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  1. #1
    Senior Moment Tony's Avatar
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    Default Question about bank account numbers

    My BNZ current account number is 02 0100 xxxxxxx 00, where the "00" prefix identifies the bank and "0100" is the branch.
    I also have a RaboDirect account, number 03 1790 xxxxxxx 01.

    AFAIK, Westpac bank also has the prefix 03, so how come if I give someone my RaboDirect number to deposit money into, it doesn't try to go to Westpac?

    In other words, what is it that uniquely identifies my account number as being RaboDirect?
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  2. #2
    Seasoned Member allblack's Avatar
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    Default Re: Question about bank account numbers

    Quote Originally Posted by Tony View Post
    In other words, what is it that uniquely identifies my account number as being RaboDirect?
    ...the following 4 digits.

    The Bank Identification Number (BIN) is 6 characters long.

    Whilst they can share the '03', what also is considered during processing is the following 4 digits. Feasibly all the banks could be '03', as long as the other 4 are not shared in any way. But as it turns out, it's not that complicated.

    Disclaimer: this info is from when I worked for a bank decades ago, but will probably still be current.

  3. #3
    pcsourcepoint
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    Default Re: Question about bank account numbers

    We had similar with Aotearoa Credit Union and Westpac. Somehow affiliated. I thought the 00 in your BNZ account represents the account type? (e.g. savings, term, cheque). So the 01 from RaboDirect would distinguish between the two.
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  4. #4
    Senior Moment Tony's Avatar
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    Default Re: Question about bank account numbers

    OK, I can see the sense in that, but according to Wikipedia, Westpac and RaboBank also share the same range of branch numbers. Maybe by agreement Westpac use one subset and Rabo another. Interestingly if you go to the Payments NZ website, they don't mention Rabo at all.
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  5. #5
    Senior Moment Tony's Avatar
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    Default Re: Question about bank account numbers

    I just noticed I had a typo in my original post. It should have been "02" not "00", for the bank id. I understand the "00" suffix to identify a bank "sub" account, i.e. current, savings etc. It is the first two characters (or 6 according to allblack) that uniquely identify the bank.
    Last edited by Tony; 20-11-2018 at 09:26 AM. Reason: finger trouble
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  6. #6
    Seasoned Member allblack's Avatar
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    Default Re: Question about bank account numbers

    The first two identify the bank, the following four the branch. But all six can come into play as a unit.

    It got more complicated when more financial institutions came on board.

  7. #7
    Senior Member piroska's Avatar
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    Default Re: Question about bank account numbers

    Ex-pctek

  8. #8
    Senior Moment Tony's Avatar
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    Default Re: Question about bank account numbers

    I saw that page, which is where I saw that Westpac and RaboBank appear to share both the bank code and the range of branch numbers - hence my initial question.
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