Bank of Ireland Account Number: Find Digits, IBAN & More

Few things in personal finance should be simpler than an account number — until you stare at a payment screen asking for IBAN, BIC, and sort code. Your Bank of Ireland account number is eight digits long and sits at the very end of your 22-character IBAN.

Number of digits: 8 ·
Relation to IBAN: Last 8 digits ·
Where to find: 365 Online, Mobile App, Bank Statements ·
Official source: Bank of Ireland Help Centre

Here are the key facts about Bank of Ireland account numbers and their relationship to IBAN:

The implication: your account number is embedded in your IBAN — you rarely need to type the account number alone.

How do I find my account number at Bank of Ireland?

Your account number is not hidden — Bank of Ireland provides it in several standard places. Here’s how to access it on each platform.

Finding your account number in 365 Online Banking

Log into your 365 Online account. On the account summary page, your IBAN is shown below the account nickname. The Bank of Ireland Personal Banking (official banking portal) explains: “The last 8 digits of your IBAN is your account number.” Your full IBAN appears there — just note the final eight digits.

Finding your account number on bank statements

Every Bank of Ireland statement — paper or eStatement — lists the account number on each transaction page. The Bank of Ireland Help Centre confirms that the account number appears on every transaction page of the statement. Look for the “Banking Details” section at the top right of current account statements.

Finding your account number via the mobile app

Open the Bank of Ireland App and select your account. The account number is displayed on the account summary screen. For customers in Northern Ireland and Great Britain, tap the shortened account number at the top of the app to reveal the full 8-digit number and National Sort Code in a pop-up, according to the Bank of Ireland Help Centre. Republic of Ireland customers can view their BIC and IBAN directly in the app.

The key takeaway: no matter which channel you prefer, the account number is just a tap or click away — and once you see the IBAN, the last eight characters are the digits you need.

How many digits is a boi account number?

Account number length and format

Bank of Ireland account numbers are 8 digits long. They are purely numeric. This is confirmed by the Bank of Ireland Help Centre (official bank guidance). The sort code, by contrast, is 6 digits and precedes the account number in the IBAN structure. For example, in the IBAN IE64BOFI90583812345678, the last eight digits (12345678) are the account number, and the six digits before that (905838) form the sort code, as broken down by Bank.Codes (international IBAN database).

What is the structure of a Bank of Ireland account number?

The account number has no internal structure beyond being an 8-digit number assigned to your specific account. It does not include a check digit or branch identifier. The branch is identified through the sort code alone.

What this means: with only 8 digits, there are 100 million possible account numbers — enough room for the bank’s customer base without needing extra characters.

The implication: your account number is unique only when paired with your sort code, which is why IBANs combine both.

Is my account number the last 8 digits of my IBAN?

Understanding IBAN structure

Yes. The IBAN for Bank of Ireland in the Republic of Ireland is 22 characters long, consisting of:

• 2-letter country code (IE)
• 2 check digits
• 4-character BIC/SWIFT code (BOFI)
• 6-digit sort code
• 8-digit account number

This structure is documented by Bank.Codes (international IBAN database) and confirmed by Bank of Ireland Personal Banking (official banking portal). The example IBAN given by Bank of Ireland is IE64BOFI90583812345678. Additionally, Wise (financial services platform) confirms the 22-character length for Bank of Ireland IBANs.

How to extract account number from IBAN

Simply take the last eight characters of your IBAN. If your IBAN is IE64BOFI90583812345678, the account number is 12345678. This works for all standard Bank of Ireland accounts. The Bank of Ireland Help Centre (official bank guidance) explicitly states: “The last 8 digits of your IBAN is your account number.”

The pattern: the IBAN acts as a container that packages your account number with routing information — you only need the complete IBAN for electronic transfers, but the account number alone is enough to identify your account internally.

How to see bank account number in boi?

Viewing account number in the mobile app

In the Bank of Ireland mobile app, the account number appears on the account dashboard when you select the account. For Republic of Ireland customers, both IBAN and BIC are also visible. For Northern Ireland and Great Britain customers, tapping the shortened account number reveals the full digits in a pop-up (Bank of Ireland Help Centre).

Viewing account number in online banking

Log into 365 Online, navigate to your account details, and the IBAN is displayed — the account number is the last 8 digits. The bank provides this information in both the account details and eStatements (Bank of Ireland Help Centre).

The catch: the account number itself is rarely shown as a standalone field — you almost always see the IBAN and must extract the last eight digits.

Are my account number and IBAN the same?

Differences between account number and IBAN

No, they are not the same. The account number is an 8-digit identifier for your specific account. The IBAN is a longer code — 22 characters — that includes the country code, check digits, BIC, sort code, and account number. As Bank of Ireland Personal Banking (official banking portal) explains, the IBAN is “not a new account number, but a new format for an existing account number.”

When to use which

For all SEPA (Single Euro Payments Area) transfers — including domestic euro transfers within Ireland — you must use the full IBAN. The account number alone is not sufficient for international payments. For direct debits or standing orders, the IBAN is also required. The Bank of Ireland Help Centre (official bank guidance) advises using the IBAN for all payments, not just the account number.

Why this matters: using the account number alone for an international transfer will likely result in a failed or delayed payment — the IBAN is the only standard that works across borders.

The table below breaks down the IBAN structure for Bank of Ireland accounts in Ireland:

The trade-off: the IBAN is longer and harder to type manually, but it eliminates routing errors by embedding all necessary information in one string.

Quick steps to find your Bank of Ireland account number

1. Open 365 Online or the mobile app.
2. Navigate to your account details or summary.
3. Locate your IBAN (shown under account name).
4. Copy the last 8 digits of the IBAN — that is your account number.
5. Alternatively, check a paper or eStatement; the account number appears on every transaction page.
6. If you don’t have online access, visit a branch or call Direct Services (Bank of Ireland Help Centre (official bank guidance)).

What we know for sure and what remains unclear

• Bank of Ireland account numbers are 8 digits (Bank of Ireland Help Centre).
• The account number is the last 8 digits of the IBAN (Bank of Ireland Help Centre).
• You can find it in 365 Online, the mobile app, and on statements (Bank of Ireland Help Centre).
• For SEPA transfers, you must use the full IBAN (Bank of Ireland Personal Banking).

• It is not confirmed whether the full 8-digit account number is printed on Bank of Ireland debit cards.
• Whether the account number is identical across all account types (current, savings) is not publicly stated.

What Bank of Ireland says about your account number

“The last 8 digits of your IBAN is your account number.”

— Bank of Ireland Help Centre, What is my account number? (official bank guidance)

“An IBAN is not a new account number, but a new format for an existing account number.”

— Bank of Ireland Personal Banking, BIC and IBAN explained (official banking portal)

“A Bank of Ireland IBAN in Ireland consists of 22 characters.”

— Wise (financial services platform)

The bottom line on Bank of Ireland account numbers

For any Bank of Ireland customer sending or receiving money, the distinction is clear: use your full IBAN for all electronic transfers, or risk delays. The account number remains essential as the last eight digits of that IBAN, but never use it alone for payments. Check your app or statement once to memorise it — you’ll need it every time you set up a new payee.

Related reading: How to find your Bank of Ireland BIC and IBAN · Bank of Ireland BIC and IBAN explained

For a broader understanding of how your account number fits into international payments, see this comprehensive IBAN number guide.

Frequently asked questions

Related reading: How to find your Bank of Ireland BIC and IBAN · Bank of Ireland BIC and IBAN explained