Individuals can invest in startups. An equity crowdfunding platform like WiSEED accepts tickets from €100, and France's IR-PME tax reduction refunds 18% of the amounts you put into the capital of a young SME, up to €50,000 of contributions per year for a single person (service-public.gouv.fr). In return, you accept the risk of losing everything and having your capital locked up for several years.
This guide covers the four ways to invest in startups, the mistakes that cost beginners the most, the criteria for evaluating a company, how to prepare your exit, and the tax rules that apply in 2026.
What a startup is and why you might invest in one
A simple definition of a startup
Three traits set a startup apart from a small, recently founded business: it offers an innovative solution to an existing problem or a new need, it aims for rapid growth, and its business model lets it multiply its customers without multiplying its costs at the same rate.
A traditional SME looks for steady growth in its market. A startup tries to change the rules of its market with a product or service nobody offers yet, which explains both its return potential and its failure rate.
Why invest in a startup
There are three reasons to invest in startups. The first is return: a stake taken early in a company that succeeds can be sold at a multiple of its entry price, something no listed investment offers. The second is diversification: private companies don't follow the same cycles as the stock market. The third is purpose: you fund a team and a project you chose yourself, and you follow their progress up close.
The trade-off is twofold. A startup takes several years to generate a return, and the IR-PME scheme actually requires you to hold your shares for five years. Liquidity is also low: you sell your shares when an exit opportunity comes along, and that timing is rarely yours to choose.
Three common mistakes in startup investing
Investing without understanding the business model
The first mistake is investing before you understand how the company makes money. A startup's business model hasn't been proven yet: the team adjusts it based on customer feedback, and you need to be able to follow that reasoning.
A founder who claims to have no competitors is sending you a signal. There is always competition, direct or indirect, including whatever workaround customers are cobbling together today. If nobody else is tackling the problem, ask whether the market really exists.
The financial forecast also tells you something about the founder. A plan disconnected from the market's actual volumes shows a founder who hasn't tested their assumptions, and experienced investors end the conversation right there.
Underestimating dilution risk
Dilution affects every shareholder at each funding round, and first-time investors often discover it after the fact. When the company issues new shares, your percentage of the capital goes down, even if the company's total value goes up.
The classic image is a pie: each new investor means cutting the pie into more slices, and every existing slice gets smaller. The value of your slice after the round tells you more than its percentage.
Convertible instruments such as the BSA Air or the SAFE (Simple Agreement for Future Equity) push dilution back to the next qualified round. At conversion, a valuation cap or a discount that favors new investors can dilute existing shareholders more than expected.
You can limit these effects with an anti-dilution clause in the shareholders' agreement, or with a pre-emption right that lets you buy new shares before they go to outside parties.
Overlooking how long your capital stays locked up
The third mistake concerns time. Unlike listed shares, startup shares can't be sold on an open market. You wait for an exit event, and that wait lasts several years even when the company does well.
Startups rarely pay dividends: they reinvest any profits to accelerate growth. If you're looking for regular income, venture capital won't provide it.
Only invest money you can afford to lose and won't need in the short term.
Four ways to invest in a startup
There are four routes, from the most hands-on to the most delegated: business angel investing, investment clubs, crowdfunding platforms and venture capital funds.
Direct investment: the business angel
A business angel invests their own money directly into a startup's capital, usually in its early days. They also bring experience, a network and time to the founders.
You keep full control over your decisions and have direct contact with the team. In exchange, you need to know how to analyze a deal and be available to support the company.
Business angels qualify for the IR-PME tax reduction: 18% of contributions to the capital of an SME that has been operating for less than ten years since registration, provided you hold the shares for five years (service-public.gouv.fr).
This is the riskiest of the four routes. With only a handful of positions, you aren't diversified, and a single successful exit has to make up for the failures.
Investment clubs: pooling resources and support
An investment club brings together several people who pool their resources to invest as a group. You share both risk and skills: one member reads the financials, another knows the sector, a third has already negotiated a shareholders' agreement.
The ticket per member is lower than in direct investment, so you can get your first experience without committing a large sum. Clubs often provide educational support, and investment decisions are made collectively, which puts your analysis to the test against other members' views.
Crowdfunding platforms: accessibility and variety
Equity crowdfunding is the most accessible route. Platforms such as WiSEED, Anaxago and Tudigo pre-screen projects and open them to individual investors; WiSEED advertises a minimum ticket of €100.
At that entry level, you can build a portfolio of several startups even with limited capital. Support is lighter than in a club, though: you decide on your own, based on the deal information the platform publishes.
Specialized VC funds: delegated management and diversification
If you'd rather delegate selection and follow-up, venture capital funds invest on your behalf in a portfolio of startups. They specialize by sector (biotech, fintech, greentech) or by stage (seed, Series A).
For individuals the minimum ticket is high, except through certain funds available via wealth management platforms. You get diversification and professional management, in exchange for annual management fees that weigh on your final return.
Four steps to becoming a startup investor
Define your investment goals
Before investing your first euro, set three parameters. The amount: startup investing exposes you to total loss, so only commit money you can do without. The time horizon: this capital will be tied up for several years, at least five if you're counting on IR-PME. Your expected return and risk tolerance: together they determine how many positions you need and which route suits you.
Find and analyze opportunities
Once your goals are set, you look for deals. There are four main sources:
- Specialized crowdfunding platforms
- Incubators and accelerators
- Business angel networks
- Pitch events and industry trade shows
For each deal, you assess the target market and how the startup is positioned against its competitors. The central question is need: does the company solve a problem customers already pay to solve?
Also look at scalability, meaning the company's ability to grow revenue without growing fixed costs at the same rate.
Carry out basic due diligence
Due diligence means checking the key facts before you invest. Individuals can do it on a smaller scale, and it covers four areas.
On the financial side, you read the financial statements and stress-test the business plan. On the legal side, you check the articles of association, intellectual property and existing contracts. On the operational side, you assess the founding team, the technology and the product. On the commercial side, you evaluate the market, the competition and existing customers.
For a tech-heavy startup, technical due diligence looks at the maturity and scalability of the software, the skills of the tech team, security, and whether planned investments are realistic.
Sign and monitor your investment
If due diligence checks out, you formalize the investment. You negotiate the terms, starting with the valuation and the rights attached to your stake.
The term sheet sets out these conditions before the final documents: valuation, pre-emption rights, liquidity clauses.
Monitoring begins after signing. You take part in governance bodies if your stake gives you access, you track the company's key metrics, and you contribute your expertise and network when the founders need them.
Four criteria for evaluating a startup
Quality of the founding team
The team is the first thing early-stage investors look at, because at this stage the product and the market will still change. You examine four points:
- The founders' experience and credibility in their field
- How well the team's skills complement each other
- The ability to define a strategy and execute it
- Team cohesion and a shared vision
A complementary, tight-knit team gets through the obstacles a startup faces between founding and exit.
Market size and maturity
Investors look for large, growing markets. You check that the startup addresses a real problem, with enough potential customers to support its growth plan.
The analysis covers:
- The actual size of the market and its growth potential
- Customer demand and industry trends
- Barriers to entry and applicable regulation
The way founders talk about their market tells you how well they can position their offer within it.
Growth potential and scalability
Scalability is a company's ability to grow revenue without its costs rising at the same rate. A scalable startup multiplies its revenue while keeping unit costs flat or lower, absorbs rapid growth, and expands its model without major additional investment.
Investors look for this trait because it determines the multiple achievable at exit.
Competitive positioning
Competitive analysis shows how the startup stands out in its market. A clear, defensible position improves its odds of holding its ground against better-funded competitors.
You look at:
- A precise identification of direct and indirect competitors
- The value proposition and competitive advantages
- Technological innovation and barriers to entry (patents, intellectual property)
- The customer experience or business model that sets the startup apart from existing offers
Plan your exit strategy from day one
The return on a startup investment is realized at exit. Thinking about the exit before you even invest seems counterintuitive, yet professional investors do exactly that, because exit terms are negotiated in the initial shareholders' agreement.
Understand exit mechanisms: IPO, secondary sale, acquisition
There are three ways to cash in your stake. An initial public offering (IPO) applies to a small minority of startups and requires a size few ever reach. Acquisition by an established company is the most common exit. Selling your shares to other investors, on the secondary market or during a funding round, provides partial liquidity before either of the first two.
Each route takes several years, and the timing depends on the company's growth and on buyer appetite.
Anticipate the contractual clauses
Exit terms are negotiated at entry, through several clauses in the shareholders' agreement.
The pre-emption right gives existing shareholders priority to buy shares put up for sale, which protects you from an investor you didn't choose coming on board.
The tag-along clause lets you sell your shares on the same terms as the founders if they sell theirs. The drag-along clause requires you to sell if the majority accepts an offer.
The liquidation preference sets the order in which shareholders are paid out in a sale or liquidation. Depending on its rank and multiple, it can sharply reduce what you receive.
Track the startup's progress to adjust your strategy
A successful exit comes from active monitoring. At regular intervals, you assess progress toward the operational and financial milestones set at the outset, market and competitive shifts that could open an exit window, and warning signs such as a co-founder leaving or a change of product or target market.
Keep talking with the founders about their own time horizons too: their exit plans shape your options.
Tax treatment of startup investments and exits
Tax reductions by type of investment
The IR-PME tax reduction (known as "Madelin") is the main scheme. It is worth 18% of contributions to the capital of an unlisted SME, up to €50,000 of contributions per year for a single person and €100,000 for a couple. The rate rises to 30% for a young innovative company (JEI), with the ceiling raised to €75,000 and €150,000 (service-public.gouv.fr).
The PEA-PME is another vehicle: after five years of holding, you pay no income tax on gains, only social contributions, and the contribution ceiling is €225,000 (service-public.gouv.fr).
Holding period and conditions
To keep the tax benefit, you must hold the shares for five years, for both IR-PME and PEA-PME. Selling before then triggers a clawback of the reduction, except in cases provided for by law.
The company must meet the SME definition: fewer than 250 employees, and annual revenue of no more than €50 million or a balance sheet total of no more than €43 million (INSEE). For IR-PME, it must also be unlisted on a regulated market and have been created less than ten years ago.
Exits: secondary sale, IPO, dividends, acquisition
Since January 1, 2026, capital gains on share sales and dividends fall under the flat tax at 31.4%: 12.8% income tax plus 18.6% social contributions (service-public.gouv.fr). You can opt for the progressive income tax scale instead if your marginal rate is lower.
These rules apply to a secondary sale, a sale during a trade acquisition and a sale after an IPO. Shares held in a PEA-PME are exempt from income tax after five years and are subject to social contributions only.
To invest in startups alongside us, find all the details here.
Frequently asked questions
What is the minimum amount to invest in a startup? On a crowdfunding platform, WiSEED accepts tickets from €100. In direct investment as a business angel, the amount is negotiated with the founders and depends on the round's valuation.
How long do I have to hold my shares for IR-PME? Five years from subscription, according to service-public.gouv.fr. Selling before then triggers a clawback of the tax reduction, except in cases provided for by law.
Does a BSA Air qualify for IR-PME? Not at subscription, because the instrument isn't yet a share of capital. The reduction kicks in at conversion, if the company meets the SME conditions at that point. Our BSA Air guide explains how this works.
What's the difference between a business angel and an investment club? A business angel invests and decides alone, with a larger ticket and an active role alongside the founders. A club brings together several investors who share the analysis, the decision and the risk, with a smaller ticket per member.
What happens if the startup goes bankrupt? You lose your investment, because liquidation pays creditors before shareholders and there is rarely anything left for them. Hence the rule experienced investors follow: only commit money you can do without, spread across several companies so that one successful exit makes up for the losses.
The information in this article is provided for informational purposes only and does not constitute legal, financial or tax advice. Legislation changes every year: for your specific situation, consult a tax lawyer or a chartered accountant.
