Maximum Marginal Rate
Also written MMR · Maximum Marginal Rate (MMR) · Maximum Marginal Rate (Section 2(29C))
The highest slab rate of income tax, applied to a Category III AIF's business income at fund level because the fund gets no pass-through — 30% before surcharge and cess.
In plain language
Categories I and II are "Investment Funds" under Section 115UB of the Income Tax Act, so their income is taxed in the hands of unit holders. Category III is excluded from that definition, and the bill for the exclusion is the Maximum Marginal Rate.
Where a Category III AIF is set up as a trust — as most are — sub-section (4) of Section 115UB charges its total income at MMR, currently 30%, payable by the trustee as representative assessee. Surcharge and cess then sit on top.
Every unit holder in the fund bears that cost indirectly, whatever their own tax position. A charitable trust, a loss-making company and an individual in the 5% slab all pay through the fund at the same rate.
How it works
MMR does not apply to everything a Category III AIF earns. The dividing line is the head of income:
- Profits or gains from business or profession — which includes all gains from futures and options, and gains on securities the fund treats as stock-in-trade — is taxed at MMR in the fund.
- Capital gains and income from other sources may be assessed in the trustee's hands as representative assessee under Section 161(1), in the same manner and to the same extent as they would be on the beneficiaries — so the concessional capital gains rates can apply instead of MMR.
That second limb only holds for an irrevocable, determinate trust. Make the trust indeterminate and Section 164 applies MMR to everything; make the transfer revocable and Section 61 taxes the income in the transferor's hands and no pass-through survives at all.
The workbook adds a warning worth remembering: the concessional capital gains rates should take precedence over MMR under Section 164 — but the income tax authorities have a right to take a contrary view and charge that income at MMR.
The formula
Base tax = Business income × 30%
Surcharge = Base tax × surcharge rate (25% above Rs 2 crore of income)
Health & Education Cess = (Base tax + Surcharge) × 4%
Effective MMR = 30% × 1.25 × 1.04 = 39.00%
Surcharge for individuals, HUFs, AoPs and BoIs: 10% above Rs 50 lakh, 15% above Rs 1 crore, 25% above Rs 2 crore. For domestic companies: 7% above Rs 1 crore, 12% above Rs 10 crore, and a flat 10% for companies opting for the 22% rate.
A worked example
A Category III AIF set up as an irrevocable, determinate trust earns, in a financial year:
| Stream | Amount | Head |
|---|---|---|
| Gains on index futures and options | Rs 12 crore | Business income |
| Long-term gains on listed equity (STT paid) | Rs 5 crore | Capital gains |
The business income, at fund level:
Tax at MMR 30% × Rs 12,00,00,000 = Rs 3,60,00,000
Surcharge 25% × Rs 3,60,00,000 = Rs 90,00,000
---------------
Rs 4,50,00,000
Cess 4% × Rs 4,50,00,000 = Rs 18,00,000
---------------
Total tax Rs 4,68,00,000
That is 39% of Rs 12 crore, paid by the trustee, before a rupee reaches any investor.
The capital gains, in the unit holders' hands. An investor holding 10% of the fund is attributed Rs 50 lakh of long-term gain. Under Section 112A, gains above Rs 1.25 lakh are taxed at 12.5%:
(Rs 50,00,000 − Rs 1,25,000) × 12.5% = Rs 6,09,375 (before surcharge and cess)
Rs 12.19 lakh of tax per crore of business income versus Rs 1.22 lakh per crore of long-term capital gain. The same rupee of economic return costs ten times as much tax depending on which head it falls under — which is exactly why the business-income-versus-capital-gains characterisation is litigated, and why CBDT had to issue circulars on it.
Why NISM asks about it
Chapter 9 (Taxation) is built around this number and it is the highest-yield topic in the paper. Expect: which category of AIF is denied pass-through (Category III); at what rate a Category III AIF set up as a trust is taxed (MMR, 30%); which head of income attracts MMR at fund level (profits and gains from business or profession, including all derivatives gains); and computational questions that add surcharge and cess to reach an effective rate. The surcharge table is examined directly.
Common exam traps
- MMR is 30% before surcharge and cess. If the question asks for the effective rate, build it up; if it asks for MMR, the answer is 30%.
- MMR applies at fund level only to business income. Capital gains and income from other sources in an irrevocable determinate trust can go to the unit holders at their own rates.
- All derivatives gains are business income. Futures and options gains attract MMR however long the position was held — there is no long-term treatment.
- A Company or LLP Category III AIF is not taxed at MMR. Sub-section (4) charges it at the rates applicable to a company or an LLP; MMR is the trust rule.
- Cess is 4% on tax plus surcharge, not 4% on income. Surcharge is a percentage of the tax, not of the income.
- Category I and II AIFs are pass-through under Section 115UB. Do not carry that across to Category III — it is the single most common confusion in this chapter.
Check yourself
1.Which trust structure is eligible to pass through income in the nature of Capital Gains to its investors?
- a)Determinate Irrevocable Trust
- b)Determinate Revocable Trust
- c)Indeterminate Irrevocable Trust
- d)Indeterminate Revocable Trust
Show the answer
Answer: (a) Determinate Irrevocable Trust
This is the workbook's own sample question. Both conditions must hold. Revocability triggers Section 61, under which all income arising by virtue of a revocable transfer shall be chargeable to tax as the income of the transferor, so no pass-through is available. Indeterminacy triggers Section 164, under which the trustee pays income tax at the Maximum Marginal Rate and, since the beneficiaries are not known, Section 166 will not be invoked and no income will be taxed in the hands of the unit holders. Only a determinate irrevocable trust passes capital gains through.
2.Which of the following would NOT be taxed as Income from Other Sources for a Category III AIF?
- a)Dividend income where shares are held as investments
- b)Interest income
- c)Income from transactions in exchange-traded derivatives
- d)Deemed income on investment in shares below fair market value under Section 56(2)(x)
Show the answer
Answer: (c) Income from transactions in exchange-traded derivatives
This is the workbook's own sample question. Derivatives income has no elective treatment: any gains arising from these transactions shall be treated as Profits and Gains from Business and Profession and the fund should be liable to pay tax on such income at the Maximum Marginal Rate of Tax. Dividend on shares held as investments is income from other sources with only the 20 per cent interest deduction; interest income and Section 56(2)(x) deemed income likewise fall under that head.
3.A Category III AIF is denied tax pass-through status because:
- a)it is prohibited from being formed as a trust
- b)the definition of Investment Fund in Section 115UB covers only Category I and Category II AIFs
- c)it invests in derivatives
- d)its investors are high net-worth individuals
Show the answer
Answer: (b) the definition of Investment Fund in Section 115UB covers only Category I and Category II AIFs
Section 115UB defines an Investment Fund as a fund in India formed as a trust, company, LLP or body corporate which has been granted a certificate of registration as a Category I or a Category II Alternative Investment Fund. Accordingly, Category III AIFs are not considered as Investment Funds and hence, not accorded the tax pass-through status, and the income earned by such a fund is taxed at the Maximum Marginal Rate, in the hands of the Fund. The exclusion is definitional, not a consequence of what the fund invests in or who invests in it.
Where this is taught
- Series XIX-B · Chapter 9: Taxationintroduced here
- Series XIX-C · Chapter 16: Taxationintroduced here
- Series XIX-E · Chapter 14: Taxationintroduced here
- Series XIX-D · Chapter 13: Taxationintroduced here
Related terms
- Category III AIFThe AIF category for funds running diverse or complex trading strategies with leverage — hedge funds and their kin — and the only category denied tax pass-through status.
- Minimum Alternate TaxA floor tax on a company's book profits under Section 115JB, payable when it exceeds tax computed the normal way — which catches corporate investors receiving Category III AIF distributions.
- Securities Transaction TaxA central government tax collected by the exchange on the sell side of every futures and option trade — 0.05% of futures traded value, 0.15% of option premium, and 0.15% of settlement price on exercise.
- Determinate trustA trust whose beneficiaries and their beneficial interests are ascertainable from the trust deed throughout its life — the structure that lets a Category III AIF avoid MMR on non-business income.
- Dividend Distribution TaxThe tax a mutual fund scheme itself deducted before paying a dividend, abolished from April 2020 — since when the payout has instead been taxed in the investor's own hands at their slab rate.
- Tax Residency CertificateThe certificate a non-resident investor obtains from its home tax authority to claim benefits under a Double Taxation Avoidance Agreement — without it, Indian domestic rates apply.
- Portfolio Management ServicesA tailored investment service where the client owns the securities directly in their own name, regulated under the SEBI (Portfolio Managers) Regulations, with a minimum investment of Rs 50 lakh.
- Indeterminate TrustA trust whose beneficiaries and their beneficial interests cannot be ascertained from the trust deed. For an AIF, the trustee is taxed on the whole income at the maximum marginal rate under Section 164.
- Investment FundUnder Section 115UB, a Category I or Category II AIF (or an IFSCA-regulated fund) established in India — the only AIFs given tax pass-through. Category III AIFs are outside the definition.
- Representative AssesseeThe capacity in which the trustee of an AIF set up as a trust is assessed to income tax under Sections 161 and 164 — paying on behalf of the beneficiaries so the same income is not taxed twice.
- Revocable trustA trust the settlor can revoke at his discretion or with the beneficiaries' consent. Income from a revocable transfer is taxed as the transferor's, so an AIF set up this way gets no pass-through.
- Health and Education CessA 4% cess levied on the aggregate of income tax and surcharge payable by a Category III AIF or its investors, raising the effective tax rate on every income head it applies to.
- Short-term capital assetA capital asset taxed as short-term: listed securities held 12 months or less, unlisted securities 24 months or less, plus MLDs, specified mutual funds and unlisted bonds deemed short-term whatever the holding.
- Tax yearUnder the Income Tax Act, 2025, the 12-month financial year beginning 1 April — or, for a newly set-up business or profession, the period from set-up to the end of that financial year.
- Revocable transferA transfer to a trust whose document lets the transferor get back the income or asset, or reassume power over it; income from it is taxed in the transferor's hands under sections 97 and 98 of the ITA.
- Pass-through statusTax treatment under which a fund's income is not taxed in the fund but directly in its investors' hands — and which the Income Tax Act does not give a Category III AIF.
- Alternate Minimum TaxA floor tax on non-corporate assessees — 18.5% of adjusted total income, 15% for a co-operative society — payable when it exceeds their normal tax, with the excess carried forward as credit for 15 years.
- Effective rate of taxThe actual tax paid as a percentage of income — not a defined term in the Income Tax Act, but total tax including surcharge and cess, divided by total income.