GB
Starting a business in the UK involves more than simply registering a company. Understanding the key legal considerations when starting a business can help founders avoid costly mistakes, stay compliant and build a strong foundation for growth. As a London-based law firm, Founders Law has helped hundreds of startups and founders get their legal foundations right from day one without slowing down growth.
This UK startup legal checklist covers the essential steps to launch, protect and scale your business, backed by the commercial-first support of our experienced startup lawyers.
Business incorporation is the first legal step in creating a recognised company that can trade, hire employees, raise investment and enter into contracts.
Registering your business with Companies House is your first legal step in starting a company in the UK. It makes your business a recognised legal entity and allows you to start trading. The process is quick, affordable and can be done entirely online.
Checklist
• Register your UK company via Companies House
• Choose a company name and registered office address
• Decide your company structure (Ltd, LLP, etc.)
• Use either standard model articles or tailor them for your business
Formalising ownership arrangements early is one of the most important legal considerations when starting a business and can prevent disputes as your company grows.
It’s essential to formalise ownership, roles and responsibilities early to avoid disputes and ensure investor readiness. Clear agreements help your UK startup stay investor-friendly and compliant.
Checklist
• Sign a Co-Founders Agreement or Shareholders’ Agreement (SHA) to govern roles, decision-making and exits
• Allocate share capital and issue share certificates
• Put in place service or consultancy agreements for founders
Good corporate governance helps protect directors, support future fundraising and ensure your company remains compliant as it grows.
Keeping on top of company records protects directors and ensures ongoing compliance with UK corporate law.
Checklist
• Maintain board minutes, statutory registers and Companies House filings
• Record significant decisions and shareholder approvals
• Consider Directors & Officers (D&O) insurance to protect key decision-makers
Understanding your tax obligations from day one can help avoid penalties, improve financial planning and make future fundraising smoother.
Registering with HMRC and understanding your tax obligations early helps your business stay compliant and avoid penalties.
Checklist
• Register for Corporation Tax within three months of starting to trade
• Set up a business bank account and accounting system
• Explore VAT registration and check whether you meet the current threshold (£90,000)
• Consider securing SEIS/EIS advance assurance if you’re raising investment from UK investors
SEIS and EIS are government-backed tax relief schemes that can make investing in early-stage UK startups more attractive to investors.
The moment someone joins your business, whether as an employee or contractor, a range of legal obligations arise that need to be managed correctly.
Getting contracts in place and understanding UK employment law protects both your company and your team.
Checklist
• Use compliant employment contracts or consultancy agreements
• Check IR35 status for contractors to avoid tax surprises
• Create an employee handbook and workplace policies (e.g. leave, misconduct) — some are required by law
• Consider an employee option scheme (EMI or Growth Shares)
• Take out employers’ liability insurance, which is legally required as soon as you hire an employee
Data protection obligations apply from the moment you begin collecting personal information, not only once your business reaches scale.
If you collect personal data, you must comply with UK GDPR and data protection laws to avoid fines and build trust with customers.
Checklist
• Register with the ICO (UK data protection regulator)
• Create a privacy policy and cookie banner for your website
• Add data protection clauses to customer, supplier and contractor contracts
Protecting intellectual property is one of the most commonly overlooked legal considerations when starting a business, yet it is often one of a startup's most valuable assets.
Protecting your brand and intellectual property (IP) early is key to building long-term business value.
Checklist
• Assign any IP created by founders or contractors to the company
• Register your brand trademark in the UK (and internationally if needed)
• Use NDAs before sharing sensitive ideas externally
• Clarify IP ownership between group companies
Unclear or missing contracts are one of the most common causes of business disputes and can create unnecessary commercial risk.
Well-drafted commercial contracts protect your revenue, limit liability and create a clear legal framework with customers and partners.
Checklist
• Draft Terms of Business and website Terms & Conditions
• Put in place agreements with key suppliers
• Use tailored contracts for partnerships, resellers or affiliates
If your UK entity is part of a global group, ensure clear agreements on ownership, rights and cash flow.
Checklist
• Decide which company owns the IP and contracts with clients
• Put intra-group service, IP, or cost-sharing agreements in place
• Ensure your structure aligns with transfer pricing and international tax requirements
Certain industries have additional regulatory obligations that need to be addressed before launch and throughout the life of the business.
Certain industries — like fintech, insurance, and crypto — have specific UK regulatory obligations. Getting these right from the start helps you avoid compliance issues or enforcement action.
Checklist
• Check if you need FCA registration or a relevant licence
• Obtain any industry-specific approvals or insurance
• Review your ongoing compliance obligations, especially around payments, data, or health
Fintech, crypto and health tech businesses often face more extensive regulatory requirements than other startups. Founders Law regularly works with founders across these sectors to help them navigate compliance and growth with confidence.
The main legal considerations include incorporation, shareholder arrangements, tax registration, employment contracts, data protection, intellectual property protection and commercial agreements. The exact requirements will depend on your business model and sector.
No, it is possible to start a business without a lawyer. However, legal advice can help founders avoid mistakes that become expensive or difficult to fix later, particularly when raising investment or hiring employees.
Most startups will need incorporation documents, founder agreements, shareholder agreements, employment or consultancy agreements, privacy policies, terms and conditions and commercial contracts.
A shareholders agreement sets out how key decisions are made, how shares can be transferred and what happens if a founder leaves. While not legally required, it is highly recommended for businesses with multiple shareholders.
You must register for VAT when your taxable turnover exceeds the current threshold. Some businesses choose to register voluntarily before reaching the threshold depending on their customers and growth plans.
At Founders Law, our London-based team works with startup founders across the UK, helping businesses navigate the legal considerations that come with launching, scaling and raising investment.
From incorporation and founder agreements to IP protection, employment law and regulatory compliance, we provide practical, commercially focused legal support designed for growing businesses. We also offer flexible pricing options to help founders access the support they need at every stage of growth.
If you're looking for startup lawyers in London who understand the realities of building a business, we'd love to hear from you. Get in touch with our team to discuss your startup and how we can help.
