Home loan borrowing calculator

Use this calculator to work out how much you might be able to borrow to buy a home, based on your income and expenses.

The results from this calculator are estimates only. Read more about how the calculator works.

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Before you start

To work out how much you could borrow, we’ll ask you a few questions about your financial situation.

It may be useful to have details about your income, liabilities and expenses handy before you start.

Privacy notice

For information on BNZ’s privacy practices, including how we collect, use and disclose your information, please see our Master Privacy Policy.

About this calculator

This calculator is a guide only. It is not financial advice or an offer of finance by BNZ. To apply for a home loan, you’ll need to complete a full application and provide more information to us. You may get a different result to this calculator. All home loans are subject to our lending criteria (including minimum equity and debt-to-income requirements), terms and fees.

How the calculator works

We’ve made some assumptions to calculate what you could borrow, including:

your situation, including your income and expenses, won’t change for the life of the loan
we may have to adjust the information you’ve given us after comparing with our internal benchmarks
we used a ‘test’ interest rate which is higher than our advertised rates, to take account of the fact that interest rates are likely to change over time.

We’ve made some assumptions to calculate your approximate repayments, such as:

there are no changes to the loan amount and you don’t borrow any extra on this loan
you don’t make any additional lump sum repayments or increase your regular repayments above the standard repayments
all your repayments are “principal and interest” and are made in full and on time
the interest on your home loan is calculated daily and charged fortnightly
the interest rate stays the same over the term of your loan (interest rates are likely to change over time).