Liability Limit
A liability limit is the maximum amount an insurer will pay for any single liability claim or in total over the policy period. Choosing the right limit is one of the most consequential decisions in business and personal insurance — too low, and you are personally exposed to the excess.
Definition
A liability limit (also called the "limit of indemnity") is the ceiling on what the insurer will pay for a covered liability claim. It is stated in the policy declarations — typically as a "per occurrence" or "per claim" limit, and sometimes accompanied by an "aggregate" limit covering total claims in the policy year.
Liability insurance is fundamentally open-ended in exposure: there is no inherent cap on what a court might award against you. The policy limit is the cap the insurer has agreed to underwrite. Everything above that limit is yours to pay personally or through your business assets.
Common liability limit structures
Per claim / per occurrence
The maximum the insurer pays for any single claim or incident. Most liability policies are structured this way. A £2m per-claim limit pays up to £2m on any one event.
Annual aggregate
The total the insurer pays across all claims in one policy year. Once the aggregate is exhausted, no further claims are paid until renewal. Particularly important for high-claim-frequency businesses.
Combined single limit (CSL)
A single limit applying to both bodily injury and property damage combined. Common in motor liability. The entire limit can be applied to either component.
Split limits
Separate limits for bodily injury per person, bodily injury per occurrence, and property damage. Less common in UK commercial policies but prevalent in US-originated insurance.
How to choose the right limit
Liability limit selection is risk-specific. The key questions:
- What do your client contracts require? Many client terms specify minimum PI and PL limits — commonly £1m, £2m, or £5m. Comply with the highest contractual minimum.
- What is the worst plausible loss you could cause? A graphic designer is unlikely to cause a £5m loss; an IT contractor working on critical infrastructure might. Scale the limit to realistic maximum exposure.
- What are industry norms? Solicitors, architects, financial advisors, and medical professionals typically carry very high PI limits set by professional body rules. Check your professional association's guidance.
- What is the premium differential? Moving from £1m to £2m typically adds 20–40% to the premium — often a modest absolute cost relative to the additional protection. Always compare both options when buying.
For more on the covers that use liability limits, see public liability vs professional indemnity and our article on business liability explained.
Liability limit FAQ
Frequently asked questions
- If a judgment is entered against you for an amount exceeding your policy limit, your insurer pays up to the limit and you are personally responsible for the remainder. For individuals, this can mean claims against personal assets, including savings and property. For businesses, it can mean the company faces insolvency. This is why choosing an adequate limit is more important than the premium difference between limit levels — the cost of increasing from £1m to £2m is usually modest, but the exposure difference is significant.
- This depends on the policy wording. Some liability policies pay legal defence costs "in addition to" the limit — meaning the full limit is available for damages even after defence costs are incurred. Others pay defence costs "within the limit" — reducing the available indemnity. For PI policies in particular, check whether the limit is "inclusive" or "exclusive" of defence costs. Inclusive limits provide effectively less cover for damages if the insurer spends heavily defending a claim.
- Most liability policies specify a limit "per occurrence" or "per claim" — the maximum for any single incident. Many also have an aggregate limit — the maximum for all claims combined in a policy year. If you have a £2m per claim limit and a £4m aggregate, and you face three claims, the aggregate would be exhausted after the second large claim. For businesses with significant claim frequency, the aggregate limit matters as much as the per-claim limit.
- Check your client contracts — many specify minimum required limits. Consider the scale of potential financial loss your work could cause — a software error on a large financial system could cause millions in losses. Review industry norms — in some professions (legal, medical, financial advice), very high limits are standard. And consider your personal or business asset base — if a claim exceeds your limit, your assets are at risk. Review limits at renewal, not just at inception. See our guide on PL vs PI insurance for context on liability covers.