What is an IBAN? A guide for Australians

If you've ever tried to send money to Europe or received a request for your IBAN from someone overseas, you might have been confused — because Australia doesn't use IBANs. For many Australians, the term IBAN only comes up when a relative in London or a business in Berlin asks for one to complete a transfer.

Navigating the world of international banking can feel like learning a new language. Between SWIFT codes, BSB numbers, IBANs, and account identifiers, it’s easy to get lost in the terminology.

We’ve designed our platform to make these cross-border movements simple. Whether you're sending money to family or managing global business expenses, understanding how these identifiers work ensures your money arrives safely and on time.

Read on to learn all about IBANs and what they're used for.

Understanding the International Bank Account Number

An International Bank Account Number, or IBAN, is a standardised code for identifying a bank account across national borders. The IBAN system was originally adopted by the European Committee for Banking Standards to allow for easy communication and reduce errors in cross-border transactions within the EU.

The main purpose of an IBAN is to make international transfers faster and more reliable. By using a consistent format that includes built-in validation, banks can automatically verify that the account details provided are likely correct before the money even leaves the sending institution. This reduces the risk of payments being rejected or delayed due to simple data entry errors.

While the system started in Europe, it has since expanded globally. Dozens of countries across the Middle East, North Africa, and the Caribbean now use IBANs as their primary account identification method for international payments.

Does Australia use IBANs?

The short answer is no. Australia doesn't use the IBAN system for its domestic banking network. Instead, the Australian financial system relies on the Bank State Branch (BSB) and account number system.

Because we're not a member of the IBAN system, Australian bank accounts don't have an IBAN associated with them. If an overseas sender asks for your IBAN to send money to your Australian account, you won't be able to provide one.

This difference often causes confusion for people living in IBAN-mandatory regions, who assume every bank account in the world follows the same 15–34 character alphanumeric format. You may have to explain to them that Australia remains outside this group. Instead, you'll need to give them your BSB, account number, and a SWIFT/BIC code.

IBAN vs BSB: what's the difference?

While both systems serve the same purpose — making sure money gets to the right person — they function in different ways.

The BSB system

The BSB is a 6-digit code used in Australia to identify a specific branch of a financial institution. The first 2 digits specify the bank, the third digit indicates the state, and the final 3 digits identify the unique branch location. This is followed by an account number, which identifies the individual customer's account.

The IBAN system

An IBAN is a single, continuous string of characters that contains all the necessary information to identify the country, the bank, and the specific account. It essentially wraps the local bank details into a globally recognised format.

How an IBAN is structured

One of the reasons the IBAN system is so effective is its rigid structure. While the total length varies depending on the country, the sequence of information is always the same. Here's how it looks:

• Country code: the first 2 characters are letters that identify the country where the account is held (e.g. GB for Great Britain, FR for France).
• Check digits: the next 2 digits are calculated using a mathematical formula based on the rest of the IBAN. This allows the receiving bank's system to verify the validity of the number in real-time.
• Basic Bank Account Number (BBAN): the remaining (up to 30) characters contain the local bank identifier and the individual account number.

For example, a German IBAN might look like this: DE89 3704 0044 0532 0130 00.

In this case, 'DE' is the country code, '89' are the check digits, and the rest identifies the German provider and the customer's specific account.

When do you need an IBAN for an international transfer?

Even though you don't have an IBAN for your Australian account, you'll almost certainly need to use one if you're sending money overseas from Australia to certain regions.

Most European countries, including those in the Eurozone and the UK, require an IBAN for all incoming international transfers. If you attempt to send money to these countries using only a local account number, the transaction will likely be rejected by the receiving bank, often resulting in fees and significant delays.

Countries where an IBAN is mandatory

If you're sending money to any of the following regions, you must ensure you have the recipient's IBAN:

• The EU and EEA: all member states require an IBAN for transfers
• The UK: even after Brexit, the UK remains a core part of the IBAN network
• The Middle East: countries such as the United Arab Emirates, Saudi Arabia, and Jordan have adopted mandatory IBAN usage
• North Africa and the Caribbean: many nations in these regions, such as Tunisia and the British Virgin Islands, now use the system

If the IBAN you provide is incorrect, you might be able to get your transfer reversed, but the banks involved may deduct processing fees from the original amount. We recommend confirming the exact IBAN with the person you're paying before you make a transfer.

Sending money overseas with Revolut

We’ve simplified the process of making international payments. With a Revolut multi-currency account, you can hold and exchange dozens of currencies all in one place.

And, instead of worrying about different banking formats, our app guides you through the process to ensure you’re providing the right information for whichever country you're sending money to.

If you're sending to Europe, we'll clearly ask for the IBAN of the person you're paying. If you're sending to the US, we’ll ask for a routing number. The process is clear and intuitive, so you don't have to worry about forgetting anything.

Benefits of using Revolut for international transfers

• Competitive rates: exchange your Australian dollars into foreign currency at competitive rates. Weekend and plan limits apply.
• Speed: many of our transfers arrive within minutes, depending on the destination and currency.
• Upfront pricing: we're upfront and honest about any fees we do charge. You'll see exactly how much the recipient will get and what the exchange rate is before you confirm the payment.
• Security: we use advanced fraud detection and high-level encryption to protect your money every step of its way.

For more information on how to move your money, check out our guide to the best ways to send money overseas.

How to get started with Revolut

If you're looking for a better way to manage your international finances, joining us is simple. Here's how it works:

1. Download our app: find us on the App Store or Google Play and open your account in minutes
2. Verify your identity: follow the prompts in-app to complete our secure identity check
3. Add money: you can make a transfer from another Australian account or use a debit card to put money into your account
4. Start sending: navigate to the Payments section, select the country you're sending to, and we'll tell you exactly what details you need to complete your transfer

The information provided is accurate as of 8 May 2026.