you still have a cheque book this is the most durable copy you own.

What the six digits actually encode

The first two digits identify the clearing bank or banking group; the remaining four narrow it down to a branch, an operating division or a sponsoring arrangement. That structure is why two codes from the same bank share their opening pair, and why a challenger bank that clears through an agency arrangement carries the sponsor's prefix rather than one of its own. It also explains a common surprise: the branch a code names may be a processing centre or a closed branch whose accounts were never renumbered, because renumbering customers is disruptive and banks avoid it.

What a sort code cannot tell you

It cannot tell you who owns an account, whether the account exists, or whether the person who sent it to you is who they say they are. Those are different checks with different answers: account existence is known only to the bank that holds it, and the name on the account is checked by Confirmation of Payee inside your own bank's payment screen. Treat a sort code as a routing instruction rather than as evidence, and treat a supplier changing their sort code by email as a reason to telephone them on a number you already had.

Sort code, IBAN and BIC are three answers to three questions

The sort code says which UK bank and branch; the account number says which account; the IBAN wraps both in an international format; and the SWIFT/BIC code says which institution to a bank abroad. Lloyds Bank draws the same boundary for its business customers, noting that the international pair is used "instead of your account number and sort code" when money crosses a border. For a payment inside the UK you will never be asked for the last two.

Questions people ask

Is a sort code the same as a routing number?

They do the same job in different countries. A sort code identifies a UK bank and branch in six digits; a US routing number identifies an American institution in nine. Neither works in the other country's system.

Why is my sort code written with dashes?

Purely convention. 04-00-04 and 040004 are the same code, and payment forms accept either. The dashes exist because six digits in three pairs are easier to read aloud and to copy without transposing.

My bank changed my sort code. Is that normal?

It happens after a merger, a brand change or a move between divisions, and the bank tells you in writing well in advance. A sort code change that arrives by text or email, with a new account number and an urgent payment attached, is the standard shape of a scam.

The same question in the other market

• Sort code checker across the index
• SWIFT code across the index
• Bank identification code across the index
• Account number across the index
• IBAN number UK across the index