SIP vs PPF: The 15-Year Post-Tax Comparison, and Where EEE Still Wins

Short answer: over a full 15-year stretch, an equity SIP usually builds more wealth than PPF, even after you pay tax on the SIP and pay nothing on PPF. In a like-for-like comparison of ₹1.5 lakh a year, a 12 percent equity SIP grows to about ₹58.2 lakh post-tax, while PPF at its current 7.1 percent grows to about ₹40.7 lakh completely tax-free. Equity still wins by roughly ₹17.5 lakh. But that headline hides the real point: PPF and SIP are not rivals doing the same job. One gives you certainty, the other gives you growth, and the smart move is usually to hold both.

Let me show you the full 15-year math on a post-tax basis, then walk through exactly where PPF’s famous EEE tax status wins and where it quietly loses.

PPF and SIP are not the same kind of product

This is the mistake behind most “SIP vs PPF” debates. PPF is a government-backed debt product. Your money earns a fixed rate, set every quarter, with zero market risk and a sovereign guarantee. An equity SIP is a market investment. It can swing hard in any given year, but over long periods it has historically delivered much higher returns.

So comparing them is really comparing safety against growth. Judging PPF only by its final number misses its real value, which is certainty. Judging a SIP only by its risk misses its real value, which is compounding at a higher rate. Keep that in mind as we look at the numbers.

The 15-year comparison, both post-tax

Let us invest the same ₹1.5 lakh a year, which is the PPF annual limit, into each option for 15 years. For the SIP that is ₹12,500 a month. The growth of a regular monthly investment follows the standard formula:

Here P is the amount invested each period, r is the periodic return, and n is the number of periods. Running PPF at its current 7.1 percent and the equity SIP at an assumed 12 percent gives this:

The SIP’s tax is 12.5 percent long-term capital gains on equity profits above ₹1.25 lakh in the year you redeem. Even after paying that ₹4.9 lakh, the SIP ends about ₹17.5 lakh ahead. And you can shrink that tax further by redeeming in tranches across a few years to use the ₹1.25 lakh exemption more than once, or by drawing the money as a Systematic Withdrawal Plan. Model your own version in our SIP calculator, and remember that real returns rarely arrive in a smooth line, which we explain in why SIP returns look different in real life vs calculator results.

Where PPF’s EEE status actually wins

PPF is EEE, which means Exempt-Exempt-Exempt: your contribution is deductible under Section 80C in the old regime, the interest is tax-free, and the maturity amount is tax-free. That triple exemption is genuinely powerful, and here is where it shines.

The trick is to compare PPF’s tax-free rate against the pre-tax rate you would need from a taxable product to match it:

For someone in the 30 percent slab, that is 7.1 percent divided by 0.70, which equals about 10.14 percent. So PPF’s 7.1 percent tax-free is like earning 10.14 percent from a taxable fixed deposit. That is a very strong, completely risk-free return. PPF wins clearly when:

• You want zero risk. The return is guaranteed and government-backed. No market can touch it.
• It is your debt or safety allocation. Against FDs, debt funds, and NSC, PPF’s tax-free status usually makes it the best fixed-income option, especially in higher tax slabs. It beats an FD comfortably here, as we cover in SIP vs FD.
• The goal is near or fixed. For money you must have on a set date, PPF’s certainty is worth more than equity’s higher average.
• You want forced discipline. The 15-year lock-in stops you from touching long-term money.

Where PPF’s EEE status does not win

Tax-free is not the same as high-return. Over long horizons, PPF’s fixed 7.1 percent simply cannot keep up with equity’s compounding, even after the SIP pays tax. EEE loses its shine when:

• The horizon is long. Over 15 years or more, the return gap matters far more than the tax gap. A taxed 12 percent still crushes a tax-free 7.1 percent, as the table above shows.
• You are fighting inflation. PPF at 7.1 percent only sits a couple of percent above typical inflation, so your real growth is thin. Equity has historically built real wealth, not just nominal. See the trend in the inflation rate in India over the last 10 years.
• You are on the new tax regime. The 80C deduction on PPF contributions is not available in the default new regime, so one leg of that EEE benefit disappears for many people. The interest and maturity stay tax-free, but the upfront deduction may not apply to you.
• You have a long limit-free runway. PPF caps you at ₹1.5 lakh a year. A SIP has no ceiling, so serious wealth building needs the equity route anyway.

The smart answer: use both, by job

You do not have to pick a side. The cleanest approach is to give each product the job it is best at.

• PPF as your safe, debt allocation. Park the fixed-income part of your portfolio here for tax-free, guaranteed growth.
• Equity SIP as your growth engine. Use it for long-term wealth, where higher returns compound hard even after tax.
• Split by goal and timeline. Near-term and must-have goals lean PPF. Long-term goals like retirement lean SIP. If you want a fuller retirement picture, compare the options in our guide on NPS vs mutual fund SIP for retirement.

One more tip if you go the SIP route: always choose the direct plan, because the commission baked into regular plans can quietly cost you lakhs over the same period, which we break down in direct vs regular mutual fund plans.

The bottom line

PPF is a brilliant safe-money product, and its tax-free 7.1 percent beats almost any fixed deposit, especially in a high tax slab. But tax-free is not the same as wealth-building. Over 15 years, a 12 percent equity SIP grows to about ₹58.2 lakh after tax against PPF’s ₹40.7 lakh, and that gap only widens with time. Use PPF for safety and certainty, use a SIP for growth, and let each do the job it is actually good at.