How to use this calculator
- Enter initial savings, first annual end-year contribution, annual increase in contribution, annual effective return (%), years.
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Assumptions and limitations
End-year contributions, fixed nominal step and deterministic annual return. No contribution limits or tax rules are implied.
Worked example
For the sample inputs shown above, annual contribution step planner produces a first result of approximately 1450. The assumptions below explain what this result represents.
What the result means
Plan contributions that rise by a fixed amount each year and inspect the full annual schedule.
Common questions
How is the calculation performed?
Balanceₖ=balanceₖ₋₁×(1+r)+first contribution+(k−1)×annual step.
What does the model leave out?
End-year contributions, fixed nominal step and deterministic annual return. No contribution limits or tax rules are implied.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.