Use these free mortgage and home loan calculators to check your repayments, get a borrowing range and see your deposit as a percentage. Results are estimates only. They give you a starting point, not what a lender will offer.
Free NZ mortgage tools
This free mortgage calculator NZ toolkit works out your home loan repayments, how much you could borrow, and where your deposit sits — three calculators built on current New Zealand lending rules by a registered financial adviser.
Lender assumptions reviewed
Enter your loan amount, interest rate and term to see weekly, fortnightly or monthly repayments — then add an extra amount to see how many years and how much interest you'd save.
Indicative only
Enter your loan details once — see what you'd pay, and what paying a little extra would do.
Drag to see how much time and interest you'd save.
What you'd pay
$947
per week · principal & interest
Pay it off faster
Add an extra amount on the left to see what you'd save.
7 years
off your loan term
Balance over time
These are estimates. Want your actual numbers, properly structured?
Book a free chatFigures are indicative only and assume a constant interest rate for the full term. Actual rates change, and lenders apply their own criteria. All lending is subject to lender assessment and approval criteria. This is not financial advice.
An indicative borrowing range based on your income, dependants, deposit and existing debts. It applies the servicing test rates NZ banks currently use (around 6.85%–7.10%), standard living-cost benchmarks, LVR limits and debt-to-income caps — then tells you which of those is holding your number back.
Indicative only
Eight questions. About a minute. You'll get an indicative borrowing range and see exactly which factor is holding it back.
Before tax, including regular overtime or bonuses
Enter 0 if they're not earning
Lenders typically count around 75% of this
Savings, KiwiSaver, gifted funds or equity in a property you own
The total limit, not the balance. Limits count even when unused.
Car, personal, hire purchase, buy-now-pay-later
Indicative only · subject to lender assessment
Estimated lending
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What's setting your ceiling
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This is a rough model using one set of assumptions. Every lender scales income, debt and expenses differently — the real number is often meaningfully different in either direction. We'd love to help you work out what's actually achievable.
Book a 15-minute chatThis calculator produces an indicative estimate only. It is not an offer of finance, a pre-approval, or personalised financial advice. Figures are based on general assumptions about test rates, living costs and lending criteria, and do not reflect any particular lender's policy. Actual borrowing depends on a full assessment of your income, expenses, credit history, property and circumstances. Lender approval criteria apply. Mortgage Sense, FSP1007497.
See what your savings and KiwiSaver add up to as a percentage of the property price, which lending band that puts you in, and how far you are from the next one. Owner-occupiers are generally assessed against a 20% deposit and investors 30%.
Indicative only
See what your savings add up to — and how close you are to the next lending band.
Include savings, KiwiSaver you can withdraw, gifted funds, or usable equity.
Your deposit
14.1%
Low-deposit band · lender criteria apply
To reach the next band
$50,000
more for a 20% deposit
You're there
Your deposit clears the standard 20% band.
Deposit bands are indicative. LVR limits and exemptions (including new builds and Kāinga Ora First Home Loans) vary by lender and change over time. All lending is subject to lender assessment and approval criteria. This is not financial advice.
Three worked examples using the same assumptions the calculators above apply. Every figure is indicative and subject to lender assessment.
First home, two incomes
~$480,000
A couple earning $95,000 and $70,000 with one dependant, $120,000 saved, an $8,000 credit card limit and $450 a month in other loan repayments. Their income would service closer to $960,000, and the DTI cap sits near $990,000 — but at 80% LVR their deposit only supports about $480,000. Deposit is the binding constraint, so more savings moves this number far more than a pay rise would.
Repayments on $650,000
$947 / week
A $650,000 loan at 6.5% over 30 years costs about $947 a week, and roughly $828,000 in interest across the full term — more than the loan itself. Total repaid comes to about $1.48 million.
Adding $100 a week
7 years earlier
On that same $650,000 loan, paying an extra $100 a week clears it around seven years early and saves roughly $225,000 in interest. Fixed-rate portions usually cap extra repayments before break costs apply, which is why loan structure matters as much as the extra payment itself.
They're indicative. Each lender runs its own servicing rates, living-cost benchmarks and policies, and those change often. These tools show the shape of your situation — the exact numbers come from a full assessment against live lender criteria.
Banks stress-test your repayments at a servicing rate above the actual rate, so they know you could still afford the loan if rates rise. It's why your borrowing power is usually lower than a simple repayment calculation suggests.
Often, yes. Banks have limited room for low-deposit lending to owner-occupiers, new builds are typically exempt from LVR limits, and Kāinga Ora First Home Loans allow eligible buyers in from 5%. Which path fits depends on your situation — subject to lender assessment and approval criteria.
Fixed-rate loans usually cap how much extra you can pay before break costs apply, while floating portions are fully flexible. The right structure often mixes both — that's exactly the kind of thing an adviser sets up for you.
A $650,000 home loan at 6.5% over 30 years costs approximately $947 per week on a principal and interest basis, with total interest of around $828,000 over the full term. Paying an extra $100 per week would clear the loan roughly seven years early and save about $225,000 in interest. Figures are indicative and assume a constant interest rate.
As at August 2026, New Zealand banks typically assess home loan servicing at a test rate of roughly 6.85% to 7.10% — well above advertised rates — so they can be confident you could still afford repayments if rates rose. Lenders also apply living-cost benchmarks, assess credit card limits at around 3% of the limit per month whether used or not, and shade rental income to about 75%.
In most cases nothing — the lender pays the adviser on settlement. You get someone comparing 30+ lenders on your behalf, at no cost to you. Full details are in our disclosure information.
These calculators apply publicly available New Zealand lending rules. The primary sources are listed below so you can check them yourself.
Mortgage Sense is a trading name of Yatin Kainth, a Financial Adviser registered on the Financial Service Providers Register under FSP1007497. These calculators provide indicative estimates only and do not constitute personalised financial advice. All lending is subject to individual lender assessment and approval criteria. Lender policy, test rates, LVR limits and DTI settings change over time; figures shown were reviewed in August 2026.
A free, no-pressure chat with Yatin — get your actual borrowing position, properly structured, across 30+ lenders.
Book a free chatFinancial Adviser registered on the FSPR · FSP1007497 · All lending subject to lender assessment and approval criteria.
Start with the repayment tab. Enter your loan size, interest rate and term. You will see your weekly, fortnightly and monthly repayments straight away. For a full breakdown, use the dedicated mortgage repayment calculator.
Next, try the borrowing tab. Banks don’t lend on today’s rate. Instead, they test you at a higher rate to make sure you can cope if rates rise. That is why your borrowing limit is often lower than you expect. For an estimate that includes your living costs and debts, use the borrowing calculator NZ, and read how much can I borrow to see how banks work out your limit.
Finally, check the deposit tab. Most banks want 20% for an owner-occupied home. However, some first home buyers can get in with 5% to 10%. Try the home loan deposit calculator, or see our guide to low deposit home loans.
The borrowing tab gives you a quick range. It starts with your income, dependants, deposit and debts, then applies a higher test rate, a living-cost allowance and a debt-to-income cap, similar to the way lenders assess a loan. It is an estimate, and each lender uses its own settings. For the full version with more detail, use the borrowing calculator. To see how banks work out your limit, read how much can I borrow in NZ.
Borrowing power is what a bank may lend. Affordability is what you are happy to repay. Use the repayment and borrowing tabs together. Work out the repayment on the amount you could borrow, then compare it with your real weekly budget. Many people choose to borrow less than the maximum so they have room if rates rise. Our mortgage affordability calculator covers the affordability check in more detail, and the mortgage repayment calculator shows weekly, fortnightly and monthly repayments.
Change the interest rate in the repayment tab to see what a lower or higher rate does to your repayments and total interest. It works as a simple home loan calculator, so you can test a shorter or longer fixed term, or see how a rate change affects your budget. It uses a constant rate, so treat the result as an estimate. For extra payments and a worked example, use the mortgage repayment calculator, and for the deposit side see the deposit calculator.
No. You enter the rate yourself. Current advertised rates change often, so check them with your lender or ask us for today’s options.
A pre-approval. A calculator is a good guide, but only a lender assessment uses your real credit file, spending and policy. We can arrange pre-approval, and we explain how we are paid up front.
It uses the standard loan repayment formula: a constant interest rate, equal repayments, and principal and interest only. Real loans can change when your fixed term ends, and fees or insurance are not included. Treat the result as an estimate.
A calculator runs one set of assumptions on the numbers you type in. A lender also looks at your credit history, spending, how long you have had your income and its own policy. The how much can I borrow guide explains the main differences.
No, but many lenders prefer it. With less than 20% you can still borrow, though there are fewer lenders and you may pay a low equity margin. See low deposit home loans and try the deposit tab.
An estimate comes from numbers you enter. A mortgage quote is built from your own file after a lender or adviser checks it. Our guide to getting a mortgage quote in NZ explains what you need.
A calculator gives you a starting point. It can’t see your credit history, your spending, or each bank’s own policy. Because of this, two people with the same income can get very different answers.
That is where an adviser helps. We compare lenders for you, our first chat is free, and we explain how we are paid. Get in touch and we will check your real numbers, or see how to get a mortgage quote in NZ. Every calculator we offer is listed on our mortgage tools page.