Multi-year cost of insurance premium increases.

A 600 annual premium rising 10% a year for 5 years costs a cumulative 3,663 — meaningfully more than the 3,000 you would expect from multiplying out the current rate. By year five the premium itself has reached 878, nearly 50% above where it started.

What the result means

Cumulative cost is what you'll pay across the period. Final-year premium shows how much it will have grown. Use this to compare a cheap but fast-rising policy against a slightly higher stable one.

Shopping around each renewal can slash the increase rate — loyalty to a single insurer often costs more than switching annually, especially for established customers.

Run it with sensible defaults

Using current annual premium of 600, annual increase rate of 10%, years held of 5, the calculation works out to 3,663.06. Nudge the inputs toward your own situation and the output recalculates instantly. The defaults are meant as a starting point, not a recommendation.

The levers in this calculation

The inputs — Current Annual Premium, Annual Increase Rate, and Years Held — do not pull with equal force. Frequency and unit price pull the total in different directions. The biggest surprise for most people is how small recurring amounts compound into large annual figures — that's where this calculation earns its keep.

How the math works

Cumulative cost is the future value of a growing annuity: premium times ((1+rate)^years − 1) divided by rate, with the first payment occurring now and compounding forward. The working is transparent — you can verify every step yourself in the formula section below. No black box, no opaque "proprietary model".

Using this without guilt

The figure here isn't a verdict on whether the spending is "worth it". That judgment is yours to make. What the number does is shift the question from "can I afford this?" to "is this what I want my money doing over a decade?". Both questions matter.

What this doesn't capture

The tool prices the money; it can't weigh the enjoyment. A coffee habit, gym membership, or streaming bundle might cost what the math says but deliver value that's harder to quantify. Use the number to make the trade-off visible — the decision is yours.