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Home Loan &
Mortgage Calculator NZ
Taking out a mortgage is one of the biggest financial decisions you’ll make. Whether you are buying your first home, upgrading, or looking to refinance, our home loan mortgage calculator helps you estimate your regular repayments, allowing you to plan your budget with confidence. Simply enter your loan details below to get started.
What will my
repayments be?
Use this calculator to work out what your repayments could be for the loan or mortgage you require.

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Loan Amount ($)
Interest rate (%)
Term (years)
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Weekly Payments
$
Total Interest
$
Total cost
$
*Calculations are based on the interest rate(s) selected being constant for the entire term of the loan(s).

How to Use Our Mortgage Calculator NZ

Our home loan calculator is designed to be quick and easy to use. To get an accurate estimate of your future repayments, adjust the following inputs:
  • Loan Amount: Enter the total amount you need to borrow. If you know the property purchase price, simply subtract your deposit amount to find this figure.
  • Interest Rate (%): Input the current or expected home loan interest rate. You can test out different rates to see how potential market changes might affect your budget.
  • Loan Term: This is the total number of years you have to pay off the mortgage. The standard loan term in New Zealand is 30 years, but choosing a shorter term (e.g., 20 or 25 years) can save you thousands in interest.
  • Payment Frequency: Select from weekly, fortnightly, or monthly repayment options to match your salary cycle.

Understanding Your Mortgage Repayment Options

When structuring your home loan, the way you choose to pay it back has a major impact on your overall costs.
  • Principal and Interest (P&I): This is the most common type of home loan. Your regular repayments go towards paying off the original amount you borrowed (the principal), plus the interest charged by the bank. Over time, your loan balance decreases until it is completely paid off.
  • Interest Only: With this option, your repayments only cover the interest charges for a set period (usually 1 to 5 years). Your repayments will be lower during this time, but the original loan amount will not decrease. Once the interest-only period ends, you will switch to Principal and Interest, and your repayments will increase.

Calculator Assumptions & Disclaimer

  • The results from our home loan mortgage calculator are estimates intended for illustrative purposes only and do not constitute an offer of finance or financial advice. The calculations assume that the interest rate remains constant for the entire loan term, and that a year consists of 52 weeks, 26 fortnights, or 12 equal months.
  • These estimates do not take into account any upfront loan establishment fees, ongoing monthly account fees, or changes to standard lending criteria.
  • Please talk to our team at Buddy Mortgages for personalised advice.
Find out how much you could save by making extra loan repayments
Making even small additional loan repayments could save you thousands in interest on your loan in the long run. Get started with our calculator to find out exactly how much.
Break Cost Calculator
When you want to break your current loan agreement to refinance or repay your loan early, you might have to pay a break fee.

A break fee covers the income the bank expected to receive based on your current agreement. The amount is approximately equal to the difference between the interest the bank would have received based on your current loan, and the current market interest rate.

Get in touch with Buddy to find out if you'll have to pay a break fee and to make sure you come out on top when breaking your loan.
Current Home Loan Amount ($)
Remaining Term (years)
Current Loan Interest Rate (%)
Current Market Rate (%)
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Break cost
$
*Answers provided are estimates only. Each bank will also apply an administration fee to their break cost.

Frequently Asked Questions

How much will my mortgage repayments be?
How can I pay off my home loan faster?
What is a mortgage break fee?
How much deposit do I need for a home loan in NZ?