Legal Advice for Startups: A Founder’s Guide

If you are setting up a business in the UK, the decisions you make in the first few months, how you structure the company, what you agree with your co-founders, and how you protect what you have built, will affect that business for years afterwards. Getting the right legal advice for startups early is not a compliance box to tick. It is what stops a disagreement between two co-founders becoming a dispute that ends the company, and what makes the difference between a smooth investment round and one that stalls in due diligence.

This guide sets out the areas where startup legal advice matters most in the first two years of a UK business: choosing a company structure, founder and shareholder agreements, protecting your intellectual property, employment contracts for your first hires, raising investment through SEIS, EIS and EMI share options, GDPR and data protection, and the standard commercial contracts every trading business needs. As startup solicitors, we act for founders across technology, professional services and consumer businesses, and our startup investment solicitors advise on funding rounds from the first SEIS raise onwards. The same handful of legal gaps come up again and again, usually because nobody flagged them until they had already caused a problem.

Choosing the right company structure

Most UK startups end up as a private limited company, and for good reason: it separates your personal finances from the business, it is the structure investors expect, and it gives you flexibility to issue shares as you grow. It is not automatically the right answer for everyone, so it is worth understanding the alternatives before you file anything with Companies House.

• Sole trader: simplest to set up and run, but you are personally liable for the business’s debts and it is rarely acceptable to outside investors.
• Ordinary partnership: workable for two or more founders sharing a business informally, but each partner carries unlimited personal liability for the others’ actions in the business.
• Limited liability partnership (LLP): gives partners limited liability while keeping partnership-style flexibility, commonly used by professional practices rather than product startups.
• Private limited company (Ltd): a separate legal entity from its founders, limited liability for shareholders, and the structure almost all UK investors will require before they put money in.

The right choice depends on your liability exposure, how you plan to fund growth, and whether outside investment is realistically on the horizon. Getting this wrong is rarely fatal on its own, but converting a partnership or sole trader business into a limited company later, once contracts, assets and goodwill already sit with the old structure, adds cost and complexity you can avoid by making the right call at the outset. Since 18 November 2025, anyone becoming a director of a new or existing company has to verify their identity with Companies House, so build that into your incorporation timetable.

Founder and shareholder agreements: the dispute you can prevent

Of every gap we see in early-stage businesses, the missing or informal founders’ agreement causes the most damage. Two or three founders start a business on trust, without ever writing down what happens if one of them leaves, stops contributing, or wants to sell their shares. That is manageable while everyone is in the room every day. It becomes a serious problem the moment one founder’s circumstances change and there is nothing in writing to fall back on.

A founders’ agreement (sitting alongside your company’s articles of association and, once you take on outside investors, a shareholders’ agreement) should cover:

• Equity split and how it was decided
• Vesting: shares earned over time rather than granted in full on day one, so a founder who leaves after six months does not keep a full stake
• Roles, decision-making authority and what needs unanimous agreement versus a simple majority
• What happens on a founder’s departure, including good leaver and bad leaver provisions and how their shares are valued and transferred
• Deadlock provisions for when founders disagree and cannot reach a decision
• Restrictions on founders competing with the business or poaching staff and clients if they leave

A two-founder SaaS startup with no written agreement and an even 50/50 split is a genuinely common and genuinely risky position: if the founders fall out, neither can outvote the other and the company can be paralysed at exactly the point it needs to make decisions quickly. Building in vesting and a mechanism for resolving deadlock from day one avoids this. It is far cheaper to agree these terms while the relationship is good than to negotiate them once it has broken down.

Protecting your intellectual property

For most startups, the underlying idea, brand, code or content is the most valuable asset the business owns, and it is also the asset most commonly left unprotected in the early stages.

• Trade marks: register your business name and logo with the UK Intellectual Property Office once you have settled on them. An unregistered name can be used by a competitor, and if someone else registers it first, you may have to rebrand.
• Copyright: arises automatically in original code, content and design, but ownership needs to sit with the company, not with an individual founder, freelancer or agency who built it.
• IP assignment: every founder, employee, contractor and freelancer who creates anything for the business, code, designs, written content, should sign an agreement assigning that IP to the company. Without this, the company may not actually own its own product.
• Patents: relevant if your product involves a genuine technical invention. Patent applications are time-sensitive and public disclosure before filing can prevent you from patenting at all, so take advice before you demo a patentable invention publicly.
• Confidentiality: non-disclosure agreements protect early conversations with investors, contractors and potential partners before you have formal contracts in place.

The IP assignment point is worth repeating on its own, because it is the one we most often see missed. A startup that outsourced its original build to a freelance developer, with no written agreement transferring the IP, does not automatically own the code that developer wrote. That gap can surface at the worst possible time: during investor due diligence, when the company cannot show clean title to its own product.

Employment contracts for your first hires

The move from founders and freelancers to your first employees brings a new set of legal obligations, and getting employment contracts right from the first hire is considerably cheaper than fixing them after a dispute.

• Written statement of employment particulars: UK law requires this from day one of employment, not after a probation period, setting out pay, hours, holiday and notice terms.
• Confidentiality and IP assignment clauses: built into the employment contract itself, covering anything the employee creates during their employment.
• National Minimum Wage compliance: the National Living Wage for workers aged 21 and over rises to £12.71 an hour from April 2026, so check your pay rates against the current rate rather than a figure from a previous year.
• Contractor versus employee status: calling someone a contractor does not make them one. Getting employment status wrong exposes the company to back-pay, holiday pay and tax liabilities if HMRC or an employment tribunal later decides the individual was actually an employee or worker.
• Share option or bonus arrangements: if you plan to offer equity to early employees, this needs its own documentation, separate from the employment contract, and ties into the EMI scheme discussed below.

A written contract for every hire, reviewed once rather than adapted from whatever template is easiest to find online, is one of the lowest-cost pieces of legal work a startup will do relative to the risk it removes.

Raising investment: SEIS, EIS and EMI share options

Most early-stage UK investment rounds are structured around two tax-advantaged schemes, and it is worth understanding both before you approach investors, because eligibility depends on decisions you make about your company’s structure and share classes.

Under the Seed Enterprise Investment Scheme (SEIS), a qualifying company can raise up to £250,000 in total, and must have gross assets of no more than £350,000 and fewer than 25 full-time equivalent employees when the shares are issued. Investors can claim 50% income tax relief on up to £200,000 invested per tax year. Under the Enterprise Investment Scheme (EIS), which typically follows once a company has outgrown SEIS eligibility, investors can claim 30% income tax relief on investments of up to £1 million per tax year (£2 million if at least £1 million goes into knowledge-intensive companies). From 6 April 2026, most companies can also raise more under EIS: up to £10 million a year (£20 million for knowledge-intensive companies) and £24 million in total (£40 million for knowledge-intensive companies), with the gross assets limit rising to £30 million before the share issue and £35 million after it. Both schemes have detailed qualifying conditions on top of these headline figures, and getting the company’s structure or share terms wrong can disqualify investors from relief they were relying on, which is a difficult conversation to have after the money has already arrived.

Once you are ready to reward employees with equity, an Enterprise Management Incentive (EMI) scheme is usually the most tax-efficient route for a qualifying UK company. From 6 April 2026, the qualifying limits for EMI schemes increased significantly: the gross assets threshold rose from £30 million to £120 million, the employee headcount limit rose from 250 to 500, and the total value of unexercised options a company can have outstanding doubled from £3 million to £6 million. The individual limit per employee remains unchanged at £250,000 of unexercised options. This is a genuine widening of who can now use EMI, and it is worth checking your eligibility again even if you looked into it and ruled it out before April 2026.

GDPR and data protection basics

If your startup collects personal data, customer names, email addresses, payment details, even just an email newsletter sign-up, UK GDPR applies from day one, regardless of company size. There is no size-based exemption from the substance of the law, though most startups will need less onerous processes than a large enterprise handling higher-risk data. We have covered the wider compliance picture in our guide to UK cybersecurity and privacy laws.

• ICO registration: most organisations that process personal data must pay the ICO’s data protection fee unless a specific exemption applies. The fee is tiered by turnover and headcount: £52 for micro-organisations (turnover up to £632,000 or no more than 10 staff), £78 for small and medium organisations, and £3,763 for large organisations that fall outside those bands.
• Privacy notice: tells people what data you collect, why, and what you do with it, and needs to be genuinely accurate to your actual practices rather than a generic template.
• Lawful basis for processing: you need a clear legal basis, such as consent or legitimate interests, for each way you use personal data, and this needs recording, not just assuming.
• Data subject rights: you need a process for handling access requests, deletion requests and objections within the statutory timeframes.
• Data processing agreements: needed with any third-party supplier that processes personal data on your behalf, such as a hosting provider, email platform or payment processor.

Non-compliance is not just a fine risk. It is increasingly a due diligence issue: investors and enterprise customers now routinely ask early-stage companies for evidence of basic data protection compliance before signing a term sheet or a contract.

Standard commercial contracts and website terms

Beyond the documents already covered, most trading startups need a core set of commercial contracts before they take their first paying customer.

• Terms and conditions: govern your relationship with customers, including payment terms, liability limits and what happens if something goes wrong. Generic templates rarely reflect how your business actually operates, which is exactly where the protection falls short.
• Privacy policy: required wherever you collect personal data through your website or product, and should be consistent with your actual GDPR practices rather than copied wholesale from another business.
• Supplier and vendor agreements: set out what you are buying, on what terms, and what recourse you have if a supplier fails to deliver.
• Client or service agreements: particularly important for B2B startups selling services, setting out scope, deliverables, payment milestones and termination rights.

These documents are often the last thing founders think about, usually because a working product feels more urgent, but they are also the documents most likely to be tested in a dispute. A contract that has never been reviewed by a solicitor, adapted repeatedly from a free template, is a common feature in the commercial disputes we see reach litigation. Our broader guide to corporate legal services for businesses covers this in more depth, and our commercial contracts team can review the documents you already use.

Startup legal advice by stage of growth

Not every business needs every one of these in place on day one. The table below sets out a practical order for when startup legal advice typically becomes necessary, based on the stage your business has reached.

Why acting for both sides of a transaction matters

Because we act for founders and for investors, for employers and for employees, and for both landlords and tenants on the property side, we see the same agreements from every angle. That matters for startup legal advice in particular: a founders’ agreement, an investment term sheet or an employment contract reads differently depending on which side of the table you are sitting. Knowing what the other side typically asks for, and why, means we can draft your documents to hold up when they are actually tested, not just when everyone is getting along.

Getting started

None of this needs to happen in a single instruction or a single invoice. Most startups build up their legal foundations in stages, prioritising whichever gap creates the most immediate risk, whether that is an unclear founders’ agreement, an approaching investment round, or your first employee starting next month.

If you are working through any of these areas and would like it looked at properly, find out more about our legal services for startups or call us on 020 7566 1188. You can also reach us by email at info@gurvelegal.com.