Every Contract an Agency Needs in the UK (2026)

Last updated: February 2025

Legal Requirements for a Agency

UK agencies must comply with the Companies Act 2006 if incorporated, employment law for staff, and IR35 off-payroll working rules when engaging freelancers. The Advertising Standards Authority (ASA) Code applies to marketing and advertising agencies. Agencies handling personal data must comply with UK GDPR and the Data Protection Act 2018. The Consumer Rights Act 2015 applies to consumer-facing services. Agencies acting as employment businesses must comply with the Conduct of Employment Agencies and Employment Businesses Regulations 2003.

Essential Contracts

Master Service Agreement

The overarching contract governing the client-agency relationship, covering scope, fees, liability, termination, and IP ownership for all projects

Statement of Work Template

Project-specific document sitting under the MSA, defining deliverables, timelines, milestones, and acceptance criteria for each engagement

Freelancer or Contractor Agreement

IR35-compliant contracts for freelance talent, with IP assignment clauses ensuring work product belongs to the agency (and ultimately the client)

Employment Contract

Required for all permanent staff under the Employment Rights Act 1996, including restrictive covenants to protect client relationships

Recommended Contracts

Retainer Agreement

Documents ongoing monthly retainer arrangements with clients, including scope boundaries and rollover policies

Non-Disclosure Agreement

Protects client confidential information shared during pitches and project work, and your agency's proprietary processes

Intellectual Property Assignment

Chain of title from freelancer to agency to client — essential to prove the client receives clean IP ownership

Common Legal Risks for a Agency

IP ownership disputes if the chain of title from freelancer to agency to client is not properly documented
Scope creep on retainer agreements without clear boundaries and change request processes
IR35 liability for freelancers incorrectly classified as outside IR35
Client non-payment on large projects without milestone payment structures
Key staff leaving and taking client relationships without enforceable restrictive covenants

Industry-Specific Notes

Agencies should maintain a clear IP chain of title: freelancers assign to the agency, the agency assigns or licences to the client. The ASA Code requires agencies to ensure advertising is legal, decent, honest, and truthful. Digital agencies should also consider cookie consent compliance under PECR. Pitch work ownership should be addressed in pitch terms before any speculative work begins.

FAQ

Who owns the work an agency creates for a client?

By default under UK copyright law, the creator owns the work. For agency employees, the agency owns work created in the course of employment. For freelancers, the freelancer owns it unless there is a written IP assignment. The agency then needs to assign or licence the IP to the client. Without proper contracts at each stage, there can be gaps in the chain of title that leave clients without clear ownership and agencies exposed to claims.

Should an agency use a master service agreement or individual project contracts?

Best practice is to use both: a master service agreement (MSA) that covers the overall relationship terms (liability, IP, payment terms, termination) and individual statements of work (SOWs) for each project that detail specific deliverables and timelines. This avoids renegotiating core terms for every project while keeping project scope clearly defined.

How should an agency handle IR35 for its freelancers?

Since April 2021, medium and large agencies must determine the IR35 status of their freelancers and deduct PAYE if inside IR35. The agency should use HMRC's CEST tool, document the assessment, provide a Status Determination Statement to the freelancer, and maintain records. Contracts should reflect the genuine working arrangements — right of substitution, lack of control, and no mutuality of obligation.

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

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