Retirement Savings Calculator: 10,000 Start, 7%, 30 Years
See how an investment grows with compound interest: final balance, total contributed and interest earned, with a year-by-year growth table.
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Result
About this tool
This page opens the compound interest calculator preconfigured for a realistic long-horizon retirement scenario: a 10,000 starting balance plus a 500 monthly contribution, growing at a 7% annual rate compounded monthly over 30 years. The final balance, total contributed and interest earned below are all computed the moment the page loads.
A 7% annual return is a commonly cited long-run average for a diversified stock-heavy portfolio, and a 30-year horizon reflects a typical working career from an early-career start to retirement age. Adding a steady 500 monthly contribution on top of the starting balance is what most real retirement plans actually look like — growth from investment returns compounding alongside growth from ongoing deposits, rather than either one alone.
The year-by-year table further down makes the compounding crossover visible: in the early years the balance grows mainly from your own contributions, but by the later decades the interest earned each year can exceed what you put in yourself. Swap in your own starting balance, contribution amount, expected return or time horizon to see how each one shifts your own retirement number.
Example. A principal of 1000 at 10% compounded once a year for 1 year, with no contribution, ends at 1100.
Limit. The annual rate cannot be negative, and an optional contribution is applied as an end-of-month deposit.