This New Zealand calculator finds the number of years of ownership at which buying beats renting, once the costs of owning are weighed against rent and likely house price growth. Buying has large upfront costs that take time to recover, so the break-even tells you whether your time horizon favours owning or renting. You enter the price, deposit, rates and rent, and the tool estimates the year buying pulls ahead.
A simplified model: it weighs mortgage interest and ownership costs and buying and selling costs against rent and house price growth on the full price. It ignores the deposit's opportunity cost and tax. Future growth is uncertain. Estimate only, not financial advice.
The calculator steps through each year of ownership, adding the cost of owning, which is the mortgage interest on the price plus rates, insurance and upkeep plus the one-off buying and selling costs spread out, and comparing the running total against the rent you would have paid, offset by the equity gained from house price growth. The break-even is the first year where owning comes out cheaper than renting over the period.
On a $750,000 home with a 6.5% rate, 4% price growth, $700 a week rent and $8,000 a year costs, buying might take around 6 to 8 years to beat renting. If you expect to move within a few years of that, renting could be the cheaper choice; if you will stay longer, buying wins.
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