Return scenario desk
Investment Return Calculator
Compare future value, contributions, and return assumptions side by side. This page is most useful when you want the answer to be a scenario, not a slogan.
For background on compounding, see Investor.gov.
How Investment Return Calculation Works
The Investment Return Calculator projects the future value of your investments using compound interest. Enter your initial investment, monthly contributions, expected annual return rate, and time horizon to see how your money could grow over time, with detailed year-by-year breakdowns.
Formula
Future Value = P(1 + r/n)^(nt) + PMT x [((1 + r/n)^(nt) - 1) / (r/n)]
Key Features
- ✓Compound interest calculations with monthly contributions
- ✓Year-by-year growth breakdown with charts
- ✓Compare different return rate scenarios
- ✓Accounts for investment fees and inflation
Pro Tip
The power of compound interest grows exponentially over time. Starting just 5 years earlier can increase your final portfolio value by 30-50% due to compounding \u2014 time in the market matters more than timing the market.
Use it for comparisons
This calculator is strongest when you compare two plans with different contribution schedules or return assumptions. That shows how much of the difference comes from time and deposits rather than optimism.
Worked example
A $10,000 initial investment with $250 monthly contributions at 7 percent annual return reaches roughly $102,000 in 20 years. The deposit schedule does a lot of the work.
Practical caveats
A higher projected return is not the same as a better plan. Check taxes, fees, and downside risk before treating the projection as a forecast.
What to do next
If you want the compounding math in more detail, move to Compound Interest Calculator. If you are comparing growth against borrowing cost, check Loan Calculator.
Formula
Future value = starting amount + contributions + investment growth
Use the result as a scenario check, not a promise. Real returns depend on market path, timing, and whether you keep contributing.
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