What is a Mutual Fund Returns calculator?
A mutual fund returns calculator projects the future value of investments in mutual funds. Unlike a pure SIP or pure Lumpsum calculator, this tool lets you combine both – a one-time initial investment plus an ongoing monthly SIP – which is how most real portfolios actually look.
How to use
Three modes:
- SIP only – monthly contributions, no lumpsum. Use for pure salary-driven investing.
- Lumpsum only – one-time investment, no monthly additions. Use for a windfall or bonus.
- SIP + Lumpsum (combined) – seed with a lumpsum, then keep adding monthly. This is the real-world default.
Adjust return rate and horizon to model different scenarios.
The math (combined mode)
The calculator computes SIP and lumpsum future values independently, then sums them:
FV_total = FV_sip + FV_lumpsum
Where:
- FV_sip = P × [((1 + r)^n − 1) / r] × (1 + r)
- FV_lumpsum = L × (1 + r_annual)^n_years
Returns in Indian equity funds historically cluster around 11–13% over long periods, but individual-year returns can range from -40% to +80%. Use conservative assumptions for critical goals.
Plan reverse-engineering
A common question is: "I want ₹1 Cr in 15 years. What do I invest?"
Work backwards in the calculator:
- Set return rate to a conservative 10%.
- Set time period to 15 years.
- Adjust the SIP amount (and optional lumpsum) until Total value = ₹1 Cr.
That's your required contribution. If it's larger than your capacity, extend the horizon or accept a smaller target – don't inflate the return assumption.
Real-world caveats
- Expense ratios. 0.2% on index funds, 1% on direct active plans, 2% on regular plans. Deduct from your return assumption.
- Taxes. Equity LTCG is 12.5% above ₹1.25 L/year. Debt is taxed at slab rate (post-April 2023 purchases).
- Rebalancing. Target asset allocation shifts over time. An equity-heavy SIP may become risk-heavy 15 years in.
- Inflation. 6% long-run. ₹1 Cr in 15 years has the purchasing power of ~₹42 L today.
Related articles
- SIP vs Lumpsum: Which Actually Wins in Indian Markets?
- Index vs Active Funds: The 2026 Indian Reality
- Goal-Based Planning 101
Frequently asked questions
Which return rate is realistic? Historical Indian equity diversified: 11–13%. Historical debt: 6–7%. Gold: 8–9%. Balanced hybrid: 8–10%. Real estate: 5–8% (highly location-dependent).
Should I include employer stock or ESOPs? Only if liquid. ESOPs that are locked up or thinly traded should be valued conservatively (20–50% haircut is common).
What if I stop the SIP partway? This calculator assumes consistent SIP throughout. If you expect to pause or reduce, use a shorter time period or a lower SIP amount to stay conservative.
