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Lumpsum Calculator 2026

A lumpsum here is one deposit compounded monthly. Future value is P × (1 + r/12)^(12 × years). The rate stays constant, and no further deposits are added.

Disclaimer: This calculator shows a simplified projection based on constant return assumptions. Actual market returns vary and may be higher or lower. Use it for planning, not guarantees.
INR
%
years

Total Maturity Value

₹8,25,096.72
Total Gain₹5,75,096.72
Growth Multiple3.30x
Rule of 72~6.0 years to double

₹2,50,000 at 12% for 10 years finishes near ₹8,25,097. The gain is about ₹5,75,097, about 3.30 times the principal. The Rule of 72 line is 72 ÷ 12 = 6.0 years. Doubling at 1% a month is about 5.8 years.

Starting example at 12%

Monthly compound

  • ₹2,50,000 at 12% for 10 years finishes near ₹8,25,097.
  • The gain is about ₹5,75,097. The growth multiple is about 3.30.

Rule of 72

  • The on-screen estimate is 72 divided by the annual percent. At 12% that is 6.0 years.
  • Doubling under the monthly formula, at 1% a month, takes about 5.8 years. The page does not print that second figure.

Financial & Tax Advice Disclaimer

This tool is provided strictly for educational, planning, and illustrative purposes. All figures, estimates, compounding formulas, and tax calculations are based on user input parameters and current mathematical models.

No Performance Guarantee & Liability: Output calculations do not guarantee future returns, exact bank interest payouts, market gains, or legal tax liability. Toolioz and its maintainers accept no legal or financial liability for investment losses, loan commitments, or tax penalties resulting from the use of this calculator.

Always consult a certified financial planner, registered investment advisor, or Chartered Accountant (CA) before taking financial action.

Long-term growth is one monthly compound path

The frequency is fixed at 12. Tax and an expense ratio are not subtracted.

What is included

  • -One principal, compounded every month.
  • -No extra deposits during the term.

What is left out

  • -A market drop is not modeled. The rate stays at the number entered.
  • -Tax and an expense ratio are not subtracted. A SIP comparison is not calculated.

Useful inputs to test

  • -Compare 8 percent, 10 percent, and 12 percent return scenarios.
  • -See how adding even 2 to 3 extra years changes the final corpus.
  • -Check how the growth multiple changes if you start with a larger corpus.
  • -The result is a constant-rate projection. It is not a fund recommendation.

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Frequently Asked Questions

One principal compounded monthly until the end of the term. No further deposits are added, and the annual rate stays constant.

Monthly only. Future value is P × (1 + r/12)^(12 × years). It is not P × (1 + r)^years.

No. A monthly SIP is calculated on the SIP page. This result does not model market drops or rupee-cost averaging.

Publisher notes · reviewed 10 September 2026

Lumpsum growth versus a monthly SIP

A lumpsum calculator compounds one opening amount. It answers "if this money stays invested at rate r for t years, what is the ending value?" It does not average rupee-cost or model later top-ups unless you run those as separate scenarios.

Formula used on this page

Ending value A = P × (1 + r)^t when compounding is annual, or A = P × (1 + r/n)^(n t) when you choose a compounding frequency n. Toolioz uses the compound-interest engine with the frequency shown in the control. A ₹2,00,000 lumpsum at 12% for 10 years compounded annually is 200000 × (1.12)^10 ≈ ₹6.21 lakh. Monthly compounding on the same nominal 12% is slightly higher because interest is added twelve times a year.

That is not comparable to an SIP of ₹2,000 a month for 10 years: the SIP never had ₹2,00,000 working for the full decade. Compare equal rupees invested, or equal time, but not a lumpsum face value against a monthly debit.

When a lumpsum projection is the right model

Use this page for a bonus, maturity proceeds, or an existing corpus you do not plan to add to. Use the SIP page if money will arrive every month. Sequence-of-returns risk is real for both; a constant r hides it. If you need a conservative plan, run 8% and 10% next to 12% and keep the lower ending value as the working number.

Worked examples

  • ₹5 lakh for 8 years at 10%, annual compounding

    A = 500000 × (1.10)^8 ≈ ₹10.72 lakh. The same principal at 8% finishes near ₹9.26 lakh.

Limits of this page

  • No withdrawals, taxes, or expense ratios are applied unless you change r.
  • A constant rate ignores bear-market years at the start of retirement drawdown.

Sources