How to apply the grandfathering rule for LTCG on pre-2018 mutual fund holdings
The grandfathering rule for LTCG on pre-2018 equity mutual fund holdings was introduced in Finance Act 2018 alongside the new LTCG tax. It protects investors from being taxed on gains that accumulated when LTCG on equity was exempt. The mechanism is straightforward: substitute higher of actual cost or FMV as on 31 January 2018, capped at sale price.
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Step-by-step procedure
See the procedure infobox above.
Why grandfathering exists
Pre-1 February 2018:
- Equity MF gains held > 12 months were tax-exempt (no LTCG tax).
- Investors expected this tax-free treatment forever.
Finance Act 2018:
- Introduced 10% LTCG on equity (above Rs 1 lakh) from 1 Feb 2018.
- Risk: would-be-tax-free gains accrued before 2018 would now be taxed.
Grandfathering protected investors: gains accrued up to 31 Jan 2018 remain effectively untaxed (cost basis substituted by FMV on that date).
Formula
For an equity MF unit:
Adjusted Cost = MIN(MAX(Actual Cost, FMV 31-Jan-2018), Sale Price)
Translated:
- If actual cost > FMV: use actual cost (no grandfathering benefit).
- If actual cost < FMV: use FMV (full grandfathering of pre-2018 gain).
- If sale price < FMV: use sale price (LTCG = 0; no loss either).
LTCG = Sale Price - Adjusted Cost.
Worked examples
Example 1: Pre-2018 gain grandfathered
- Bought 2015: Rs 100.
- FMV 31 Jan 2018: Rs 200.
- Sold 2024: Rs 350.
- Adjusted cost: MAX(100, 200) = 200, capped at 350: 200.
- LTCG: 350 - 200 = Rs 150.
Without grandfathering: LTCG = Rs 250. Saved Rs 100 of LTCG taxable.
Example 2: Sale below FMV
- Bought 2015: Rs 100.
- FMV 31 Jan 2018: Rs 200.
- Sold 2024: Rs 150.
- Adjusted cost: MIN(MAX(100, 200), 150) = MIN(200, 150) = 150.
- LTCG: 150 - 150 = 0.
Grandfathering prevents loss claim but eliminates tax.
Example 3: Post-2018 purchase
- Bought July 2018: Rs 100.
- FMV 31 Jan 2018: NA (not applicable).
- Sold 2024: Rs 300.
- Adjusted cost: 100 (actual cost; grandfathering doesn’t apply).
- LTCG: 200.
Source of FMV NAV
| Source | Quality |
|---|---|
| AMC capital gains statement | Authoritative; AMC computes |
| AMC factsheet archive | NAV as on 31 Jan 2018 |
| AMFI archives | Industry-wide reference |
| IT portal (during ITR filing) | May auto-populate |
| Schedule 112A within ITR utility | Auto-validates |
Applicability beyond MFs
Grandfathering also applies to:
- Listed equity shares acquired pre-2018.
- Equity-oriented MF units.
- Equity-mode hybrid MF units.
Doesn’t apply to:
- Pure debt MFs.
- ULIP-derived units.
- International FoFs (treated as debt post FA 2023).
See also
- How to report MF capital gains in ITR
- How to fill Schedule CG (MF)
- How to choose ITR form for MF
- How to set off MF capital losses
- How to carry forward MF capital losses
- How to handle switch tax in ITR
- How to handle SWP tax in ITR
- How to exit MF tax-efficiently
- How to set up your first ELSS investment
- How to compute LTCG with grandfathering (Zerodha)
- Grandfathering rule for LTCG
- Section 112A (LTCG)
- Section 111A (STCG)
- Finance Act 2018 (LTCG introduction)
- Equity mutual fund taxation in India
- Fair Market Value (FMV)
- Capital gains statement (MF)
- SIP tax FIFO
- ELSS (Equity Linked Savings Scheme)
- Mutual funds in India
- AMFI
- SEBI
External references
References
- Income Tax Act, 1961, Section 112A (introduced by Finance Act 2018).
- CBDT Circular on grandfathering computation.
- Finance Act, 2018.
- AMFI Best Practice Guidelines on grandfathering reporting.