SIP vs FD vs PPF in 2026: An Honest Comparison With Post-Tax Numbers

Consider a familiar Indian household scene. A father has put ₹1.5 lakh into PPF every single year since 2005 — same time each year, like a festival. Money goes in, door closes, everyone's supposed to feel good.

Now imagine someone at the dinner table asking what it actually earned over 19 years. "It's safe. It's guaranteed. It's tax-free." All true. And yet — run the numbers, and the gap is uncomfortable. Not because PPF is bad — it isn't — but because nobody ever shows what the same money, put into a boring index-fund SIP year after year, would have done over the same period.

Here's an illustrative version of those numbers: ₹28.5 lakh of PPF contributions growing to roughly ₹52–58 lakh by 2024 (PPF rates moved between ~7–8.7% across those years). The same schedule in a Nifty 50 index fund, reinvested mechanically with zero brilliance, landing somewhere around ₹90–95 lakh based on historical total-return data. Rough numbers — but the shape of the gap is real.

This is a composite example, not a real family. But the argument it sparks — safety versus growth, certainty versus compounding — is one nearly every Indian household has had. Let's settle it with honest numbers instead of slogans.

Why most SIP-vs-FD-vs-PPF comparisons lie

Here's our opinionated take, and we won't soften it: almost every comparison article on this topic lies by omission. Not with wrong numbers — with carefully selected ones.

They show you gross returns and skip taxes entirely. FD interest is fully taxable at your slab rate. At a 30% slab, that "7% FD" is actually 4.9% in your pocket. Meanwhile they'll show SIP returns as a clean 12%, conveniently forgetting that long-term capital gains on equity aren't zero either — 12.5% on gains above ₹1.25 lakh per year. These aren't footnotes. They're the whole story.

They also ignore lock-in psychology. Every finance blog calls PPF's 15-year lock-in a disadvantage. Is it? Money that can't be panicked out of the market in 2008 or 2020 is money that did exactly what it promised. That lock-in is arguably a feature. An SIP, on the other hand, comes with an exit button you can press at 2 AM during a crash — and the temptation is real. Plenty of disciplined investors have almost pressed it.

And they pretend every investor is a robot. The models assume you never skip a SIP instalment, never pause "just for a few months," never redeem early for a wedding or a home down payment. Real humans do all of that. The honest comparison has to account for the human, not just the spreadsheet.

The ₹10,000/month experiment, with honest numbers

Let's run a clean, illustrative experiment: ₹10,000 a month, every month, for 15 years. That's ₹18 lakh of your own money going in. Here's roughly where each option lands, with the caveats spelled out like they should be:

Option	Assumed rate	Maturity after 15 years (approx)

|---|---|---|

PPF	7.1%, tax-free (EEE)	₹32 lakh
Bank FD (30% slab)	7% gross → ~4.9% post-tax	₹26.5 lakh
Index-fund SIP	11% assumed, pre-LTCG	₹45.5 lakh

Before anyone forwards this to the family group: PPF rates get revised quarterly by the government; 7.1% isn't a promise forever. The FD number assumes you keep renewing at 7% and pay 30% tax — your mileage varies with your slab. And the SIP's 11% is an assumption, not a warranty; the ₹45.5 lakh also loses a slice to LTCG (12.5% on gains above ₹1.25 lakh/year) when you finally sell. After that haircut, you're looking at something closer to ₹42–43 lakh.

Still, look at the spread. The FD — the option your friendly neighbourhood bank manager will pitch you with a free coffee — finishes last. That's not an accident. It's math.

The FD: a safety blanket with a hole in it

We don't hate FDs. An emergency fund parked in an FD is money sleeping well at night. FDs have one job: be there, exactly as promised, when you need the money soon. For a goal 1–3 years away — a trip, a home deposit, a sibling's wedding — an FD or a liquid fund is genuinely the right call. You can't index-fund your way through a timeline that short.

The problem is when people use FDs for 15-year goals. At ~7% gross and ~4.9% after tax, with inflation running at 5–6%, you're barely running in place. You're not preserving wealth; you're preserving the feeling of safety while quietly losing purchasing power. Also — and this takes most people embarrassingly long to learn — breaking an FD early usually costs a 0.5–1% penalty on the interest.

The PPF: boring, honest, and nowhere near dead

After that hypothetical dinner-table argument, you'd think the verdict would be to close the PPF out of spite. It shouldn't be. Here's why: PPF is the only instrument we know that's genuinely EEE — exempt on contribution (up to ₹1.5 lakh under the old regime), exempt on interest, exempt on withdrawal. In an era where everything gets taxed twice, that's worth something real.

Think of PPF as the safe-money bucket, not the growth bucket. It won't make you rich. It'll make sure a chunk of your money is definitely, boringly, there in 15 years, with zero dependence on your emotional stability during market crashes. That's a feature, not a consolation prize.

Is it still worth it in 2026? If you're in the old tax regime and claiming 80C, we'd say yes, up to a point. If you're on the new regime with no 80C benefit, the math gets thinner — the tax-free interest still matters, but so does the opportunity cost. (Same logic applies to NPS — the extra ₹50,000 deduction under 80CCD(1B) only exists in the old regime, so run your own slab math before committing.) For the risk-averse, PPF remains exactly the right product. For growth, it's one slice of a bigger plate.

The SIP: the scariest option — and the one we'd bet on

SIPs get marketed like a fitness program: "just start and never stop!" In reality, they're the option most dependent on your behaviour, which is precisely why they fail for so many people and work so well for the rest.

The raw math is unbeatable for long horizons. Over 10+ years, a plain Nifty 50 index fund SIP has historically beaten both FDs and PPF by a wide margin — not because of stock-picking genius, but because Indian equities, for all their drama, have compounded at roughly 11–12% over long stretches. You don't need to pick funds. You need to not quit them.

But let's be honest about the lies people tell themselves with SIPs too:

• You'll never pause it. You will. Job changes, medical bills, life. Plan for it instead of pretending it won't happen.
• Returns are guaranteed. They aren't. Anyone who says otherwise is selling something. A 15-year SIP can still have ugly stretches — 2008 to 2013 was five years of going sideways, and plenty of people gave up.
• You need a fancy fund. You don't. A low-cost index fund beats most of the active funds a relationship manager pushes, and it doesn't charge you ~2% a year for the privilege.
• The bank's "recommended" fund is the best. It's usually the one paying the highest commission to the person recommending it. A low-cost index fund doesn't have a sales team, which is exactly why nobody recommends it over coffee.

Here's a system that actually works, and we'll be specific since vague advice is worthless. Split the salary the day it lands: EPF happens automatically through the employer (you never see the money, so you never miss it). A fixed monthly amount goes to PPF on standing instruction — the "safe" money. And a monthly SIP into a Nifty 50 index fund gets treated like a utility bill: it gets paid before you decide what you "can afford" that month. The SIP auto-debit is sacred. Check the portfolio twice a year, max.

One rule is worth more than any fund selection: you can pause new investments if you're scared, but you can never sell old ones out of fear. Pausing is a delay. Selling at the bottom is a decision.

Now the admission: we're not SEBI-registered investment advisors. This is a finance site sharing what the numbers say, not financial advice. Your risk tolerance, salary, and dependents differ from anyone else's. If your situation is complicated, talk to a real, fee-only advisor — not your bank's "wealth manager" (who is, in our experience, a salesperson with a nicer chair).

And if you want to run your own numbers — you shouldn't trust ours — profitai.in has a free SIP calculator that does the compounding math without requiring a midnight spreadsheet.

Pick the tool for the job, not the job for the tool

So: FD for short-term money you can't afford to lose. PPF for the safe, tax-free foundation you never have to think about. SIP for the long game, if you can stomach the ride and — more importantly — if you can keep your hands off the exit button.

The PPF loyalist isn't wrong — they're optimising for certainty in a country where it's rare, and PPF does exactly what's asked of it. The SIP devotee just wants a different trade-off. What we wish is that someone showed everyone the honest, post-tax numbers a decade earlier.

A cheat sheet, if you want one:

• Money you'll need within 3 years → FD or liquid fund. No debate, no heroics.
• Money you won't touch for 10+ years → index-fund SIP on auto-debit, checked twice a year.

Start the SIP. Keep the PPF. Use the FD for the trip. And never bring a spreadsheet to a family dinner.