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One clause. Potentially unlimited exposure. Here's what you need to know.
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ATCMS Blog
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A liability cap is one of the most important clauses in any commercial contract — and one of the most misunderstood by small business owners.
What is a liability cap?
A liability cap limits the maximum amount one party can be held responsible for if something goes wrong. For example, if a supplier causes £500,000 worth of damage to your business but the contract has a liability cap of £10,000, you can only claim £10,000 — regardless of the actual loss.
Liability caps are standard in most B2B contracts, SaaS agreements, and service contracts. They protect both parties from catastrophic claims that could destroy a business.
Why does it matter for SMEs?
Large enterprises have legal teams that scrutinise liability caps as a matter of course. SMEs typically don't. This creates a dangerous imbalance — you might sign a contract with a liability cap so low it offers you no real protection, or so high it exposes your business to unlimited risk.
Common liability cap structures include:
Capped at contract value — the most common. If you're paying a supplier £5,000/year, their liability is capped at £5,000. Low, but standard.
Capped at insurance value — tied to the supplier's insurance policy. More protection, but you need to verify the insurance exists.
Uncapped — rare, and usually a red flag. Either party can be liable for any amount.
Mutual vs one-sided — some contracts cap only one party's liability. Always check whose liability is being limited.
What should UK SMEs watch for?
When reviewing a contract, look for these warning signs:
The liability cap only applies to one party (usually the vendor)
The cap is set below the realistic value of potential damage
There are broad exclusions that remove the cap in certain situations
Force majeure clauses are used to avoid liability entirely
How to negotiate a liability cap
If a supplier offers you a contract with a low liability cap, you can negotiate. Ask for the cap to be set at a multiple of the annual contract value (2x or 3x is common), or tied to their professional indemnity insurance limit.
Always ensure the cap covers both direct and consequential losses. Many contracts exclude consequential losses entirely — meaning if their software failure causes you to lose a major client, you can't claim for that lost revenue.
The bottom line
A liability cap isn't just legal jargon. It's a financial safety net — or a trap, depending on how it's written. Every SME should know the cap in every contract they sign.
AI-powered contract analysis tools like ATCMS can instantly identify the liability cap in any contract, flag whether it's one-sided, and compare it against industry benchmarks — so you never sign away your protection without knowing it.
