Finance

Personal Compound Annual Growth Rate Calculator (25 Years)

Calculate compound annual growth over a period. This personal version uses a 25-year planning term as its starting point.

What this means: the CAGR is the single steady yearly rate that would turn the starting value into the ending value over 25 years, so it summarises the whole period as one average yearly pace rather than showing each separate year.

Formula

CAGR equals ending value divided by starting value, to the power of one over years, minus one.

How it works

CAGR smooths growth into a single yearly rate, even if actual yearly growth varied.

Worked example

Starting value $10,000, ending value $20,000, term 25 years. First, the growth ratio is $20,000 divided by $10,000, which is 2.00. Using the CAGR formula, the rate is 2.00 to the power of one over 25, minus one, which is 2.81% a year. Check it back: $10,000 times 1.0281 to the power of 25 is about $20,000. Total growth is $10,000, or 100% over 25 years, yet the yearly rate is only 2.81%, because a quarter of a century of compounding turns a small yearly rate into a doubling.

Who this term suits for a person: A 25-year term suits a person planning across a working life, for example a pension started in their thirties, a long family savings plan, or a fund meant to outlast several jobs. A 2.81% yearly rate shows how patient money can be, but it also shows how much of the result depends on staying invested and on keeping fees low for 25 years.

FAQs

What does CAGR mean?
CAGR is the steady yearly growth rate that would take a starting value to an ending value.

Is this personal calculator exact?
No, it is an estimate for planning only, based on the numbers you enter.

Are these figures financial advice?
No, they are estimates for planning only, not financial advice. Check with a qualified adviser for decisions involving large sums.

Why is 2.81% still enough to double money in 25 years?
Because compounding runs for 25 years. Even a 2.81% yearly gain, reinvested every year, multiplies the starting sum by 2.00 over 25 years. The longer the term, the lower the yearly rate needed for the same doubling, which is why long horizons make modest rates look powerful.

How can a 25-year CAGR mislead if I started late?
A 25-year CAGR assumes the money was invested for the full 25 years. If money was added late, withdrawn early, or left in cash for part of the period, the true personal rate will differ from 2.81%. The calculator measures the fund, not the saver's own timing, unless the starting and ending values already reflect it.

What happens to a 25-year CAGR if I withdraw money halfway?
The calculator's formula no longer applies cleanly, because it assumes one starting value growing to one ending value with nothing taken out. A halfway withdrawal lowers the ending value and the measured CAGR, even if the investment itself performed the same. A cash-flow aware calculation would be needed for that case.

Estimates only, not financial advice. Figures are approximate and do not include all fees, taxes, or changing rates unless stated.