Property Appreciation Calculator

Property values compound, and so does inflation. A number that looks impressive in twenty years may represent very little real gain once you account for what money will buy by then, and that distinction is what separates a genuine return from a nominal one.

This projects the value forward at your growth assumption, then discounts it back at your inflation assumption so both figures are on the table. The honest question is not what a property will be worth, but what that will buy.

The formulas

Future value = today value × (1 + growth)^years. Real value = future value ÷ (1 + inflation)^years. The doubling time is ln(2) ÷ ln(1 + growth), which is where the familiar rule of 72 comes from.

Worked example

A 400,000 property growing 4% a year is worth about 592,100 after ten years. With 3% inflation over the same period, that is worth roughly 440,600 in today money — a real gain of 40,600, or around 10% over a decade rather than the 48% the nominal figure suggests.

What this deliberately ignores

Mortgage interest, maintenance, taxes and transaction costs all reduce the real return, and none appear here. Treat the output as the value of the asset, not as profit — the profit calculation needs a capital gain calculator and honest cost records.

Frequently asked questions