How the Grandfathering Rule Affects Your Equity Mutual Fund Tax

Buying equity mutual fund units before 31 January 2018 does not automatically make your gains tax-free. The grandfathering rule introduced with the reintroduction of Long-Term Capital Gains (LTCG) tax in 2018 means you must carefully compute taxable gains by comparing your actual purchase cost with the fair market value (FMV) as on 31 January 2018. This article explains how this rule works and guides you through calculating your tax liability accurately.

Quick primer: LTCG on equity mutual funds (Section 112A) — rate, threshold and basic rules

What is taxed and what’s not

Section 112A of the Income Tax Act, introduced by the Finance Act 2018, taxes LTCG arising from the transfer of equity shares and units of equity-oriented mutual funds. Gains exceeding Rs 1 lakh in a financial year are taxed at 10%. Gains up to Rs 1 lakh are exempt annually. Short-term capital gains (STCG) continue to be taxed separately at 15%.

Rate and exemption limit

The LTCG tax rate is 10% on gains exceeding Rs 1 lakh per financial year, without the benefit of indexation. This means you cannot adjust your purchase cost for inflation when calculating gains.

Indexation and STT — quick notes

Indexation benefit is not available for LTCG on equity mutual funds under Section 112A. Securities Transaction Tax (STT) must be paid on the sale of units for the LTCG provisions to apply. Typically, equity mutual funds pay STT on redemption, but verify your transaction details.

What is the grandfathering rule? (cut-off date and the FMV concept)

Meaning of FMV on 31 Jan 2018 for mutual funds (NAV vs market price)

The grandfathering rule protects gains accrued up to 31 January 2018. For units acquired on or before this date, the cost used to compute LTCG is the higher of the actual purchase cost or the FMV as on 31 January 2018. For mutual funds, FMV is the Net Asset Value (NAV) on that date, as published by the AMC or registrar.

Which holdings qualify for grandfathering?

Only units purchased on or before 31 January 2018 qualify. Units bought after this date do not get grandfathering and are fully taxable on gains. For SIP investors, units purchased before and after the cut-off date must be treated separately.

How to compute taxable LTCG with grandfathering — step-by-step

Step 1: Identify lots (pre and post cut-off)

Separate your mutual fund units into lots based on purchase date: those acquired on or before 31 January 2018 and those acquired after.

Step 2: Find per-unit FMV on 31 Jan 2018

Obtain the NAV per unit on 31 January 2018 from your AMC or registrar statements. This is your FMV for grandfathering.

Step 3: Compute exempt portion and taxable portion

For each pre-cut-off lot, calculate the exempt gain as the difference between FMV on 31 Jan 2018 and your actual purchase cost. Any gain beyond FMV is taxable. For post-cut-off units, the entire gain (sale price minus purchase cost) is taxable.

Step 4: Apply Rs 1 lakh yearly exemption and 10% tax on remainder

Aggregate all taxable gains in the financial year. Deduct the Rs 1 lakh exemption. The remaining gain is taxed at 10% without indexation.

Step 5: Consider STT and TDS implications

Ensure STT was paid on your redemption. For NRIs, TDS is deducted at source on redemption proceeds. You may claim treaty relief under DTAA by filing returns appropriately.

Worked examples (lump sum, SIPs, partial redemptions, bonus units, mergers)

Example A: Lump sum bought before cut-off and sold after

An investor bought 1,000 units at Rs 100 each in Dec 2017. NAV on 31 Jan 2018 was Rs 120. The investor sells all units in 2023 at Rs 150. Exempt gain per unit is Rs 20 (120 – 100). Taxable gain per unit is Rs 30 (150 – 120). Total taxable gain is Rs 30,000 (1,000 x 30). After Rs 1 lakh exemption, tax is 10% on Rs 20,000 = Rs 2,000.

Example B: SIP spanning cut-off (units purchased both before and after)

An investor started SIP in 2016 and continued till 2020. Units bought before 31 Jan 2018 get grandfathering; those after do not. Calculate exempt and taxable gains separately per lot using FMV on 31 Jan 2018 for pre-cut-off units.

Example C: Partial redemption — which units are considered sold?

Partial redemptions are typically matched on a First-In-First-Out (FIFO) basis. Older units (pre-cut-off) are considered sold first unless specified. This affects tax calculation as pre-cut-off units have grandfathering.

Example D: Bonus units or unit split before cut-off

Bonus units increase your total units. You must apportion the original cost and FMV on 31 Jan 2018 across the increased units. For example, if you had 1,000 units and received 200 bonus units, your cost and FMV per unit adjust accordingly.

Example E: Scheme merger after cut-off

In case of scheme mergers, units of the old scheme are converted to new units. The FMV on 31 Jan 2018 and cost basis carry over proportionally. Maintain records of merger ratios and NAVs for accurate computation.

Special situations: NRIs, business trusts, and STT considerations

NRI tax and TDS on redemption — practical steps

NRIs face TDS on redemption proceeds at 10% or higher rates. They should collect TDS certificates and file returns to claim refunds or treaty benefits.

DTAA considerations — when treaty relief applies

NRIs can claim relief under Double Taxation Avoidance Agreements by submitting relevant forms and documentation to tax authorities.

STT requirements and listed vs unlisted units

STT must be paid on redemption for LTCG tax to apply under Section 112A. Verify your transaction details to confirm STT payment.

Units of business trusts — differences

Business trusts may have different tax treatment. Consult a tax advisor for specifics.

Practical checklist before you redeem (documents, NAVs, tax filing tips)

Download unit statements and NAV history from AMC or registrars like CAMS/KFintech.
Obtain NAV on 31 Jan 2018 for all schemes held.
Keep records of corporate actions such as bonus units, splits, and mergers.
Maintain transaction statements showing purchase and redemption dates and prices.
Provide these documents to your tax advisor for accurate filing.

Common mistakes and how to avoid them

Assuming all gains on pre-31 Jan 2018 units are tax-free — always compute using FMV.
Using total purchase cost without comparing to FMV on 31 Jan 2018.
Mixing units bought before and after cut-off without separate accounting.
Ignoring corporate actions that affect unit counts and cost basis.
Not maintaining NAV and unit statements for 31 Jan 2018.
Overlooking the Rs 1 lakh exemption threshold per financial year.

Decision framework: When to sell, hold or switch

Tax considerations should not override your investment goals. If you hold both pre- and post-cut-off units, consider selling post-cut-off units first to minimize tax. Spread redemptions across financial years to utilize the Rs 1 lakh exemption fully. Always balance tax impact with your financial objectives and market conditions.

Authoritative references and where to get help

For personalized advice, consider consulting a tax professional experienced in securities taxation, especially if you are an NRI or have complex portfolios.

Understanding the grandfathering rule and accurately computing your LTCG tax can save you from unexpected tax liabilities and help you plan redemptions efficiently. Download your AMC statements for 31 January 2018 and start your calculations with confidence.

If you want to explore goal-based financial planning or need help with tax-efficient mutual fund investments, you can start a conversation with a Growthvine advisor or visit growthvine.in.

Disclosure: Growthvine Capital is an AMFI Registered Mutual Fund Distributor (ARN-176753). Mutual Fund and SIF investments are subject to market risks; please read all scheme-related documents carefully. PMS and AIF products, where referenced, are distributed in association with SEBI-registered providers and are subject to their respective regulations and risk profiles. Past performance is not necessarily indicative of future returns. This article is for educational purposes only and is not investment, tax, or legal advice.