Ireland IBAN Format, Length and Example

How to read this Ireland IBAN

• The value starts with IE, the IBAN country code for Ireland.
• The next two characters are international check digits.
• The remaining 18 characters are the country-specific BBAN section: 18 BBAN characters after the country code and check digits: a four-letter bank identifier, 6-digit branch identifier, and 8-digit account number.
• Irish IBANs can include a four-letter bank identifier in the BBAN section.
• The AIBK letters in the example remain part of the IBAN and should not be removed during normalization.

Worked example

Use the example below to compare what an invoice might show with what a payment form or validator usually receives after spaces are removed.

Input shown on page

IE29 AIBK 9311 5212 3456 78

Normalized digital value

IE29AIBK93115212345678

Expected length

22 characters

Result interpretation

Passing format checks still does not confirm a real account, owner, bank reachability, or payment success.

What the format check reviews

• Whether the IBAN starts with the IE country code.
• Whether the IBAN has 22 characters after normalization.
• Whether the value uses allowed letters and digits.
• Whether the MOD97-10 checksum is valid.

Common Ireland IBAN mistakes

• Deleting the four-letter bank identifier because it looks like a separate code.
• Using only domestic account details where an international IE IBAN is required.

When this page is useful

• Checking Irish payment details where both letters and digits appear in the IBAN.
• Comparing an IE IBAN with a separate BIC/SWIFT code review.
• Use the IBAN Checker after this page when you need a local checksum result for one value.

What it cannot confirm

• Format checks do not confirm that the account exists or belongs to the intended payee.
• They do not confirm bank reachability, payment readiness, or payment success.
• Use the detailed disclaimer for the full list of non-verified items.

Ireland SEPA context

The local SEPA country reference data lists this country as: SEPA country - EU. Country-level SEPA status does not confirm that a specific bank or account can receive a payment.

Limitation note

This page explains IBAN format rules only. It is not a bank, account, sanctions, fraud-risk, or payment-network check.

Before using this IBAN format for payment

A structurally valid IBAN can still be wrong for a real transfer. Always verify payment details with the invoice issuer, recipient, bank, or payment provider before sending money.

FAQ

Last reviewed: 2026-06-28 Sources: Swift IBAN Registry, European Payments Council SEPA scheme countries list Reference data is reviewed periodically. BankCodeKit does not perform live bank, account, sanctions, or payment-network confirmation.