If you keep doing work for the same client, or keep buying from the same supplier, negotiating a full contract every time slows everything down. A master service agreement fixes that. You agree the legal terms once, and each new piece of work is ordered underneath them.
This guide explains what a master service agreement (MSA) is, how it fits with statements of work, what it should include under UK law, and the payment, liability and termination points worth checking before you sign one.
What is a master service agreement?
A master service agreement is an umbrella contract that sets the terms for an ongoing business relationship. It covers the points that stay the same from job to job: payment mechanics, liability, confidentiality, intellectual property, data protection and how the relationship can end.
The details of each individual job, such as what is being delivered, by when and for how much, sit in a separate document ordered under the MSA. That is usually a statement of work, but it may be called an order form, work order or schedule.
You may also see an MSA described as a framework agreement or umbrella agreement. In private business-to-business dealings these terms usually mean the same thing. (“Framework agreement” has a more specific meaning in public sector procurement, where buyers appoint suppliers to a framework under procurement law, but that is a different arrangement from the one covered here.)
When does a business need an MSA?
An MSA earns its place when the relationship is ongoing or likely to repeat. Common examples include:
- a marketing, design or IT agency delivering successive projects for the same client
- a managed service provider supplying support on a rolling basis
- a consultancy placed on a client’s approved supplier list
- an outsourced function, such as payroll, facilities or customer support
For a genuine one-off job, a standalone services agreement or well drafted terms of business is usually simpler. The MSA’s value comes from reusing the same terms across many pieces of work.
Master service agreement vs statement of work
The easiest way to think about it: the MSA sets the rules, and the statement of work (SOW) describes the job. A typical SOW sets out:
- the services and deliverables for that project
- timescales, milestones and acceptance criteria
- the fees or rates and how they are invoiced
- the people or roles involved and any project-specific assumptions
Legally, each signed SOW usually forms its own contract that incorporates the MSA’s terms. That matters in practice. It means each piece of work can be priced, delivered and ended separately, while the core legal protections carry across all of them.
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What should a master service agreement include?
Most MSAs follow a familiar structure, but the commercial impact sits in the detail. These are the clauses worth reading closely.
Scope and ordering process
The MSA should describe the types of services that can be ordered and, just as importantly, how an order becomes binding. If the process is vague, work can start on an informal email with no SOW in place, which leaves both sides unsure what was agreed.
Payment terms
The MSA normally sets the payment mechanics (invoicing, payment period, disputed invoices) while the SOW sets the numbers. If a contract says nothing about interest, UK law gives the supplier a fallback. Under the Late Payment of Commercial Debts (Interest) Act 1998, a business can claim statutory interest at 8% above the Bank of England base rate on late business-to-business payments, plus a fixed sum of £40, £70 or £100 per invoice depending on its size. If the contract sets its own interest rate, that rate applies instead.
Liability and indemnities
This is where most of the risk sits. Look at the overall liability cap, what losses are excluded, and any indemnities that sit outside the cap. Some limits are set by law. Under section 2 of the Unfair Contract Terms Act 1977, liability for death or personal injury caused by negligence cannot be excluded at all. Where one side contracts on the other’s standard terms, many other exclusions and caps are only effective if they are reasonable. A cap that looks fine in the MSA can also become meaningless if an SOW for a much larger project sits under it, so check whether the cap is per SOW, per year or across the whole relationship.
Intellectual property
Who owns what the supplier creates? A common approach is that the supplier keeps its pre-existing materials and tools, while ownership of project deliverables passes to the client, sometimes only on payment. Whatever is agreed, it needs to be clear, because the default legal position may not match what either side expects.
Confidentiality and data protection
Confidentiality terms protect information shared across every project. Where the supplier handles personal data on the client’s behalf, UK GDPR requires a written contract with specific processing terms (under Article 28). These are often set out in a data processing schedule to the MSA so they apply to every SOW automatically.
Service levels
For ongoing services, the MSA or SOW may include a service level agreement with response times, performance targets and service credits if targets are missed. Check whether service credits are the client’s only remedy or sit alongside other rights.
Governing law and dispute resolution
The MSA should state that it is governed by the law of England and Wales (or another chosen jurisdiction) and set out an escalation process, such as senior management discussions followed by mediation, so disagreements are handled early and commercially.
Order of precedence and change control
Two clauses in the MSA do a lot of quiet work, and they are often overlooked.
The order of precedence clause says which document wins if the MSA and an SOW conflict. Many MSAs let the SOW prevail, which makes sense for project details. The risk is that an SOW, drafted quickly by a delivery team, overrides the carefully negotiated liability cap or payment terms without anyone noticing. A common fix is to let SOWs prevail generally, but not over the MSA’s liability, IP and data protection clauses unless the SOW expressly says so.
The change control clause sets out how scope, timescales and fees can be changed mid-project. Without one, changes creep in through emails and conversations, and arguments about what is in scope (and who pays for extras) follow.
Watch out for purchase orders and competing terms
A problem that catches many businesses out is the battle of the forms. The client raises a purchase order with its own standard terms printed on the back, the supplier accepts the order, and suddenly there is an argument about whether the MSA or the purchase order terms apply.
A well drafted MSA deals with this directly. It states that the MSA governs all orders, and that terms on purchase orders, invoices or order acknowledgements have no effect. It is worth making sure your own ordering process follows the MSA in practice too.
Whose master service agreement do you sign?
Either party can put forward the MSA, but in reality, it is usually the side with more leverage. If you are a smaller supplier, say a Manchester agency or consultancy working with a national customer, expect to be handed their template, drafted to protect them.
That does not mean it cannot be negotiated. Focus on the points that genuinely matter to your business, typically the liability cap, indemnities, payment period, IP ownership and termination rights, rather than trying to rewrite everything.
Payment risks to check before you sign
Payment clauses are where legal drafting and cash flow collide. Watch for:
- Long payment periods. Government guidance says agreed business-to-business payment terms should usually be within 60 days, and anything longer must be fair to both sides.
- Acceptance traps. If you cannot invoice until the client formally accepts a deliverable, vague acceptance criteria can delay payment indefinitely.
- Rights to withhold. Broad rights to withhold or set off payment against disputed amounts shift leverage heavily to the paying side.
- Pay-when-paid wording. Payment that depends on your client being paid by its own customer passes their risk on to you.
- Price reviews. For multi-year MSAs, check whether rates can be reviewed or indexed, or whether you are locked in.
Ending a master service agreement
Termination clauses set out how the relationship can end. Some MSAs allow either party to terminate for convenience on notice. Others only allow termination for breach or insolvency. The difference matters: if the relationship stops working commercially but nobody is in breach, you could be locked in.
Check what happens to live SOWs when the MSA ends. Usually, the MSA’s terms continue to govern any SOW already running until it is completed or terminated separately. Also check which clauses survive termination, such as confidentiality, IP licences and payment for work done, and whether there are exit obligations like handing back data or helping with a transition.
If the services involve an organised team doing work for one client, a change of provider can also bring the Transfer of Undertakings (Protection of Employment) Regulations 2006 (TUPE) into play, meaning staff may transfer to the new provider. Outsourcing-style MSAs often include TUPE indemnities for this reason.
Supplying goods rather than services?
The same structure works for recurring supply of goods, usually through a master supply agreement or framework supply agreement with individual purchase orders underneath. The terms focus more on ordering, forecasts, delivery, risk and title, and product warranties, but the principles of consistent core terms and clear order of precedence are the same.
Advantages and disadvantages of an MSA
The advantages are straightforward. New work starts faster, terms are consistent across projects, risk is allocated once rather than renegotiated each time, and legal costs fall over the life of the relationship.
The drawbacks are real too. A first MSA can take time to negotiate, particularly on liability. It can go out of date as the relationship changes, so it needs reviewing periodically. And if SOWs are drafted carelessly, they can undermine the protections the MSA was meant to provide.so it needs reviewing periodically. And if SOWs are drafted carelessly, they can undermine the protections the MSA was meant to provide.
Need help with a master service agreement?
Our solicitors draft and review master service agreements for businesses in Manchester and across the UK, whether you need your own template to use with clients or want a customer’s MSA checked before you sign. If you are setting up an ongoing supply or services relationship, get in touch for a no-obligation conversation.