ELSS vs PPF over 15 years: post-tax XIRR comparison and the lock-in trade-off

If you have Rs 1.5 lakh earmarked for Section 80C every financial year, the ELSS versus PPF choice rarely turns on the headline table alone. One product rides Nifty 500 drawdowns to chase a 12 per cent compound; the other locks in a sovereign 7.1 per cent rate fixed by the Ministry of Finance for Q1 FY 2025-26. Both deductions disappear if you opt for the new tax regime — Section 80C is an old-regime-only concession under the Finance Act 2023, the same statute that pushed the new regime to default status from FY 2023-24. Both also share the Rs 1.5 lakh annual cap.

Over 15 years of identical Rs 1.5 lakh annual contributions, the post-tax gap is real but smaller than equity-cult forums suggest. After paying 12.5 per cent LTCG on gains above the Rs 1.25 lakh annual exemption — the rate that took effect on 23 July 2024 under the Finance (No. 2) Act, 2024 — an ELSS portfolio compounding at 12 per cent pre-tax leaves roughly Rs 51 lakh in your hand. PPF at 7.1 per cent, completely tax-free under its EEE status, finishes at about Rs 40.4 lakh on a start-of-year contribution schedule. That gap of Rs 10-11 lakh is the equity risk premium and the buffer that vanishes during a 35 per cent drawdown like the one between January and March 2020.

Side-by-Side Comparison

The inputs are deliberately stripped down: Rs 1.5 lakh annual contribution, 15 financial years, no top-ups, no partial withdrawals. ELSS returns are modelled at 12 per cent net of a 1 per cent expense ratio embedded in NAV, close to the lower bound of the AMFI 15-year ELSS category rolling-return band of 12 to 14 per cent. PPF compounds at 7.1 per cent, the rate notified on 28 March 2025 for Q1 FY 2025-26 and unchanged through subsequent quarterly reviews. You can replicate every cell using the SIP calculator and PPF calculator.

Note how the equity premium narrows once the 12.5 per cent LTCG haircut is applied. The methodology assumes you redeem ELSS in tranches large enough to fully use the Rs 1.25 lakh annual LTCG exemption each year after the 15-year mark, a realistic assumption only if the investor stays disciplined and has no other equity sales competing for the same exemption. Lumping a single Rs 56 lakh redemption in year 15 would push effective tax above 11 per cent of gains and shave another Rs 1.5-2 lakh off the post-tax corpus.

The lock-in mechanics also differ. PPF locks all contributions until the account-level 15-year completion, calculated from the end of the FY of first deposit. ELSS locks each SIP instalment individually for 36 months; the first month's contribution becomes redeemable three years later, the second a month after that, and so on. By year 4, an ELSS investor has a steadily growing pool of redeemable units, useful in a job loss or medical emergency. PPF allows only partial withdrawal from the 7th FY onward, capped at 50 per cent of the balance at the end of FY-4.

Tax Treatment

The Section 80C deduction is identical for both products: Rs 1.5 lakh aggregate per financial year across all 80C investments, available only under the old regime. The split between contribution-side and exit-side taxation is where the products diverge sharply, and this divergence is the reason most pre-tax return comparisons mislead.

A few less-obvious mechanics: the STCG rate on equity rose from 15 per cent to 20 per cent on 23 July 2024 under Section 111A as amended by the Finance (No. 2) Act, 2024, although ELSS investors rarely face this rate because the 3-year lock-in pushes every unit into the long-term bracket. Surcharge on equity LTCG is capped at 15 per cent even for investors with total income above Rs 5 crore, a quirk of the Finance Act 2022 carve-out preserved in subsequent budgets. Cess at 4 per cent of tax applies on top, taking the headline 12.5 per cent LTCG to an effective 13 per cent for most retail investors.

PPF interest is credited on 31 March using the lowest balance between the 5th and end of each month, a calculation rule that rewards depositors who fund the full Rs 1.5 lakh before 5 April of each FY. Investors who spread the contribution as a monthly SIP lose roughly 11 months of compounding on each tranche relative to a single 5 April lump sum, dragging the effective rate from 7.1 per cent to about 6.55 per cent over 15 years. The PPF calculator bakes this rule into its date-aware mode.

Who Should Pick Which

The textbook answer that equity is for the young and fixed income for the old collapses under closer inspection. Risk capacity is necessary but not sufficient; what actually matters is the investor's ability to remain invested through a 30-40 per cent drawdown without behavioural error. Below is a profile-based recommendation grid drawn from the same Rs 1.5 lakh annual budget assumption used throughout.

A salaried investor under 35 with a stable cash flow and no other equity exposure should default to ELSS. The 3-year unit-level lock-in builds forced discipline, the ELSS calculator can model SIP tranching, and 30-plus years to retirement makes the 12.5 per cent LTCG drag a worthwhile trade for the equity premium. The same investor in the new tax regime, however, loses the 80C deduction entirely, which collapses ELSS's structural advantage. In that case, a flexi-cap fund outside ELSS, with the same LTCG rate but no lock-in, is mechanically superior; the hybrid fund tax classification piece walks through the wider equity-versus-hybrid trade-off post-2024.

A conservative investor approaching retirement, or one whose total equity allocation already exceeds 60 per cent of net worth, should default to PPF. The sovereign guarantee, EEE status and tax-free maturity make PPF behaviourally easier to hold than a debt fund taxed at slab rates after the Finance Act 2023's indexation removal, a comparison detailed in the debt fund taxation post-April 2023 article. PPF also pairs well with NPS Tier I for the additional Rs 50,000 deduction under Section 80CCD(1B), which remains old-regime-only.

A self-employed professional with irregular cash flow has a harder choice. PPF's compulsory annual deposit minimum of Rs 500 is trivial, but the 15-year illiquidity is harsh during business contractions. ELSS through a flexible SIP that you can pause or resume on any platform is the typical fit, supplemented by direct equity for tactical conviction. The trade-off is captured in the annual LTCG harvesting piece, which models how to ratchet equity gains within the Rs 1.25 lakh exemption every year.

A high-income investor in the 30 per cent slab with surcharge has yet another calculation. Old regime: the full Rs 1.5 lakh 80C deduction saves Rs 46,800 in tax at 30 per cent plus 4 per cent cess plus applicable surcharge, making both ELSS and PPF effectively boosted by that subsidy on entry. New regime: zero entry subsidy, but the Rs 60,000 Section 87A rebate is unavailable above Rs 12 lakh total income anyway, so the regime arithmetic turns on slab arbitrage rather than 80C alone. Run both scenarios through the SIP calculator using your marginal rate to see which leg of the comparison your own income shifts.

A final cohort worth flagging: investors saving for a specific 15-year goal such as a child's higher education or a property purchase. Here PPF wins on certainty even when expected ELSS returns are higher, because a 30 per cent drawdown in year 14 destroys the goal in a way the equity premium cannot recover from inside the remaining horizon. The professional-grade move is to use PPF as the core and a separate ELSS or flexi-cap allocation as the satellite, sizing the satellite so that a 40 per cent drawdown still leaves the PPF leg adequate for the goal. The lumpsum calculator helps size the satellite using shortfall-probability inputs.

FAQ

Can I claim Section 80C for ELSS or PPF if I have shifted to the new tax regime?

No. Section 80C, 80CCD(1B) and most Chapter VI-A deductions are unavailable under the new regime that became the default from FY 2023-24. Only the old regime allows the Rs 1.5 lakh ELSS or PPF deduction; choosing it means accepting the higher slab rates and forgoing the Rs 60,000 Section 87A rebate available on incomes up to Rs 12 lakh under the new regime.

What is the LTCG rate on ELSS redemptions after the 3-year lock-in?

Long-term capital gains on ELSS units held over 12 months are taxed at 12.5 per cent under Section 112A, after the annual Rs 1.25 lakh exemption per financial year. This rate took effect on 23 July 2024 under the Finance (No. 2) Act, 2024; redemptions before that date attracted 10 per cent on gains above Rs 1 lakh.

Is the PPF interest rate fixed for 15 years?

No. The Ministry of Finance notifies a new PPF rate every quarter; the rate for Q1 FY 2025-26 is 7.1 per cent compounded annually, but it can be revised in any future quarter. Your accrued balance always earns the rate prevailing in that quarter, not the rate at the time you opened the account.

What happens to my PPF account at the end of 15 years?

You can withdraw the entire corpus tax-free, retain the balance without further contributions and continue earning interest, or extend in five-year blocks with or without fresh contributions by submitting Form H within one year of maturity. The 15-year clock starts from the end of the financial year in which the first deposit was made, not from the date of opening.

How does ELSS compare with a regular diversified equity fund after tax?

Post-tax returns are mathematically identical because both attract 12.5 per cent LTCG above the Rs 1.25 lakh annual exemption under Section 112A. ELSS only adds the 80C deduction and a hard 3-year lock-in; if you have already exhausted 80C through EPF, home-loan principal or insurance premiums, a flexi-cap or large-cap fund without the lock-in usually beats ELSS on flexibility.

Can I split Rs 1.5 lakh between ELSS and PPF in the same year?

Yes. The Section 80C cap of Rs 1.5 lakh per financial year is aggregate across eligible instruments; you could put Rs 75,000 into each, or any split, and claim the combined deduction in the old regime. The PPF annual limit itself is Rs 1.5 lakh across all your PPF accounts including those for minor children.

What is a reasonable post-tax XIRR assumption for ELSS over 15 years?

Indian ELSS category 15-year rolling returns have historically clustered between 12 and 14 per cent pre-tax. After deducting 12.5 per cent LTCG above the Rs 1.25 lakh exemption and assuming a 1 per cent expense ratio is already absorbed in NAV, a planning XIRR of 10.5 to 12 per cent post-tax is defensible for a diversified ELSS held to maturity.