Should you buy a home in New Zealand or keep renting? The answer depends on far more than just comparing your mortgage payment to your rent. This calculator runs a month-by-month financial simulation covering property appreciation, mortgage amortisation, council rates, maintenance, and what your deposit would earn if you kept it invested instead. Enter your numbers below to find your personal break-even year.
Enter your details on the left to see your personalised break-even analysis
Most people approach the rent vs buy question by comparing their mortgage payment to their rent. This is the wrong comparison. Your mortgage payment covers both interest (a true cost) and principal repayment (which builds equity, essentially forced savings). Council rates, insurance, and maintenance add significantly to the real cost of ownership. And your deposit, if it were invested rather than used as a house deposit, would earn returns of its own.
This calculator models all of those factors simultaneously. It simulates the net worth of two people starting with identical savings: one who buys, and one who rents and invests the deposit. Each month, whoever spends less on housing invests the difference. At the end of each year, the calculator compares who has built more wealth. The point where the buyer's net worth first exceeds the renter's is your break-even year.
When you buy a home in New Zealand, your ongoing costs extend well beyond the mortgage payment. Council rates alone typically add $2,500 to $4,000 per year for an average property. Building insurance adds another $1,500 to $3,000. Maintenance and repairs, often estimated at 1% of the property value annually, can add $7,500 per year on a $750,000 home. If you are buying an apartment, a body corporate levy may add several hundred dollars per month on top of this.
There are also one-off costs when buying. Conveyancing and legal fees, a building inspection, a Land Information Memorandum (LIM) report, and mortgage registration typically add $3,000 to $4,500 to your upfront expenses. These costs reduce your starting wealth as a buyer compared to a renter.
Your deposit is the most important variable in this calculation. A $150,000 deposit, if invested in a diversified balanced fund or index fund at 6% per year, grows to approximately $268,000 in 10 years. That is the opportunity cost of using it as a deposit instead. The rent vs buy question is partly a question of whether your property will grow in value faster than your invested portfolio would.
This is why property appreciation assumptions matter so much. If property grows at 7% per year and your invested portfolio grows at 5%, buying wins convincingly. If those assumptions reverse, renting and investing can produce better long-term wealth. Use the assumption sliders in this calculator to test different scenarios for your situation.
If you have been contributing to KiwiSaver for at least three years, you can withdraw most of your balance to put towards your first home deposit. You must leave a minimum of $1,000 in the account. Both your own contributions and your employer's contributions, plus any investment returns, are eligible for withdrawal. This can significantly increase your deposit and reduce your LVR, potentially giving you access to better mortgage rates.
To be eligible for the KiwiSaver first home withdrawal, you must be buying a home you intend to live in, the property must be in New Zealand, and it must be your first property purchase (or you must be in a similar financial position to a first home buyer as assessed by Housing New Zealand). You apply directly through your KiwiSaver provider, and the funds are sent directly to your solicitor on settlement day.
Note that the First Home Grant, which previously provided a cash grant of up to $10,000 for first home buyers, was permanently closed in May 2024 and is no longer available.
Your LVR (loan-to-value ratio) is the size of your mortgage as a percentage of the property value. If you buy a $750,000 home with a $150,000 deposit, your LVR is 80%. This matters because the Reserve Bank of New Zealand (RBNZ) uses LVR restrictions to limit high-risk lending. Most NZ banks require owner-occupiers to have at least a 20% deposit (LVR of 80% or less). If your LVR is higher than 80%, you may face additional fees, higher interest rates, or difficulty getting approved.
The First Home Loan scheme, available through select lenders including Kiwibank, Westpac, and ANZ, allows eligible first home buyers to borrow with as little as a 5% deposit. Income and purchase price caps apply, and the criteria vary by region. Your mortgage broker or bank can confirm whether you qualify.
Based on typical NZ inputs (a $750,000 property with 20% deposit, monthly rent of $2,500, mortgage rate of 6.5%, and property growth of 4.5%), buying typically becomes the financially superior choice at around the 7 to 10 year mark. This varies significantly depending on the gap between your mortgage cost and your rent, the rate of property appreciation in your area, and what returns you can earn on an invested portfolio.
Buying becomes better sooner when rent is close to (or greater than) the full cost of ownership, when property values are rising faster than investment returns, and when you have a large deposit reducing your mortgage. Renting remains better for longer when monthly ownership costs are significantly higher than rent, when investment returns are strong, or when you do not plan to stay in the property for long.
Transaction costs mean buying almost always looks worse in the first few years. Building inspections, LIM reports, legal fees, and mortgage registration costs are incurred on day one and take time to recoup through equity growth.
In most New Zealand cities, the monthly cost of owning a home is higher than renting an equivalent property. A $750,000 home with a 20% deposit at 6.5% interest has a mortgage payment of around $3,800 per month, plus rates, insurance, and maintenance bringing the total to approximately $5,200 per month. A similar rental property might cost $2,500 per month. However, the mortgage payment builds equity and the property appreciates in value over time, which changes the long-term picture. Renting is cheaper month-to-month for most people; buying builds more wealth over the long term in most scenarios.
Most NZ banks require at least a 20% deposit to approve a standard home loan without additional restrictions. On a $750,000 property that is $150,000. First home buyers may be able to borrow with as little as 5% through the First Home Loan scheme (eligibility criteria apply), though a 10% to 20% deposit is more realistic for most buyers. A higher deposit reduces your LVR and can give you access to better interest rates.
Yes. If you have contributed to KiwiSaver for at least three years, you can withdraw your balance (minus $1,000) for a first home purchase in New Zealand. Both employee and employer contributions are eligible. You apply through your KiwiSaver provider and the funds go directly to your solicitor at settlement. The process typically takes two to three weeks.
Beyond the deposit, buyers in NZ typically face $3,000 to $4,500 in upfront costs (legal fees, building inspection, LIM report, mortgage registration), plus ongoing annual costs including council rates (typically 0.3% to 0.6% of property value), building insurance ($1,500 to $3,000), and maintenance (estimated at 1% of property value per year). Apartment buyers also pay body corporate levies. These costs are invisible in a simple mortgage vs rent comparison but are included in this calculator.
This depends heavily on your specific situation, but for a typical NZ buyer with a 20% deposit and property appreciating at 4.5% per year, buying tends to produce a higher net worth than renting from around year 7 to 10. If rent is closer to the cost of ownership, or property appreciation is higher, the break-even can come much sooner. Run the calculator with your specific numbers to find your break-even year.
If you plan to sell within five years or fewer, renting is often better financially due to the transaction costs on both entry (buying) and exit (selling, including agent commissions of 2.5% to 3.5% of the sale price plus legal fees). Short holding periods make it very difficult for property appreciation to cover these costs. The calculator uses a time horizon to model this, but does not currently include selling costs, which would push the break-even year out further for short holds.
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