How to Invest in Startups: Step-by-Step Guide with Examples

1. 1.0
   Set an amount you could lose in fullUse money you will not need for many years. Startup stakes can take a decade to pay out, or never pay out at all.
2. 2.0
   Check what you are allowed to buyMost private rounds take only accredited investors. If you do not qualify, crowdfunding offerings are open to you, within yearly limits.
3. 3.0
   Choose a routeInvest directly as an angel, join an angel group or syndicate, use a crowdfunding portal, or commit to a fund. Each route sets the minimum, the fees and how much you decide yourself.
4. 4.0
   Screen the companyLook at the team, the problem, early customers and who else is investing. This review is called due diligence. A lead investor who has done it is a useful signal, and you still need to read the terms.
5. 5.0
   Read the termsFind out what you are buying: shares, a SAFE or a convertible note. Check the valuation or valuation cap, any liquidation preference and whether you get pro rata rights.
6. 6.0
   Sign and payYou sign a subscription agreement or SAFE and wire the money. In an advertised round, the company must verify that you are accredited, often with tax forms or a letter from a lawyer or broker.
7. 7.0
   Keep the recordsSave the signed documents, the date and the amount. They set your cost and your holding period for tax, including any QSBS claim years later.
8. 8.0
   Plan for a long holdExpect new rounds to reduce your percentage. Decide in advance whether you will invest again if you have the right to.

In the US, a startup cannot sell shares to the public without registering with the SEC. So it uses exemptions, and each one sets who may buy. Three matter for individual investors.

Regulation D

Most startup rounds. Rule 506(b) bars advertising. Rule 506(c) allows it, but every buyer must be accredited and verified (Rule 506). The company files Form D within 15 days of the first sale, so many rounds show up in the SEC’s public database (Rule 503).

Regulation Crowdfunding

Open to anyone, through a registered portal. A company can raise up to $5M a year this way. If your income or net worth is under $124,000, you can invest the greater of $2,500 or 5% of the larger figure each year. If both are at least $124,000, the limit is 10%, capped at $124,000 (17 CFR 227.100).

Regulation A

A lighter public offering, open to non-accredited investors within limits. See Reg A+.

You qualify as accredited with a net worth above $1 million without your home, or income above $200,000 ($300,000 with a spouse) in each of the last two years. Some professional licenses designated by the SEC also count (Rule 501).

Selling is restricted either way. Crowdfunding shares cannot be transferred for one year, except to the company, an accredited investor, a family member or in a registered offering (17 CFR 227.501). Shares from a Regulation D round are restricted securities. Under Rule 144, you must hold them at least one year while the company is private (17 CFR 230.144). In practice, there is rarely a buyer before an exit.

Directly, as an angel

You pick the company and write the check. You get the most control and carry the most concentration. See angel investor vs venture capital.

Angel group or syndicate

A lead investor finds and checks the deal. Members invest together, often through a single-deal vehicle, an SPV. The lead may charge a share of profits.

Crowdfunding portal

Small amounts, open to non-accredited investors, with yearly limits. Information can be thinner than in a VC-led round.

Venture fund

You commit money as a limited partner, and the managers pick the companies. You pay a yearly fee and carried interest, a share of the profits. See early-stage venture capital.

Late-stage SPVs

Some platforms pool investors into one late-stage private company. Axevil uses a separate Delaware SPV for each deal, managed by Axevil Capital, LLC. Minimums and fees are set per deal and written in that SPV’s documents. See pre-IPO shares.

The stage changes the bet. At pre-seed and seed, you buy early and cheap, with the most uncertainty. Later rounds cost more per share and come with more evidence. The step between them is covered in seed funding vs Series A.

The formula has two parts. Post-money valuation = pre-money valuation + new money raised. Your stake = your investment ÷ post-money valuation. The example uses the 2026 US medians for a seed round and a Series A. The investor is illustrative.

Your percentage falls from 0.047% to 0.036% because the Series A adds new shares. That is dilution. The paper value rises to about $28,300 because the price per share went up. It is not cash. Nobody has to buy your stake at that price, and later rounds, preferences or a failure can change the outcome.

Crowdfunding Limit: A Second Example

Say you are not accredited. Your income is $90,000 and your net worth is $150,000. One of the two is under $124,000, so your limit is the greater of $2,500 or 5% of $150,000. That is $7,500 across all crowdfunding offerings in 12 months.

• An amount set aside that you could lose in full
• Your status confirmed: accredited, or your crowdfunding limit worked out
• What you are buying named in writing: shares, SAFE or note
• Valuation or cap, discount and liquidation preference read
• Fees and profit share known, if you invest through an SPV or fund
• Other investors in the round, and who leads it
• A copy of every signed document and the payment date saved
• A plan for follow-on rounds and for holding many years

• Putting it all in one companyA single failure can wipe out the whole amount. Many angels spread money over several companies.
• Treating a SAFE as sharesIt is a contract that converts later. Until then you have no vote and no fixed stake.
• Reading a markup as a gainA higher price in the next round is a paper value. You cannot sell at it.
• Ignoring preferencesLater investors may be paid back first in a sale. Common holders get what is left.
• Losing the paperworkQSBS and loss deductions need dates and proof of original issue. Keep everything.
• Going over the crowdfunding limitThe limit counts all offerings over 12 months, across every portal.

You may rely on QSBS

The gain exclusion needs stock bought at original issue from a C corporation with gross assets of $75M or less. For stock issued after July 4, 2025, it grows from 50% after three years to 100% after five (26 U.S.C. 1202). A tax adviser can check the facts and the records.

A company fails

Losses on qualifying small business stock can be ordinary, up to $50,000 a year or $100,000 on a joint return (26 U.S.C. 1244). An adviser can check whether your shares qualify.

You invest through an SPV or fund

You will usually get a K-1, a partnership tax form, which can arrive late. Plan your filing around it.

The terms are unusual

Side letters, custom preferences or personal guarantees deserve a lawyer’s reading before you sign.

You live outside the US

Your own country’s rules on investor status and tax also apply. Check both.

Accredited investor

An investor who passes the SEC’s income, wealth or credential tests in Rule 501.

Regulation D

The SEC exemptions most startups use to sell shares privately.

Regulation Crowdfunding

An SEC exemption that lets startups raise up to $5M a year from the public through registered portals.

SAFE

Simple agreement for future equity: cash now for shares in a later priced round.

Pre-money valuation

The value of a company before the new money in a round is added.

Post-money valuation

Pre-money valuation plus the new money raised in the round.

Due diligence

Checking a company’s team, business, finances and terms before investing.

SPV

Special purpose vehicle: an entity that pools investors’ money into one deal.

Dilution

The drop in your percentage when a company issues new shares.

QSBS

Qualified small business stock: shares that can earn a federal tax exclusion on the gain.

Rules and figures were last checked on November 9, 2026. All rules described are US federal rules. Market medians are PitchBook-NVCA data as of September 30, 2026. The worked examples are illustrative arithmetic.