What is a lumpsum calculator?
A lumpsum calculator estimates how a one-time mutual fund investment could grow over a fixed period. You invest the full amount upfront rather than spreading contributions across months like a SIP.
Enter your investment amount, expected annual return, and tenure. The tool shows invested capital, estimated returns, and total maturity value. Market returns vary; use the output for planning, not as a forecast.
When does a lumpsum calculator help?
Lumpsum math is useful when you receive a bonus, inheritance, or sale proceeds and want a rough sense of long-term growth before committing capital.
- Compare a single upfront investment against spreading the same amount via SIP.
- Estimate corpus at a target date for a known lump sum today.
- Test how return assumptions and tenure change the final figure.
How do lumpsum calculators work?
This tool applies annual compounding: your principal grows each year by the stated return rate. There are no monthly cash flows—unlike SIP, which models periodic investments.
A = P × (1 + r)^t
- A
- Maturity amount
- P
- One-time investment (principal)
- r
- Annual return as a decimal
- t
- Investment period in years
Example: ₹1,00,000 at 12% p.a. for 10 years → A ≈ ₹3,10,585
Worked example
Invest ₹1,00,000 once at 12% annual return for 10 years. Using A = P × (1.12)^10, the maturity value is about ₹3,10,585—roughly ₹2,10,585 above your original principal.
The same ₹1,00,000 deployed as ₹8,333 per month via SIP would follow a different path because money enters over time. Use the <a href="/calculators/sip/">SIP calculator</a> to compare.
How to use this lumpsum calculator
Set total investment in rupees, expected annual return (p.a.), and time period in years. Results update instantly as you adjust sliders or type values.
For monthly investing instead of a single payment, use the SIP calculator. For rising SIP amounts each year, see the step-up SIP calculator.
What this calculator does not include
Expense ratio, exit load, STCG/LTCG tax, and volatility are not modeled. A constant annual return is assumed for the full tenure—real fund NAVs move up and down every year.
Frequently asked questions
Is lumpsum better than SIP?
Neither is universally better. Lumpsum exposes the full amount to markets immediately; SIP spreads entry over time. The right choice depends on cash availability, risk tolerance, and horizon.
Why use annual compounding here?
Standard lumpsum mutual fund return calculators compound the stated CAGR annually on the full principal—matching how most comparison tools present one-time investments.
Are results guaranteed?
No. All figures are illustrative estimates from your inputs. Actual returns depend on fund performance, fees, and market conditions.