Invest $500/Month in an Index Fund for 40 Years
Investing just $500 per month for 40 years at a 7% average index fund return can yield over $1.3 million.
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.
See the incredible power of long-term index fund investing with $500 monthly contributions over 40 years.
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.