What happens to $500,000 at 10% over 5 years?
If you invest $500,000 today at a 10% annual interest rate and leave it untouched for 5 years — with interest compounding annually — you end up with $805,255.00. That means your original principal earns $305,255.00 in compound interest, bringing your total return to 61.1% over the investment period.
The key driver is compounding: each year you earn interest not only on your original $500,000, but also on all the interest that has accumulated in prior years. In year one you earn $50,000.00, but by year 5 that annual interest payment grows to $73,205.00 — the same percentage applied to a much larger base.
At 10%, money doubles approximately every 7.3 years (Rule of 72: 72 ÷ 10 = 7.2). Over a 5-year horizon that translates to a 1.61x growth multiple.
These figures assume a constant 10% rate, annual compounding, and no withdrawals or additional deposits. Use the interactive calculator below to model monthly contributions, different compounding frequencies, or any custom scenario.