Lumpsum Calculator India — FY 2025-26
Calculate how your one-time investment grows with compound interest. See the real cost of expense ratios on direct vs regular plans, and compute exact LTCG/STCG tax on your mutual fund gains. Updated for Finance Act 2024 rates.
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How to Use This Calculator
Lumpsum Returns tab
Enter your one-time investment amount, expected annual return, and investment tenure. The calculator shows your future value, total gain, and CAGR. Use this to understand how a single lump sum grows through the power of compounding over time.
Impact of Expense Ratio tab
Compare how much you keep in a direct plan vs a regular plan over the same tenure. Enter the expense ratios for both plans and see the exact rupee difference. Even a 1-1.5% difference compounds dramatically over 10+ years, often costing lakhs in lost returns.
Tax on Gains tab
Enter your total capital gains from mutual fund redemption, select the fund type (equity, hybrid, or debt) and holding period. The calculator computes your LTCG or STCG tax liability based on Finance Act 2024 rates. Optionally include exit load for short-term redemptions.
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The Formula
Lumpsum returns are calculated using the standard compound interest formula:
FV = PV × (1 + r)n
Where:
PV = Present Value (lump sum investment amount)
r = Annual rate of return (as a decimal, e.g. 12% = 0.12)
n = Number of years
FV = Future Value (maturity amount)
CAGR (Compound Annual Growth Rate):
CAGR = (FV / PV)1/n − 1
Expense Ratio Impact:
Effective return = Gross return − Expense ratio
Direct plan FV = PV × (1 + rdirect)n
Regular plan FV = PV × (1 + rregular)n
Capital Gains Tax (FY 2025-26):
Equity MF — LTCG (held > 1 year): 12.5% on gains above ₹1,25,000/year
Equity MF — STCG (held < 1 year): 20% on entire gains
Debt MF (purchased after 1 Apr 2023): Taxed at income slab rate, no indexation
The formula assumes a constant annual rate of return, which is a simplification. In reality, mutual fund returns fluctuate year to year. The CAGR smooths these fluctuations into a single annualised number. Over long periods (10+ years), equity mutual funds have historically delivered ~12% CAGR in India.
Example
Rahul — Mumbai IT professional invests ₹5,00,000 lump sum
Rahul is 30, received a bonus of ₹5,00,000 and wants to invest it in a NIFTY 50 index fund expecting 12% annual returns for 10 years. He is choosing between a direct plan (0.5% expense ratio) and a regular plan (2% expense ratio).
Step 1: Lumpsum calculation
Step 2: Future value
Step 3: Expense ratio impact
Step 4: Tax on gains (LTCG)
Rahul's ₹5 lakh lump sum grows to ₹15.53 lakh in 10 years at 12% CAGR. By choosing a direct plan over regular, he saves ₹1.88 lakh. After LTCG tax of ₹1.16 lakh, his net gain is ₹9.37 lakh on a ₹5 lakh investment.