UI/UX Designer Freelance Contract UK | Design and Prototyping Agreement
UI/UX designers working freelance in the UK face a specific set of risks: clients disputing who owns the final designs, scope expanding without additional pay, and late invoices going unpaid for months. A written contract fixes all three before work starts. It establishes the scope of design and prototyping deliverables, sets out intellectual property assignment under the Copyright, Designs and Patents Act 1988, and gives you statutory interest rights under the Late Payment of Commercial Debts Act 1998. For designers operating through a limited company, clear contract wording also helps demonstrate genuine self-employment and reduces IR35 exposure under Chapter 10 of ITEPA 2003. Whether you are taking on a single app redesign or an ongoing UX retainer, a properly drafted agreement protects both sides from day one. Generate yours now.
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Key clauses in a Freelance Contract
Intellectual Property Assignment
This clause determines when and how copyright in the design files, prototypes, and assets transfers from the designer to the client. Under the Copyright, Designs and Patents Act 1988, copyright in commissioned freelance work does not automatically vest in the client, so without an explicit assignment clause the designer retains ownership by default, which can block the client from using the work commercially.
Scope of Work and Revisions
This clause defines exactly which screens, flows, prototypes, and deliverable formats are included in the agreed fee, along with the number of revision rounds permitted. Without it, clients can reasonably argue that additional wireframe iterations or extra device breakpoints fall within the original brief, leaving the designer absorbing the extra time with no contractual basis to raise a change-order invoice.
Payment Terms and Late Interest
This clause states the fee, payment schedule, and the consequences of late payment, including the right to charge statutory interest at 8% above the Bank of England base rate under the Late Payment of Commercial Debts Act 1998. It also allows the designer to suspend delivery of final source files until all outstanding invoices are settled, giving real commercial leverage without resorting to litigation.
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Generate free →Frequently asked questions
Who owns the UI designs if I do not have a written contract?
Under the Copyright, Designs and Patents Act 1988, the designer who creates the work owns the copyright unless there is a written agreement transferring it. This means a client who commissions a full app interface without a contract may find they hold no legal right to the design files if the relationship breaks down. A written contract with a clear IP assignment clause removes that uncertainty for both parties.
Can my UI/UX freelance contract affect my IR35 status?
Yes. HMRC assesses IR35 status under Chapter 10 of ITEPA 2003 by looking at the working relationship in practice, but the written contract is the starting point for any investigation. Clauses that reflect genuine self-employment — such as a substitution right, no obligation of exclusivity, and payment by deliverable rather than time — support an outside-IR35 determination. A contract that reads like a disguised employment agreement can undermine your position even if the day-to-day reality is different.
Should I withhold design files if a client has not paid?
Yes, a well-drafted contract includes a clause explicitly reserving the right to withhold delivery of final source files, exported assets, and prototype links until payment is received in full. Without that clause, withholding files could theoretically be argued as a breach of contract on your part. Including it gives you a clear, agreed remedy that does not require court action to enforce, and it acts as a practical incentive for clients to pay on time.
The information on this page is for general informational purposes only and does not constitute legal advice. Contracto generates AI-assisted contract templates — they are not a substitute for advice from a qualified solicitor. For high-value or complex engagements, always seek independent legal review.