Auto Insurance Deductible Calculator

Raising a collision or comprehensive deductible is the quickest way to lower a car insurance premium. It is also the quickest way to create a bill you cannot pay in the same week your car is undriveable.

The decision reduces to two numbers: what the higher deductible saves each year, and how much more you would owe on a claim. This calculator compares two quotes and reports the break-even point between them.

Result

Claim-free years to break even

2.9 years

Annual saving

$170

Extra at risk per claim: $500
Saving over the horizon: $850
Net with no claims: $850
Net after one claim: $350
Net after two claims: -$150
Saving as share of premium: 14.41%

This is an estimate based on the values you entered. Actual premiums, coverage, eligibility and pricing vary by provider and by individual circumstances.

The higher deductible pays for itself in 2.9 claim-free years. Choosing it only makes sense if you can pay the extra 500 out of pocket on short notice.

How to use the auto insurance deductible calculator

Get quotes for the same coverage at two different deductibles - most carriers will show both.
Enter the annual premium and deductible amount for each.
Set the horizon over which you want to evaluate the choice.
Read the break-even years, then check the outcome after one and two claims.

What people use this for

Choosing between the deductible options shown on a new auto quote.
Deciding whether to raise a deductible at renewal to offset an increase.
Checking whether a very high deductible is worth the modest saving offered.
Working out how much cash to keep accessible for a car claim.

Worked examples

Every figure below is produced by running this calculator against the example inputs, so the numbers always match the tool.

Moving from $500 to $1,000

A $1,180 premium at a $500 deductible against $1,010 at $1,000, evaluated over five years.

Claim-free years to break even: 2.9 years
Annual saving: $170
Net after one claim: $350

Moving from $500 to $2,000

The same baseline against $880 a year at a $2,000 deductible.

Claim-free years to break even: 5 years
Annual saving: $300
Net after two claims: -$1,500

Collision and comprehensive usually have separate deductibles

Most auto policies set one deductible for collision and another for comprehensive, and they do not have to match. Comprehensive claims - glass, theft, hail, animal strikes - are often more frequent and smaller, which is why a lower comprehensive deductible can be worth more than a lower collision deductible.

Run the comparison separately for each rather than treating the policy as having one deductible.

The number the arithmetic cannot give you

Break-even analysis assumes you can always pay the deductible. In practice a car claim arrives at a bad moment and often alongside other costs, and a deductible you have to borrow to cover turns an insurance problem into a debt problem.

The practical rule is simple: if the deductible amount is not sitting in an accessible account, the lower deductible is the right choice whatever the break-even says.

Methodology and assumptions

What this calculator does, and what it deliberately does not do.

Break-even years divide the extra deductible exposure by the annual premium saving between the two quotes.
Claim scenarios subtract the extra exposure once or twice from the accumulated saving. Claim frequency is not predicted.
All figures are estimates produced from the values you enter. This site has no rate feed and no carrier data, so it cannot quote or price a policy.
Nothing you type is transmitted or stored - the calculation runs entirely inside your browser.

This calculator provides an estimate based on the information you enter. Actual insurance premiums, coverage, eligibility and pricing vary by provider and individual circumstances.

This website is not an insurance company, an insurance agency or a licensed broker. It does not sell insurance, does not provide insurance quotes, and is not authorised to give advice about which policy you should buy.

No result produced here is an offer of insurance or a guarantee of coverage. Only a licensed insurer or agent, working from your verified details, can quote or bind a policy.

Frequently asked questions

Does the deductible apply to liability claims?

No. Deductibles apply to claims for damage to your own vehicle. Liability coverage pays third parties and has no deductible on a standard personal auto policy.

What is a disappearing deductible?

An endorsement offered by some carriers that reduces your deductible for each claim-free year. It costs extra, so compare that cost against the reduction it provides.

Will I get the deductible back if the other driver was at fault?

Often yes, through subrogation - your insurer recovers from theirs and returns your deductible. It can take months, and it depends on fault being established.

Should collision and comprehensive have the same deductible?

There is no requirement that they do. Because comprehensive claims tend to be smaller and more frequent, many drivers keep that deductible lower.

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