What Legal Agreements Do Investors Expect When Investing in Startups?

You’ve spent months finessing your business idea, building your MVP, and maybe even landing your first customers-now, you’re ready to raise your first round of investment and bring in those all-important investors who invest in startups. Before you pop the champagne, there’s a crucial step that can make or break your fundraising journey: having the right legal agreements in place.

Whether you’re chasing angel capital, a seed round, or even Series A funding, the legal documents you prepare now will shape your startup’s future. Investors aren’t just looking for a great pitch-they want reassurance that their money is protected, their rights are clear, and compliance risks are under control. So, what legal agreements do investors expect, and how can you make sure your startup passes due diligence with flying colours?

Don’t worry if you feel a bit lost-we’re here to break it down in simple terms so you’ll be ready to welcome those investors with confidence. Let’s dive in.

Why Do Investors Who Invest in Startups Want Legal Agreements?

If you’re new to the world of equity investment, it might seem like there’s a lot of paperwork. But there’s a reason: investors who invest in startups take substantial risks. They want clear documentation that spells out:

• What they’re getting in exchange for their money (shares, options, or something else)
• How their investment is protected
• How key decisions are made and what rights they’ll have
• What happens if things go wrong (like a founder leaves or the company is sold)

Without robust legal agreements, misunderstandings can arise, disputes may derail your business, and it’s much harder to attract serious investors. Getting your legal foundations right from day one is not only a sign of professionalism but can also speed up fundraising and build trust.

What Are the Main Legal Agreements Investors Expect?

When you’re preparing your startup for investment, there are several key agreements and documents investors will almost always expect to see. Let’s walk through the essentials:

1. Shareholders’ Agreement

This is often at the top of every investor’s checklist. A Shareholders’ Agreement sets out the rights and responsibilities of all company shareholders-including founders, early employees, and any new investors. It covers crucial topics like:

• How decisions are made (voting rights, reserved matters)
• What happens if a shareholder wants to sell their shares (exit clauses)
• Drag-along and tag-along rights-ensuring everyone is protected in a company sale
• Pre-emption rights on new share issues
• Dispute resolution procedures

Properly drafting your shareholders’ agreement is absolutely crucial, and it’s worth reading our in-depth guide: Shareholders’ Agreements: Preventing Disputes & Safeguarding the Business.

2. Share Subscription Agreement

This is the main contract that sets out the terms on which the investor is buying shares. It covers:

• The number, class, and price of shares being issued
• Timing of payment and share allotment
• The representations and warranties each party gives (i.e., guarantees by founders and investors)
• Conditions that must be satisfied before the investment closes (“completion” conditions)

Find out more in our guide to what goes into a Share Subscription Agreement, including why each clause is there and what to watch out for.

3. Articles of Association

These are your company’s constitutional documents, registered at Companies House. Any investment round usually involves updating or “amending” the articles to reflect agreements with new investors-especially around shares, voting, and exit arrangements.

Investors expect to see a set of articles that matches the commercial agreements (share classes, pre-emption rights, etc.) made in the shareholders’ agreement and share subscription documentation. Learn more on amending and understanding your Articles of Association.

4. Cap Table and Investment Terms

While not a contract, every serious investor will want to see a clear, up-to-date capitalisation table (or “cap table”). This shows who owns what percentage of your company-before and after their investment. It should match the share allocations in your subscription and shareholders’ agreements.

You’ll also need to provide a detailed term sheet that summarises the main commercial terms of the deal. This non-binding document is often negotiated first, but the investment is only legally binding once you sign the formal agreements above.

5. Option Schemes and Employee Equity

Many startups offer employees share options or equity incentives. Investors will want to see how these are structured (Enterprise Management Incentives, or EMI Schemes, are popular). They’ll also want to check that the option pool is set up correctly and what dilution impact it will have post-investment.

For more on this, check out our articles on Share Option Schemes and EMI Share Schemes.

6. IP Assignment and Protection

Investors want to make sure that the startup actually owns (and can retain ownership of) the core intellectual property (IP) of the business. That means founders, employees, and contractors should all have signed agreements assigning any relevant IP (like code, designs, or inventions) to the company.

This can be a major sticking point-if investors think someone else can walk away with your IP, it’s a huge red flag.

Read our practical guide to protecting your IP and why assignment agreements matter.

7. Warranties and Due Diligence Disclosures

When closing an investment, investors will expect the company and its founders to give warranties-statements that confirm things like the company’s legal standing, accounts, ownership of assets, and existing debts or claims.

If any of these warranties aren’t accurate, you’ll need to disclose this in a disclosure letter. Getting this part right is key for keeping trust and avoiding disputes after the investment closes.

Are There Other Legal Documents or Steps to Prepare?

Absolutely. While the above are the essentials, savvy investors who invest in startups may look for additional documents:

• Non-Disclosure Agreements (NDAs): Protects confidential business info in negotiations pre-investment.
• Service Agreements and Contractor Contracts: To ensure anyone who’s created IP for the business has assigned it to the company.
• Data Protection and Privacy Policies: Especially important for tech/web startups dealing with customer data (check out our GDPR compliance guide).
• Employment Contracts: Properly drafted and compliant with UK employment law.

At the very minimum, investors expect to see that you haven’t relied entirely on DIY templates-legal documents need to be tailored to your specific deal and business model.

Are There Any Legal Risks If You Don’t Get These Agreements Right?

In short: yes, and they can be costly. Failing to have proper agreements can result in:

• Disputes between founders and investors
• Investors pulling out at the last minute during due diligence
• Difficulty raising future funding rounds (later investors don’t want to untangle messy structures)
• Shareholder deadlocks blocking key decisions
• Unsecure IP, meaning someone else could claim ownership of your technology or brand
• Potential legal action if investors feel misled about key facts

The best way to prevent these headaches is simple: have clear, robust, and professionally drafted legal agreements from the outset-and keep them updated as your business grows.

How Do I Prepare for Investment Due Diligence?

Due diligence is when investors who invest in startups check that everything is as claimed-your accounts, ownership records, contracts, IP, and compliance. To make this process as smooth as possible, make sure you:

1. Keep a clean, accurate cap table showing all shareholdings and previous investment rounds.
2. Update all Companies House filings, including company registration details and share issues.
3. Store key legal documents in one secure place (digitally is fine) and know where to find them quickly.
4. Document any previous founder departures, disputes, or loans-transparency always helps.
5. Review all commercial contracts to check you have the right IP ownership, assignation, and confidentiality terms in place.

Check out our own due diligence checklist to help you get your records ready.

Can I Use Free Templates or DIY My Agreements?

While it’s tempting to cut corners, investors can usually spot a DIY approach a mile off. Not only will it slow down the investment process, but poorly drafted agreements can leave you-and your startup-vulnerable to costly legal issues down the line.

Good legal agreements don’t just tick a box. They shape your relationships, clarify rights, and protect your business as you grow. Investing in professional support pays off by unlocking funding, preventing disputes, and making your startup attractive to future investors.

If you’re unsure where to start, Sprintlaw can help-our founder and shareholders’ agreement services are designed for UK startups and scaleups.

What About SEIS/EIS Compliance and Investor Tax Reliefs?

Many UK investors-especially angel investors-will want to take advantage of government tax incentive schemes designed to support high-growth startups:

• SEIS (Seed Enterprise Investment Scheme)
• EIS (Enterprise Investment Scheme)

Each scheme has stringent rules about what companies qualify and how shares must be issued. You’ll need to apply for “advance assurance” from HMRC before the investment, and make sure all your company documents are compliant with SEIS/EIS rules. Investors will ask about this early-be prepared to show you’re on top of it. You can learn more in our explainer: SEIS & EIS Changes.

Do Convertible Loan Notes or SAFE Agreements Count?

Some early-stage investors or accelerators invest via convertible loan notes or SAFE (Simple Agreement for Future Equity) agreements, rather than directly buying shares upfront. These are more complex documents that let investors convert their investment into shares in a future round-usually at a discount.

If you’re going down this route, you’ll need a well-drafted convertible note or SAFE agreement that spells out the conversion terms, valuation caps, discounts, triggers, and protections for both sides. Check our guide to SAFE Notes for more information.

What Should I Do Next to Attract Investors Who Invest in Startups?

If you’re gearing up to secure your first (or next) investment, here’s a quick checklist to make sure you’ve covered the legal basics:

• Update your cap table and know your share allocations
• Review and amend your Articles of Association as needed
• Prepare a clear, tailored Share Subscription Agreement and Shareholders’ Agreement
• Get your IP assignment and employment agreements in order
• Ensure your startup’s SEIS/EIS status (if you’re seeking this kind of investor support)
• Store your agreements in a place you can easily share with prospective investors
• Get professional legal advice to make sure every agreement is watertight and future-proof

Addressing these legal must-haves won’t just make life easier for you and your investors-it’ll set your startup up for long-term, compliant growth.

Key Takeaways

• Investors who invest in startups expect comprehensive, professionally drafted legal agreements to protect their investment.
• Essential agreements include a Shareholders’ Agreement, Share Subscription Agreement, updated Articles of Association, and clear cap table.
• Other important supporting documents include IP assignments, option schemes, NDAs, and data protection policies.
• Proper legal preparation speeds up due diligence, builds trust, and prevents costly disputes or delays.
• Templates and DIY contracts usually aren’t enough to satisfy serious investors-get tailored advice for your situation.
• Preparing for SEIS/EIS and understanding convertible notes/SAFE agreements can give your startup an edge in attracting high-quality investors.
• Setting up your legal foundations early will help your business grow confidently and unlock future opportunities.

If you’d like help getting your startup investment-ready-or you’re unsure what documents you need-get in touch with our friendly team for a free, no-obligations chat. You can reach us at 08081347754 or team@sprintlaw.co.uk-we’re here to empower your business right from the start!