“Hold a debt fund for three years and pay 20% with indexation” is still the rule most retail investors repeat. It was true - until the Finance Act 2023, and even then only for units bought before 1 April 2023. Two changes since have removed it for everyone, not just newer investors, reaching back to holdings that predate the first change.

The net effect: indexation on debt fund gains does not exist anywhere in the current rulebook - not for new investments, not for old ones. It wasn’t narrowed. It was withdrawn in two steps eleven months apart, and the second step reached backward to holdings the first step had explicitly protected.

Here is what that actually costs, on an illustrative example:

An investor bought ₹10,00,000 of a debt fund in 2018 and sells today for ₹16,00,000 - a ₹6,00,000 nominal gain.

The lower headline rate doesn’t mean a lower bill. On this holding, the investor now owes nearly twice as much, because the number the rate applies to almost tripled once indexation was removed.

The specific rupee figures here are illustrative - the real inflation adjustment depends on the exact years held and the cost inflation index the tax department publishes annually. The direction isn’t: for a holding old enough to have benefited meaningfully from indexation, swapping “20% of a shrunk gain” for “12.5% of the full gain” usually raises the bill, not lowers it. No subsequent budget has reinstated indexation for debt funds, in any form, for any holding period.

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