Lumpsum Calculator
Find out what a one-time investment will be worth at a given rate of return, with a year-by-year growth breakdown.
Enter a value that satisfies the displayed range and increment.
Enter a value that satisfies the displayed range and increment.
Enter a value that satisfies the displayed range and increment.
Invested
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Est. Returns
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Total Value
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Show year-by-year growth ▸
| Year | Est. Value | Est. Gain |
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How this lumpsum calculator works
Enter the amount you want to invest once, an expected annual return, and your holding period. The calculator compounds the amount annually: FV = P × (1 + r)t.
The rule of 72
A handy mental shortcut: divide 72 by your expected return to estimate how many years your money takes to double. At 12%, money doubles roughly every 6 years — so ₹1 lakh becomes about ₹2 lakh in 6 years, ₹4 lakh in 12, and ₹8 lakh in 18.
This arithmetic does not decide whether a lumpsum, transfer plan, deposit, fund, or any other product is appropriate. The entered return is a scenario and omits volatility, fees, taxes, and loss risk.
Methodology and limits
- Method version
lumpsum-annual-compound-v1- Class
- A / R1 (pure-math)
- Effective date
- not-applicable
- Jurisdiction
- not-applicable
- Source status
- not-required-pure-math
- Rounding
- Keep full precision for calculation; round only when formatting displayed INR values.
- Review trigger
- formula, input-contract, rounding, assumption, or methodology-copy change
Formula: FV = principal × (1 + annualRatePercent / 100)^years
Educational boundary: Scenario illustration only; the entered return is not a forecast or recommendation.
Included: One beginning-of-period amount; Constant annual compounding
Excluded: Actual market path; Fees, taxes, withdrawals, product selection or suitability
Inputs: principal (INR; 1000–100000000; default 100000, existing public route default) · annualRatePercent (percent per year; 1–30; default 12, existing public route default) · years (whole years; 1–40; default 10, existing public route default)
Outputs: invested (INR; raw calculation; displayed rounded to nearest rupee) · estimatedGain (INR; raw calculation; displayed rounded to nearest rupee) · futureValue (INR; raw calculation; displayed rounded to nearest rupee)
Assumptions: One amount is invested at the start. The entered annual return compounds once per year and remains constant.
- Educational illustration only; outputs are not forecasts, guarantees, recommendations, or personalised advice.
- Returns, rates, inflation, fees, taxes, cash-flow timing, and product terms can differ from the entered assumptions.
- Displayed rupee values are rounded only after the full-precision calculation.
Frequently Asked Questions
What is a lumpsum investment?
A lumpsum scenario starts with one amount rather than spreading contributions over time. This calculator compares only the arithmetic of that entered amount, return and horizon.
Does this decide between a lumpsum and SIP?
No. It illustrates one beginning-of-period amount only. It does not compare market timing, cash-flow, volatility, fees, tax, product risk or suitability.
How does this calculator compute returns?
It uses annual compounding: Future Value = P × (1 + r)^t, where P is your investment, r the expected annual return, and t the number of years.
Is the entered return a realistic forecast?
No forecast or recommended rate is supplied. It is a user-controlled scenario; compare several values and independently consider volatility, fees, tax and loss.
How are lumpsum mutual fund gains taxed?
Tax is excluded. Treatment depends on the product, asset classification, holding dates and rules then in force; verify it independently.
Disclaimer: This calculator produces illustrative estimates only. Actual returns vary and, unless stated otherwise, results exclude expense ratios, exit loads, transaction costs, and taxes. Assumed rates are inputs, not forecasts or assured returns. This is educational content, not personalized investment advice — see our full disclaimer.