Each step up the excess ladder — £0, £100, £250, £500 — typically cuts the premium by 10–20%, with discounts shrinking at each step. For most claim-free-in-a-typical-year adults, the maths lands in a sweet spot of £250–£500: real savings, affordable worst case, and small claims still worth making.
- ✓Each excess step typically saves 10–20%, but the discounts shrink as you climb.
- ✓If you claim less than once every couple of years, a higher excess usually wins.
- ✓Past £500, most people are taking on pounds of risk for pennies of saving.
The ladder: what each excess level saves
Insurers discount your premium as you agree to fund more of the early cost of each year's claims yourself. The discounts follow a consistent shape across the market: generous at the bottom of the ladder, stingy at the top. Here's how it plays out for an illustrative adult paying around £80/month — the 2026 UK average — at £0 excess.
| Excess | Typical discount vs £0 | Illustrative premium | Annual saving |
|---|---|---|---|
| £0 | — | £80/mo | — |
| £100 | ~5–10% | £72–£76/mo | ~£48–£96 |
| £250 | ~10–20% | £64–£72/mo | ~£96–£192 |
| £500 | ~20–30% | £56–£64/mo | ~£192–£288 |
| £1,000 | ~25–35% | £52–£60/mo | ~£240–£336 |
Notice the pattern: the jump from £500 to £1,000 roughly doubles your exposure but adds only a sliver of extra saving. The ladder's best value is in its middle rungs.
The break-even test
The decision comes down to one question: how often do you expect to claim? On most UK policies the excess applies once per person per policy year, so a claim year costs you the excess exactly once, however much treatment follows.
Take the £0 → £500 move saving roughly £240 a year. In a claim-free year you keep all £240. In a claim year you hand £500 back, so you're about £260 worse off than the £0-excess buyer. Break-even sits at claiming roughly once every two years. Claim less often than that — which describes most members in most years — and the higher excess wins over time.
- Claim most years? (ongoing physio, regular consultations) — stay low, £0–£100. You'll pay the excess so often it eats the discount.
- Claim once every 2–3 years? — the middle rungs, £250, are your zone. Meaningful saving, modest worst case.
- Rarely claim, insuring against the big event? — £500 makes sense; £1,000 only if the extra discount still clears about 5%.
Price every rung of the ladder
Why the sweet spot is £250–£500 for most people
Three forces converge on the same band. Below it, you're paying a meaningful premium loading for first-pound cover most people never use. Above it, the discounts flatten while your exposure keeps growing pound for pound — and small claims stop being worth making at all, since a £300–£500 private MRI would fall entirely inside a £750+ excess.
And remember the excess multiplies on family cover: where it applies per person, a family of four with a £500 excess could theoretically pay it several times in one unlucky year. Couples and families often sit one rung lower than a single adult would.
How to run your own numbers
Percentages are a guide; your quote is the truth. Get the same policy priced at £0, £100, £250 and £500 and write down the actual pound difference between each rung. Divide each extra chunk of excess by the extra annual saving it buys — when that ratio blows past roughly 10:1, you've climbed too far.
Two refinements worth a minute each. First, age shifts the pound values: a 60-year-old paying ~£88/month gets more cash back from the same percentage discount than a 30-year-old paying ~£38, so the higher rungs get relatively more attractive as you age — provided your expected claim frequency hasn't risen faster. Second, revisit the choice at every renewal. The sweet spot isn't a one-off decision; it drifts as your premium, health and finances do.
For the full mechanics — per-year vs per-claim wording, how you actually pay it, and how the excess interacts with the six-week option — see our guide to how the health insurance excess works. The wording matters as much as the number: 'per policy year' is the phrase you want to see before comparing anything.
Frequently asked questions
Where is the sweet spot for a health insurance excess?
For most adults, £250–£500. Each step up the ladder typically saves 10–20%, but discounts shrink as you climb, and past £500 you usually accept pounds of extra risk for pennies of saving. Frequent claimers should sit lower; families often pick one rung below what a single adult would.
How do I work out the break-even point on a higher excess?
Compare the annual premium saving against the extra excess you'd pay in a claim year. If moving from £0 to £500 saves about £240 a year, you break even claiming roughly once every two years. Claim less often than your break-even frequency and the higher excess wins over time.
Does the excess sweet spot change with age?
The band stays similar but the stakes rise. Older buyers pay higher premiums, so the same percentage discount is worth more pounds — which strengthens the case for £250–£500. But claim frequency also rises with age, so honest self-assessment about how often you'll claim matters more, not less.
Is a £1,000 excess ever the right choice?
Occasionally — for people using health insurance purely as big-event protection who could absorb £1,000 without strain. The test is whether the step from £500 still saves meaningfully (roughly 5%+). For most quotes it doesn't, which is why £1,000 sits past the sweet spot rather than in it.
Should couples pick the same excess sweet spot as singles?
Usually one rung lower. On most policies the excess applies per person per policy year, so a couple could pay it twice in one year — doubling the worst case while the premium saving stays roughly proportional. A £250 excess often does for a couple what £500 does for a single adult.