Contributions matter
Regular additions can drive a large share of the ending balance. Increasing contributions over time may be more controllable than trying to predict returns.
Long-term investment projection
Separate contributions, returns, fees, and inflation
Build a year-by-year scenario with regular contributions, annual contribution growth, investment fees, an inflation adjustment, and a target to measure progress against.
Plan with context
A useful projection makes its assumptions visible.
Investment outcomes are uncertain. This planner helps you compare internally consistent scenarios rather than treating one smooth growth line as a forecast.
Compounding
Returns build on prior contributions and prior gains. More time generally gives compounding more opportunity, although actual returns will vary from year to year.
Fees compound too
A recurring percentage fee reduces the balance available to earn future returns. The fee-impact comparison includes both modeled charges and lost growth.
Inflation and purchasing power
The real-value estimate discounts the projected balance by the entered inflation rate to express future money in today’s purchasing-power terms.
Targets need scenarios
If the result falls short, compare a longer horizon, higher contributions, or a gradually increasing contribution plan before assuming a higher return.
Risk is not modeled
The calculation uses a constant monthly rate. It does not simulate volatility, sequence-of-returns risk, taxes, withdrawals, or investment losses along the way.
Included
Starting assets, monthly contributions, contribution growth, modeled returns, percentage fees, inflation, a target, and annual projections.
Not included
Taxes, account limits, employer matching rules, asset allocation, market volatility, trading costs, withdrawals, or changing returns.
Use it well
Run conservative, middle, and optimistic return scenarios. Focus on the contribution level you can sustain rather than a single ending number.