In the US, the deductible is the amount you pay out of pocket before your insurer contributes to a claim. Raise your deductible and your premium falls — but you take on more risk. The same idea exists in the UK and elsewhere under the name “excess.” This guide focuses on the US concept of deductibles: how they work, the different types, and the math that tells you what to choose.
What a Deductible Is
A deductible is a fixed amount you agree to pay toward each claim before the insurance company pays anything. It’s a risk-sharing arrangement: you take the small losses, the insurer takes the large ones.
| Claim Amount | Deductible | You Pay | Insurer Pays |
|---|---|---|---|
| $500 | $500 | $500 | $0 |
| $2,500 | $500 | $500 | $2,000 |
| $15,000 | $500 | $500 | $14,500 |
How Deductibles Affect Premiums
The trade-off is direct: a higher deductible means a lower premium, because you’re covering more of the small losses yourself. Car insurance is the clearest example.
| Deductible | Annual Premium | Annual Saving vs $0 |
|---|---|---|
| $0 | $1,500 | — |
| $250 | $1,250 | $250 |
| $500 | $1,050 | $450 |
| $1,000 | $850 | $650 |
| $2,000 | $700 | $800 |
The savings compress as you go higher. Moving from $0 to $250 saves $250; moving from $1,000 to $2,000 saves only $150. There’s a point of diminishing returns where the extra out-of-pocket risk isn’t worth the marginal premium saving.
Types of Deductibles
Not all deductibles are a flat dollar amount per claim.
| Type | How It Works | Where You See It |
|---|---|---|
| Per-claim (per-incident) | Paid every time you claim | Auto, renters, homeowners |
| Annual (aggregate) | Paid once per year across all claims | Health insurance |
| Percentage | A % of the insured value, not a flat amount | Homeowners (often for wind/hail damage) |
| Disappearing | Reduced by good claims history | Commercial and some auto policies |
Percentage deductibles matter for homeowners: a 2% deductible on a $400,000 home means an $8,000 out-of-pocket bill, not $1,000. Check your policy to see whether wind, hail, or hurricane damage is subject to a percentage deductible.
Does a Higher Deductible Pay Off? The Worked Math
The classic question: should you take the $1,000 deductible and save $450/year, or the $250 deductible?
| Scenario | $250 Deductible | $1,000 Deductible |
|---|---|---|
| Annual premium | $1,250 | $850 |
| Extra out-of-pocket if you claim | $0 | $750 |
| Premium saved each year | $0 | $450 |
Break-even point: The extra $750 risk is covered by the $450 annual saving in under 2 years. If you go longer than about 2 years without a claim, the higher deductible wins — and that’s the typical case. For most drivers, a $500-$1,000 deductible is the sweet spot.
But the rule breaks down if you claim frequently. Two claims at $1,000 deductible cost you $2,000 out of pocket — erasing several years of savings.
Choosing a Deductible Amount
| If you… | Choose |
|---|---|
| Have $2,000+ emergency savings | Higher deductible ($1,000+) — bank the savings |
| Have little or no savings buffer | Lower deductible — you can’t fund a big out-of-pocket hit |
| Rarely claim | Higher deductible |
| Claim often (e.g., young driver) | Lower deductible, or fix your driving instead |
| Want predictable costs | Lower deductible, accept the higher premium |
| Own a home with percentage deductibles | Match your deductible to what you could actually pay |
The rule to remember: never pick a deductible you couldn’t write a check for tomorrow. The premium saving is worthless if a claim means you can’t afford the deductible.
Common Pitfalls
| Pitfall | The Cost |
|---|---|
| Small claims trap | Claiming $700 damage with a $500 deductible nets you $200 but raises your premium for years — worse than self-paying |
| Confusing per-claim with annual | Two claims in a year with a $500 per-claim deductible = $1,000 out of pocket |
| Ignoring percentage deductibles | A 2% deductible is not “2%” in dollars anyone would recognise |
| Not saving the difference | If you don’t actually bank the premium saving, the higher deductible is pure risk |
| Assuming “waived” | Some insurers waive deductibles on glass/windshield claims — read the fine print |
Rule of thumb: only file a claim when the damage is at least 3x your deductible. Otherwise self-pay and preserve your claims-free discount.
How It Compares to the UK Excess
The UK “excess” is the same idea with one structural difference: it’s split into compulsory excess (set by the insurer, often higher for young drivers and theft) and voluntary excess (which you choose, exactly like a US deductible). Total excess = compulsory + voluntary, and you pay both on every claim. The US deductibles in this guide correspond to the voluntary part of a UK policy — the part you actually control.
Bottom Line
A deductible is the amount you pay before insurance pays. Raise it to cut your premium, but only to a level you could fund tomorrow from savings. Watch for percentage and aggregate deductibles that aren’t a flat dollar figure, never file claims under 3x your deductible, and remember the US deductible equates to the voluntary excess in UK policies. For most people a $500-$1,000 deductible balances savings against risk.
Getting the right deductible
Start by looking at your emergency fund. If you have $5,000 in accessible savings, a $1,000 deductible is comfortably within reach and will save you roughly $450 per year on car insurance compared with a $250 option. If your savings are thinner, a lower deductible protects you from a bill you cannot absorb.
Next, think about your claims history. If you have gone three or more years without a claim, the odds favour a higher deductible — you are statistically unlikely to need it, and the annual savings accumulate. If you are a newer driver or live in an area with frequent weather events, the lower deductible may be the wiser choice despite the higher premium. The math is simple, but the right answer depends on your personal risk tolerance and financial cushion.
What to watch out for
The small claims trap is the most expensive mistake policyholders make. Filing a claim for $700 of damage when your deductible is $500 nets you just $200 — but the claims surcharge on your next two or three renewals can easily exceed that amount. Insurers use claims history to price risk, and even a single at-fault claim can push your premium up by 20-40% for several years. Self-paying minor damage almost always costs less in the long run.
Watch out for percentage deductibles on homeowners policies too. A figure like “2%” sounds trivial until you realise it applies to your dwelling coverage, not the claim amount. On a $400,000 home that is an $8,000 bill you were not expecting. Read your declarations page carefully and keep enough set aside to cover a percentage deductible, not just the flat dollar amount you might assume.