Every Contract a Freelancer Needs in the UK (2026)

Last updated: February 2025

Legal Requirements for a Freelancer

UK freelancers may operate as sole traders or through a personal service company (PSC). IR35 legislation (off-payroll working rules) is the most significant legal consideration — the client determines IR35 status for medium and large businesses since April 2021. Freelancers must register for self-assessment with HMRC. Those earning above the VAT threshold (currently £90,000) must register for VAT. UK GDPR applies if processing personal data. The Consumer Rights Act 2015 applies to services provided to consumers.

Essential Contracts

Freelance Service Agreement

Defines the scope, deliverables, payment terms, and cancellation rights — your primary legal protection for every engagement

IR35-Compliant Contract

Structured to demonstrate genuine self-employment with right of substitution, no mutuality of obligation, and control clauses that support outside-IR35 status

Privacy Policy

Required under UK GDPR if you collect any personal data from clients, website visitors, or project stakeholders

Invoice Terms and Late Payment Policy

Formalises payment terms and your right to charge interest under the Late Payment of Commercial Debts (Interest) Act 1998

Recommended Contracts

Non-Disclosure Agreement

Mutual NDA protecting both your methods and processes and the client's confidential information

Project Change Request Template

Documents scope changes formally, preventing unpaid scope creep that is the biggest financial risk for freelancers

Intellectual Property Licence or Assignment

Clarifies whether you are assigning or licensing IP to the client — affects your ability to reuse work and portfolio rights

Common Legal Risks for a Freelancer

  • IR35 determination placing you inside IR35, increasing tax liability by 20-25% with no recourse
  • Late payment or non-payment without enforceable contractual terms
  • Scope creep without documented change request procedures eating into margins
  • Client claiming ownership of all IP including your pre-existing tools and templates
  • Personal liability exposure as a sole trader without contractual liability caps

Industry-Specific Notes

Freelancers working through recruitment agencies face different IR35 considerations than those contracting directly. The right of substitution clause must be genuine, not just contractual — HMRC will look at the practical reality. Professional indemnity insurance is essential for consultants, designers, developers, and writers. Consider using the IPSE (Association of Independent Professionals) contract templates as a starting point.

FAQ

How do I make sure my freelance contract is IR35 compliant?

An IR35-compliant contract should include a genuine right of substitution (you can send someone else to do the work), no mutuality of obligation (neither party is obliged to offer or accept work), and demonstrate that the client does not control how you do the work. However, HMRC looks at the actual working practices, not just the contract wording. If your contract says you can substitute but in practice you never could, HMRC will disregard the contract.

Can a freelancer charge interest on late invoices without a contract clause?

Yes. The Late Payment of Commercial Debts (Interest) Act 1998 gives all businesses, including freelancers, a statutory right to charge interest at 8% above the Bank of England base rate on late B2B payments, plus a fixed compensation amount (£40-£100 depending on debt size). However, having this explicitly stated in your contract and invoice terms makes enforcement much easier and acts as a deterrent.

Who owns the intellectual property a freelancer creates — the freelancer or the client?

By default under UK copyright law (Copyright, Designs and Patents Act 1988), the creator owns the copyright — unlike employees, where the employer owns work created in the course of employment. This means freelancers own their work unless they have signed an IP assignment agreement. Clients often assume they own everything they pay for, so clarity in the contract is essential to avoid disputes.

Related Business Types

Sole Trader

Consultancy

Agency

All the contracts a freelancer needs

AccountsOS generates UK-compliant contracts tailored to your business. From £10/month.

Get Started Free

This is guidance, not legal advice. Consult a solicitor for complex matters.

View all business types