Monzo IBAN calculator
Monzo IBANs start with GB, two check digits and MONZ, followed by your six-digit sort code and eight-digit account number. Enter your sort code and account number to get your IBAN, built in your browser; this calculator is not affiliated with Monzo.
Calculate your Monzo IBAN
Monzo IBANs carry MONZ, and Monzo gives 04-00-04 as the UK sort code in them, so the sort code is filled in for you. Enter your eight-digit account number.
Holyheld is not affiliated with Monzo. Your bank’s app or statement shows your IBAN too; if it differs from the one built here, use your bank’s.
Already have an IBAN? Check it in the IBAN checker.
Monzo IBAN format
| Detail | Value |
|---|---|
| IBAN length | 22 characters |
| Starts with | GBkk MONZ |
| Bank code in the IBAN | MONZ |
| BIC | MONZGB2L |
| Sort code | Your six-digit sort code |
| Printed format | GBkk MONZ ssss sscc cccc cc |
| Source | “your IBAN will look something like GB08MONZ04000412345678”; “040004 is your UK sort code” (31 July 2024) (monzo.com, checked 27 October 2026) |
Frequently asked questions
22 characters: GB, two check digits, the bank code MONZ, then your six-digit sort code and eight-digit account number. Printed in groups of four, it reads GBkk MONZ ssss sscc cccc cc.
04-00-04. Monzo’s own example of its IBANs reads GB08 MONZ 0400 0412 3456 78 and names 040004 as the UK sort code. Change it in the calculator only if your app shows a different one.
No. Holyheld is not affiliated with Monzo. The calculator applies the published the United Kingdom IBAN format with Monzo’s bank code MONZ, taken from Monzo’s own website. It runs in your browser and sends nothing to a server.
In your Monzo app, online banking or statements, which usually show the IBAN itself as well. If the IBAN your bank shows differs from the one built here, use your bank’s.
Paying an IBAN from stablecoins? Holyheld Business converts USDC to EUR and pays it out by SEPA. See pricing or the guide to off-ramping USDC to an IBAN.