Liability Caps in Contracts: What UK Market Standard Actually Looks Like

A liability cap is one of the most commercially significant clauses in any UK contract — and one of the most frequently misunderstood. Set it too low and you're left exposed when things go wrong. Accept a cap that's too low from a supplier and you may find their obligations are worthless in practice. Here's what UK market standard actually looks like, and when you should push back.

What Is a Liability Cap?

A limitation of liability clause restricts the total amount one party can recover from the other in the event of a breach of contract, negligence, or other legal wrong. Without one, a party's exposure could theoretically be unlimited — covering direct losses, consequential losses, and third-party claims.

Under Section 11 of the Unfair Contract Terms Act 1977, a limitation of liability clause in a B2B contract must satisfy a reasonableness test to be enforceable. Courts consider factors including the parties' relative bargaining power, whether the clause was negotiated, and what insurance cover was available. In practice, most commercially negotiated caps between sophisticated parties will pass this test.

What Does UK Market Standard Look Like?

There is no single "standard" liability cap — it depends heavily on the type of contract and the relationship between the parties. However, common market positions in the UK include:

• Technology and SaaS contracts: Cap typically set at 12 months' fees paid under the contract in the preceding 12 months. Some vendors push for 3 or 6 months; sophisticated customers often push for 24 months.
• Professional services (consultancy, agency): Cap often at the total contract value, or 12 months' fees. Professional indemnity insurance is usually required and the cap is often linked to the PI limit.
• Construction and engineering: Caps are more variable and often the subject of significant negotiation. JCT and NEC standard form contracts have their own built-in allocation of risk.
• Supply of goods: Cap often at the price paid for the goods in question, sometimes with a multiple (e.g., 2x purchase price).

What Is Typically Excluded From the Cap?

Even where a liability cap applies, certain categories of loss are commonly carved out — meaning they remain uncapped. Standard exclusions from the cap include:

• Death or personal injury caused by negligence (this cannot be excluded or limited under the Unfair Contract Terms Act 1977)
• Fraud or fraudulent misrepresentation
• Wilful default or gross negligence (often negotiated)
• Confidentiality breaches and data protection violations (increasingly common given GDPR exposure)
• IP infringement indemnities

When Should You Push Back?

You should negotiate the liability cap when:

• The supplier's cap is substantially lower than the risk you are transferring to them. If you are paying £500k for a critical system implementation and the supplier's cap is £50k, the cap is commercially meaningless.
• Consequential loss is excluded entirely. Many standard form contracts exclude "indirect and consequential loss" — but in many scenarios (particularly technology failures), your largest losses will be consequential (loss of profit, loss of contracts). Negotiate to include at least some categories of consequential loss explicitly.
• The cap applies symmetrically when it shouldn't. In some contracts, both parties are subject to the same cap — even though one party's realistic exposure is far greater than the other's.

The Interaction With Insurance

Always check that the liability cap is consistent with the supplier's insurance requirements. If you negotiate a cap of £2 million but the supplier is only required to hold £500k of professional indemnity insurance, there is a real risk that a large claim will not be paid in practice — even if it's legally valid.