Gibraltar IBAN Format (GI) — Structure, Length & Example

The Gibraltar IBAN is 23 characters long and follows the ISO 13616 standard. Gibraltar is a British Overseas Territory that adopted IBANs as part of the broader UK adoption and is recognised as a SEPA jurisdiction. Gibratan banks process payments in both sterling (GBP) and euro, and the IBAN is required for all cross-border electronic transfers.

Gibraltar IBAN at a Glance

• Country code: GI
• Total length: 23 characters (always)
• Format: GIkk bbbb ccccccccccccccc
• BBAN length: 19 characters
• Character types: 4-letter bank code + 15-digit account number
• SEPA member: Yes, Gibraltar is included in the SEPA payment area

Gibraltar IBAN Structure Explained

1. Country Code, GI (2 characters)

The ISO 3166-1 alpha-2 code for Gibraltar. Every Gibraltar IBAN begins with GI.

2. Check Digits, kk (2 digits)

Two decimal digits computed using the MOD-97 algorithm (ISO 7064). They protect against single-digit errors and digit transpositions introduced during manual entry.

3. Bank Code, bbbb (4 uppercase letters)

A 4-letter alphabetic code that identifies the bank. In Gibraltar, this code is derived from the first four characters of the institution's SWIFT/BIC identifier. Notable banks and their IBAN bank codes:

• NWBK, NatWest (Gibraltar), the largest retail banking presence on the Rock
• BARC, Barclays Bank (Gibraltar)
• LOYD, Lloyds Bank (Gibraltar)
• JYSA, Jyske Bank (Gibraltar), a Danish bank with a strong offshore private banking presence
• ABNA, ABN AMRO (Gibraltar branch)
• RBOS, Royal Bank of Scotland International (Gibraltar)

4. Account Number, ccccccccccccccc (15 digits)

A 15-digit numeric account identifier. Gibraltar IBANs use a purely numeric account field; no alphabetic characters appear after the 4-letter bank code.

Gibraltar IBAN Example Explained

GI75 NWBK 0000 0000 7099 453

This is an example IBAN for illustrative purposes only. Do not use for real transfers.

• Country: GI (Gibraltar)
• Check digits: 75
• Bank code: NWBK (NatWest Gibraltar)
• Account number: 000000007099453 (15 digits, zero-padded)

Validate any Gibraltar IBAN at the ibanchecker.cash IBAN validator, or view the full format specification at /iban-format/gi.

How Gibraltar IBAN Validation Works

1. Country code check: The first two characters must be exactly GI.
2. Length check: The IBAN must be exactly 23 characters after removing all spaces.
3. Character type check: Positions 5–8 (bank code) must be uppercase letters A–Z; positions 9–23 (account number) must be decimal digits.
4. MOD-97 check: Rearrange the IBAN by moving the first four characters to the end, replace each letter with its numeric value (A=10, B=11 … Z=35), and compute the result modulo 97. A valid IBAN always produces a remainder of 1.

Gibraltar and SEPA

Gibraltar is included in the SEPA payment area, reflecting its close financial ties to the UK and the EU during the UK's SEPA participation period. Post-Brexit, Gibraltar's SEPA status was maintained under the Windsor Framework arrangements, with Gibraltar retaining access to European payment schemes. Key points:

• SEPA Credit Transfers to Gibraltar IBANs are processed via the standard SCT rails.
• The IBAN alone is sufficient for SEPA euro transfers; however, GBP transactions to Gibraltar accounts require the BIC and routing details.
• Gibraltar's currency is the Gibraltar pound (GIP), pegged 1:1 to sterling, many transactions are conducted in GBP.
• For non-euro, non-GBP payments, SWIFT is used alongside the IBAN.

Find any Gibraltar bank's BIC using the ibanchecker.cash SWIFT directory.

Gibraltar's Banking Sector

Gibraltar is an established offshore financial centre with a banking sector regulated by the Gibraltar Financial Services Commission (GFSC). Key characteristics:

• Offshore private banking: Several private banks and wealth management firms are domiciled in Gibraltar for tax efficiency and regulatory reasons.
• Online gaming and crypto: Gibraltar was one of the first jurisdictions to license distributed ledger technology (DLT) businesses, and many crypto exchanges hold Gibraltar banking relationships.
• Retail banking: NatWest, Barclays, and Lloyds serve the local resident and business population.

Common Gibraltar IBAN Mistakes

Confusing GI with GB (United Kingdom)

Gibraltar (GI) and the United Kingdom (GB) are separate jurisdictions with different IBAN formats. UK IBANs are 22 characters; Gibraltar IBANs are 23 characters. A UK IBAN cannot route to a Gibraltar bank.

Wrong Length, 22 or 24 Characters

A 22-character IBAN is a valid UK IBAN. A 24-character string is not a valid Gibraltar format. Gibraltar IBANs are always exactly 23 characters.

Lowercase Bank Code

The 4-letter bank code must be uppercase. Lowercase letters (e.g., nwbkinstead of NWBK) will cause validation to fail on systems that enforce strict character-type checking.

Validating Gibraltar IBANs in Bulk

Financial institutions and compliance teams vetting beneficiary accounts across multiple jurisdictions can validate Gibraltar IBANs alongside UK, Jersey, or Guernsey accounts using the ibanchecker.cash bulk checker.

Sources & References

• SWIFT IBAN Registry — Official IBAN country format specifications
• ISO 13616 — International Bank Account Number standard
• EPC SEPA Participants — Register of SEPA scheme participants including Gibraltar
• Gibraltar Financial Services Commission (GFSC) — Financial regulator of Gibraltar

Last updated: June 2026