Car Insurance After an At-Fault Accident
After an at-fault accident, most drivers see their premium rise at renewal - a surcharge that commonly stays on the policy for about three years. How much it rises, and whether it rises at all, depends on your state's rules, your insurer, and whether you carry accident forgiveness. A not-at-fault accident usually should not raise your rate. Either way, comparing carriers after a claim is the most reliable way to limit the increase.
When you are found at fault for an accident, insurers treat you as a higher risk and your premium typically rises at the next renewal - an increase known as a surcharge. How big it is, and how long it lasts, is not arbitrary: it is shaped by your state's rules, your insurer's filed rating plan, and whether you have a feature like accident forgiveness.
It helps to separate two questions that drivers often blur together. The first is fault - whether the insurer holds you primarily responsible, which is what allows a surcharge at all. The second is magnitude and duration - how much your specific insurer raises the rate and for how many years it counts against you. Those are set independently: two drivers with the identical accident can see very different increases simply because their carriers file different surcharge schedules. That single fact is why shopping after an accident is the most powerful lever you have, and it runs through everything below.
What counts as "at fault"
Insurers surcharge the driver who was primarily responsible. California, for example, defines a driver as principally at fault when they were at least 51% of the cause of the accident, and only then may the accident be used to raise the rate. The exact threshold and process vary by state, but the principle is consistent: a minor or clearly not-at-fault accident should not be treated the same as one you primarily caused.
Key data
| Factor | Filed value | Source |
|---|---|---|
| California "principally at fault" threshold (fault share that allows a surcharge) | 51% | California Insurance Code 1861.02 / CCR 2632.13 (CA Dept. of Insurance) · Jun 2026 |
| California at-fault accident lookback for rating (period an at-fault accident affects the rate) | 3 years | California Insurance Code 1861.02 · Jun 2026 |
How long an at-fault accident affects your insurance
Most states use a lookback period for rating. In California, an at-fault accident affects your premium for about three years under the state's rating rules before it stops counting against you. Other states set their own windows, commonly three to five years. The surcharge is not permanent - as the accident ages past the lookback window, the increase comes off, which is also a good moment to re-shop your coverage.
Accident forgiveness
Some insurers offer accident forgiveness, which waives the surcharge for your first at-fault accident if you qualify (often after a stretch of clean driving). It is not available everywhere or on every policy, and the terms differ by carrier, so confirm whether you have it before an accident rather than after. If you do not, it can be worth comparing a carrier that offers it.
Not-at-fault accidents
If another driver was at fault, your rate generally should not go up, and several states restrict or prohibit surcharging a driver for a not-at-fault claim. Your insurer may still pursue the at-fault party's insurer to recover costs. If you are surcharged for an accident you did not cause, ask your insurer to explain the fault determination and how to dispute it.
How to limit the increase
Start by comparing carriers - because each files its own surcharge schedule, the increase for the same accident can differ a lot between insurers, and switching is often the biggest saving. Check whether accident forgiveness applies. Consider whether a higher deductible offsets the surcharge, and ask about defensive-driving or telematics programs that some states and carriers credit. Keep the rest of your record clean, since a single accident weighs less when it stands alone.
Timing matters too. The surcharge typically appears at your next renewal, not mid-term, which gives you a window to shop before it lands - and again each year as it ages toward the end of the lookback period. Getting quotes a few weeks before renewal, with the accident disclosed, is the cleanest way to see which insurer prices it most gently.
Should you file a claim at all?
For a small, single-vehicle scrape with no injuries, it is worth doing quick math before filing: if the repair is close to your deductible, the claim can cost you more in surcharge over the next few years than it pays out today. Filing always makes sense when there are injuries, another party, or significant damage - that is what insurance is for, and not reporting a serious accident can itself cause problems. But for minor at-fault damage you could comfortably pay out of pocket, paying it directly sometimes avoids a surcharge that would outlast the repair. This is a judgment call, not a rule, and it never applies when anyone is hurt.
Comprehensive and weather claims are treated differently
Not every claim is an at-fault accident. Comprehensive claims - theft, hail, fire, a fallen branch, hitting an animal - are not collisions and generally do not carry the same surcharge as an at-fault crash, because you did not cause them. A glass-only claim is usually the gentlest of all. That distinction matters when you decide whether to file: the rate impact of a comprehensive claim is typically much smaller than an at-fault collision, though frequent claims of any kind can still affect your standing with an insurer. If you are unsure how a specific claim will be classified, ask your carrier before you file.
The bottom line
An at-fault accident usually raises your rate at renewal and stays on your insurance for roughly three years, though the amount and the window depend on your state and carrier. It is temporary, a not-at-fault accident should not count the same way, and the most reliable way to limit the damage is to compare carriers - the one that surcharges your accident the least is rarely the one you already have.
Frequently asked questions
How much does an at-fault accident raise insurance?
It varies by state and carrier because each insurer files its own surcharge schedule. The increase for the same accident can differ a lot between companies, which is why comparing carriers after a claim is the biggest way to limit it.
How long does an accident stay on your insurance?
Most states use a lookback period for rating - about three years in California, and commonly three to five years elsewhere. After the window passes, the surcharge comes off.
What does "at fault" mean for insurance?
It means you were primarily responsible. California, for example, treats a driver as principally at fault at 51% or more of the cause, and only then may the accident be used to raise the rate.
Will my rate go up after a not-at-fault accident?
Generally it should not, and several states restrict surcharging for not-at-fault claims. If you are surcharged for an accident you didn't cause, ask your insurer to explain the fault determination and how to dispute it.
What is accident forgiveness?
A feature some insurers offer that waives the surcharge for your first at-fault accident if you qualify. It is not available everywhere or on every policy, so confirm whether you have it before you need it.
Should I switch insurers after an accident?
Often yes - because surcharge schedules are filed per carrier, another insurer may price your accident far more gently. Comparing quotes after a claim is the most reliable way to limit the increase.
Sources cited
- California Insurance Code 1861.02 / CCR 2632.13 (CA Dept. of Insurance) — captured Jun 2026
- California Insurance Code 1861.02 — captured Jun 2026
- Insurance Information Institute — captured Jun 2026
- National Association of Insurance Commissioners — captured Jun 2026
- Texas Department of Insurance - Auto insurance guide — captured Jun 2026
