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Mauritius SWIFT/BIC code validator

How the SWIFT/BIC code format works

Format
8 or 11-character bank identifier code, country code MU in positions 5-6
Example
MCBLMUMU

Things to watch for

  • Structure: 4-letter bank code + MU (country) + 2-character location code, plus an optional 3-character branch code
  • Mauritius's major banks happen to repeat MU as the location code too, so the letters MU can appear twice in the same 8-character BIC
  • No checksum digit — this is a format check only; it confirms positions 5-6 read MU, not that the bank or branch actually exists
Regex for SWIFT/BIC code
^[A-Z]{4}MU[A-Z0-9]{2}([A-Z0-9]{3})?$

A Mauritian SWIFT/BIC code identifies the bank on an international wire transfer into or out of Mauritius, working alongside the domestic Mauritian IBAN that identifies the account itself — Mauritius is one of the few countries outside Europe and the Middle East on the official IBAN registry. Every Mauritian BIC has MU fixed at positions 5-6, right after the 4-letter bank code, and the country’s two largest banks both use MU again as the location code, so MUMU appears at the end of their 8-character codes.

Major Mauritian bank BIC prefixes

Bank BIC Location
Mauritius Commercial Bank (MCB) MCBLMUMU Port Louis
State Bank of Mauritius (SBM) STCBMUMU Port Louis

How this validator works

This tool checks that the code is 8 or 11 characters, the first 4 characters are letters, positions 5-6 read MU, and the location and optional branch segments use only letters and digits — entirely client-side, with nothing sent to a server.

What a pass doesn’t tell you

A pass confirms the code fits the Mauritian BIC pattern, not that MCBL or STCB still names an operating bank, or that the branch suffix is current. A BIC carries no checksum digit, so a fabricated code that matches the shape still validates.

Scope: format validation only. A correctly formatted BIC says nothing about whether the accompanying Mauritian IBAN entered on the same form is valid.

SWIFT/BIC code FAQ

What's the SWIFT code format for a Mauritian bank?

A Mauritian BIC is 8 or 11 characters: a 4-letter bank code, MU fixed at positions 5-6, a 2-character location code, and an optional 3-character branch code — for example MCBLMUMU for the Mauritius Commercial Bank.

Why does MU appear twice in a Mauritian BIC?

The country code (positions 5-6) and the location code (positions 7-8) are assigned independently, and for Mauritius's largest banks both happen to read MU — one for the country, one for the registered financial centre — so the letters repeat by coincidence, not by rule.

Does an 8-character code work for a Mauritian bank?

Yes — the 8-character BIC and its 11-character form ending XXX both identify the same head office and are accepted interchangeably on wire instructions.

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