If you invested in debt funds before 2023 and heard your CA mention "indexation," you may be wondering if that still applies to you — and what it even means for new investments. Here's the full picture.
Indexation adjusted your purchase cost upward using the Cost Inflation Index (CII) published by the government each year. This meant your "cost" for tax purposes went up to reflect inflation, which shrank your taxable capital gain — and therefore your tax bill.
Example (old rules, pre-April 2023): you bought a debt fund for ₹1,00,000 and sold it 4 years later for ₹1,30,000. Without indexation, your gain is ₹30,000. With indexation, if CII adjusted your cost to ₹1,15,000, your taxable gain shrank to ₹15,000 — taxed at 20%. That could roughly halve your tax outgo compared to slab-rate taxation.
| Purchase date | Holding period rule | Tax treatment |
|---|---|---|
| Before April 1, 2023 | Held > 3 years = long-term | 20% with indexation (old LTCG rule, grandfathered) |
| On/after April 1, 2023 | No long-term/short-term distinction for debt funds | Entire gain taxed at your income tax slab rate |
The Finance Act 2023 removed the indexation benefit and the concept of long-term capital gains entirely for debt-oriented mutual funds (funds with equity allocation of 35% or less) bought from April 1, 2023 onward. Gains on these are now added to your total income and taxed at your applicable slab — 20%, 30%, or whatever bracket you fall in.
Units bought before April 1, 2023 continue to get the old tax treatment — 20% with indexation for long-term holdings — because of grandfathering. It's only fresh purchases from that date onward that lose the benefit. If you have a mix of old and new units in the same fund, each purchase (each SIP instalment, in fact) is taxed based on its own purchase date.
The removal of indexation doesn't make debt funds pointless — it just removes one specific tax advantage. For short-to-medium term goals (1–3 years) where you value liquidity and don't want to lock into an FD's tenure, debt funds still make sense. For pure tax efficiency comparisons, run the numbers: compare your post-tax FD return against your post-tax expected debt fund return at your own slab rate before deciding.
If you're deciding where fixed-income money should even sit, our comparison on FD vs mutual fund walks through the return, safety, and liquidity trade-offs side by side.
Indexation on debt funds is gone for anything bought after April 1, 2023 — full stop. Don't let a fund's name or category alone decide your fixed-income allocation; check the purchase date, your own tax slab, and your actual liquidity need. The tax rules changed the maths, not necessarily the right answer for every investor.