Finance

Car Return on Investment Calculator (20 Years)

Calculate return on investment as a percentage. This car version uses a 20-year planning term as its starting point.

The Return figure is the total percentage gain or loss on the amount invested over the whole 20 years, not a yearly rate: a positive figure means the final value is higher than the amount invested, and a negative figure means it is lower.

Formula

Return equals final value minus invested amount, divided by invested amount, times 100.

How it works

A positive return means the final value is higher than the amount invested.

Worked example

Amount invested $10,000, final value $15,000, term 20 years. First, the gain is $15,000 minus $10,000, which is $5,000. Using the page formula, return is $5,000 divided by $10,000, times 100, which is 50.00%. That is the total return over the whole 20 years, not a yearly rate. As an illustration only, not the output of this page, the annualised rate behind the same result is about 2.05% a year, because $15,000 divided by $10,000 is 1.50, and the 20th root of 1.50 is about 1.0205. That is a weak result once it is spread over two decades: the value would need to grow by only about 2.05% every single year, steadily, to double in 20 years. If prices in general rose faster than about 2.05% a year on average, the final $15,000 buys less than the original $10,000 did.

Who this term suits for a car owner: an owner who has kept a sought-after model for twenty years and is weighing an auction sale against passing the car to a family member, where the yearly rate shows how little the value really grew each year.

FAQs

What is a good ROI?
There is no single good figure. Compare returns over the same period and with the same risk before deciding.

Is this car 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 2.05% a year the honest way to read a 20-year 50% return?
Because the $5,000 gain took twenty years to appear. As an illustration only, the 20th root of 1.50 is about 1.0205, so the value grew by about 2.05% a year on average, which is the figure to compare with price rises over the same twenty years.

What fees or taxes could shrink a 20-year car ROI?
Selling fees, auction commission, transport, registration transfer costs and any tax on the sale, depending on your situation. This calculator counts none of them, so the cash you keep will be less than $15,000.

Is a 20-year horizon too long to judge one car?
For most cars, yes, because very few cars stay in the same condition for twenty years without major spending. A 20-year figure is useful for a sought-after classic, not for an everyday car that was replaced years ago.

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