Auto Insurance Calculator

A car insurance premium is not one price. It is six or seven separate coverages priced individually and then added together, and the declarations page shows each one. Most drivers never look, which is why they cannot say whether they are paying for liability, for physical damage, or for add-ons they forgot they bought.

This calculator adds those parts back up and shows the share each takes. That matters because the coverages behave completely differently: liability protects other people and is the part you cannot sensibly reduce, while collision and comprehensive protect a depreciating asset and eventually stop being worth their premium.

Result

Annual premium

$1,415

Monthly cost

$118

Six-month premium: $708
Before discounts: $1,580
Discount applied: $190
Liability and injury share: 48.73%
Physical damage share: 46.84%
Largest single coverage: Liability

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

Splitting the premium by coverage shows where the money actually goes. Physical damage cover (collision and comprehensive) is the part that can be dropped on an older vehicle.

Premium by coverage

Coverage	Annual premium	Share of total
Liability	$620	39.24%
Collision	$480	30.38%
Comprehensive	$260	16.46%
Uninsured motorist	$90	5.7%
Medical payments	$60	3.8%
Add-ons	$70	4.43%

How to use the auto insurance calculator

Open your declarations page and find the premium listed against each coverage.
Enter liability, collision, comprehensive, uninsured motorist and medical payments separately.
Add anything else - roadside assistance, rental reimbursement, glass cover - under add-ons.
Enter your total discount percentage and any policy fee, then read the split by coverage.

What people use this for

Working out how much of your premium would disappear if you dropped physical damage cover.
Comparing two quotes that bundle coverages differently.
Checking whether an add-on you forgot about is still on the policy.
Deciding which coverage to adjust when a renewal comes back higher than expected.

Worked examples

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

A financed newer car

Full coverage on a financed vehicle: $620 liability, $480 collision, $260 comprehensive, $90 uninsured motorist, $60 medical payments and $70 of add-ons, with a 12% multi-policy discount.

Annual premium: $1,415
Physical damage share: 46.84%
Largest single coverage: Liability

Liability only on an older car

The same driver after dropping collision and comprehensive on a car worth a few thousand dollars.

Annual premium: $703
Monthly cost: $59

What each coverage actually does

Liability pays for injury and damage you cause to other people. It is the part required by law in most places, the part with the highest possible payout, and the part it makes least sense to economise on - a serious at-fault accident can generate a claim far larger than any car is worth.

Collision pays to repair your own vehicle after an impact. Comprehensive covers non-collision loss: theft, fire, hail, flood, falling objects, animal strikes. Together they are called physical damage cover, and both are capped by the value of the car. Uninsured motorist cover fills the gap when the at-fault driver has no insurance or not enough of it.

Why the split matters more than the total

Two drivers paying the same total premium can be in completely different positions. One might be carrying high liability limits on an old car with no physical damage cover; the other might be carrying state-minimum liability with expensive collision cover on a vehicle worth very little.

The second driver has the worse policy at the same price. Seeing the split is the fastest way to notice that, and it is the reason this calculator reports the share each coverage takes rather than only the total.

Methodology and assumptions

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

The annual premium is the sum of the coverage premiums you entered, reduced by the discount percentage, plus any fees.
Shares are calculated against the gross premium before discounts, so they reflect the underlying pricing rather than the discount structure.
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

Where do I find the premium for each coverage?

The declarations page of your policy lists every coverage with its limit, deductible and premium. Your insurer will send a copy on request if you cannot find it.

Is "full coverage" a real thing?

Not as a defined product. It normally means liability plus collision plus comprehensive. What those limits and deductibles are still varies enormously between policies described that way.

When should I drop collision and comprehensive?

When the premium plus the deductible starts to approach what the insurer could ever pay out - the value of the car. The comprehensive coverage calculator on this site works that threshold out.

Does a six-month policy mean I pay less?

No. Auto policies are commonly written in six-month terms; the price is simply for six months rather than twelve. Double it to compare against an annual policy.

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