One rulebook to rule them all: SEBI's consolidated Master Circular for Mutual Funds (June 2024)

On 27 June 2024, the Securities and Exchange Board of India (SEBI) published its consolidated Master Circular for Mutual Funds, stitching years of scattered circulars into a single reference document and superseding the previous master circular. For an ordinary investor the document itself is 400-plus pages of operational plumbing, but its practical effect is simple: every rule that governs how an equity fund and a debt fund are built, priced, labelled and disclosed now lives in one place. That matters, because the two big building blocks of most Indian portfolios — equity mutual funds and debt mutual funds — are shaped by the very same rulebook yet behave, and are taxed, in almost opposite ways.

This Midday Investment Pulse uses the 27 June 2024 Master Circular as the anchor to compare equity funds versus debt funds for a long-term core portfolio. As of June 2026 the Indian mutual fund industry managed roughly Rs 84 lakh crore of assets, and monthly systematic investment plan (SIP) flows hit a record Rs 31,781 crore, per Association of Mutual Funds in India (AMFI) data. With that much money in motion, knowing which of these two fund families fits which goal — and what the taxman takes from each — is the single highest-value decision most investors make.

Side-by-Side Comparison

The Master Circular carries forward SEBI's scheme-categorisation framework (first issued in October 2017 and updated since) that forces every open-ended scheme into a defined box. Equity schemes sit in categories such as large cap, large and mid cap, mid cap, small cap, multi cap, flexi cap, value/contra, focused, dividend yield, sectoral/thematic and ELSS, while debt schemes are split across 16 duration- and credit-defined categories running from overnight and liquid funds up to gilt and long-duration funds. A large cap fund must hold at least 80% of its assets in the top 100 companies by full market capitalisation; a mid cap fund must hold at least 65% in the 101st to 250th companies; and a small cap fund at least 65% in the 251st company onward, with AMFI republishing that ranked list every six months.

Cost is the other lever the circular controls tightly. Under Regulation 52 of the SEBI (Mutual Funds) Regulations, 1996, carried into the Master Circular, the total expense ratio (TER) an open-ended equity scheme can charge is capped at 2.25% on the first Rs 500 crore of assets and tapers to 1.05% once assets cross Rs 50,000 crore; for debt schemes the caps are 25 basis points lower at each slab, running from 2.00% down to 0.80%. Funds may add up to 30 basis points for genuine inflows from beyond the top 30 cities (the "B-30" incentive), and since 1 January 2013 every scheme must also offer a lower-cost direct plan that strips out distributor commission.

Since the December 2020 product-labelling reforms, also consolidated into the Master Circular, every scheme must display a six-level riskometer — Low, Low to Moderate, Moderate, Moderately High, High and Very High — re-evaluated monthly and disclosed within 10 days of month-end. Equity funds cluster at the top of that scale, debt funds across the lower half, which is exactly why the two are meant to play different roles rather than compete head-to-head. A useful pull-out figure: on a Rs 10 lakh holding, a 1 percentage point gap between a 2.25% regular plan and a 1.25% direct plan is Rs 10,000 in the first year alone, before any compounding of that saving over a 10-year horizon.

Tax Treatment

Tax is where equity and debt funds diverge most sharply, and both regimes were rewritten by the Union Budget presented on 23 July 2024. An "equity-oriented fund" — defined as one holding at least 65% in domestic equity — attracts short-term capital gains (STCG) tax of 20% under Section 111A when units are held for 12 months or less, and long-term capital gains (LTCG) tax of 12.5% under Section 112A on gains above a Rs 1.25 lakh annual exemption when held for more than 12 months, per the Income Tax Department at incometax.gov.in. No indexation is available on either leg.

Debt funds lost their long-term advantage first. For units purchased on or after 1 April 2023, Section 50AA deems the gain short-term regardless of how long you hold, so it is added to your income and taxed at your slab rate with no indexation. Under the new tax regime for FY 2025-26 the slabs run 0% up to Rs 4 lakh, 5% to Rs 8 lakh, 10% to Rs 12 lakh, 15% to Rs 16 lakh, 20% to Rs 20 lakh, 25% to Rs 24 lakh and 30% above that, with a Section 87A rebate of up to Rs 60,000 making income up to Rs 12 lakh effectively tax-free. A 4% health and education cess applies on top of every figure below, and the surcharge in the new regime is capped at 25% even for the highest earners.

The gap is stark in rupees. Take a realised gain of Rs 10 lakh. On an equity fund held long-term, tax is 12.5% of (Rs 10,00,000 minus the Rs 1,25,000 exemption), or Rs 1,09,375, which grosses up to Rs 1,13,750 after 4% cess. On a post-April-2023 debt fund for an investor in the 30% bracket, the same Rs 10 lakh is taxed at slab, or Rs 3,00,000 plus cess of Rs 12,000, for Rs 3,12,000. The equity route keeps nearly Rs 2 lakh more of the same gain — a direct consequence of how the two products are treated under current law, not of any difference in fund quality.

Who Should Pick Which

The Master Circular standardises the products; your goal and time horizon decide the allocation. For any objective more than five years out — retirement, a child's higher education in 2035, or simply long-run wealth — equity funds are the workhorse, because the 12.5% LTCG rate and Rs 1.25 lakh annual exemption reward patience and the 5-plus-year horizon smooths the Very High riskometer reading into a manageable outcome. A monthly SIP into a diversified equity fund is the mechanism most of that Rs 31,781 crore of June 2026 flows is using, and it lets an investor average through volatility rather than time it.

Debt funds earn their place for the opposite reason: stability and access. Money you may need within one to three years — an emergency buffer, a house down-payment due in 2027, or a parked bonus — belongs in liquid, ultra-short or short-duration debt funds, where the Low to Moderate riskometer and daily liquidity matter more than headline return. The Section 50AA slab-rate treatment means a debt fund is now taxed much like a bank fixed deposit, so the choice between them turns on liquidity and convenience rather than tax, and you can model the trade-off with a lumpsum growth calculator before committing.

Two profiles deserve a specific nudge. First, tax-savers under the old regime: an ELSS fund is an equity category with a three-year lock-in that qualifies for the Section 80C deduction of up to Rs 1.5 lakh, combining equity's 12.5% LTCG treatment with an upfront deduction — a benefit that does not exist for ordinary equity or debt funds. Our own ELSS versus PPF comparison walks through where each wins. Second, cost-conscious investors of any stripe: switching from a regular to a direct plan captures the full TER saving the Master Circular already forces AMCs to disclose, and on a long-horizon equity holding that gap compounds into a materially larger corpus.

A balanced default many advisers reach for is a core of equity SIPs for goals beyond five years, a debt sleeve sized to 12-24 months of expenses for safety, and ELSS used only if you are in the old regime and still have 80C headroom. The Master Circular guarantees that whichever schemes you pick are categorised, cost-capped and risk-labelled to the same standard — the differentiation you are choosing is horizon and tax, not regulatory quality.

FAQ

What exactly did the June 2024 SEBI Master Circular change for investors?

Nothing about the rules themselves changed overnight — the 27 June 2024 circular is a consolidation, not a new policy. It merges the previously scattered circulars on categorisation, TER, valuation, riskometer, stewardship and disclosure into one document and supersedes the earlier master circular, so investors and AMCs now have a single source of truth. Fresh directions issued after that date are added to the same document, which SEBI hosts at sebi.gov.in.

Are equity funds always more tax-efficient than debt funds?

For long-term goals, yes under current law. Equity-oriented funds enjoy a 12.5% LTCG rate above a Rs 1.25 lakh annual exemption under Section 112A after 23 July 2024, while debt funds bought on or after 1 April 2023 are taxed at your slab rate under Section 50AA with no long-term concession. For a top-bracket investor that can mean roughly Rs 2 lakh more retained on a Rs 10 lakh gain, though the trade-off is equity's higher short-term volatility.

How much can a mutual fund charge me in fees?

The Master Circular caps the total expense ratio at 2.25% on the first Rs 500 crore of an equity scheme's assets, falling to 1.05% above Rs 50,000 crore; debt schemes are capped 25 basis points lower at each slab, from 2.00% down to 0.80%. Funds may add up to 30 basis points for inflows from beyond the top 30 cities. A direct plan, mandatory since 1 January 2013, always costs less than the regular plan because it excludes distributor commission.

What is the difference between a large cap, mid cap and small cap fund?

SEBI's categorisation, consolidated into the Master Circular, defines them by AMFI's six-monthly market-capitalisation list. A large cap fund holds at least 80% of assets in the top 100 companies, a mid cap fund at least 65% in the 101st to 250th companies, and a small cap fund at least 65% in the 251st company onward. The rules stop two funds in the same category from taking wildly different risks under the same label.

Is my old debt fund from before April 2023 still eligible for indexation?

Units of specified debt mutual funds purchased before 1 April 2023 fall outside Section 50AA, but the Budget of 23 July 2024 removed indexation for most asset classes and set a flat 12.5% LTCG rate. The 20%-with-indexation option was retained only for land, buildings and certain assets acquired before 23 July 2024, not for debt fund units. Confirm your specific holding's treatment with a tax adviser and the provisions at incometax.gov.in.

How do I read a fund's riskometer?

Since December 2020, every scheme shows a six-level riskometer — Low, Low to Moderate, Moderate, Moderately High, High and Very High — recalculated monthly and disclosed within 10 days of month-end. Equity funds typically read Moderately High to Very High, debt funds Low to Moderately High. Match the reading to your horizon: Very High is fine for a 10-year SIP but wrong for money you need in 2027.

Where can I model the equity-versus-debt decision for my own goals?

Start with the SIP calculator to project an equity investment over your horizon, the lumpsum calculator for a one-time debt or equity allocation, and the ELSS calculator if you want the 80C angle under the old regime. Pair the projection with the tax treatment above, and remember that past benchmark returns published by AMFI are indicative, not a promise of future performance.