Grandfathering Clause for LTCG: 31 Jan 2018 Cost and 2024 Rates

What the Grandfathering Clause Actually Protects

The grandfathering clause is the rule the government added when it brought back Long Term Capital Gains (LTCG) tax on listed shares and equity oriented mutual funds in the Finance Act 2018. Before that, long term equity gains were fully tax free. To avoid punishing investors for gains they had already earned over many years, the law drew a line in the sand at 31 January 2018. Any appreciation up to that date is shielded, and only the gain that builds up after it can be taxed.

The mechanism is simple once you see it. For equity and equity funds bought on or before 31 January 2018, your cost of acquisition for tax is not just your purchase price. It is the higher of your actual purchase price and the closing market price on 31 January 2018, but capped at your actual sale price so the rule can never create a fake loss. This is sometimes called the fair market value or FMV method. It only matters for the long term path, meaning a holding period above 12 months for listed equity.

Two things people constantly get wrong. First, grandfathering never applies to anything you bought on or after 1 February 2018, no matter how long you held it. For those, your real buy price is your cost. Second, grandfathering has nothing to do with short term trades or with futures and options. Day trades, swing trades held under a year, and F&O all sit outside this clause.

The Rates Changed in Budget 2024: What You Pay Now

This is the single most important update for anyone reading older articles. The famous 12.5% LTCG rate above a Rs 1.25 lakh exemption is no longer current. The Union Budget 2024, effective for transactions on or after 23 July 2024, raised the rates and the exemption limit. Getting this wrong can mean filing an incorrect tax return, so use the current numbers below.

For listed equity shares and equity oriented mutual funds, LTCG is now taxed at 12.5% on the gain that exceeds Rs 1.25 lakh in a financial year. The exemption rose from Rs 1 lakh to Rs 1.25 lakh, but the rate rose from 10% to 12.5%, and there is still no indexation benefit on listed equity. STCG on listed equity is now 20%, up from the old 15%, for holdings sold within 12 months. A health and education cess of 4% applies on top of the tax, and a surcharge can apply for very high incomes.

How the Cost of Acquisition Is Worked Out

The grandfathered cost follows a clear three step test set out in Section 55(2)(ac) of the Income Tax Act. You take your actual purchase price. You find the highest quoted price on 31 January 2018 for that scrip on a recognised exchange, often called the FMV. You also note your actual sale price. The cost of acquisition for tax is then the higher of the actual purchase price and the FMV, but it is then limited so it never goes above your actual sale price.

• Step 1: Take the higher of your actual buy price and the 31 January 2018 FMV.
• Step 2: Take the lower of the Step 1 figure and your actual sale price.
• Step 3: The Step 2 result is your cost of acquisition. Sale price minus this cost is your taxable LTCG.

The cap in Step 2 is what stops the rule from manufacturing a loss. If a stock that closed at Rs 150 on 31 January 2018 later fell and you sold at Rs 120, your grandfathered cost is capped at Rs 120, not Rs 150, so the clause cannot hand you an artificial loss to offset other gains. Reputable brokers and registrars publish the 31 January 2018 high prices, and your broker tax profit and loss report usually applies this automatically.

Worked Example: Reliance Shares Held Since 2015

Here is a fully worked, illustrative example using realistic figures for Reliance Industries, a large liquid NSE stock. Suppose you bought 200 shares of Reliance at Rs 480 each in 2015, a total cost of Rs 96,000. On 31 January 2018, assume the relevant fair market value was about Rs 940 per share. Today, in this example, you sell all 200 shares at Rs 1,450 each, receiving Rs 2,90,000 before charges. The sale happens after 23 July 2024, so the current rules apply.

• Actual buy price: Rs 480. FMV on 31 Jan 2018: Rs 940. Higher of the two: Rs 940.
• Sale price Rs 1,450 is above Rs 940, so the cap does not bite. Grandfathered cost per share: Rs 940.
• Taxable gain per share: Rs 1,450 minus Rs 940 equals Rs 510. Across 200 shares: Rs 1,02,000.
• This Rs 1,02,000 is below the Rs 1,25,000 LTCG exemption, so if it is your only long term equity gain this year, your LTCG tax is Rs 0.
• Without grandfathering, the gain would have been Rs 1,450 minus Rs 480 equals Rs 970 per share, or Rs 1,94,000 in total, which would have been taxable.

Notice the power of the clause. Your real economic profit was Rs 1,94,000, but for tax only Rs 1,02,000 counts because the years of growth up to 31 January 2018 were grandfathered. And because that Rs 1,02,000 sits under the Rs 1.25 lakh exemption, the tax in this example is nil. If instead the same trade produced a taxable gain of, say, Rs 3,00,000 in the year, only the amount above Rs 1.25 lakh would be taxed. That is Rs 1,75,000 at 12.5%, which is Rs 21,875, plus 4% cess of Rs 875, for about Rs 22,750 of tax.

Short Term Gains: Why Grandfathering Cannot Help You

If you hold listed equity for 12 months or less and sell, the profit is a Short Term Capital Gain (STCG), now taxed at a flat 20% after Budget 2024, plus 4% cess. There is no annual exemption like the Rs 1.25 lakh available for STCG, and the grandfathering clause simply does not apply because grandfathering only ever touches the long term cost of pre 2018 purchases.

An example shows the gap clearly. Suppose you buy 100 shares of HDFC Bank at Rs 1,500 and sell four months later at Rs 1,700. That is a Rs 200 per share gain, or Rs 20,000 short term. At 20% plus 4% cess, the tax is about Rs 4,160. The same Rs 20,000 as a long term gain, if it were under your Rs 1.25 lakh limit, would have been tax free. Holding period is therefore one of the biggest levers a retail investor controls.

F&O and Intraday Are Outside This Clause Entirely

Traders often confuse capital gains rules with how futures and options are taxed. F&O profit is treated as non speculative business income under Indian tax law, not as capital gains, so it is taxed at your normal income tax slab rate, not at 12.5% or 20%, and the grandfathering clause has no relevance to it. Intraday equity, where you buy and sell the same day without taking delivery, is treated as speculative business income, again taxed at slab rates.

Consider an illustrative Nifty options trade. Nifty has a lot size of 65. You buy one weekly 24,000 call at a premium of Rs 120 and sell it the same week at Rs 180. The gain is Rs 60 per unit times 75, which is Rs 4,500 per lot before charges. STT on options is charged at 0.15% on the sell premium value for options that are sold, plus brokerage, exchange transaction charges, GST and stamp duty, which together might eat Rs 100 to Rs 150 on a single lot. The net profit is then added to your business income and taxed at your slab rate. None of the 12.5% LTCG, the Rs 1.25 lakh exemption, or the grandfathering FMV step has any role here.

Equity Mutual Funds and the 31 January 2018 NAV

Grandfathering works the same way for equity oriented mutual funds, those holding at least 65% in Indian equities, as it does for direct shares. For units bought on or before 31 January 2018, the cost is the higher of your actual purchase NAV and the NAV declared on 31 January 2018, again capped at the redemption NAV. Fund houses and registrars such as CAMS and KFintech publish the 31 January 2018 NAVs, and your consolidated capital gains statement usually applies this for you.

If you invest through a Systematic Investment Plan, each instalment is a separate purchase with its own date and NAV. Only the instalments made on or before 31 January 2018 can be grandfathered. Every SIP instalment from 1 February 2018 onwards uses its real purchase NAV as cost, and holding period is counted instalment by instalment, so the oldest units may be long term while newer ones are still short term.

Common Mistakes That Lead to Wrong Tax

• Using the old 10% rate and Rs 1 lakh exemption for a sale made on or after 23 July 2024. The current figures are 12.5% and Rs 1.25 lakh.
• Applying grandfathering to shares bought after 31 January 2018. It only covers purchases on or before that date.
• Forgetting the Step 2 cap, which limits the grandfathered cost to the actual sale price and prevents an artificial loss.
• Trying to grandfather F&O or intraday profits. Those are business income at slab rates and are never grandfathered.
• Ignoring the per financial year nature of the Rs 1.25 lakh exemption, which resets each year and is not per scrip.
• Confusing STT, a transaction charge on the trade, with capital gains tax on the profit. They are separate.

SEBI, Reporting and Where the Rules Come From

SEBI regulates the exchanges, brokers and mutual funds, and its rules on segregation, settlement and disclosure are why your broker can produce an accurate, audit ready capital gains statement. The grandfathering rule itself is a tax law, set by the Finance Act and administered by the Income Tax Department, not by SEBI. When you file your return, long term and short term equity gains are reported in the capital gains schedules, and Schedule 112A is specifically built to capture the scrip by scrip details including the 31 January 2018 FMV.

Always reconcile your broker tax profit and loss report with your own records, especially for shares transferred between demat accounts or received as bonus, rights or gifts, where the cost and date rules can be subtle. When the figures are large, a qualified chartered accountant is worth the fee. Rates and limits can change in any Union Budget, so confirm the current position before you act on a big sale.

Quick Decision Checklist Before You Sell

• Did I buy on or before 31 January 2018? If yes, the grandfathered FMV may lower my taxable gain.
• Have I held listed equity for more than 12 months? If yes, it is LTCG at 12.5% above Rs 1.25 lakh. If not, it is STCG at 20%.
• Is my total long term equity gain this year above Rs 1.25 lakh? Only the excess is taxed.
• Is this actually F&O or intraday? If yes, it is business income at slab rates, and none of the above applies.
• Have I accounted for STT and other charges that reduce my net proceeds?

Sources and Further Reading

For authoritative data and further reading on this topic, refer to Income Tax Department, SEBI (Securities and Exchange Board of India) and Zerodha Varsity. Always confirm current rules, rates and contract specifications on the official source before you trade.