Car Insurance Deductible Calculator
Two quotes, and the claims you expect
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Fill in the fields on the left and this updates as you type.
Know what this estimate is based on
- Jurisdiction
- General mathematical model
- Scope and limitations
- Educational estimate only. Confirm the assumptions, current rules, fees, and rounding that apply to your situation before making a decision.
- Source links checked
- Jul 30, 2026
Built and regression-tested by Smart Tools Lab. It has not been individually reviewed by a licensed financial, tax, or legal professional.
How to use
- 01
Get two quotes from your insurer for the same car, drivers and coverage: one at the deductible you have now and one at a higher deductible. Enter each annual premium beside its deductible — the page sorts them, so the order does not matter.
- 02
Enter the cash you could spend on a repair tomorrow without borrowing. It is the check against the higher deductible, and the line most people skip.
- 03
Enter how many years you expect to keep the coverage. It sets the dollar totals; the break-even frequency does not depend on it.
- 04
Check the claims-a-year field. It opens at 0.08, from Verisk/ISO 2024 figures published by the Insurance Information Institute — roughly one collision or comprehensive claim every 12 years. Raise it if your own record says you claim more often.
- 05
Read the break-even claims a year first, then the table: it prices both deductibles at claim frequencies from never to once a year, with your own figure and the break-even row marked.
Formula
Expected cost of each deductible over your horizon = (annual premium + claims a year × deductible) × years; the difference between the two totals is the headline. Break-even claims a year = premium saved a year ÷ extra deductible. Below that frequency the higher deductible is cheaper, above it the lower deductible is. Its reciprocal, extra deductible ÷ premium saved, is both the years between claims at break-even and the years of savings it takes to fund one extra deductible. A claim in the first year costs the extra deductible less one year's saving. The cash check is your ready cash minus the higher deductible. Every claim is charged the full deductible, because average claims sit well above either one.
Example
Two quotes for the same car: $2,638 a year with a $500 deductible and $2,336 with $1,000, kept five years, with $1,500 of ready cash and 0.08 claims a year. The higher deductible saves $302 a year in premium and adds $500 to each claim. Expected cost is $2,678 a year on the $500 deductible, $13,390 over five years, against $2,416 a year and $12,080 on the $1,000, so the $1,000 deductible is $1,310 cheaper. It breaks even at 0.60 claims a year, one claim every 1.7 years. A claim in the first year would leave you $198 behind — the extra $500 less one year's $302 saving — and the $1,500 of cash covers the $1,000 deductible with $500 to spare. Even at 0.25 claims a year the higher deductible still wins, by $885; with only $800 of cash, the page reports you $200 short of it.
Definitions
- Deductible
- The part of each collision or comprehensive claim you pay before the insurer pays the rest. It is charged per claim, not per year.
- Break-even claim frequency
- The number of claims a year at which two deductible quotes cost the same: the premium saved a year divided by the extra deductible.
- Collision coverage
- Pays to repair your own car after a crash, whoever caused it, less the deductible.
- Comprehensive coverage
- Pays for damage to your car from causes other than a collision — theft, hail, fire, a falling branch, an animal strike — less its deductible.
- Claim frequency
- Claims per 100 insured car-years, where a car-year is one vehicle insured for 365 days. Verisk/ISO put collision at 4.16 and comprehensive at 3.95 in 2024.
Good to know
A deductible is a bet on how often you claim
Every deductible choice trades a certain cost for an uncertain one. The premium is certain: you pay it every year whether or not anything happens to the car. The deductible is uncertain: you pay it only when you claim, and then you pay all of it at once. Raising the deductible moves money from the certain column to the uncertain one, and the only question is whether the move pays. The arithmetic is short. On the default quotes, the $1,000 deductible costs $2,336 a year and the $500 deductible $2,638, so the higher deductible saves $302 a year. In exchange, each claim costs $500 more. Divide one by the other and you have the break-even frequency: $302 ÷ $500 = 0.60 claims a year. Below that the higher deductible is cheaper; above it the lower deductible is. Turned upside down, the same division gives a period: $500 ÷ $302 is 1.7 years. As long as you go more than 1.7 years between claims, the premium you save outruns the extra deductible you pay. That period is also how long the savings take to build up one extra deductible's worth of cash, which is a useful way to picture it: each year without a claim banks another $302 toward the next one. Almost no driver claims every 1.7 years. That is why, for most people holding two sensible quotes, the higher deductible wins on expected cost, often by a wide margin — $1,310 over five years on these figures. The interesting questions are not about the average. They are about the size of the premium gap you are actually quoted, how often you in particular claim, and whether you could pay the deductible on the worst day rather than the average one.
What the claims data says about frequency
The input that decides the comparison is the one people have least feel for. Verisk's ISO data, published by the Insurance Information Institute, measures claim frequency in claims per 100 earned car-years, where a car-year is one vehicle insured for 365 days. In 2024 collision coverage saw 4.16 claims per 100 car-years and comprehensive coverage 3.95. A car carrying both therefore produces roughly 8 claims per 100 car-years, or about one claim every 12 years, which is where the page's 0.08 default comes from. The same data puts the average 2024 collision claim at $5,489 and the average comprehensive claim at $2,306. Both sit well above a $500 or a $1,000 deductible, which is why the page charges the full deductible on every claim rather than modelling claims smaller than the deductible. Averages hide a great deal. A driver with a long commute in a hail-prone state, or a car parked on the street, is likely to claim more often than the average; someone who drives a few thousand miles a year from a garage, less. Two effects push actual claim counts below the average for anyone on a higher deductible. First, a repair that costs between the two deductibles pays nothing under the higher one, so it never becomes a claim. Second, an at-fault claim can raise the premium for three to five years, so many drivers quietly pay small repairs themselves whatever their deductible. That behavior shows up as fewer claims, and it makes the higher deductible look better still. If you have your own history, use it: the claims you have made over the past ten years, divided by ten, is a reasonable estimate. Even a driver who claimed every four years — 0.25 a year — would find the $1,000 deductible $885 cheaper over five years on these quotes.
The cash test the average cannot see
Expected cost is an average over many years, and nobody pays averages. A deductible is due in full on the day the car goes into the shop, and a claim in the first year of a higher deductible leaves you behind: on the defaults, the extra $500 less one year's $302 saving is $198 out of pocket. That is small. The real risk is not having the $1,000 at all. In the Federal Reserve's survey of household finances in 2025, published in May 2026, 63% of adults said they would cover an unexpected $400 expense with cash or its equivalent. Put the other way, more than a third would not, and a $1,000 deductible is a bigger test than a $400 bill. For a household that would put the deductible on a credit card, the comparison changes: interest at a double-digit rate on $1,000, carried for months, eats into the premium saving, and a second claim in the same year doubles the problem. The page asks for the cash you could spend tomorrow without borrowing and compares it with the higher deductible. On the defaults $1,500 covers a $1,000 deductible with $500 to spare, and two claims in one year would take $2,000. With only $800 set aside, the page reports a $200 shortfall and says so. There is a practical way to get the best of both. Take the higher deductible, and put the premium you save each year into a savings account set aside for it. At $302 a year the extra $500 of deductible is funded in under two years, after which the higher deductible costs you nothing in liquidity and keeps saving premium. Until that account holds the deductible, the lower deductible is the safer choice for a household with no cash buffer. The emergency fund page sizes that buffer; this page only checks whether yours covers one deductible.
What a deductible does not touch
A deductible applies only to the coverages that pay for your own car: collision, which pays for crash damage whoever caused it, and comprehensive, which pays for theft, hail, fire, flood, a falling branch or an animal strike. Liability coverage, the part that pays for damage and injuries you cause to other people, carries no deductible at all, and it is often a large share of the premium. So raising the deductible never changes what happens when you hit someone else; it only changes what you pay toward your own repairs. That is why the premium credit for a higher deductible is smaller than it first looks. The Insurance Information Institute says raising a $200 deductible to $500 can cut the collision and comprehensive cost by 15% to 30%, and going to $1,000 can save 40% or more — but those percentages apply to the collision and comprehensive part of the bill, not the whole premium. Bankrate's January 2025 analysis of Quadrant Information Services rates put average full coverage at $2,638 a year with $500 deductibles and $2,336 with $1,000, a $302 difference on the whole bill. Your own quotes are the only figures that count, and they can differ in ways an average cannot show. Collision and comprehensive can carry different deductibles, glass damage is sometimes handled under its own terms, and a loan or lease contract can set a maximum deductible, so check it before raising yours. Two related questions live on other pages. Whether to file a particular claim at all, once the surcharge is counted, is the file-a-claim page's question. And the live car insurance cost page models a whole ladder of deductibles from typical premium credits; this page instead compares two premiums you have actually been quoted, which is the more reliable comparison whenever you can get them.
Frequently asked questions
Is a $1,000 deductible better than $500 on car insurance?
On the default quotes here, yes, by a wide margin. The $1,000 quote saves $302 a year, and the extra $500 of deductible only costs you when you claim. At the 0.08 claims a year that Verisk/ISO 2024 data suggests, the $1,000 deductible comes out $1,310 cheaper over five years. It stays cheaper until you claim about 0.60 times a year — once every 1.7 years — which is far more often than almost any driver claims. The real test is the other one on the page: whether you could pay $1,000 the day the car goes into the shop.
How do I work out the break-even point for a higher deductible?
Divide the premium you save a year by the extra deductible you take on: $302 ÷ $500 = 0.60 claims a year. Turned upside down, $500 ÷ $302 = 1.7 years, so the higher deductible wins as long as you go longer than that between claims. The same 1.7 years is how long the premium savings take to pay for one extra deductible.
How often do drivers actually file car insurance claims?
Verisk's ISO data, published by the Insurance Information Institute, put 2024 claim frequency at 4.16 collision claims and 3.95 comprehensive claims per 100 insured car-years. For a car carrying both, that is roughly one claim every 12 years. The average 2024 collision claim was $5,489 and the average comprehensive claim $2,306 — comfortably above a $500 or $1,000 deductible, so a typical claim pays out under either.
What if I cannot afford the higher deductible?
Then the premium saving is not really a saving. A deductible is due in full on the day of the claim, not spread across years. In the Federal Reserve's survey of household finances in 2025, published May 2026, 63% of adults said they would cover a $400 emergency expense with cash or its equivalent. If the higher deductible would go on a credit card, the interest eats into the saving. A middle route is to take the higher deductible and put the premium you save each year into savings until the account holds the deductible.
Does raising my deductible lower the whole premium?
No. The deductible applies to collision and comprehensive coverage, the parts that pay for your own car. Liability coverage, which pays for damage and injuries you cause to others, has no deductible and does not change. The Insurance Information Institute says raising a $200 deductible to $1,000 can cut the collision and comprehensive cost by 40% or more; Bankrate's January 2025 analysis of Quadrant rates found average full coverage fell from $2,638 at $500 deductibles to $2,336 at $1,000.
How is this different from the health insurance deductible calculator?
It asks a different question. A health plan comparison weighs premiums against how much medical care you expect to use in a year. A car policy's deductible is charged once per claim, and the question is how often you will claim. Nothing from a health plan comparison carries over, and the live car insurance cost page, which models a ladder of deductibles from typical premium credits, is the closer relative.
Will I claim less often with a higher deductible?
In practice, yes. A repair that costs between the two deductibles — $500 to $1,000 here — pays nothing under the higher one, so it never becomes a claim. And because an at-fault claim can raise your premium for three years or more, many drivers pay small repairs themselves anyway. Both effects make the higher deductible look better than the average frequency suggests.