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Consultancy Agreement UK: Key Terms & Drafting Tips

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Written by Brad Askew Solicitor (non-practising)
Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice.
Updated June 2026 · England & Wales
When a consultant takes on a piece of work for a business, putting the arrangement in writing protects both sides. A Consultancy Agreement is the document that captures what the consultant will do, what they will be paid, who owns the work produced, and what happens if things go wrong. Without one, the relationship rests on emails, phone calls and assumptions, which is rarely a comfortable place to be when a dispute surfaces months later. This guide walks through the key terms that tend to appear in a UK consultancy contract, the commercial and legal issues they address, and the practical points worth thinking about before either party signs. Whether you are the consultant offering services or the client engaging them, the same document is doing work for you both.

What this document is

A Consultancy Agreement is a commercial contract between a business (the client) and an independent consultant who is engaged to provide specific services. The consultant is not an employee. They run their own business, invoice for their time or deliverables, and take responsibility for their own tax and National Insurance.

The agreement sets out the commercial bargain: what services are being bought, on what timetable, for how much, and on what terms. It also handles the less obvious issues that tend to cause friction later, such as who owns any materials the consultant produces, what happens to confidential information, how either side can end the arrangement, and whether the consultant can take on competing work.

In the UK, these contracts sit alongside a web of related issues including IR35 and off-payroll working rules, data protection obligations, and general contract law principles. A well-drafted agreement does not just record the deal, it also signals to HMRC and the courts that the relationship really is one of self-employment rather than disguised employment.

How to use this document

  1. Define the services precisely. Vague descriptions of the work are the single biggest source of later argument. Set out the deliverables, the timescales, any performance standards, and what is specifically excluded. If the scope is likely to evolve, include a simple change-control process so that new work is documented and priced rather than absorbed for free.
  2. Agree fees, expenses and invoicing terms. State the rate clearly, whether it is a day rate, fixed fee, milestone-based or retainer. Spell out what expenses are reimbursable and what evidence is needed. Set the invoicing frequency, payment terms, and what happens if invoices are paid late. Being specific here protects the consultant's cash flow and removes room for dispute.
  3. Address intellectual property ownership. Under UK law, a contractor generally retains copyright in what they create unless the contract assigns it. Most clients expect to own the deliverables once they have paid for them, so the agreement should include a clear assignment of IP in the work product, while allowing the consultant to keep rights in any pre-existing tools or methods they bring with them.
  4. Deal with confidentiality, data and restrictions. Consultants often see sensitive commercial information. The contract should impose clear confidentiality obligations, cover any personal data handling under UK GDPR, and set out any restrictions on taking on competitors. Post-termination restrictions need to be reasonable in scope and duration to be enforceable under English law.
  5. Set out termination, liability and status. Include notice periods, grounds for immediate termination, and what happens to work in progress and final payments on exit. Cap liability at a sensible level for both parties. Finally, make the self-employed status explicit and confirm that the consultant is responsible for their own tax, addressing IR35 and off-payroll working where the client is in scope.

Common questions

If you're dealing with this kind of situation, speak to an experienced legal adviser who can walk you through it — from £149.

Common questions

Q Is a Consultancy Agreement legally binding in the UK?
Yes. Once both parties have signed and the usual contract elements are present (offer, acceptance, consideration and intention to create legal relations), a Consultancy Agreement is enforceable under English contract law. Electronic signatures are generally acceptable for this type of commercial contract. It is the written record of the deal, so each side can rely on its terms if a dispute arises later.
Q What is the difference between a Consultancy Agreement and an Employment Contract?
A Consultancy Agreement engages a self-employed individual or their company to deliver services, usually on a project or time-limited basis. An Employment Contract creates an employer-employee relationship with statutory rights such as holiday pay, sick pay and protection from unfair dismissal. A consultant invoices for their work and handles their own tax, whereas an employee is paid through PAYE with tax and National Insurance deducted at source.
Q Do I need to worry about IR35 with a consultant?
Possibly. IR35 and the off-payroll working rules look at whether a contractor engaged through their own company is, in reality, working like an employee. If the client is a medium or large business, the client is usually responsible for assessing status. Small clients and the contractor's own company may carry that responsibility in other cases. The written contract matters, but so does how the relationship works in practice.
Q Who owns the intellectual property created by a consultant?
By default under UK law, the consultant (not the client) owns the copyright in original work they create, even if the client has paid for it. For the client to own the output, the agreement needs an express assignment of intellectual property rights. Most well-drafted Consultancy Agreements include this, along with a carve-out for any pre-existing materials the consultant brings to the engagement.
Q Can either party end the agreement early?
Usually yes, provided the contract sets out how. Most Consultancy Agreements allow either side to terminate on notice, with a shorter fuse for serious breaches such as non-payment, insolvency or a material failure to perform. The agreement should also say what happens to outstanding fees, work in progress, and confidential materials on exit. Without clear termination wording, ending the arrangement cleanly becomes much harder.
Q Should a consultant have their own insurance?
In most cases, yes. Professional indemnity insurance covers claims arising from errors or omissions in the consultant's work, and many clients insist on it as a contractual requirement. Depending on the type of work, public liability and cyber insurance may also be appropriate. The agreement often specifies minimum cover levels and requires the consultant to maintain that cover throughout the engagement.
Q Can a consultant work for competitors at the same time?
That depends on what the contract says. Non-compete clauses in consultancy agreements can be valid under English law, but only if they go no further than is reasonably necessary to protect legitimate business interests. Blanket bans tend to fail. A more enforceable approach is to restrict specific competitors, specific clients, or specific confidential information, for a limited period after the engagement ends.
If you're dealing with this kind of situation, speak to an experienced legal adviser who can walk you through it — from £149.

Sources

This guide is based on primary UK law and official guidance.

Brad Askew, Solicitor (non-practising)

Written & reviewed by

Brad Askew Solicitor (non-practising)

Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice. LegalDocuments.co.uk is not a law firm and does not provide regulated legal advice.

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Legal disclaimer
This article is for general information only. It is a tool to help you find your way — not legal advice, and not a substitute for speaking to a qualified adviser about your situation.