Synthetic QA data · GB

United Kingdom test IBAN numbers

Ten checksum-valid United Kingdom test IBANs with their domestic bank code, sort code and account number, ready for a payment form, fixture or unit test, plus invalid GB cases that a correct validator must reject.

Synthetic only: the bank code may belong to a real United Kingdom bank, but each account number is random. Never use these values for payments or to represent a real account.

22characters
GBcountry code
18BBAN characters
YesSEPA country
Generate more GB IBANs Download CSV Download JSON

Valid United Kingdom test IBANs

IBANBank codeSort codeAccount numberBank (public registry)
GB29 PAED 1757 1130 9530 08 PAED 175711 30953008 PAYSEND PLC, Kirkcaldy
GB02 BOFA 6984 0857 7937 58 BOFA 698408 57793758 BANK OF AMERICA, N.A. LONDON, Bromley
GB21 VEBA 6949 9612 7268 16 VEBA 694996 12726816 NOVEBA LIMITED
GB16 CLYD 0180 9739 5769 03 CLYD 018097 39576903 CLYDESDALE BANK PLC, Glasgow
GB25 TSBS 8834 3626 3940 16 TSBS 883436 26394016 TSB BANK PLC (FORMERLY LLOYDS TSB SCOTLAND PLC), Aberdeen
GB74 TSBS 6484 6965 6296 88 TSBS 648469 65629688 TSB BANK PLC (FORMERLY LLOYDS TSB SCOTLAND PLC), Aberdeen
GB17 TSBS 2803 0290 2386 85 TSBS 280302 90238685 TSB BANK PLC (FORMERLY LLOYDS TSB SCOTLAND PLC), Aberdeen
GB64 RAPH 9040 1780 4950 53 RAPH 904017 80495053 R RAPHAELS AND SONS PLC, London
GB22 COUT 6047 3023 1752 85 COUT 604730 23175285 COUTTS & CO
GB46 BOFA 2292 8997 4693 17 BOFA 229289 97469317 BANK OF AMERICA, N.A. LONDON, Bromley

Invalid GB IBANs for negative tests

Each value is derived from the first valid IBAN above and re-checked, so the expected result is exact.

CaseInputExpected validator result
Wrong check digits GB30PAED17571130953008 Reject: MOD-97 checksum fails
Transposed BBAN digits GB29APED17571130953008 Reject: MOD-97 checksum fails
One character too short GB29PAED1757113095300 Reject: length does not match the country format
Wrong country prefix FR29PAED17571130953008 Reject: length or checksum fails for the other country
Lowercase with spaces gb29 paed 1757 1130 9530 08 Accept after normalizing case and whitespace

United Kingdom IBAN format

GB + 2 check digits + 4 uppercase letters + 6 digits + 8 digits = 22 characters. Validate the length and character classes first, then the MOD-97 checksum: move the first four characters to the end, convert letters to numbers (A=10 … Z=35) and the remainder modulo 97 must be 1.

Need rows for the same bank, city or BIC your integration talks to? The generator can target them, keep a stable seed and export 1,000 rows at a time.

curl -X POST https://ibangen.com/api/v1/generate \
  -H "X-API-Key: $IBANGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"country": "UK", "quantity": 100}'

Test against real bank structures, not just checksums

Free: 10 GB rows at a time. Pro adds bank targeting, 1,000-row batches, CSV/JSON exports and the API; Business adds exact BIC and branch targeting.

Target a United Kingdom bank Get an API key Validate an IBAN

Questions

Are these United Kingdom test IBANs real bank accounts?

No. They are synthetic GB IBANs with a correct national format and MOD-97 checksum. The bank code can match a real institution, but the account number is random and must never be used for payments.

How long is a United Kingdom IBAN?

A United Kingdom IBAN has 22 characters: the country code GB, two check digits and a 18-character BBAN (4 uppercase letters, 6 digits, 8 digits).

Can I get more United Kingdom test IBANs for a specific bank or city?

Yes. The United Kingdom generator creates up to 10 rows free. Paid plans add bank, city and exact BIC targeting, 1,000-row batches, CSV/JSON exports and the same data through the API.

Test IBANs for other countries

IBANgen provides synthetic QA data. It does not verify account ownership, balances, reachability or payment execution.