For monthly contributions with monthly compounding and end of month deposits:
FV = P × [((1 + i)m − 1) / i]
- P = monthly contribution
- i = annual rate / 12
- m = total months
If contributions happen at the beginning of each month (annuity due), multiply the result by (1 + i).
With an annual step up s%, P increases every 12 months by multiplying by (1 + s). Total FV is the sum of each 12‑month block evaluated with the above formula. Inflation adjusted FV uses real rate rreal ≈ (1+r)/(1+π) − 1.
Results
—Month-by-Month Schedule
| # | Year | Month | Contribution | Interest | Total Contrib | End Balance |
|---|
Example scenarios
| Monthly | Years | Annual Return | Timing | Step Up | Future Value |
|---|---|---|---|---|---|
| $300 | 15 | 10% | End | 0% | |
| $500 | 20 | 12% | Begin | 2% | |
| $1000 | 10 | 8% | End | 5% |
How to use this calculator
- Enter your monthly deposit, expected annual return, and duration in years.
- Choose whether deposits occur at the end or beginning of each month.
- Optional: add an annual step up percentage to grow deposits yearly.
- Optional: add an inflation rate to see purchasing power of the outcome.
- Press Calculate to generate the schedule, chart, and export options.
All results are approximations based on constant average returns. Markets are volatile and costs or taxes are not included.
FAQs
1) What is a SIP?
A disciplined plan of investing a fixed amount at regular intervals, typically monthly, to build wealth over time.
2) End vs beginning timing?
Deposits at the beginning of the month earn one extra month of growth each period, increasing the final value relative to end of month deposits.
3) What does step up mean?
Your monthly deposit is increased by a chosen percentage every 12 months, helping align contributions with income growth or inflation.
4) Why show real future value?
It deflates the nominal future value by the inflation rate to estimate purchasing power at the end of the horizon.
5) Can I export the results?
Yes. Use the CSV button for spreadsheets and the PDF button to save a formatted snapshot including the month by month schedule.