SIP vs FD: which builds more wealth?
This is framed as a contest and is really a question of matching the instrument to the timeline. One protects capital and barely outpaces inflation. The other is volatile in the short run and has historically compounded well over long periods. Both are correct for different jobs.
The honest comparison
Fixed deposits from major Indian banks have generally offered somewhere around 6.5–7.5% for medium tenures in recent years, with rates varying by bank and tenure. The return is contractual and the capital is protected, with deposit insurance covering up to ₹5 lakh per bank per depositor.
Equity mutual funds carry no guarantee at all. Indian equity indices have delivered roughly 11–12% annualised over long multi-decade periods, with severe interim falls — drawdowns exceeding 40% have occurred more than once.
Over a genuinely long horizon that gap compounds into something dramatic. Over three years it is a coin flip that can easily land badly.
Tax is where the FD quietly loses
This is the part that changes the comparison materially, and it is routinely ignored.
FD interest is taxed at your slab rate, every year, whether or not you withdraw it. For someone in the 30% bracket, a 7% FD returns roughly 4.9% after tax.
Equity gains are taxed only on sale, and long-term capital gains on listed equity receive concessional treatment with an annual exemption threshold. Tax deferred for fifteen years is tax that has been compounding in your favour the whole time.
Now compare 4.9% post-tax against inflation running around 5–6%. A fixed deposit held by a high-bracket taxpayer frequently loses purchasing power in real terms. It is safe in nominal rupees and quietly shrinking in what those rupees buy.
Match the instrument to the timeline
Under three years: FD, or a liquid or short-duration debt fund. Capital preservation is the whole job. Equity here is not investing, it is gambling with a deadline.
Three to seven years: a mix. Hybrid or balanced advantage funds are built for this middle ground.
Over seven to ten years: equity SIP has the stronger case, because there is time to absorb drawdowns and let compounding operate.
The emergency fund is a separate matter entirely and belongs in an FD or liquid fund regardless of your horizon, because its job is availability, not return.
The scale of the difference
Run ₹10,000 a month for twenty years through the compound interest calculator.
At 7% (a rough FD rate, before tax) it reaches about ₹52 lakh. At 11% (a long-run equity assumption) it reaches about ₹87 lakh. Same contributions of ₹24 lakh; a difference of ₹35 lakh.
Apply the tax treatment and the gap widens further. But the equity path includes years where the balance falls sharply, and the entire advantage depends on not selling during those years.
What actually decides the outcome
The instrument matters less than three other things.
Continuing through falls. An investor who stops during a crash captures the downside and misses the recovery, ending worse off than one who chose an FD.
Costs. A direct plan over a regular plan saves roughly 0.5–1% a year. Over twenty years that difference alone runs to several lakh.
Time. Twenty years of an FD beats ten years of equity in most scenarios. Starting earlier outweighs choosing better.
Frequently asked questions
Is SIP better than FD?
For horizons beyond seven to ten years, equity SIPs have historically produced materially more, with significant interim volatility. For anything under three years, or for an emergency fund, an FD or liquid fund is the appropriate choice. They do different jobs rather than competing.
How is FD interest taxed in India?
FD interest is added to your income and taxed at your slab rate every year, whether or not you withdraw it. For a 30% bracket taxpayer, a 7% FD yields roughly 4.9% after tax, which is often below inflation - meaning a real loss in purchasing power.
Are equity mutual funds safe?
Not in the short term. Indian equity indices have fallen more than 40% on multiple occasions. Over long periods they have compounded well, but the entire advantage depends on staying invested through those falls, which is a behavioural requirement, not a financial one.
Where should I keep my emergency fund?
In an FD, sweep-in deposit or liquid fund - somewhere accessible within a day or two. The job of an emergency fund is availability, not return, so equity is inappropriate regardless of your time horizon.