How a car's age changes the price of each coverage

A premium does not shrink in step with a car's age, because it is built from several coverages that follow different rules. Collision and comprehensive, which pay to fix or replace your own car, fall as the car loses value, but more slowly than the value falls. Liability, medical and uninsured motorist charges mostly follow the driver, the limits and the location, so they stay about the same for years. Meanwhile a few things push an older car's price up: costlier repairs relative to its value, fewer safety systems, and sometimes theft appeal.

The numbers in this article's walk-through are invented to show the mechanics. They are not market prices, and your own quote depends on the insurer, the state and the car.

The premium is several prices added together

An auto policy is not one charge for "the car." Each coverage is priced on its own expected claims, and only some of those claims depend on the car's value.

The central idea in the table is the cap. The most an insurer pays on collision or comprehensive for a total loss is the car's actual cash value (what it was worth just before the loss) minus your deductible. As the car loses value, the largest possible claim shrinks, and with it the expected cost the insurer must collect. Liability has no such cap. A crash that injures someone costs the same whether your car is a 2026 model or a 2011 model, and the limit on your policy, not the value of the car, sets the ceiling.

One invented car, from new to fifteen years

Say you buy a mid-priced sedan new for $32,000 and keep the same driver, ZIP code, limits and $500 deductibles throughout. The figures below are hypothetical.

Between new and fifteen years, the car's value in this example falls 84%, from $32,000 to $5,000. Collision falls 60% and comprehensive 53%. The liability bundle does not move at all. The total premium falls by about a third, from $1,980 to $1,350.

Look at the premium per $1,000 of value, which shows the lag clearly:

The same $1,000 of value costs more than twice as much to insure at fifteen years as it did when the car was new. Nothing is wrong with the pricing; the following sections explain why.

Why collision and comprehensive fall, but not in step

The value cap works on the biggest claims only

Most claims are not total losses. They are repairs, and a repair does not get cheaper because the car is older. A smashed rear bumper, a cracked windshield or a stolen catalytic converter costs roughly the same to fix on a 15-year-old car as on a 3-year-old one, with some differences discussed below. The Highway Loss Data Institute (HLDI) found that nearly 50% of collision claims cost under $3,000 in its calendar-year 2021 data, covering model years 1981 to 2022, in its April 2023 bulletin. For a $5,000 car, a $2,500 repair is a major claim relative to its value; for a $32,000 car it is minor. Because those everyday repairs stay the same, the premium cannot drop as fast as the car's value.

The cap only trims the tail of the distribution, the total losses and the large repairs. Premiums fall because that tail is shorter, not because everything got cheaper.

Fixed costs sit under every claim

Estimating, labor, towing, rental days and claim handling do not shrink with the car's value. Neither does the deductible, which stays whatever you picked. On a cheap car, a larger share of every claim dollar is one of these fixed costs.

Repair versus total-loss decisions change with age

As a car's value drops, the point at which repair costs reach a share of value comes sooner, and the insurer starts totaling cars that a newer vehicle would have survived. That caps the claim at the car's value (good for the insurer's expected loss) but it also means more claims end as total losses. See how a car is declared a total loss: formulas and state thresholds for how states and insurers decide, and how used-car prices and parts costs feed into your premium for how used-car prices feed back into premiums.

Why liability, medical and uninsured motorist charges stay flat

Liability pays other people. The damage you do to someone's new SUV or the injuries you cause to its occupants have no connection to what your own car is worth. So the price of those coverages follows what the insurer expects to pay on your behalf: your driving record, age, location, annual mileage, chosen limits and, in some cases, the make and model's claims history.

The last item is where vehicle data does enter. The Insurance Services Office (ISO) introduced make-and-model rating symbols for liability and for no-fault and medical payments coverages in 2004. According to Insurance Journal's report, the program was built on analysis of personal auto loss experience and provided surcharges of up to 25% and discounts of up to 20% against the rates of nearly 300 makes and models. ISO also found that size alone was not a reliable predictor of liability losses. Companies could use the program as filed or adjust its factors. Insurers do not all use ISO's symbols, and the symbol follows the model, not the age as such, so a 15-year-old car of a model with a poor liability record can still carry a surcharge.

That explains why the liability bundle in the invented table is flat: the same driver in the same ZIP code with the same limits drives a car whose liability symbol did not change. In real life, moves in that line usually come from the driver, the area or the insurer's rate level, not from the car's birthday. The guide how car insurance rates are calculated covers those other factors. For context on how much liability is in the average bill, NAIC reported in its 2022/2023 auto insurance database report that the national combined average premium for liability, collision and comprehensive was $1,438 per issued vehicle in 2023, and that liability premiums grew 19% from 2019 to 2023.

What pushes an older car's price up

Several effects work against the cap, and they are why an old car is not as cheap to insure as its value suggests.

• Safety-system gaps. Newer cars carry forward collision warning, automatic braking and blind-spot warning. HLDI's pooled data associate front automatic braking with a 14.4% lower property damage liability claim frequency and a 23.6% lower bodily injury liability frequency, and blind-spot warning with 7.1% and 8.2% lower frequency (HLDI, April 2023). A car without them gives up that edge. The companion article do emergency braking and blind-spot alerts cut insurance claims? explains why this does not always show up as a discount.
• Parts and repair economics. Older cars can be repaired with used or aftermarket parts, which often lowers the bill, but a shortage of parts for a discontinued model can lengthen repairs and rental time. The blogs on recycled, reconditioned and certified parts in insurance repairs and OEM, aftermarket and used parts in your repair estimate describe the options.
• Theft appeal. Some older models are popular targets because of their parts value or lack of immobilizers. Comprehensive prices track a model's theft record, so an old car of a popular target can cost more to insure than a newer car with better anti-theft equipment. See The most stolen cars in America.
• Medical-cost inflation. Liability and injury charges move with rising medical and repair costs across the board, which can mask the benefit of an aging car's lower value.

How insurers use model-year and symbol data

For physical damage, insurers commonly rate with vehicle symbols. The New York Department of Financial Services explains on its page about physical damage premiums that these premiums are based on the estimated cost of future claims for damage to, or loss of, the vehicle, so higher-priced cars generally cost more to insure, and that repair cost, theft record and the damage a vehicle suffers in a crash also matter. It says ISO revised its rating symbol program in 2011 from 27 symbols to 75 for 2011 and later model vehicles, and introduced separate symbols for collision and comprehensive because the two coverages have different loss experience. Higher symbols mean greater claim cost, and the symbols are subject to periodic change.

Three consequences follow for an aging car:

1. The symbol belongs to a specific model and model year, so it reflects what that vintage costs to repair and how often it is stolen.
2. Collision and comprehensive symbols can diverge. A car may be cheap to repair but a theft target, or the reverse.
3. Symbols are updated. As claims accumulate on an old model, its symbol moves, so the same car can change price at renewal even though nothing about you has.

See vehicle symbol and how a redesign changes a car's insurance rating group and your premium.

Deductible choice gets more important as value falls

A deductible is a fixed dollar amount, and its weight grows as the car gets cheaper. On a $32,000 car, moving from $500 to $1,000 changes your share of a total loss by 1.6% of value. On a $5,000 car it is 10%.

Say the 15-year-old car in the table has a collision premium of $310 at a $500 deductible and $255 at a $1,000 deductible. The saving is $55 a year, and you take on an extra $500 on every claim. If you go nine years without a collision claim, you break even. On a claim in year two, you are behind. The cheaper the car, the less premium there is to reduce, so deductible credits shrink in dollar terms. The pricing logic is in how insurers price deductible credits: the logic behind the discount, and setting different collision and comprehensive deductibles on purpose covers choosing separate deductibles for each coverage. The deductible break-even calculator runs the break-even for your numbers.

The drop-coverage decision

At some age the cost of collision and comprehensive looks large against what the car is worth. The arithmetic is simple.

1. Find the car's value. Use the market value, since that is what the insurer would pay as actual cash value, not what you paid.
2. Add your annual collision and comprehensive premiums. Both appear on the declarations page.
3. Subtract your deductible from the car's value. That is the most a total loss would pay.
4. Compare. In the invented table, the 15-year-old car costs $450 a year ($310 plus $140) for coverage that would pay at most $4,500 after a $500 deductible. The premium is 10% of the most you could collect. Whether that is worth it depends on how much loss you can absorb, not just on odds.
5. Check for obligations. A lender or lessor will normally require both coverages until the loan is paid, and dropping them while financed can lead to force-placed coverage (see force-placed insurance: when your lender buys coverage for you).
6. Treat the two coverages separately. Comprehensive is usually the smaller premium and covers theft, hail and glass, which a cash cushion may not absorb as easily as a small fender-bender. The decision for each may differ.

The Should I drop full coverage? calculator and the blog on when to drop collision and comprehensive on an older car: the math carry this further. Dropping does not touch liability, which is the coverage that protects your assets.

What a replacement purchase does to the premium

Replacing a car resets the value line but not the driver line. Using the same invented numbers:

The value-driven lines rise with the new car's value. The liability bundle may shift a little in either direction because the new car has a different symbol and different safety equipment, but it is rarely the main change. Most buyers who finance a younger car also face lender requirements for collision and comprehensive, so the savings from dropping them disappear.

Before buying, ask the insurer to quote the exact vehicle by VIN, not the model in general. The guides to insuring a used car and vehicle safety ratings and insurance costs explain what to ask.

Common questions

Does a car's age itself raise or lower the premium?

Age matters mainly through value, repair costs and model history. There is no single "age factor" that behaves the same for every insurer, and the filed rating plans differ by company and state. Ask the insurer how it rates the model year.

Why didn't my premium drop when I paid off the car?

Paying off a loan does not lower the premium by itself. It removes the lender's requirement, so you may choose to drop collision and comprehensive, but only those lines can come off. In the example, liability is the largest piece on the old car, and it stays.

Is the oldest car always cheapest to insure?

No. Very old cars with low values have the smallest collision and comprehensive premiums, but liability, theft exposure and missing safety systems can make the total higher than for a newer, safer model. Compare the total, not one line.

Should I raise the deductible as the car ages?

Possibly, but the savings shrink as the premium falls. Divide the extra amount you would bear per claim by the annual saving; the result is the number of claim-free years it takes to break even.

Key takeaways

• A premium is a stack of coverage prices; only collision and comprehensive follow the car's value, and they fall more slowly than the value does.
• Liability, medical and uninsured motorist charges follow the driver, location and limits, so they stay roughly flat as the car ages.
• Older cars carry upward pressures: weaker safety equipment, costly repairs relative to value, parts availability and sometimes theft appeal.
• Vehicle symbols, set by model and model year and updated over time, are how insurers carry a car's loss history into the price.
• Decide on dropping collision and comprehensive with the arithmetic of value, deductible and premium, and check lender requirements first.