For informational purposes only. Not financial, investment, or tax advice. Results are estimates based on the inputs provided. Consult a qualified financial professional before making financial decisions.
Calculator tool
How this calculator works
Use the explanation to understand the formula, assumptions, and practical limits behind the calculator result.
What the Projection Shows
The calculator estimates future value from three moving parts: the amount invested today, recurring monthly contributions, and the annual return assumption over time.
Why Contributions and Time Matter
Compounding works on both the money you start with and the returns that remain invested. Monthly contributions matter because they add new principal repeatedly; time matters because earlier contributions compound for longer.
| Scenario | Starting amount | Monthly contribution | Years | Assumed return |
|---|---|---|---|---|
| Baseline | 5,000 | 200 | 20 | 7% |
| Higher saving | 5,000 | 300 | 20 | 7% |
| More time | 5,000 | 200 | 25 | 7% |
The calculator reports total contributed separately from investment growth so you can see how much of the ending value comes from saving versus compounding.
What the Return Assumption Hides
The annual return is modeled as a smooth average. Real portfolios can lose money in some years, recover in others, and charge fees that reduce what investors keep. A one-point fee drag compounds over decades, so expected return should be entered after considering the costs you actually bear.
Best Way to Use the Result
Run a base case, a conservative case, and a contribution-change case. If the goal only works under one optimistic return, the plan is fragile even if the calculator output looks large.
Frequently asked questions
Does this calculator predict market returns?
No. It compounds the return assumption you enter. It does not forecast future market performance, inflation, taxes, fees, or yearly volatility.
Why separate total contributions from growth?
Because they answer different questions. Contributions show how much money you personally put in; growth shows the amount added by compounding under the return assumption. That distinction makes long-term projections easier to judge.
How do investment fees affect the result?
Fees reduce the return you actually keep. A portfolio that earns 7% before costs but loses 1% to annual expenses behaves more like a 6% net-return portfolio in this kind of projection, and the long-term difference can be large.
What return should I enter?
Use a return that matches the portfolio, time horizon, and whether you want nominal or inflation-adjusted dollars. It is usually more useful to test several reasonable assumptions than to search for one perfect number.
