Work out what a monthly mutual fund SIP could grow to, with step-up and lumpsum modes and a year-by-year table. Free, instant, nothing to install.
Who Uses SIP Calculator
Use it when: planning a monthly investment out of salary, deciding how much a yearly step-up is actually worth, comparing a lumpsum against spreading the same money across months, setting a target for a goal that is some years away, or sanity-checking a number an advisor quoted.
SIP Calculator Features
- Three modes in one — Monthly SIP, step-up SIP and one-time lumpsum, so a plan can be compared against the alternative rather than viewed alone
- Step-up SIP — Raise the instalment every year the way a salary does, with the flat-SIP figure shown beside it so the increase has something to be measured against
- Year-by-year table — Invested amount and balance for every year of the plan, which is where compounding stops being an abstraction
- Category rate presets — Debt, hybrid, index and mid cap starting points, each editable, because the right rate is the one you actually expect
- Runs in your browser — No signup, no account, and nothing you type is sent anywhere
How to Use SIP Calculator
Three inputs, and the maturity figure updates as you move them
- Pick a mode — Monthly SIP, step-up SIP, or a one-time lumpsum investment
- Set your numbers — Instalment, expected annual return, and how long you plan to stay invested
- Read the split — Maturity value, what you put in, and how much of it is growth
Frequently Asked Questions
How is SIP maturity calculated?
Each instalment is compounded for however long it stays invested, so the first one grows for the full period and the last one barely at all. The standard formula is FV = P x [((1+i)^n - 1) / i] x (1+i), where P is the monthly amount, i the monthly rate (annual rate divided by 12) and n the number of instalments. The trailing (1+i) treats the instalment as paid at the start of the month, which is how fund houses quote it.
What return rate should I assume?
Nobody knows, which is the honest answer. Long-run averages people commonly use are around 7% for debt funds, 10 to 12% for index and large cap, and higher but far less reliable for mid and small cap. Pick something you would be content with rather than something that makes the number look good, and try a lower rate too so you know what the downside looks like.
What is a step-up SIP?
A SIP where you raise the instalment by a set percentage every year, usually to track your income. Because the extra amount also compounds, a 10% annual step-up on a long plan often ends up worth far more than the extra you put in. The calculator shows the flat SIP beside it so you can see the difference rather than take it on trust.
Is SIP better than a lumpsum?
They answer different questions. A lumpsum puts the whole amount to work immediately, which wins when markets rise steadily from the day you invest. A SIP spreads the entry across months, which lowers the cost of being wrong about timing. Most people choose a SIP because they are investing out of monthly income, not because of the maths.
Does this account for tax and expense ratio?
No, and that matters. The figure here is before exit load, before the fund's expense ratio, and before capital gains tax. Equity funds held over a year attract long-term capital gains tax on the gain above the annual exemption. Treat the maturity value as a gross number and expect to keep less than it.
Why does my fund house show a different number?
Usually one of three reasons. The instalment date convention, start of month against end of month, moves the result by roughly one month of growth. Your actual SIP date and NAV allocation will not line up exactly with a clean monthly model. And a real fund does not return the same percentage every year, whereas this assumes it does.
Can I use this for ELSS or a retirement plan?
Yes, the arithmetic is the same for any monthly investment that compounds. ELSS has a three-year lock-in per instalment, which this does not model, and a retirement plan usually needs an inflation-adjusted target rather than a nominal one. Both are better planned by running the calculator at a lower real rate.
SIP calculator kaise use kare?
Pehle mode chuniye: monthly SIP, step-up SIP, ya lumpsum. Phir har mahine ka amount, expected annual return aur kitne saal invest karna hai set kijiye. Maturity value turant upar dikh jaata hai, aur neeche year-by-year table mein har saal ka invested amount aur balance dikhta hai.
How SIP returns are actually calculated
A SIP is not one investment, it is many. The instalment you pay in the first month compounds for the whole period, the one you pay in the final month compounds for barely a month, and every instalment in between sits somewhere on that slope. That is why the maturity figure is so much larger than the amount invested on a long plan, and why extending the period does more for the result than raising the instalment.
The standard formula is FV = P x [((1+i)^n - 1) / i] x (1+i). P is the monthly instalment, i is the monthly rate, which is the annual rate divided by twelve, and n is the number of instalments. The part in brackets is the future value of an ordinary annuity, and the trailing (1+i) converts it to an annuity-due, meaning each instalment is treated as paid at the start of the month rather than the end. Dropping that last term is the single most common reason two SIP calculators disagree, and it understates the result by about one month of growth.
A zero return rate is a legitimate thing to enter, and it breaks the formula, because the bracket divides by i. This calculator handles that case separately and simply returns the amount invested. It is worth trying: seeing what you would have without any growth makes the rest of the number easier to read.
Step-up SIP, and why the increase compounds too
A step-up SIP raises the instalment by a fixed percentage once a year. The idea is that your income rises, so your investment should too, and the mechanical version of that is easier to keep up than deciding afresh each year.
There is no tidy closed-form formula once the instalment changes, so this calculator walks the plan year by year. Each year is compounded forward at the monthly rate, the balance carries into the next year, and the instalment is raised before the next twelve months begin. That is slower than a single formula and it is also the only way to get the right answer without approximating.
The reason a modest step-up matters so much is that the extra amount compounds for the remaining years, not just the year you added it. A 10% annual increase on a twenty-year plan typically ends well ahead of the flat equivalent, by considerably more than the extra you contributed. The calculator shows the flat SIP figure next to the step-up one in step-up mode, so the difference is visible rather than asserted.
What this calculator does not tell you
Every number here assumes a constant annual return, and no fund delivers that. A real portfolio has years that are strongly positive, years that are flat and years that are negative, and the order they arrive in changes the outcome even when the average is identical. Two investors with the same average return over twenty years can finish with noticeably different amounts depending on when the bad years landed.
It is also a gross figure. The fund charges an expense ratio, deducted from NAV rather than billed to you, so it is easy to forget. Exiting early can attract an exit load. Equity gains above the annual exemption are taxed when you redeem. None of that is modelled here, and all of it reduces what you keep.
The most useful way to use this is not to find the number you want. Run it at a rate you would be disappointed by as well as one you hope for, and see whether the plan still works at the lower one. A plan that only succeeds at 15% is a plan that depends on something you do not control.
| Monthly SIP | Step-up SIP | Lumpsum | |
|---|---|---|---|
| Money goes in | Same amount every month | Rises a set % each year | All at once, up front |
| Timing risk | Spread across months | Spread across months | Concentrated on one day |
| Suits | Investing from salary | Income expected to rise | A bonus or maturity payout |
| Compounding period | Longest for the first instalment | Same, plus growing instalments | Full period for the whole amount |
| Main drawback | Later instalments compound briefly | Needs income to keep pace | Entry timing matters a lot |
All three are available in the calculator above, so the comparison can be run on your own numbers rather than these.
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