SEBI Categorisation & Rationalisation of Mutual Fund Schemes: large, mid and small cap rules explained

When the Securities and Exchange Board of India (SEBI) issued its Categorization and Rationalization of Mutual Fund Schemes circular on 26 February 2026 (ref HO/24/13/15(2)2026-IMD-RAC4/I/5764/2026), it re-anchored a definition that quietly governs where roughly 43% of every rupee in Indian mutual funds now sits, according to AMFI's January 2026 category map. The circular restates the market-capitalisation tiers on which every equity scheme is built: the top 100 companies by full market capitalisation are Large Cap, ranks 101 to 250 are Mid Cap, and every company from the 251st rank onwards is Small Cap. Those rankings are prepared twice a year from data submitted by the Association of Mutual Funds in India (AMFI).

Two categories that lean on this ranking confuse investors more than any others: the Multi Cap fund and the Flexi Cap fund. Both promise exposure across all three tiers, both sit inside an industry whose assets crossed Rs 81 lakh crore in May 2026, and both are marketed as one-fund equity solutions. Yet the SEBI rulebook treats them very differently, and that single regulatory distinction changes the risk you carry into a 10-year goal. This pulse breaks down Multi Cap versus Flexi Cap for a diversified equity core, using only the tier definitions in the 26 February 2026 circular and the tax rates in force for FY 2025-26.

Side-by-Side Comparison

The starting point is the tier map itself. SEBI fixes the boundaries by rank, not by a rupee figure, so the cut-offs move as the market moves. The 26 February 2026 circular restates them exactly as follows.

The rankings behind these tiers are published by AMFI, currently on a half-yearly basis, and every fund house must align its portfolio to the latest list. You can read the underlying concept in our market capitalisation glossary entry, which explains why a company's rank, not its share price, decides its tier.

A Multi Cap fund must, under SEBI's categorisation norms, hold a minimum of 75% of total assets in equity, with at least 25% each parked in Large Cap, Mid Cap and Small Cap stocks. That 25-25-25 floor is a hard rule: the fund manager cannot abandon small caps in a downturn, because the mandate forces a permanent minimum stake in each tier. A Flexi Cap fund, by contrast, needs only a minimum 65% of total assets in equity and equity-related instruments, with no tier-wise floor at all. The manager is free to run 80% large cap in a nervous market or tilt hard into mid and small caps when valuations look attractive.

That freedom is the whole design difference, and it flows directly from the two SEBI circulars that created these labels. The table below sets the mandates side by side.

The practical read is straightforward. A Multi Cap fund gives you a guaranteed, rules-based ride in small and mid caps, which historically carry higher volatility than the top 100. A Flexi Cap fund gives the manager the steering wheel, so the fund's true risk depends on the manager's current tilt rather than a fixed formula. Before you commit a monthly sum to either, model the horizon on our SIP calculator or run a one-time deployment through the lumpsum calculator, because the compounding gap between an 8% and a 13% assumed return over 15 years is far wider than most first-time investors expect.

One number worth checking on any scheme you shortlist is the expense ratio. SEBI's total expense ratio slabs cap the annual charge by asset size, but a small-cap-heavy Multi Cap fund and a large-cap-tilted Flexi Cap fund can differ by 40 to 80 basis points a year, and that gap compounds against you every single year you stay invested.

Tax Treatment

For an equity-oriented mutual fund, defined as one holding a minimum of 65% in domestic equity, the tax rules are identical for Multi Cap and Flexi Cap. The category label does not change your tax bill; only the holding period and the gain amount do. Both categories clear the 65% equity threshold by mandate, so both are taxed under the equity regime laid out in Sections 111A and 112A of the Income-tax Act, 1961.

Following the changes announced in Budget 2024 and effective from 23 July 2024, the rates below apply. These are the figures held in Oquilia's central rate configuration and confirmed on the income tax department's own portal.

So if you sell equity fund units held for more than 12 months and book a gain of Rs 3,00,000 in a financial year, the first Rs 1,25,000 is exempt and the remaining Rs 1,75,000 is taxed at 12.5%, giving a long-term capital gains liability of Rs 21,875 before cess. Sell the same units inside 12 months and the entire Rs 3,00,000 short-term gain is taxed at 20%, a liability of Rs 60,000 before the 4% health and education cess. The 3-to-1 gap in tax on an identical gain is the single strongest argument for holding both Multi Cap and Flexi Cap funds through their full intended horizon rather than trading them.

Two practical notes matter here. First, the Rs 1,25,000 LTCG exemption is a per-financial-year, per-taxpayer limit that pools across all your equity shares and equity funds, so it is not renewed per scheme. Second, dividends from either category are added to your total income and taxed at your slab rate, which is why a growth option usually beats a payout option for anyone above the 20% slab. Neither Multi Cap nor Flexi Cap units qualify for a Section 80C deduction; only ELSS funds carry that benefit, and only under the old tax regime.

Who Should Pick Which

The choice between the two categories is really a choice about who controls your small-cap exposure: the SEBI rulebook or the fund manager.

Pick a Multi Cap fund if you want a rules-based, permanently diversified equity engine and you are comfortable riding out small-cap drawdowns. The mandatory 25% floor in each tier means you always own a slice of the 251st-plus companies, which is where the highest long-run growth and the sharpest falls both tend to sit. This suits an investor with a 10-year-plus horizon and the temperament to ignore interim volatility, because the fund will not de-risk into large caps for you when small caps wobble. If you already hold a separate large-cap or index fund, a Multi Cap allocation layered on top can push your blended small and mid-cap weight higher than you intend, so check the overlap before adding it.

Pick a Flexi Cap fund if you want a single, actively managed core holding and you are prepared to trust a specific manager's judgement on when to move across tiers. Because the only hard rule is the 65% equity minimum, a well-run Flexi Cap fund can raise large-cap weight when small-cap valuations stretch, giving a smoother ride than the average Multi Cap fund in a correction. The flip side is manager risk: you must track the fund's actual tier split each half-year, because two Flexi Cap funds from different houses can behave nothing alike. This category suits investors who prefer delegating the tier call and who will review the portfolio at least once a year.

For a first-time equity investor building a core through a monthly SIP, a Flexi Cap fund is often the gentler entry point, because the manager can moderate small-cap risk. For a seasoned investor who wants deliberate, non-negotiable small and mid-cap exposure as part of a wider asset plan, the Multi Cap fund's 25-25-25 discipline is the more honest tool. Whichever you choose, size the commitment against a concrete goal, and remember that the PPF route at 7.1% for Q1 FY 2025-26 remains the sensible debt anchor beneath any equity core. Investors who prefer measuring a fund against its yardstick should read our benchmark index glossary entry before comparing returns, because a Multi Cap fund and a Flexi Cap fund are rarely measured against the same index.

A final structural point: SEBI's broader rationalisation work, including the debt fund liquidity and stress-test norms, is designed to keep category labels meaningful so that a fund called Multi Cap actually behaves like one. That is why the tier definitions in the 26 February 2026 circular matter to you as an end investor and not only to compliance teams.

FAQ

What exactly is the difference between a Multi Cap and a Flexi Cap fund?

A Multi Cap fund must hold at least 75% in equity with a minimum 25% each in Large Cap, Mid Cap and Small Cap stocks, giving a permanent presence in all three tiers. A Flexi Cap fund needs only 65% in equity and has no tier-wise floor, so the manager can freely tilt across market caps. Both draw on the same SEBI tier definitions from the 26 February 2026 categorisation circular.

How does SEBI decide which companies are large, mid or small cap?

SEBI ranks companies by full market capitalisation using data submitted by AMFI. The top 100 companies are Large Cap, ranks 101 to 250 are Mid Cap, and the 251st company onwards is Small Cap. AMFI currently publishes this ranking on a half-yearly basis, and fund houses must realign their schemes to the updated list.

Are Multi Cap and Flexi Cap funds taxed differently?

No. Both are equity-oriented funds holding at least 65% in domestic equity, so both follow the same equity tax rules. Gains on units held 12 months or less are short-term and taxed at 20% under Section 111A; gains on units held longer are long-term, taxed at 12.5% under Section 112A after a Rs 1,25,000 annual exemption, per the rates effective from 23 July 2024.

Which category carries more risk?

Structurally, a Multi Cap fund carries a guaranteed minimum 25% small-cap exposure, which raises volatility relative to a large-cap fund. A Flexi Cap fund's risk is manager-dependent: it can be lower than a Multi Cap fund when the manager holds large caps, or comparable when the manager tilts into small caps. Review the actual half-yearly tier split rather than relying on the label.

Can I claim a tax deduction on Multi Cap or Flexi Cap investments?

No. Neither category qualifies for a Section 80C deduction. Only ELSS funds offer that up to Rs 1,50,000 a year, and that benefit is available only under the old tax regime. Multi Cap and Flexi Cap units are held purely for growth, with tax arising only on redemption.

Should a first-time investor pick Multi Cap or Flexi Cap?

For a first monthly SIP, a Flexi Cap fund is often gentler because the manager can moderate small-cap risk during corrections. An investor who specifically wants disciplined, rules-based small and mid-cap exposure as part of a broader plan may prefer the Multi Cap fund's 25-25-25 mandate. Model either against your goal using an online SIP calculator before committing.

How often should I review my choice?

At least once every financial year, and ideally after each half-yearly AMFI ranking update, because tier reclassifications can shift a fund's holdings. For Flexi Cap funds in particular, check the disclosed tier split, since a change in manager or house view can materially alter the fund's true risk without any change to its category label.