Your car insurance premium is not one price. It is the sum of several separate coverages, each priced on its own, plus or minus discounts, surcharges and fees. Liability coverage, collision, comprehensive, uninsured motorist, medical coverage and optional extras each carry their own line on your declarations page. Once you understand that breakdown, you can see exactly where your money goes and which changes will actually lower your bill.
This guide walks through each part of a typical premium, shows example breakdowns for three different drivers using percentages rather than dollar amounts, and explains how to read your own declarations page.
Table of Contents
The Building Blocks of a Car Insurance Premium
| Premium component | What it pays for | Main price drivers |
|---|---|---|
| Bodily injury liability | Injuries you cause to others | Limits, location, driving record, age |
| Property damage liability | Damage you cause to others’ property | Limits, location, driving record |
| Uninsured/underinsured motorist | Your injuries when the at-fault driver is uninsured or underinsured | Limits, state uninsured driver rate |
| PIP or MedPay | Medical bills for you and passengers | State rules, limits |
| Collision | Damage to your car in a crash | Vehicle value and repair costs, deductible, record |
| Comprehensive | Theft, weather, fire, vandalism, animals | Vehicle value, theft rate, local weather, deductible |
| Optional add-ons | Rental, roadside, gap, accident forgiveness | Options chosen |
| Discounts | Reductions to the total | Bundling, safe driver, good student, telematics |
| Surcharges and fees | Increases for violations, installments, policy fees | Record, payment plan, state fees |
Liability: The Foundation
Bodily injury and property damage liability are required in nearly every state and protect you when you cause a crash. Their price depends heavily on your driving record, age and location, plus the limits you choose. Raising limits from state minimum to 100/300/100 increases this line, but usually by much less than people expect, because the extra coverage is used less often.
Collision and Comprehensive: The Physical Damage Portion
Together these are often the largest share of a full coverage premium. Collision is usually the more expensive of the two. Both depend on your car’s value and repair costs, and both are directly affected by your deductible. Raising a deductible from $500 to $1,000 typically lowers these lines noticeably. See how to choose a deductible and comprehensive vs. collision.
Example Breakdowns
The percentages below are illustrations of how premiums are commonly split. Your actual numbers will differ by state, insurer and profile.
Example 1: Experienced Driver, Paid-Off Older Car, Liability Only
| Component | Approximate share |
|---|---|
| Bodily injury liability | 55% |
| Property damage liability | 30% |
| Uninsured motorist | 10% |
| MedPay and fees | 5% |
With no collision or comprehensive, liability makes up almost the entire premium. This is the cheapest setup, but it pays nothing toward your own car.
Example 2: Family Driver, Newer Financed SUV, Full Coverage
| Component | Approximate share |
|---|---|
| Bodily injury liability | 28% |
| Property damage liability | 15% |
| Uninsured/underinsured motorist | 7% |
| Collision | 32% |
| Comprehensive | 13% |
| Rental and roadside | 5% |
Here, physical damage coverage accounts for nearly half the premium because the vehicle is newer and financed.
Example 3: Household Adding a 17-Year-Old Driver
Adding a teen typically raises every rated coverage, with the largest increases in liability and collision. The surcharge often appears on each coverage line rather than as a single item. Good student discounts, driver training and assigning the teen to the least expensive car can soften the impact.
Discounts, Surcharges and Fees
- Discounts may appear as separate negative lines or be built into each coverage price.
- Surcharges for at-fault accidents and violations usually last three to five years.
- Fees can include installment fees, policy fees and state assessments.
For what drives each of these, read factors that increase or decrease your premium and why car insurance goes up.
How to Read Your Declarations Page
- Find the coverage section listing each coverage, its limit and its premium.
- Check vehicle-level premiums if you insure more than one car.
- Look for discount lines and confirm each one applies to you.
- Find surcharges and their reasons.
- Note fees and the policy term.
- Compare totals across renewals to see which lines changed.
Using the Breakdown to Save Money
- Older, low-value car? Consider dropping collision and comprehensive if the premium is high relative to the car’s value.
- Healthy emergency fund? Raise your deductible.
- Multiple policies? Bundle home or renters with auto.
- Good driver? Try a telematics program.
- Do not cut liability or UM/UIM to save small amounts; they protect your finances.
Model these changes with our car insurance calculator, and see more ideas in how to lower your car insurance premium.
Frequently Asked Questions
What makes up a car insurance premium?
Separate charges for each coverage, such as liability, collision, comprehensive, uninsured motorist and medical coverage, plus discounts, surcharges and fees.
Which part of car insurance costs the most?
For full coverage on a newer car, collision is often the largest single line. For liability-only policies, bodily injury liability usually is.
Why did one coverage line go up but not others?
Insurers rate each coverage separately. Rising repair costs might raise collision, while a new local accident trend might raise liability.
Does raising my deductible lower my whole premium?
It lowers collision and comprehensive, not liability.
Where can I see my premium breakdown?
On your declarations page, usually available in your insurer’s app or online account.
Are discounts applied to every coverage?
Some are, while others apply only to certain coverages. Your declarations page shows how each one is applied.
Why is my premium different for two similar cars?
Vehicle value, repair costs, theft rates and assigned drivers differ, which changes collision and comprehensive pricing.
How long do surcharges stay on my premium?
Typically three to five years, depending on the insurer and state.
The Bottom Line
Your car insurance premium is a collection of individually priced coverages, adjusted by discounts, surcharges and fees. Liability is the foundation, collision and comprehensive often make up the biggest share on newer cars, and add-ons fill in the rest.
Read your declarations page line by line, focus savings on physical damage and discounts, and protect your liability and UM/UIM limits. For help reviewing your policy, contact the Matrix Insurance team.
