In the 30% slab, debt funds are rarely worth it on tax alone. Since April 2023 their gains are taxed at your slab, like FD interest, and the main tax edge left, paying once on redemption instead of every year, is worth about ₹10,600 on ₹10 lakh over five years at a 6.5% FD rate. Yusuf's sums show what a fund must earn to win, and when the deferral pays.

What changed for debt funds in 2023?

Section 50AA of the 1961 Act taxes gains on debt fund units bought from 1 April 2023 at your slab, however long you hold them, for any fund with more than 65% in debt. Before that, units held over three years paid 20% with indexation, which beat FDs in a high slab. Units bought before April 2023 now pay 12.5% after 24 months; debt fund taxation for every fund type, hybrids included, is in how mutual fund gains are taxed.

What survives is timing: FD interest is taxed every year as it accrues, a debt fund's gain only in the year you redeem, with no TDS, so a large redemption can mean advance tax.

How much does a debt fund's tax deferral save on ₹10 lakh?

Yusuf earns ₹38 lakh a year, taxable income ₹37,25,000 under the new regime, so every extra rupee of interest or gain costs 31.2% with cess. He is parking ₹10,00,000 for a goal five years away.

One-to-five-year FDs paid about 6% to 6.75% in October 2026, varying by bank, as the FD vs mutual funds guide shows. At 6.5% compounded quarterly, 6.66% a year effective, his FD matures at ₹13,80,420. Paying 31.2% on the interest every year leaves about 4.58% a year compounding, and he ends with ₹12,51,090.

Taxed once at the end instead, as in a debt fund, the same ₹3,80,420 leaves ₹12,61,729. That ₹10,639 is the whole value of the deferral, about 0.24 percentage points a year.

Costs take it back. Assume the fund's bonds earn the same 6.66% and its direct plan charges 0.3% a year, leaving about 6.36% (October 2026 assumptions, not forecasts). The fund grows to ₹13,61,105; after 31.2% on the ₹3,61,105 gain he keeps ₹12,48,440, ₹2,650 less than the FD. The test: the fund must earn about 6.42% a year after costs to match the FD, so any cost above those 0.24 points uses up the deferral.

Does it change at a lower salary or after retiring?

At a lower salary it gets worse, because five years of gain land in one year and can climb a slab. Same sums, sold on that salary:

Salary (taxable income) FD, tax paid yearly Debt fund, sold in year five Fund behind by
₹18 lakh (₹17,25,000) ₹12,93,073 ₹12,81,518 ₹11,555
₹22 lakh (₹21,25,000) ₹12,71,943 ₹12,62,740 ₹9,203
₹38 lakh (₹37,25,000) ₹12,51,090 ₹12,48,440 ₹2,650

At ₹18 lakh, the ₹3,61,105 gain lifts taxable income to ₹20,86,105, so ₹86,105 of it pays 26% instead of 20.8%, while the FD's yearly interest stays in the 20% slab. At ₹22 lakh the same ₹86,105 crosses ₹24 lakh into the 30% slab. Selling half in March and half in April, across two financial years, narrows the first two gaps to ₹7,078 and ₹4,725.

The deferral pays when the sale falls in a lower-income year. If Yusuf redeems in a year with no other income, such as a career break, the whole gain sits under the ₹4,00,000 nil slab and he keeps ₹13,61,105, ₹1,10,015 more than the FD. After retiring, selling slices each year does the same; systematic withdrawal plans work that out.

What risks does a debt fund carry that an FD does not?

An FD is insured by DICGC, the RBI's deposit insurer, up to ₹5 lakh per depositor per bank. A debt fund is not, and carries two risks.

Duration risk: bond prices fall when interest rates rise. Macaulay duration says roughly how much: at three years, a one percentage point rise in yields cuts the fund's NAV (its price per unit) by a little under 3%. SEBI's February 2026 categories set each fund's band, from 3 to 6 months (Ultra Short Term) to over 7 years (Long Term); for money due on a date, a shorter band means a late rate rise costs less.

Credit risk: a borrower can default. A Corporate Bond Fund must keep at least 80% in bonds rated AA+ and above, while a Credit Risk Fund must keep at least 65% in bonds rated AA and below, which is where its extra yield comes from.

When does a debt fund still make sense?

Liquidity is the clearest case. A liquid fund usually pays out by the next business day, with a graded exit load of 0.0070% to 0.0045% only within six days of investing and none from the seventh, while banks usually cut 0.5 to 1 percentage point from the rate on an FD broken early (2026, varies by bank). That suits money needed at short notice, as the emergency fund guide explains.

One smaller edge: gains under section 50AA count as short-term capital gains, so a short-term capital loss can be set off against them; FD interest cannot absorb one.

Dhi maps your debt funds, deposits and other investments to the goals they are meant for and answers questions like this one from your own numbers. Dhi nudges you when something needs attention, earns no commissions and never mis-sells.

Frequently asked questions

Those units are past 24 months, so selling them now pays 12.5% on the gain so far, without indexation, plus 4% cess (sales from 23 July 2024). New debt fund units bought with the money are taxed at your slab, 31.2% in the 30% slab, so the switch carries a tax cost the new fund's return has to make up.
No. An arbitrage fund keeps at least 65% in hedged Indian equity, so it is taxed as an equity fund: 20% on gains within 12 months, and 12.5% after that above ₹1.25 lakh a year shared across all your long-term listed equity gains, plus cess, for sales from 23 July 2024. Its return tracks short-term interest rates and is not fixed, which is why investors in the 30% slab compare it with debt funds for parking money.
Roughly as long as its Macaulay duration: as its bonds mature and are replaced, the higher yields on new bonds make up the fall in price, so a fund with a three-year duration takes about three years. A default is different, because that loss lasts unless the borrower later repays.

This is general information for salaried individuals in India, not personalised financial advice.