How to use this calculator
- Enter starting amount, monthly contribution, nominal annual rate (%), number of months, contribution timing.
- 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
Returns are an editable constant nominal annual scenario, divided by 12; actual investment returns fluctuate. Monthly contributions stay constant. No fund fees, taxes or inflation are deducted.
Worked example
Saving 100 monthly for 12 months at 0% results in 1,200, regardless of contribution timing.
What the result means
Separate your contributed money from modeled growth. A positive sample return is an illustration, not a forecast or guaranteed SIP return.
Common questions
Are SIP returns guaranteed?
No. This is a fixed-return scenario, not an estimate of a particular fund.
Why does deposit timing matter?
A beginning-of-month deposit compounds for one more month than an end-of-month deposit.
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.
Background reference: openstax.org — financial method. FinanceMath implements its own calculator.