Debt Mutual Funds Taxation 2026: The Complete Guide After the 2023 Rule Change — and the 2025 Update Nobody Noticed
By Nitish Bharadwaj · Published Sep 1, 2026 · 7 min
Debt mutual funds bought before April 1, 2023 still qualify for 20% LTCG with indexation after 36 months; units bought on or after that date are taxed entirely at slab rate under Section 50AA, regardless of holding period. A further amendment effective FY 2025-26 narrowed which funds Section 50AA applies to — only funds investing over 65% in debt and money market instruments are caught now, carving gold and international FoFs back out. This guide lays out which of your holdings fall where, and how to report each on your ITR.
Ask any mutual fund investor what changed for debt funds in 2023 and most can recite it: indexation is gone, gains are now taxed at slab rate. Ask what changed again in 2025 and almost nobody knows — because that update didn't make debt fund taxation harsher, it made the rule that decides which funds even count as a 'debt fund' for tax purposes noticeably narrower. Between the two changes, whether your specific holding gets hit by the harshest tax treatment in the mutual fund universe now depends on details most investors have never checked.
The Rule That Actually Matters: Section 50AA
Section 50AA of the Income Tax Act, introduced by the Finance Act 2023, created a category called 'Specified Mutual Funds.' Any unit of a Specified Mutual Fund acquired on or after April 1, 2023 loses long-term capital gains treatment entirely — the gain is deemed short-term capital gains no matter how many years the units are actually held, added straight to total income and taxed at slab rate. There's no 20% flat rate, no indexation, and no benefit to holding past any particular date.
Before vs After April 1, 2023 — What Actually Changed
| Units Bought Before Apr 1, 2023 | Units Bought On/After Apr 1, 2023 | |
|---|---|---|
| Holding ≤ 36 months | STCG — taxed at slab rate | Always treated as STCG — taxed at slab rate |
| Holding > 36 months | LTCG — 20% flat, with indexation | No LTCG treatment at all — still taxed at slab rate |
| Indexation benefit | Available | Not available, regardless of holding period |
| Grandfathering | Full old-rule treatment retained for pre-Apr 2023 units | N/A — new rule applies from the date of purchase |
This is why the same fund can carry two different tax treatments inside a single investor's portfolio: units bought through a SIP in 2021 retain the old indexed LTCG treatment if held past 36 months, while units bought through that very same SIP from April 2023 onward are taxed at slab rate no matter how long they're held. Each SIP instalment is its own purchase for tax purposes, so a long-running SIP straddles both rules simultaneously.
The 2025 Update: Section 50AA Got Narrower
The original 2023 definition of a Specified Mutual Fund was blunt: any fund investing not more than 35% in the equity shares of domestic companies qualified — which, as a side effect, swept in funds that had little to do with conventional debt investing, including gold fund-of-funds and international equity FoFs, since their underlying holdings sit outside 'domestic equity shares' entirely. An amendment effective from FY 2025-26 fixed this by rewriting the definition around what a fund actually holds: only funds investing more than 65% of their assets in debt and money market instruments (or fund-of-funds investing 65%+ in such funds) now count as Specified Mutual Funds. Gold FoFs, international equity funds, and similar structures that got caught by the old wording's side effect are no longer treated as debt funds for tax purposes — they follow the capital asset rules for their actual underlying category instead.
Which Common Debt Fund Categories Are Still Caught
The 65% debt/money-market threshold catches almost every fund investors actually call a 'debt fund' in everyday use — liquid funds, ultra-short and short-duration funds, corporate bond funds, banking & PSU debt funds, gilt funds, and target maturity funds all typically hold well above 65% in debt and money-market instruments, so Section 50AA's slab-rate treatment applies without exception to units of these bought on or after April 1, 2023. Arbitrage funds, despite behaving like low-volatility debt instruments, sit on the opposite side of this line entirely — their cash-market equity holdings clear the equity-oriented threshold, so they keep the more favourable 12.5% LTCG treatment instead.
How to Actually Report This on Your ITR
- Check your capital gains statement — most AMCs and platforms issue one that already separates gains by acquisition date and flags which units fall under Section 50AA
- Units bought before April 1, 2023 and held over 36 months go under the LTCG schedule with indexation, taxed at 20%
- Units bought on or after April 1, 2023 — regardless of how long held — go under the short-term capital gains schedule, added to total income at slab rate
- Don't rely on the fund's category label alone; if a scheme's actual asset allocation shifted after purchase, check the AMC's confirmation of Section 50AA applicability for the specific folio
Bottom Line
The 2023 change removed the tax edge debt funds held over FDs for anyone who bought after April 1 that year — gains are now taxed exactly like FD interest, at slab rate, with no indexation. What the 2025 narrowing changed is who that harsh rule actually applies to: pure debt and money-market-heavy funds are still fully caught, but gold and international FoFs that got swept in as a drafting side effect in 2023 are now taxed under their own category instead. Check your specific fund's debt allocation and your purchase date before assuming either the old or the new rule applies — both are still live in nearly every long-running debt fund portfolio today.
Frequently Asked Questions
Does the 2023 debt fund tax rule apply to all my old fund units too?
No. Units bought before April 1, 2023 are grandfathered and keep the old rule — LTCG at 20% with indexation if held over 36 months. Only units acquired on or after that date fall under Section 50AA and lose that treatment entirely.
Are hybrid or balanced funds affected by Section 50AA?
Only if the fund invests more than 65% of assets in debt and money-market instruments. Aggressive hybrid and balanced advantage funds typically hold well above 65% in equity and are taxed as equity-oriented funds instead, not as Specified Mutual Funds.
Did the FY 2025-26 amendment reduce tax on any existing debt fund holdings?
No — it narrowed which funds count as Specified Mutual Funds going forward, mainly benefiting gold and international fund-of-funds that were unintentionally caught by the 2023 definition. Conventional debt funds like liquid, corporate bond, and gilt funds remain fully covered by Section 50AA.