Invest $1,000 a Month for 20 Years at 8%
Investing $1,000 per month for 20 years at 8% annual return grows to approximately $589,000.
How to use this tool
- Enter starting amount, monthly contribution, annual return rate and years in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your final balance and the full breakdown beneath it.
Calculate how $1,000 in monthly contributions accumulates into nearly $600,000 over 20 years at 8%.
Frequently asked questions
- Is the contribution added monthly?
- Yes — your monthly amount is added every month and compounds at one-twelfth of the annual rate.
- What return rate should I use?
- Long-run global stock returns have averaged roughly 7% after inflation, but future returns are not guaranteed. Try a range to see best/worst cases.