Setting the right business insurance excess is one of the most financially consequential decisions you make at renewal. Choose too low and you pay more in premiums than necessary. Choose too high and a single claim could put your cash flow under serious strain. This guide walks you through how to get that balance right.
What a Business Insurance Excess Actually Means
An excess is the portion of any claim you agree to pay before your insurer covers the remainder. If you have a £500 excess on a £4,000 employers' liability claim, your insurer pays £3,500 and you fund the rest.
Excesses exist because they discourage small, frequent claims that would be expensive for insurers to administer. They also give policyholders a financial incentive to manage risk carefully.
Compulsory Versus Voluntary Excess
Every commercial policy includes a compulsory excess, set by the insurer based on the policy type, your industry, and your claims history. This figure is non-negotiable.
On top of that, many policies allow you to add a voluntary excess. Accepting a higher voluntary excess signals to the insurer that you are willing to absorb more risk yourself, which typically results in a lower annual premium.
- Compulsory excess — fixed by the insurer; reflects underwriting risk
- Voluntary excess — chosen by you; directly influences your premium cost
- Combined excess — the total you pay on any single claim (compulsory plus voluntary)
It is the combined figure that matters most when you are assessing worst-case scenarios.
The Premium Trade-Off: When It Makes Financial Sense
Raising your voluntary excess can look attractive on paper, but the arithmetic only works in your favour under specific conditions.
A rough way to test it: divide the annual premium saving by the additional excess amount you are taking on. If a £500 increase in voluntary excess saves £80 per year, you would need to go more than six claim-free years before you break even. If your business operates in a sector with frequent minor incidents — construction, hospitality, or retail, for example — that calculation may not stack up.
The trade-off makes more sense if your claims history is clean, your sector carries lower incident rates, and your reserves can comfortably absorb the combined excess without disrupting operations.
Step-by-Step: Matching Your Excess to Business Risk
- Step 1 — Review your claims history. Pull records for the past three to five years. Note the frequency of claims, not just the value. Frequent low-value claims suggest a lower excess is safer.
- Step 2 — Calculate your maximum affordable outlay. Identify the cash or credit you could access within 30 days. Your combined excess should sit comfortably within that figure.
- Step 3 — Model the break-even point. Ask your broker for the premium difference between two or three excess levels. Calculate how many claim-free years you need for each option to pay off.
- Step 4 — Check excess terms carefully. Confirm whether the excess applies per claim or per event, and whether different sections of the policy carry different excesses. Public liability and property damage often differ.
- Step 5 — Revisit at every renewal. Your cash position, claims history, and risk profile change. An excess that made sense three years ago may no longer be appropriate.
The Cash Flow Impact of Getting It Wrong
A business insurance excess that looks manageable in isolation can become a serious problem when combined with other pressures. Settling a claim during a slow trading period, alongside payroll, VAT, or supplier payments, can expose gaps in working capital that were not obvious at renewal.
This is especially relevant for SMEs where a single large claim — say, escape of water at commercial premises or a liability dispute — could trigger an excess of several thousand pounds with little warning.
If you are unsure how your current cover fits your broader financial position, exploring your options through Aarubi's business insurance comparison service is a practical starting point.
Action Checklist
- Confirm the compulsory excess on each section of your current policy, not just the headline figure
- Check whether your voluntary excess is applied per claim or per policy year
- Calculate your combined excess across all policy sections
- Test whether your accessible cash reserves comfortably cover the highest combined excess
- Run a break-even analysis before increasing voluntary excess to chase a premium reduction
- Ask your broker to quote at two or three different excess levels so you can compare properly
- Flag any change in your risk profile — new staff, new premises, new activities — before renewal, as it may affect the compulsory excess your insurer applies
