This New Zealand calculator weighs saving a bigger deposit against likely house price movement. Waiting can build a larger deposit, but if prices rise while you save, the home costs more and your bigger deposit may not keep pace. You enter today's price, your expected price growth and how much extra you can save, and the tool shows whether waiting leaves you ahead or behind, so the timing decision is grounded in numbers rather than nerves.
This compares the deposit you would add by waiting against how much the price rises in that time. It is based on your growth assumption, not a forecast; try a range. It ignores rent paid while waiting and rate changes. Estimate only, not financial advice.
The calculator grows today's price at your expected growth rate over the months you would wait, to find how much more the home would cost. It also adds up the extra deposit you would save in that time. If your extra savings beat the price rise, waiting leaves you better placed; if the price rises faster than you save, waiting quietly costs you, because you face a higher price with a deposit that has not kept up.
On a $750,000 home growing 4% a year, waiting 12 months adds about $30,000 to the price. Saving an extra $1,500 a month adds $18,000 to your deposit. Here the price rise outpaces the saving by about $12,000, so waiting costs you, unless price growth is lower than assumed.
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