Timing changes growth
Beginning-of-period deposits compound for one additional period. Contribution frequency and annual increases can materially change a long projection.
Goal-based compounding analysis
Project future value after growing deposits, fees, taxes and inflation.
Model contribution timing and frequency, annual step-ups, extra deposits and investment drag. Then solve for the periodic contribution required to reach a target.
Decision guide
How to interpret future value
Future value shows what a starting amount and a stream of contributions could become under a stated compounding path. It does not make an uncertain return certain.
Track the drag
Fees, taxes and inflation affect different parts of the result. The nominal account value is not the same as after-tax growth or purchasing power.
Solve from the goal
A target is more useful when the required contribution is feasible. Revisit the target, horizon and savings rate before assuming a higher return.
Returns are uneven
The model uses one smooth rate. Real markets fluctuate, and the order of returns matters when withdrawals or changing contributions are involved.
Tax is simplified
The tax input applies to positive net growth each period. Account type, realised gains, allowances and jurisdiction can produce very different results.
Use a range
Compare conservative, central and optimistic returns, then review the plan periodically rather than relying on one long-range figure.
Simple by design
Three steps to a clearer number.
Enter your details
Use realistic values in each field. You can change them anytime.
Calculate instantly
The formula runs locally, so there is no account or waiting time.
Use the result
Treat the answer as a practical estimate for your next decision.