New Zealand bank account numbers in NZD follow a standardised format of 16 digits:
While the New Zealand format is similar to Australia's Bank State Branch, the two systems are not interchangeable.
New Zealand bank account numbers in foreign currencies vary by bank.
The origins of the format lay in the establishment of the Databank Systems Limited, a company set up by a consortium of competing New Zealand banks, to provide computing resources (development and operational) for the consortium members.[1]
Bank codes are coordinated by Payments NZ who administer the Bulk Electronic Clearing System (BECS). The scope of BECS includes direct debits, automatic payments, bill payments, and direct credits.[2] Payments NZ also administer the following payment systems in New Zealand:[3]
Account numbers are generally presented in the format:
where B is the bank number (2 digits), b is the branch number (4 digits), A is the account number (7 digits) and S are digits of the suffix (2 or 3 digits). Where a bank displays the suffix as two digits, a leading zero is added to pad the suffix to three digits; i.e. BB-bbbb-AAAAAAA-SS becomes BB-bbbb-AAAAAAA-0SS.
This format allows customers to have a single account number with differing suffixes for multiple accounts of differing types. This does not include credit card and loan products.
Bank accounts are prefixed with six digits, two indicating the bank and four which indicate the branch. The table below shows which banks are allocated which bank prefix. A current list of branches as their associated bank/branch numbers is available for download from the Payments NZ website.
| Bank name | Bank prefix | Branch range |
|---|---|---|
| ANZ | 01, 04,[4] 06 and 11 (see below) | 0001–5699 |
| BNZ | 02 | 0001–1299 |
| The Co-operative Bank | 02 | 1242, 1245–1250 (agency arrangement via BNZ) |
| Westpac | 03 | 0001–1999 |
| Heartland | 03 | |
| Kookmin Bank | 02 | Agency arrangement via BNZ |
| NZCU | 03 | Agency arrangement via Westpac |
| Rabobank New Zealand | 03 | 0001–1999 |
| China Construction Bank New Zealand | 05 | 8884-8889 |
| National Bank of New Zealand[a] now ANZ | 06 | 0001–1499 |
| National Australia Bank | 08 | 0000–9999 |
| Industrial and Commercial Bank of China | 10 | 5165—5169 |
| PostBank[a] | 11 | 5000–8999 |
| ASB | 12 | 3000–3999 |
| Trust Bank Southland[a] | 13 | 4900–4999 |
| Trust Bank Otago[a] | 14 | 4700–4799 |
| TSB | 15 | 3900–3999 |
| Trust Bank Canterbury[a] | 16 | 4400–4499 |
| Trust Bank Waikato[a] | 17 | 3300–3399 |
| Trust Bank Bay of Plenty[a] | 18 | 3500–3599 |
| Trust Bank South Canterbury[a] | 19 | 4600–4649 |
| Trust Bank Auckland[a] | 21 | 4800–4899 |
| Trust Bank Central[a] | 20 | 4100–4199 |
| Trust Bank Wanganui[a] | 22 | 4000–4049 |
| Westland Bank[a] | 24 | 4300–4349 |
| Trust Bank Wellington[a] | 23 | 3700–3799 |
| Countrywide[a] | 25 | 2500–2599 |
| United Bank[a] | 29 | 0000–9999 |
| HSBC | 30 | 2900–2956 |
| Citibank | 31 | 2800–2849 |
| Kiwibank | 38 | 9000–9499 |
| Bank of China | 88 | 8800-8805 |
The account body consists of seven digits, right adjusted and padded with zeroes if necessary. The last digit of the body is a check digit which can be validated using a modulus algorithm.[5]
The table below shows the account number suffixes as introduced by Databank Systems Limited from 1969.[1] [6]
| Type of account | Suffix |
|---|---|
| Cheque Account | 00 |
| Number 2 Account | 02 |
| Fixed Account | 03 |
| Savings Account | 30 |
| Credit Card Account | 40 |
| Thrift Club Account | 50 |
| Term Deposit Account | 81 |
Some banks (such as BNZ) include three digits of the suffix in their presentation of the number to the end customer. Other banks only show the last two digits of the suffix to the end customer. Technically, all banks have three digit suffixes, it's just that the first digit of the suffix is always 0 so it's usually ignored.