Most "SIP vs FD" articles explain the concepts thoroughly and then never actually run the numbers. Here's what ₹5,000 a month for 10 years actually looks like in both, so the comparison means something concrete instead of just "it depends on your risk appetite."
The same ₹5,000/month, two different paths
Total invested either way over 10 years (120 months): ₹6,00,000.
| Recurring FD (≈6.5% p.a.) | SIP in equity fund (≈12% p.a., illustrative) | |
|---|---|---|
| Total invested | ₹6,00,000 | ₹6,00,000 |
| Approx. maturity value | ≈ ₹8.1 lakh | ≈ ₹11.6 lakh |
| Approx. gain | ≈ ₹2.1 lakh | ≈ ₹5.6 lakh |
| Value certainty | Known in advance | Not guaranteed — could be higher or lower |
On paper, the SIP number looks meaningfully better — and over many historical 10-year windows, equity has outperformed FD returns. But that ₹11.6 lakh figure assumes a smooth 12% average for 10 straight years, which markets never actually deliver in a straight line.
The risk this comparison usually skips: sequence-of-returns risk
The 12% figure is an average — the real path might be +18% one year, -8% another, +25% another. If a downturn happens to land in your final year or two, right when you need the money, your actual corpus could be meaningfully lower than the smooth-average projection, even if the long-term average holds up over decades. This is called sequence-of-returns risk, and it's exactly why SIPs are suited to goals with real time flexibility, not a fixed deadline like a wedding date or a course fee due next year.
An FD doesn't have this problem — the ₹8.1 lakh figure isn't an average, it's essentially locked in from day one, which is the entire trade-off: certainty in exchange for a lower expected return.
The tax difference nobody mentions
FD interest is fully taxable at your income slab rate every year it's earned (with TDS deducted if it crosses ₹40,000 in a year). Equity mutual fund gains, by contrast, are taxed only when you redeem, and only above ₹1.25 lakh of gains in a financial year under current long-term capital gains rules — a real, often overlooked advantage for SIP investors with a long horizon, separate from the raw returns comparison.
A practical rule, not a universal answer
Money needed within 3 years: FD or an equivalent low-risk option — sequence-of-returns risk is too dangerous on a short timeline. Money genuinely not needed for 7+ years: SIP becomes reasonable to consider, since there's enough time to ride out a bad sequence. The 3–7 year zone is genuinely a judgment call based on your personal risk tolerance, not something either product can decide for you.
FAQs
Can I switch from SIP to FD if the market looks risky?
You can redeem and move funds, but timing the market successfully
is difficult even for professionals — a fixed asset allocation
decided in advance is generally more reliable than reactive
switching.
Is 12% a realistic long-term SIP return to expect?
It's a commonly used illustrative assumption based on long-term
historical equity averages, not a guarantee — actual returns for
any specific 10-year period could be meaningfully higher or lower.
