Lumpsum Calculator
Estimate the future value of a one-time investment using expected annual return and duration.
Tax year 2026 - Updated June 2026
Lumpsum inputs
Estimated future value
₹15,52,924
From a one-time investment of ₹5,00,000 for 10 years at an assumed 12% annual return.
Invested amount
₹5,00,000
Estimated returns
₹10,52,924
Invested: 32%Returns: 68%
Annual rate used
12.00%
Duration
10 years
Growth multiple
3.11x
Inflation-adjusted estimate
₹8,67,145
Real return: 5.66%
Nominal value
₹15,52,924
Purchasing-power loss
₹6,85,779
Cumulative inflation
79.08%
Uses 6% annual inflation to show today-value purchasing power. This is still an estimate, not a guaranteed real return.
Formula used
- Annual rate = expected annual return / 100.
- Future value factor = (1 + annual rate) ^ investment duration.
- Future value = one-time investment x future value factor.
- Estimated returns = future value - invested amount.
- This assumes annual compounding and a fixed return rate for the full duration.
- Inflation-adjusted value = future value / (1 + expected inflation) ^ duration years.
- Real annual return = (1 + expected return) / (1 + expected inflation) - 1.
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Assumptions
- Assumes the full investment amount is invested at the start of the period.
- Assumes a fixed expected annual return compounded annually.
- Does not include taxes, exit loads, expense ratios, inflation, or market volatility.
- Actual investment returns can be higher or lower than the estimate.
Disclaimer
The information and calculations provided on this website are for general informational and educational purposes only. Results are estimates based on publicly available tax rules and assumptions and may not reflect your actual tax liability or take-home pay. This content does not constitute tax, legal, accounting, or financial advice. Tax laws and regulations change frequently and vary based on individual circumstances. Consult a qualified tax professional, accountant, or financial advisor before making any financial decisions.
This website is not affiliated with the IRS, HMRC, Income Tax Department of India, or any government agency.