SIP vs FD: Which Is Better for Long-Term Wealth in 2026? (Post-Tax Math)
Deep mathematical comparison between Equity Mutual Fund SIP and Bank Fixed Deposits (FD) across 5, 10, and 15-year horizons, factoring in 30% slab tax drag, inflation, and 12.5% LTCG.
Ankit Bansal• Founder, fincalculator.in
4 September 2026
11 min read
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Frequently Asked Questions (FAQs)
Why does an Equity SIP generate more wealth than a Fixed Deposit (FD)?
Equity mutual fund SIPs compound at historic averages of 12%–14% CAGR and benefit from rupee cost averaging. Furthermore, FD interest is taxed every year at your highest income slab (up to 30% + cess), while Equity SIP LTCG is only taxed upon withdrawal at 12.5% (with the first ₹1.25 Lakhs per year completely tax-free).
How is FD interest taxed compared to Equity SIP returns?
FD interest is added to your total annual income and taxed at your marginal slab rate (e.g. 5%, 10%, 15%, 20%, or 30%). In contrast, equity mutual fund capital gains held for >12 months are categorized as Long-Term Capital Gains (LTCG) taxed at a flat 12.5% on gains exceeding ₹1.25 Lakhs per financial year.
When should an investor choose FD over an Equity SIP?
Fixed Deposits are best suited for short-term goals (<3 years), emergency funds, and capital preservation where zero market volatility is required. For long-term goals (>5 to 7 years), an Equity SIP is far superior in beating Indian inflation and building real purchasing power.
Relevant Financial Calculators
Put these concepts into practice using our free, instant financial calculators:
When Indian families decide where to park their hard-earned monthly savings, the debate almost always centers around two familiar choices: the time-tested security of Bank Fixed Deposits (FD) versus the high-growth compounding potential of an Equity Mutual Fund SIP (Systematic Investment Plan).
On the surface, Fixed Deposits feel reassuring. A guaranteed 7.0%–7.5% interest rate backed by scheduled commercial banks eliminates the anxiety of stock market swings. However, when you factor in annual slab-rate income tax and India's realistic 6.0% cost-of-living inflation, the math tells a very different story: money in an FD often loses real purchasing power every single year.
In this guide, we lay out the exact post-tax mathematics across 5, 10, and 15-year timelines to show why Equity SIPs create significantly more generational wealth for long-term investors.
1. The Head-to-Head Comparison Table
Equity SIP vs Bank Fixed Deposit (FD) Comparison
Feature / Dimension
Bank Fixed Deposit (FD / RD)
Equity Mutual Fund SIP
Historical Return Benchmark
6.5% – 7.5% p.a. (Fixed)
12.0% – 14.0% CAGR (Market-linked)
Taxation Mechanism
Taxed every year at your income tax slab (up to 30% + cess)
12.5% LTCG on redemption above ₹1.25L/yr exemption
Many investors forget that FD interest is not taxed at a preferential rate—it is classified as “Income from Other Sources”. If your taxable income puts you in the 30% bracket (with 4% health and education cess, effective rate is 31.2%):
Gross FD Rate: 7.00%
Annual Tax Deducted: -2.18% (31.2% of 7%)
Net Post-Tax In-Hand Return:4.82%
With education, healthcare, and lifestyle inflation averaging 6.0%–7.0% in urban India, parking long-term wealth in an FD guarantees a negative real return after taxes.
Finding #2: The 10-Year ₹7+ Lakh Wealth Gap on a ₹10,000 Monthly SIP
Let's compare depositing ₹10,000 every month for 10 years (Total principal invested: ₹12 Lakhs):
Bank FD (7% gross, 30% slab net ~4.8%): Final Value = ~₹15.1 Lakhs (Net gain: ₹3.1L)
Equity SIP (12% CAGR, post 12.5% LTCG tax): Final Value = ~₹22.1 Lakhs (Net gain: ₹10.1L)
The Equity SIP delivers an extra ₹7,00,000+ in pure net in-hand wealth. Over 20 years, this wealth gap balloons to more than ₹35 Lakhs!
Finding #3: The Ideal Dual-Bucket Allocation Framework
Smart financial planning does not mean choosing 100% FD or 100% SIP. The proven asset allocation strategy is:
Bucket 1 (Emergency & Short-Term): Keep 6 months of household living expenses in a High-Yield Bank FD or Liquid Mutual Fund for instant liquidity without equity market risk.
Bucket 2 (Long-Term Wealth > 5 Years): Direct all regular monthly surplus into diversified Equity Index (Nifty 50) and Flexicap mutual fund SIPs.
3. Interactive Calculator: Simulate Your Exact Numbers
Adjust your monthly investment, time horizon, and income tax bracket below to see the exact post-tax trajectory for your portfolio:
Key Takeaway for 2026:Fixed Deposits are a capital preservation tool, not a wealth creation tool. Use FDs for emergencies and goals under 3 years. For goals 5 years away (children's college, buying a home down payment, retirement), start an Equity SIP early and let the power of compounding do the heavy lifting.
