Health Insurance Excess vs Co-payment: What You Pay

An excess and a co-payment both leave you paying part of an eligible claim, but they work differently. Insurers use different terms and claim rules, so check the policy schedule and wording rather than assuming one standard applies.

How an excess works

An excess is a set amount you pay towards eligible treatment. Depending on the policy, it may apply once per policy year, once per claim, or in another specified way. A higher excess can reduce the premium, but means you need to budget for more of the first eligible treatment costs.

How a co-payment works

A co-payment is usually a share of eligible costs that you pay, subject to the insurer's rules and any cap. Not every UK policy offers this option. Ask how the percentage is calculated, whether it applies to each claim, and whether there is a maximum you could pay.

Compare the total risk

Look at the premium, excess trigger, co-payment percentage and cap together. Check how multiple claims, family members and policy renewals are handled. The cheapest premium may not be the lowest-cost option if you need treatment.

For more on the other costs that can arise, see our guide to consultant fee shortfalls.

Compare policies and cover options with our UK health insurance comparison tool.

Sources checked 19 October 2026: PHIN: comparing private medical insurance · PHIN: private hospital pricing and insurance costs