What Is a BSB Number? Compare IBAN, SWIFT, Sort Code

If you’ve ever sent money to an Australian bank account or set up a direct deposit Down Under, you’ve likely been asked for a BSB number. That six‑digit code might look cryptic at first, but it’s simply the country’s way of routing your payment to the right bank and branch, and you’ll learn exactly what it is, how to find yours, and how it stacks up against IBAN, SWIFT, and sort codes so you never get stuck on an international transfer form again.

Length: 6 digits ·
Country: Australia ·
Purpose: Identify bank and branch ·
Used in: Domestic and international transfers

The six facts below cover the nuts and bolts of BSB numbers at a glance.

What is a BSB number?

A BSB number — short for Bank State Branch — is a six-digit code used within the Australian banking system to identify a specific financial institution and its branch. As Wise (money transfer service) explains, these codes are essential for routing domestic payments such as direct debits, salary deposits, and bank-to-bank transfers.

What does BSB stand for?

• Bank — the financial institution (first two digits, e.g., 06 for Commonwealth Bank).
• State — the state or territory where the branch is located (third digit).
• Branch — the specific branch identifier (final three digits).

Some sources also expand the acronym as “Branch State Bank,” but the standard in Australian banking is “Bank State Branch,” per Tipalti (financial operations platform).

How is a BSB number structured?

A BSB is written as three digits, a hyphen, and three more digits — for example, 083-011. According to Slash (payment platform), the breakdown is:

• Digits 1–2: Bank code (e.g., 08 for National Australia Bank).
• Digit 3: State code (e.g., 3 for Victoria).
• Digits 4–6: Branch-specific number.

The implication: a BSB is a precise address for your bank branch, not your account. It tells the Australian payments system exactly where to deliver funds domestically.

How do I find my BSB number?

Finding your BSB number takes under a minute — here are the four fastest methods, each backed by how Australian banks actually serve this data.

Check your bank statement

Every Australian bank statement includes your BSB and account number near the top. Tipalti (financial operations platform) notes that the BSB is always printed alongside the account number for easy reference.

Look at your cheque book

If you still have a cheque book, the BSB is pre printed on the bottom left of each cheque, followed by your account number. This is a legacy method but still works for older accounts.

Use online banking

Log into your bank’s portal or mobile app. NAB (Australian bank) states that your BSB is displayed in the account details section under your account nickname or number.

Find via bank’s branch locator

Most Australian banks have online branch locator tools. For example, Commonwealth Bank’s BSB locator (Australian bank) lets you search by suburb or branch name to get the correct code.

The pattern: no matter which method you choose, your BSB is always one click or one paper flip away. Banks surface it prominently because every domestic transfer depends on it.

Is BSB the same as IBAN?

No — and confusing the two is one of the most common mistakes people make when sending money internationally. Here’s what each one does and why they aren’t interchangeable.

What is IBAN?

An International Bank Account Number (IBAN) is a standardized alphanumeric code used across Europe, the Middle East, and parts of Africa to identify individual bank accounts. Tipalti (financial operations platform) notes that IBANs can be up to 34 characters long and include a country code, check digits, and the domestic account identifier.

Key differences between BSB and IBAN

Six differences separate these two systems:

• IBAN is an international standard; BSB is only used in Australia.
• IBAN includes a country code (e.g., GB for United Kingdom); BSB does not.
• IBAN can be up to 34 characters; BSB is exactly 6 digits.
• IBAN identifies the specific bank account; BSB identifies the bank and branch, not the account.
• Australia does not participate in the IBAN system — per BNZ (New Zealand bank), Australia is listed as “not applicable” for IBAN.
• IBANs are used for cross-border transfers within the SEPA zone; BSBs are primarily for domestic Australian payments.

When to use BSB vs IBAN

Use BSB for any transfer to or within Australia — domestic salary, direct debit, or payment to an Australian account. Use IBAN when sending money to a bank account in a country that uses the IBAN standard (most of Europe). The two never overlap.

The trade-off: if you’re sending money from Europe to Australia, you’ll supply an IBAN from your end but the recipient will give you a BSB, not an IBAN. Mixing them up could delay the transfer by days.

Is a BSB number the same as a sort code?

Sort codes and BSB numbers share a surprising number of parallels — but they serve different countries and fit into different international frameworks.

What is a sort code?

A sort code is a six-digit number used in the United Kingdom and Ireland to identify the bank and branch of an account. Tipalti (financial operations platform) explains that sort codes are typically written in pairs with hyphens, such as 12-34-56, and are incorporated into the IBAN for international transfers.

Similarities between BSB and sort code

• Both are six digits long.
• Both identify the bank and branch, not the individual account.
• Both are required for domestic direct debits and transfers.
• Both are printed on cheque books and bank statements.

Differences

• Country: Sort codes are used in the UK and Ireland; BSB codes are used only in Australia.
• International role: UK sort codes are embedded within IBANs for cross-border payments; Australian BSBs are not part of any IBAN structure. BNZ (New Zealand bank) confirms Australia is not an IBAN country.
• Format: Irish sort codes (National Sort Codes) begin with the digit 9, a convention not used in Australian BSBs.

The catch: if you’re used to UK banking, a BSB will feel familiar — but don’t assume you can swap one for the other. A UK sort code won’t route funds in Australia, and vice versa.

Is a BSB the same as a SWIFT code?

This is the question that trips up most people sending money to Australia. The short answer is no, but the two codes often travel together.

What is SWIFT code?

A SWIFT code — also called a BIC (Bank Identifier Code) — is an 8-to-11-character alphanumeric code that identifies a bank on the international payment network. Tipalti (financial operations platform) states that SWIFT codes are essential for routing cross-border wire transfers between banks in different countries.

BSB vs SWIFT: key differences

Four differences stand out:

• SWIFT identifies a bank globally; BSB identifies a branch locally within Australia.
• SWIFT is 8–11 alphanumeric characters; BSB is exactly 6 digits.
• SWIFT is used for international transfers; BSB is primarily for domestic transfers.
• A single bank has one or a few SWIFT codes but hundreds of BSB codes (one per branch).

When you need SWIFT vs BSB

For domestic Australian transfers, you only need a BSB and account number. For international transfers to Australia, you need all three: the recipient’s BSB, account number, and the bank’s SWIFT code. BNZ (New Zealand bank) confirms this requirement. For example, NAB (Australian bank) lists its SWIFT code as NATAAU3303M, which must be paired with the recipient’s BSB and account number for incoming international wires.

One pattern across four code types: every country has its own domestic branch identifier. The difference lies in whether that identifier is rolled into an international standard (like sort codes into IBAN) or stands alone (like BSB).

The implication: for anyone sending money to Australia, the combo of BSB + account number + SWIFT code is your complete toolkit. Missing any one element means the payment won’t reach the right person.

“A BSB is a six-digit number that identifies banks and branches across Australia.”

— Commonwealth Bank of Australia (Australian bank)

“For international transfers to Australia, you’ll also need the recipient’s BSB and account number along with the SWIFT code.”

— BNZ (New Zealand bank)

“BSB tells you the state and branch where the account was opened.”

— NAB (Australian bank)

If you’re sending money to Australia from abroad, the rule is straightforward: collect the recipient’s BSB and account number, then add the bank’s SWIFT code. Together, these three pieces of information guarantee your payment lands in the correct account — no guesswork, no delays.

For Australians moving money overseas, the reverse is true: you’ll need the recipient’s IBAN (if they’re in Europe) or local routing code (e.g., a sort code for the UK), plus their account number and the bank’s SWIFT/BIC. BSB is your domestic key; it doesn’t unlock an international payment on its own.

For anyone managing money across borders with Australian connections, the choice is clear: understand what a BSB does and pair it with the right international code, or risk delayed payments and extra fees.

Frequently asked questions