SIP Calculator
AboutEstimate the final corpus from a monthly SIP at any expected return + tenure. Toggle Adjust for inflation to see what your wealth will be worth in today's rupees. Switch to Advanced to anchor the projection to real calendar dates — when you started (or will start) the SIP and when you want it to mature.
Year-by-year schedule (15 years)
| Year # | Invested so far | Returns this year | Cumulative returns | Closing corpus |
|---|---|---|---|---|
| Y1 | ₹1,20,000 | ₹6,825 | ₹6,825 | ₹1,26,825 |
| Y2 | ₹2,40,000 | ₹22,910 | ₹29,735 | ₹2,69,735 |
| Y3 | ₹3,60,000 | ₹41,034 | ₹70,769 | ₹4,30,769 |
| Y4 | ₹4,80,000 | ₹61,457 | ₹1,32,226 | ₹6,12,226 |
| Y5 | ₹6,00,000 | ₹84,471 | ₹2,16,697 | ₹8,16,697 |
| Y6 | ₹7,20,000 | ₹1,10,403 | ₹3,27,099 | ₹10,47,099 |
| Y7 | ₹8,40,000 | ₹1,39,623 | ₹4,66,723 | ₹13,06,723 |
| Y8 | ₹9,60,000 | ₹1,72,550 | ₹6,39,273 | ₹15,99,273 |
| Y9 | ₹10,80,000 | ₹2,09,653 | ₹8,48,926 | ₹19,28,926 |
| Y10 | ₹12,00,000 | ₹2,51,461 | ₹11,00,387 | ₹23,00,387 |
| Y11 | ₹13,20,000 | ₹2,98,572 | ₹13,98,959 | ₹27,18,959 |
| Y12 | ₹14,40,000 | ₹3,51,657 | ₹17,50,616 | ₹31,90,616 |
| Y13 | ₹15,60,000 | ₹4,11,475 | ₹21,62,091 | ₹37,22,091 |
| Y14 | ₹16,80,000 | ₹4,78,879 | ₹26,40,970 | ₹43,20,970 |
| Y15 | ₹18,00,000 | ₹5,54,832 | ₹31,95,802 | ₹49,95,802 |
Notes & references
SIP formula
- Closed-form for a constant-rate SIP:
FV = M × ((1+r)^n − 1) / rwhere M is the monthly contribution, r is the monthly rate (annual ÷ 12 ÷ 100), n is the number of months. - We compute the schedule month-by-month rather than via the closed form so v2 lumpsums + rate changes + withdrawals slot into the same loop without rebuilding the model.
Assumptions
- Monthly compounding — annual rate ÷ 12, applied to the opening balance each month before that month's deposit lands.
- End-of-month deposits — interest accrues on existing units first, then the new SIP buy adds to the corpus. Mirrors the typical Indian SIP allocation flow.
- Constant return — the calculator uses a single expected return across the full tenure. Real funds fluctuate; treat the number as a long-run-average projection, not a guarantee.
- Real value — when "Adjust for inflation" is on,
real = nominal / (1 + i)^yearsusing the inflation rate you specify.
Not modelled (yet)
- Lumpsum injections — one-time, quarterly, or yearly extra deposits.
- Mid-tenure rate changes — switching expected-return assumptions partway through.
- Partial withdrawals — pulling money out mid-tenure (SWP).
- Taxes — equity LTCG (10% over ₹1L), STCG (15%), debt fund slab tax.
- Step-up SIPs — annual percentage hike to the monthly amount.
Frequently asked
How is SIP return calculated?
Each monthly contribution earns compounded growth at the expected annual return. We model it as monthly compounding (annual rate ÷ 12) with end-of-month deposits, which mirrors how Indian AMCs allocate units on the SIP date.
Is monthly SIP better than a one-time lumpsum?
For volatile equity markets, monthly SIPs spread your cost basis (rupee-cost averaging) and remove the timing decision. A lumpsum at a market low can outperform a SIP, but you rarely know it was a low until later. SIPs are the safer default for most retail investors.
What is a realistic expected return for an Indian SIP?
Long-term equity mutual funds in India have historically averaged ~11–13% CAGR over rolling 15-year windows. Hybrid / debt funds run lower (7–9%). The default 12% used by this calculator is an equity-heavy assumption — adjust it for your fund mix.
How does inflation affect my final corpus?
A ₹1 cr corpus 25 years from now is worth a lot less than ₹1 cr today. Toggling "Adjust for inflation" deflates the final value back to today's rupees using the inflation rate you enter (default 6%, roughly India's long-run CPI), so you can compare it to expenses you can imagine right now.
Are taxes included in the projection?
No — the corpus shown is pre-tax. For Indian equity mutual funds, gains over ₹1 lakh per financial year are taxed at 10% (long-term) or 15% (short-term, if redeemed within a year). Subtract roughly 10% of "Wealth gained" for a rough post-tax number on equity SIPs.
Is my data saved if I refresh the page?
Yes. All inputs (contribution, return, tenure, inflation toggle + rate) are persisted in your browser's localStorage. Come back tomorrow and it's still there. Clearing site data resets to the defaults.
Persistence
- All your inputs are saved to your browser's localStorage under the key
chorecrush:sip-calculator:v1. Refresh the page or come back tomorrow — they're still there. Clear it from your browser settings if you want a clean slate.
For illustrative purposes only. Mutual fund returns are not guaranteed and past performance is no indicator of future results. Verify any number with your financial advisor before investing.