Investment Return Calculator
Calculate gain, simple return and annualised return from entered values.
All values and rates are entered by you. No live rate is assumed.
Your result
Enter your assumptions, then calculate.
Formula and method
Net gain = final value − initial amount − contributions. Simple return divides gain by total contributed capital; annualised return is an approximation.
Worked example
The pre-filled values demonstrate the calculation only. Change every field to match the scenario you want to explore.
Limitations
This is historical arithmetic, not an investment recommendation or forecast.
Results exclude terms not entered, may differ because of rounding and should be checked against formal provider disclosures.
Practical next steps
- Run more than one rate or time scenario.
- Record fees and terms the calculator does not include.
- Compare the output with the provider’s written disclosure.
SmartMoney — A REVTEK publication · Reviewed 2026-09-23 · Educational information only · Methodology