SIP Calculator: Mutual Fund Returns

Initial Lumpsum Amount:
Monthly SIP Amount:
Expected CAGR:	% Annual
Investment Period:	years
Yearly Step-up SIP:	%

SIP Calculator for Lumpsum, Monthly Investment and Step-Up Growth

This SIP calculator estimates how an initial investment and regular monthly contributions could grow over a chosen period. It is built for forward planning: you can test a fixed SIP, add an existing lumpsum, increase the SIP every year and compare the total money contributed with the projected investment corpus. It does not predict a mutual fund's actual return.

Inputs used by the SIP calculator

Initial lumpsum amount is invested at the beginning of the projection.
Monthly SIP amount is the regular contribution added each month.
Expected CAGR is the constant annual return assumption used to create the projection.
Investment period sets the number of years of contributions and growth.
Yearly step-up SIP increases the monthly contribution once each year by the entered percentage.

Use the same currency for both monetary inputs. The calculator accepts pure numbers and therefore works for any currency without converting exchange rates.

Results and charts

The output separates total invested amount, estimated return earned and projected final corpus. The contribution-versus-return chart shows how much of the result comes from your own deposits and how much comes from modeled growth. The line graph shows the annual corpus path, making it easier to compare a fixed SIP with a step-up SIP over long periods.

SIP future-value formula

The starting lumpsum compounds for the full period. For a fixed monthly contribution C, monthly rate r and n months, the standard end-of-month contribution formula is:

Future value = lumpsum × (1 + r)ⁿ + C × [((1 + r)ⁿ − 1) ÷ r]

When r is zero, the contribution term is C × n. For a step-up SIP, one fixed annuity formula is not enough because the contribution changes annually. The calculator processes the months in sequence, increases the SIP at each yearly boundary and applies growth to the running balance. This produces a projection consistent with the selected step-up schedule.

What SIP actually means

A Systematic Investment Plan is a method of investing a chosen amount at regular intervals in a mutual fund scheme; it is not an asset class or a return guarantee. Regular investing can support discipline and means the same contribution buys more units when the price is lower and fewer when it is higher. This is often called rupee-cost averaging or dollar-cost averaging. It does not prevent loss or guarantee a profit.

Useful SIP planning scenarios

Retirement: test a long horizon and a contribution that rises with income.
Child education: compare the projected corpus with an inflation-adjusted education target.
Home down payment: use a return assumption appropriate for the shorter deadline and the importance of capital stability.
Existing portfolio plus new SIP: enter current invested value as the lumpsum and planned future investing as the SIP.
Salary increment plan: use step-up to model directing part of each annual raise toward the goal.
Delayed-start comparison: reduce the period to see how much a later start changes the corpus.

Choosing an expected return assumption

Do not choose a rate only because it makes the target work. Review the scheme category, Riskometer, benchmark, portfolio, expenses and investment horizon. Equity-oriented schemes can fluctuate sharply and may be unsuitable for money needed soon. Debt schemes also carry interest-rate, credit and liquidity risks. Run a conservative, central and optimistic case; build the goal around the conservative result where failure would be costly.

Step-up SIP benefits and trade-offs

A step-up can reduce pressure on today's budget while aligning contributions with future earnings. Its projected advantage comes mostly from investing more money, plus compounding on the earlier increases. It is useful only if the higher debit remains affordable. Promotions, job changes, parental leave or retirement can interrupt the schedule, so test a lower step-up or a pause scenario.

Lumpsum versus SIP

A lumpsum enters the market immediately and receives more time to compound, but it is also fully exposed to subsequent market movement. An SIP spreads entry dates and supports regular saving, but later installments receive less time to grow. The right method depends on when money is available, goal horizon, risk capacity and behavior. The calculator combines both rather than claiming one is always superior.

Taxes, costs and limitations

The projection assumes one smooth return. Actual NAV movement, sequence of returns, fund expense ratio, tracking difference, taxes, exit loads and missed installments can change the outcome. The displayed “returns earned” is a mathematical difference, not a realized taxable gain. Tax rules and scheme terms can change; verify current official documents before acting.

Frequently asked questions

Is CAGR the same as SIP return?

Not exactly. CAGR is natural for one beginning and one ending value. Actual SIP performance with dated contributions is generally evaluated using XIRR. Here, CAGR is an assumed annual growth rate for projection.

Does investing monthly remove market risk?

No. Regular investing changes purchase timing, but the portfolio can still lose value.

Should the SIP increase by the salary-increment percentage?

Only if the resulting contribution remains affordable after taxes, expenses, insurance, debt and emergency savings.

Authoritative investor resources

Investment note: Mutual fund returns are market-linked and not guaranteed. Use this projection for scenario analysis and confirm suitability with current scheme documents or a regulated adviser.

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