Category 1 AIF (Cat I) Explained: Venture Capital, SME and Infrastructure Funds
By Trilithon Research Desk · Last updated · 7 min read
Short answer: A Category 1 AIF (Cat I AIF) pools investor money into startups, early-stage companies, SMEs, infrastructure and social ventures, the sectors SEBI wants to encourage. It takes five forms: venture capital, angel, SME, social venture and infrastructure funds. It is close-ended, locked for at least three years, barred from borrowing beyond short-term needs, and generally taxed in the investor’s hands. The minimum commitment is ₹1 crore.
5 sub-types. VC, angel, SME, social, infra. 3+ years. Minimum fund term. Unlisted. Mostly private holdings. ₹1 crore. Standard minimum.
Note: Trilithon does not manage Category I funds. We run a Category III AIF, and this page is a neutral guide for readers weighing their options.
What a Category 1 AIF actually is
When SEBI wrote the AIF rules in 2012, it set aside one category for funds that put money into areas with a broad economic payoff: young companies, small businesses, infrastructure and social enterprises. That is Category I. In practice, it is the venture-capital corner of the AIF world, plus funds that finance roads, power and similar projects.
Because these investments take years to mature, Category I funds are close-ended and may not borrow beyond short-term operating needs. The wider framework is explained on the AIF categories page. This guide stays with Category I.
The five kinds of Category 1 AIF
| Sub-type | What it buys | How it earns |
|---|---|---|
| Venture capital fund | Unlisted shares of startups and early-stage companies | Selling stakes after the company grows |
| Angel fund | Very early stakes in startups, pooled from angel investors (a sub-category of venture capital funds) | Exits by sale or later funding rounds |
| SME fund | Small and medium enterprises, including firms on SME exchanges | Growth in value and eventual exits |
| Social venture fund | Enterprises with a stated social objective | Returns from the enterprise, often alongside social goals |
| Infrastructure fund | Companies and projects that build or run infrastructure | Project income and long-term value |
How a Category 1 fund lives, from first close to wind-up
- Fundraise: investors sign commitments, and many funds draw the money in stages rather than all at once.
- Investing: the manager builds a portfolio over the early years of the term.
- Holding and follow-ons: winning companies often need more capital, so managers usually keep some reserve for them.
- Exits: stakes are sold through a sale of the company, a listing or a secondary sale, and cash flows back to investors.
- Wind-up: the scheme must be liquidated at the end of its tenure unless unit-holders approve an extension.
The early years often show a dip in value as fees are charged before any gains are booked. This is the “J-curve”, and it is normal for the category, not a warning sign by itself.
Rules that shape every Category 1 AIF
- Tenure: at least three years, with an extension of up to two more years if unit-holders approve. Without approval, the fund is expected to liquidate within a year after the term ends.
- Borrowing: only for short-term operational needs.
- Funds investing in funds: a Category I AIF may hold units of another Category I AIF in the same sub-category, but not units of a fund of funds.
- Investor cap: a scheme, other than an angel fund, can have at most 1,000 investors.
- Minimum commitment: ₹1 crore per investor under SEBI rules; angel funds follow their own investor requirements.
What to check before committing to a Category 1 fund
- Manager track record: past exits and realised returns matter more than paper valuations.
- Sector focus: a clear thesis in a sector the team knows well.
- Follow-on reserve: how much is held back for winners.
- Fees and carry: management fee, performance share and when each is charged.
- Valuation policy: who values unlisted holdings and how often.
- Reporting: frequency and detail of investor updates.
Tax treatment and who can invest
Category I AIFs generally have pass-through status, so income is taxed in the investor’s hands rather than in the fund. See our note on AIF taxation across categories. Resident HNIs, NRIs, corporates, trusts, family offices and institutions can invest if they meet the fund’s eligibility terms. The route is covered in how to invest.
Category 1 or Category 3: a plain comparison
A Category I fund asks for patience. Your money is tied up for years, returns arrive at exits, and the value you see in between is an estimate. A Category 3 AIF works the other way round: it holds listed securities with market prices, may use derivatives and leverage within SEBI limits, can be open-ended, and is taxed at the fund level instead of passing income through. Neither is a substitute for the other, because they answer different questions about horizon, liquidity and risk. The side-by-side table lives on the AIF categories page.
What can go wrong with a Category 1 AIF
- Capital is stuck: there is no market to sell your units, so you wait for the fund’s exits.
- Startups fail: a few winners usually carry the portfolio, and some holdings can go to zero.
- Estimated values: unlisted holdings are valued by models, so the NAV can lag reality.
- Exit timing: listings and sales depend on market conditions that no manager controls.
Weighing Category I against listed-market options?
If a long lock-in is a concern, talk to us about how a Category III AIF differs. No obligation. Talk to us. Compare all categories.
Related reading
AIF categories explained · Category II AIF · Category III AIF · AIF vs PMS
Disclaimer: Investments in securities markets are subject to market risks, including the possible loss of the entire principal. Past performance is not indicative of future results. This page is for information only and is not investment, tax or legal advice, or an offer to sell or solicit securities. Trilithon does not offer Category I AIFs. Category III AIF: Trilithon (SEBI Reg. No. IN/AIF3/25-26/1808), registered under SEBI (AIF) Regulations, 2012. Please read the PPM and all scheme documents before investing.
Category 1 AIF questions answered
What is a Category 1 AIF?
A Category 1 AIF is a SEBI-registered pooled fund that invests in startups, early-stage ventures, SMEs, infrastructure or social ventures. It is close-ended and cannot borrow beyond short-term operational needs.
Are angel funds Category 1 AIFs?
Yes. Angel funds are a sub-category of venture capital funds, which sit within Category I.
How long is money locked in a Category 1 AIF?
A Category I scheme has a minimum tenure of three years, which can be extended by up to two more years with unit-holder approval. Many funds run longer in practice because exits take time.
Can a Category 1 AIF invest in another AIF?
It may invest in units of another Category I AIF of the same sub-category, but not in a fund of funds.
What is the difference between Category 1 and Category 3 AIF?
Category I backs unlisted startups, SMEs and infrastructure over a long, locked term and passes income through to investors. Category III runs listed-market strategies, may use derivatives and leverage within SEBI limits, can be open-ended, and is taxed at the fund level.
Who can invest in a Category 1 AIF?
Resident HNIs, NRIs, corporates, trusts, family offices and institutions that meet the fund’s eligibility terms and the minimum commitment.
What is the minimum investment in a Category 1 AIF?
₹1 crore per investor, with angel funds following their own investor requirements.
Are Category 1 AIF returns guaranteed?
No. Startup and infrastructure investments can lose value, and the whole principal can be lost. SEBI registration does not guarantee returns.