Mutual Fund Calculator
Estimate a mutual fund's maturity value, total contributed and gains with compounding, using a monthly SIP or a one-off lump-sum investment.
Input Data
Results
At a glance:A mutual fund compounds your money over time. SIP (end-of-month annuity): future value = PMT × ((1 + r/12)^(12t) − 1) ÷ (r/12), where PMT is the monthly amount. Lump-sum: future value = PV × (1 + r)^t with annual compounding. Gains = maturity value − total contributed.
Formula
SIP: future value = PMT × ((1 + r/12)^(12 × years) − 1) ÷ (r/12).
Lump-sum: future value = PV × (1 + r)^years.
Gains = future value − total contributed.
$$FV_{SIP} = PMT \cdot \dfrac{(1+\frac{r}{12})^{12t}-1}{\frac{r}{12}}$$$$FV_{lump} = PV (1 + r)^{t}$$How to Use
- Choose SIP (monthly) or lump-sum.
- Enter the amount, annual return and years.
- Read the maturity value, total contributed and gains.
FAQ
What is the difference between SIP and a lump-sum investment?
SIP (systematic investment plan) puts a fixed amount in every month, using dollar-cost averaging to spread the timing risk of entering the market. A lump-sum invests the whole principal at once, enjoying a longer compounding period. Each has pros and cons depending on your cash flow and market conditions.
Is the result a guaranteed return?
No. Mutual fund returns fluctuate and are not guaranteed; this calculator only estimates using the fixed annual return you enter. Actual returns are affected by the market, fees and currency. Use it for planning reference only.
When in the month is the SIP contribution made?
This calculator uses the end-of-month annuity convention — the monthly contribution is invested at month-end. This is a common SIP assumption; if your plan contributes at the start of the month, the actual maturity value will be slightly higher.
What is the difference between a mutual fund, an ETF and individual stocks, and where should a beginner start?
A mutual fund, an ETF and a single stock are three common vehicles, and understanding the difference helps you pick the right one. A mutual fund pools many investors' money managed by a professional fund manager into a basket of stocks, bonds, etc. Its strengths are one-step diversification, professional management and a low entry barrier (small regular investments); its weakness is higher fees — active funds often charge a subscription/sales fee, an annual management fee (expense ratio) and sometimes a redemption fee, and dealing is at one NAV per day, not instantly tradable. An ETF is also a basket fund but listed on an exchange and tradable like a stock, with real-time pricing. Most ETFs passively track an index (e.g. the Tracker Fund, S&P 500), so fees are very low (expense ratios usually far below active funds) and transparency is high; the downside is broker commission and bid-ask spreads, and a passive ETF does not try to beat the market. A single stock is buying one company directly — highest potential return and full control, but the most concentrated risk and volatility, requiring your own research and unsuitable for inexperienced beginners. Where should a beginner start? Generally: (1) for most beginners and long-term investors, a low-cost passive index ETF is a great starting point — one sum diversifies across the whole market, at low cost, no stock-picking, and it often beats most active funds over time; (2) if you want professional management and prefer regular contributions without minding higher fees, consider a low-fee (especially index) mutual fund, and use this calculator with the Investment Fees Calculator to gauge the fee impact; (3) single stocks are best tried only after you have some knowledge and use only risk capital you can afford to lose, and always diversify. Whatever you choose, the keys to long-term investing are diversify, low cost, hold long-term, invest regularly and not be scared off by short-term swings. This calculator can estimate long-term compounding, but do factor in fees. Pair it with our Expense Ratio Calculator and Investment Fees Calculator.
Why might the fund gains shown here differ from what I actually receive?
This calculator uses a fixed annual return with steady compounding to show the long-run power of compounding, but the amount you actually get is often lower than (or different from) the figure. Understanding the gaps avoids over-estimating future wealth. First and most important: returns fluctuate, they are not fixed. A real fund's return varies year by year and month by month, with ups, downs and possible losses; a single fixed rate is a simplification, and the final outcome is also subject to sequence-of-returns risk — the same average return with a different order of ups and downs affects a continuously contributing SIP differently, which this model cannot reflect. Second, fund fees erode returns year by year — the most overlooked yet hugely impactful factor. Mutual funds commonly charge a subscription/sales fee (one-off at purchase), a management fee/expense ratio (deducted from assets annually — the most damaging because it recurs and is compounded), possibly a redemption fee and internal trading costs. This calculator uses the gross return with no fees deducted; the net return will be materially lower. For example, a gross return of 8% with a 1.5% expense ratio leaves an effective return of about 6.5%, a sizeable long-run gap. Use the Investment Fees Calculator to see the real erosion. Third, inflation erodes purchasing power — a large nominal maturity value in ten or twenty years buys far less than today; to see the real, today-equivalent outcome, use the real return (nominal minus inflation). Fourth, tax and other costs — depending on product and region, tax may apply, and cross-border funds carry currency and conversion risk. Fifth, SIP assumes end-of-month contributions, fixed and uninterrupted; pausing or withdrawing mid-way reduces the actual accumulation. Practical use: (1) treat the result as a rough magnitude and planning reference, not a precise promise; (2) use a conservative return and be sure to deduct fees for the net return; (3) prefer low-fee funds or index ETFs for better long-run net returns; (4) account for inflation and view long-run results in real terms. Pair with our Investment Fees Calculator, Expense Ratio Calculator and CAGR Calculator.
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References
Content review: Calculatorism Finance Team. Results are for reference only; please refer to the relevant authorities for the official figures.