Goal SIP Calculator

Work backwards from your target — find the exact monthly SIP needed to reach your financial goal on time.

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Enter your goal details above to see the monthly SIP you need

How the goal SIP calculator works

A goal SIP calculator flips the usual SIP maths around. Instead of asking "what will my SIP grow into?", it asks "how much must I invest each month to reach a fixed target?". It solves the future-value-of-annuity formula for the monthly payment.

Required SIP Formula
PMT = (FV − L) × r / ((1+r)^n − 1)
Where FV = target amount, r = monthly rate (annual/12), n = total months, and L = future value of any existing lumpsum = lump × (1+r)^n. The lumpsum's growth is subtracted first so your SIP only has to cover the remaining gap.
Why add a lumpsum?
Head Start Effect
Money already invested keeps compounding for the full period. A ₹5 lakh head start at 12% over 15 years grows to ~₹27 lakh on its own — sharply cutting the monthly SIP you need.

Worked example

Suppose you want ₹1 crore in 15 years, expect 12% annual returns, and have no existing lumpsum. The monthly rate r = 12 / 12 / 100 = 0.01, and n = 15 × 12 = 180 months.

Step 1 — Growth factor

(1+r)^n = (1.01)^180 ≈ 5.996. So (1.01)^180 − 1 ≈ 4.996.

Step 2 — Apply formula

PMT = 1,00,00,000 × 0.01 / 4.996 ≈ ₹20,017 per month.

Step 3 — Check totals

You invest ₹20,017 × 180 ≈ ₹36 lakh, and compounding supplies the remaining ~₹64 lakh of your ₹1 crore goal.

Frequently asked questions

What is a goal SIP calculator?

A goal SIP calculator tells you the fixed monthly SIP amount you must invest to reach a specific target corpus by a chosen date, given an expected rate of return. It is the reverse of a normal SIP calculator, which starts from the monthly amount and tells you the maturity value.

How does the existing lumpsum input change the result?

Any amount you have already invested keeps compounding for the full period. The calculator computes the future value of that lumpsum and subtracts it from your target, so your monthly SIP only needs to bridge the remaining gap. A larger lumpsum means a smaller required SIP.

What return rate should I assume?

For long-term equity mutual funds in India, 10–13% is a reasonable assumption. Use 8–9% for hybrid or balanced funds and 6–7% for debt funds. Being conservative with the return estimate builds a safety margin into your goal plan. Past returns do not guarantee future performance.

Should I increase my SIP over time?

A step-up SIP — raising your contribution 5–10% each year in line with income growth — lets you start with a lower amount and still hit the goal, or reach a larger target. This calculator assumes a fixed monthly SIP, so treat the result as the flat amount needed without step-ups.

Is the required SIP guaranteed to reach my goal?

No. Mutual fund returns are market-linked and vary year to year. The calculator assumes a steady average return, but actual returns will fluctuate. Review your goal annually and adjust the SIP if returns run below expectations, or consider a buffer of 10–15% on the suggested amount.