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.