Capital Growth Calculator
Use this calculator to estimate how much your properties will be worth in the future
NZ historical average: ~7% p.a. (varies by region)
Future Value (in 10 years)
$1,303,116
Capital Gain
$503,116
Total Return
63%
Property Value Growth
The green area shows capital growth above your original $800,000 investment
Year-by-Year Projection
| Year | Property Value | Capital Gain |
|---|---|---|
| Today | $800,000 | - |
| Year 1 | $840,000 | +$40,000 |
| Year 2 | $882,000 | +$82,000 |
| Year 3 | $926,100 | +$126,100 |
| Year 4 | $972,405 | +$172,405 |
| Year 5 | $1,021,025 | +$221,025 |
| Year 6 | $1,072,077 | +$272,077 |
| Year 7 | $1,125,680 | +$325,680 |
| Year 8 | $1,181,964 | +$381,964 |
| Year 9 | $1,241,063 | +$441,063 |
| Year 10 | $1,303,116 | +$503,116 |
Note: Property values can go down as well as up. This calculator assumes consistent growth which is rarely the case in real markets. Past performance is not indicative of future results.
How to use growth projections sensibly
A capital growth estimate is most useful for scenario planning, not prediction theatre. It helps you test how different long-term assumptions change the value of a property over time.
- Run multiple growth rates instead of relying on a single optimistic number.
- Compare short-term and long-term horizons to see how compounding changes outcomes.
- Use the result alongside rental yield, cash flow, and debt strategy rather than on its own.
What drives capital growth in practice
Real property growth is uneven. Location, supply constraints, interest rates, local employment, school zones, and market cycles all influence outcomes far more than a neat straight line.
- Different NZ regions can perform very differently over the same decade.
- Short-term flat periods can still sit inside a strong long-term trend.
- Growth assumptions should stay conservative when planning borrowing decisions.
Capital growth FAQs
What is a realistic capital growth rate in New Zealand?
There is no fixed number. Growth varies widely by region and market cycle, so it is usually smarter to test conservative, base, and optimistic scenarios rather than rely on one average rate.
Should I buy based on expected capital growth alone?
Usually no. Growth matters, but it should be weighed alongside rental yield, affordability, loan structure, and risk tolerance.
Why does compounding make such a big difference over time?
Because each year of growth builds on the previous year's value, not just the original purchase price. Over longer periods that can create a very large gap between low and high growth assumptions.
Disclaimer: This calculator provides estimates only and should not be relied upon for financial decisions. Actual loan terms, rates, and eligibility may vary. Please contact a Mortgage Lab adviser for personalised advice.
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