How used-car prices and parts costs feed into your premium

Your premium for collision and comprehensive coverage is built from what insurers expect to pay to repair or replace cars like yours. When used-car prices jump, total-loss checks get bigger; when parts and labor cost more, repair bills get bigger. Neither shows up on your bill immediately, because rates are set from claims data that is a year or more old and then applied to policies that run for months.

You do not need to file a claim for this to reach you. The cost is spread across every policyholder in the rating pool. This article traces the chain from vehicle prices to filed rates, uses a worked example with invented numbers, lines up federal price data for 2020 through 2026 against insurer premium data, and ends with a method for checking whether the value your insurer would pay on your own car is realistic.

The chain, link by link

1. Vehicle prices and repair prices move. Used-car values change what a total loss costs. Parts, paint and labor change what a repair costs.
2. Claims are paid at the new prices. An insurer pays a total loss at actual cash value, the market value of a comparable vehicle just before the loss, and pays repairs at current shop prices.
3. Those payments enter the insurer's claims data. The average cost of a collision or comprehensive claim, its severity, rises.
4. Actuaries project the data forward and file new rates. The state reviews the filing, and the rates take effect for new business and then for renewals.
5. Your renewal premium reflects the filing. Everyone with similar coverage in the same rating cells sees the change, whether or not they had a claim.

Steps 1 and 2 happen within weeks. Steps 3 to 5 take many months or years. Our guide on why rates keep rising covers the other forces, and our article on frequency versus severity shows why price increases per claim matter even when claims become less common.

Link one: total-loss payouts follow used-vehicle values

When repairs would cost too much compared with the car's value, the insurer declares a total loss and pays the vehicle's actual cash value, less your deductible. That value is not what you paid or what you owe on the loan. It is an estimate of what it would cost to buy a comparable car today.

The NAIC's Unfair Property/Casualty Claims Settlement Practices Model Regulation shows the method many state rules are based on. It is a model, which each state may adopt, change or skip, so your state's rule may differ. Under the model, the insurer can offer a comparable replacement car or make a cash settlement based on the actual cost of buying a comparable automobile, including taxes, license fees and other transfer fees. That cost may be derived from two or more comparable cars in the local market area that are available or were available in the last 90 days, from comparable cars in nearby areas if local ones are not available, from dealer quotations, or from a database that meets listed criteria. The database must give primary consideration to the local market area, produce values for at least 85% of makes and models of the last 15 model years, and use current data from the area where the car was principally garaged.

The consequence for pricing is direct. If comparable used cars cost 40% more than they did two years ago, total-loss settlements are based on data that is 40% higher, and a share of every collision and comprehensive claim budget goes up with it. Cars that are stolen and not recovered, or burned, are also settled at actual cash value, so comprehensive follows the same prices.

A worked example with invented numbers

Suppose an insurer paid 100 collision claims on a type of car. In the "before" year, 80 claims were repairs averaging $5,000 and 20 were total losses with an actual cash value of $15,000 each. When the insurer sells a totaled car for salvage it recovers part of the payout, say $3,000, so each total costs it $12,000 net.

Average claim severity rose 21.9% from two changes, a 40% jump in vehicle values and a 10% increase in repair prices. Total losses were 20% of the claims but 37.5% of the cost before and about 43.6% after. A small share of claims carries a large share of the cost, and that share is tied to the used-car market.

Link two: parts, paint and labor

Repairs follow a different set of prices. The Insurance Research Council reported in July 2023 that during 2020-2022 claim severity "skyrocketed," especially for vehicle damage claims, because of enormous inflationary pressures on replacement parts and auto body repair labor costs. Its release is available from the IRC.

Federal data gives the broad picture. The Bureau of Labor Statistics' consumer price index for motor vehicle maintenance and repair (U.S. city average, not seasonally adjusted, retrieved through the BLS public data API as series CUUR0000SETD) moved from 309.9 in December 2020 to 468.5 in September 2026. That is an increase of about 51%, and as the table below shows, the index rose in every year-end from 2021 to 2025.

Industry data points the same way on the repair side. Repairer Driven News, summarizing a December 2025 report from CCC, a claims-technology company, said the average total cost of repair grew from $4,700 to $4,768 through the third quarter of 2025 and that labor rates were up 3% through September. The same report put the average adjusted vehicle valuation at $13,700 through October 2025 and said it remained below the mid-2022 peaks, according to Repairer Driven News. Our articles on why repairs cost more and labor rates and paint costs explain the repair side in more detail.

A dated example: the 2021-2022 used-car surge

The surge in used-car prices after 2020 is the clearest recent case of the chain at work. The BLS consumer price index for used cars and trucks (not seasonally adjusted, series CUUR0000SETA02) was 150.9 in December 2020. It reached 207.2 by December 2021, peaked at 213.7 in July 2022, and was 184.4 in September 2026. In other words, used-car prices rose about 42% from December 2020 to the July 2022 peak, then fell about 14% from the peak, and remain about 22% above their December 2020 level.

Set that against the repair index and the NAIC's countrywide collision average premium:

The premium figures come from the NAIC's 2022/2023 Auto Insurance Database Report. Premium changes also reflect many other things, including changes in coverage choices, so read the table as a pattern, not as proof of a single cause.

The pattern is the point. Used-car prices rose most in 2021, and that year's average collision premium rose less than 2%. The largest premium increase came in 2023, after the used-car index had already started to fall. Milliman's October 2022 analysis of personal auto filings found severity up 11.3% from year-end 2020 to year-end 2021 and an average filed rate change of about +7.0% across more than 2,000 approved filings effective in 2022. That fits the idea that the higher claim costs of 2021 were feeding the filings of 2022.

Why the effect arrives months or years later

Three delays stack up.

• Data delay. A rate indication is built from past claims. The Casualty Actuarial Society's textbook Basic Ratemaking works through an example in which losses from calendar year 2011 are trended to policies written in 2013, a trend period of 2.5 years for annual policies. The example is illustrative, but it shows why a price shock in one year is not fully in rates until the next year or the one after.
• Filing and approval delay. Insurers must file the change, regulators may take weeks or months, and the effective date for renewals is usually later than for new business. See our timeline of filing to your bill.
• Renewal delay. Your policy keeps its rate until its term ends. With a six-month or 12-month term, the new rate can reach you up to a year after it was approved.

That is why a driver who had no claims and did not change anything can see an increase in 2023 for a vehicle-price spike in 2021.

Why a price drop does not reverse the increase quickly

Used-car prices fell about 12% between July 2022 and December 2022, yet rates did not fall in step. Several reasons are consistent with the data above.

1. The repair side kept rising. The repair index rose every year even as used values eased, so average severity did not decline in step.
2. Multi-year data. An indication uses several years of experience. The high-priced years stay in the average for some time.
3. Rates may only be catching up. If earlier years' claims showed rates were too low, a filing can do no more than bring them to an adequate level.
4. More claims can cross the total-loss line. If a car's value falls while repair costs stay high, the same crash is more likely to be a total, which does not lower the cost of that claim as much as the car's price change suggests. CCC data, as reported by Repairer Driven News in December 2025, called 2024 a record year for the share of claims flagged as total loss.
5. Competition and regulation shape the pace. Insurers decide how fast to cut, and states review both increases and decreases.

How to check whether your insured value is realistic

You do not get to set the actual cash value in a standard policy, but you can see whether the insurer's number would be fair if you needed it. The cost of insurance rises with vehicle value, so the check also tells you whether you are paying for coverage that no longer matches the car.

1. Find three comparable listings. Look for the same year, make, model, trim, similar mileage and options, within your local market, as the NAIC model regulation prescribes for settlements.
2. Account for options and condition. Valuation reports adjust for mileage, options and condition. See our article on reading a total loss valuation report.
3. Add taxes and fees. The model regulation requires cash settlements to include applicable taxes, license fees and transfer fees. Check your state's rule, because the details vary.
4. Run the numbers with the total loss payout estimator and compare to your policy's deductible.
5. Decide what the gap means. If the car's value has fallen close to the cost of the deductible plus a year of collision premium, see our article on when to drop collision and comprehensive.

If you own a rare or heavily modified vehicle, an ordinary policy's actual cash value may fall short. Ask the agent about agreed-value or stated-value options.

Questions to ask your insurer

• What source does your company use to value a total loss in my state, and does it weight local sales?
• Does my policy pay taxes and fees on a total loss? Which ones?
• How is condition judged, and who decides?
• If I disagree with the valuation, what is the appeal or appraisal process?

Common questions

I never filed a claim. Why would a used-car price change my premium?

Because rates are based on the cost of all claims in your rating group. If total-loss payments and repair bills rise, the average cost per claim rises and every policyholder in that group bears part of it.

If used-car prices fall, will my premium fall?

Eventually it may, but not quickly. Rates reflect multi-year data and the repair side, and an insurer's decision to file a decrease depends on its own results and competition.

Does the price of my own car change my rate?

Yes, for collision and comprehensive. The vehicle's rating group, which reflects its value and its repair and theft history, enters your rate directly. Our article on rating groups and redesigns covers that.

Does this apply to liability coverage?

Property damage liability follows repair and replacement costs of other people's vehicles, so it moves with the same prices. Bodily injury follows medical and legal costs.

Key takeaways

• Collision and comprehensive premiums are built from repair and replacement costs, so used-car values and parts and labor prices feed in directly.
• Total losses are a small share of claims but a large share of claim dollars, and they are priced off used-vehicle values.
• The 2021-2022 used-car spike reached average collision premiums mostly in 2022 and 2023, a lag of one to two years or more.
• A drop in used-car prices does not reverse increases quickly, because repair costs kept rising and rates rely on several years of data.
• You can test your own car's value with three comparable listings, taxes and fees, and your insurer's valuation report.