ELSS tax-saving SIP: how it works, the 3-year lock-in, and who still saves tax

Every January the office asks for investment proofs, and the old advice comes back: put something in PPF or buy a policy to save tax. An ELSS SIP is the other common answer: a mutual fund that saves tax and invests in shares, with the shortest lock-in of all the tax-saving options.

But the rules around it have changed. The new tax regime is now the default, and it gives no deduction for ELSS. From tax year 2026-27 the deduction is Section 123 (formerly 80C) of the Income-tax Act 2025. This guide explains how an ELSS SIP works, who still saves tax with it, the 3-year lock-in, and how it compares with PPF. The SIP calculator beside the guide follows each example.

How does an ELSS SIP work?

ELSS means equity linked savings scheme: an equity mutual fund that qualifies for the tax deduction. A SIP is simply the way you pay into it: a fixed amount every month instead of one big amount in March. So “ELSS and SIP” are not the same thing: ELSS is the fund, SIP is the method.

Take Arjun, a software engineer from Kallakurichi who works in Chennai and files under the old tax regime. He invests ₹12,500 a month, which adds up to the full ₹1.5 lakh a year. If the fund earns an assumed 12% a year, after 10 years he would have put in ₹15 lakh, and the fund could be worth about ₹29 lakh. If he sold it all at once, about ₹27.4 lakh would be left after the 12.5% capital gains tax.

Paying monthly also means he buys some units when prices are low and some when they are high, instead of betting everything on the price in the last week of March.

Mutual fund returns are not guaranteed, and past returns do not promise future ones. ELSS funds invest in shares and can fall in value, including during the lock-in.

ELSS SIP tax benefit: can you still save ₹46,800?

Yes, but only if you file under the old tax regime and your income is in the 30% slab. The ₹46,800 is 30% tax plus 4% cess on the full ₹1.5 lakh deduction. In a lower slab you save less:

Your slab (old regime)	Tax saved on ₹1.5 lakh in ELSS
30%	₹46,800
20%	₹31,200
5%	₹7,800
New regime (default)	Nothing

Three things decide whether ELSS saves you tax at all:

1. Your regime. The new regime has been the default since 2023-24 and allows no deduction for ELSS, PPF or insurance. With lower slab rates and no tax on income up to ₹12 lakh, many salaried people now pay less in the new regime even without any deductions. Work out both before you invest for tax.
2. The shared ₹1.5 lakh limit. ELSS shares the limit with your EPF contribution, PPF, life insurance premiums, children’s tuition fees and home loan principal. If your EPF already uses most of it, extra ELSS saves little tax.
3. The new law. From 1 April 2026 (tax year 2026-27), the Income-tax Act 2025 replaced the 1961 Act. The deduction is now Section 123, read with its schedule listing the eligible items. The limit is still ₹1.5 lakh and ELSS still qualifies. Claims for 2025-26 are still made under the old Section 80C.

ELSS saves tax only for people who choose the old regime. For everyone else, it is a regular equity fund with a 3-year lock.

ELSS SIP lock-in period: each instalment waits 3 years

ELSS has a 3-year lock-in, the shortest of the tax-saving options (PPF runs 15 years, tax-saving FDs 5). In a SIP, each instalment has its own lock-in. The units Arjun buys in January 2027 can be sold from January 2030; the February 2027 units from February 2030, and so on.

So if he runs his ₹12,500 SIP for 3 years, he puts in ₹4.5 lakh, but only the first month’s units are free at the end of year 3. The last instalment unlocks almost 3 years after that. Stopping the SIP doesn’t unlock anything either: it only stops new instalments.

After 3 years nothing happens by itself. The units stay invested until you ask to redeem them. For an equity fund, five years or more is a better horizon anyway; treat the lock-in as a minimum, not a target.

Is an ELSS SIP tax free when you withdraw?

No. The deduction is on the money you put in; the gains are taxed when you sell. Because every unit is held for at least 3 years, all ELSS gains are long-term: taxed at 12.5% on gains above ₹1.25 lakh in a financial year.

You can reduce this tax by selling in parts over several years, so that each year’s gain stays near ₹1.25 lakh. The calculator assumes you sell everything at once, so it shows the most tax you would pay.

ELSS vs PPF: which is better?

Both count toward the same ₹1.5 lakh limit in the old regime. They suit different needs.

What	ELSS	PPF
Return	Not fixed; moves with the market	7.1% in October 2026 (India Post), set by the government each quarter
Lock-in	3 years per instalment	15 years, with partial withdrawals from year 7
Tax on returns	12.5% on long-term gains above ₹1.25 lakh a year	Tax-free
Risk	Can fall in value	Government-backed

The 7.1% line is close to, not exactly, PPF (PPF credits interest once a year). The equity figure is not guaranteed and could be lower. Many people split the limit: PPF for the safe part, ELSS for growth.

ELSS SIP vs normal SIP, and SIP vs lumpsum

An ELSS SIP and a normal equity SIP invest in much the same kind of shares. The differences are the deduction (old regime only) and the 3-year lock-in. If you are in the new regime, a normal flexi-cap or index fund SIP gives you the same kind of growth without the lock-in.

Compared with putting ₹1.5 lakh in at once in March, a monthly SIP spreads your buying over the year and is easier on a salary. A lumpsum early in the year has more time in the market, but most people find the monthly route simpler to keep up.

To plan your own amount, try the SIP calculator. Our guides on SIP vs RD and SIP mistakes cover what to pair with it and what to avoid.

Questions

Is ELSS and SIP the same?

No. ELSS is a type of mutual fund that qualifies for a tax deduction; SIP is a way of investing a fixed amount every month. You can invest in ELSS through a SIP or as a lumpsum.

Is an ELSS SIP tax free?

Not fully. Up to ₹1.5 lakh a year is deductible in the old regime, but the gains are taxed when you sell: 12.5% on long-term gains above ₹1.25 lakh in a financial year. In the new regime there is no deduction at all.

Can I stop an ELSS SIP before 3 years?

Yes, you can stop the SIP any time, and future instalments stop. But you cannot withdraw any units before each one completes its own 3 years, and stopping does not unlock them early.

How do I redeem an ELSS SIP after 3 years?

Place a redemption request with the fund house or your app for the units that have finished 3 years. Units bought later stay locked until their own dates. Nothing is redeemed automatically when the lock-in ends.

Does ELSS work in the new tax regime?

You can invest in it, but you get no deduction. The new regime, the default since 2023-24, does not allow the Section 123 deduction. Choose ELSS for tax only if you file under the old regime.

ELSS comes under which section?

Under Section 123 of the Income-tax Act 2025 (read with its schedule), from tax year 2026-27, with the same ₹1.5 lakh limit, in the old regime only. Claims for 2025-26 used the old Section 80C.

Which is better, ELSS or PPF?

ELSS has a shorter lock-in and a higher possible return, with market risk and taxed gains. PPF is government-backed with tax-free returns, but locks money for 15 years. Many investors use both within the ₹1.5 lakh limit.