By Serdar Arslan, editor · Last reviewed · 8 min read · How we research
Two people with identical injuries, one rear-ended in Ohio and one in Michigan, will send their medical bills to different insurance companies. The question of whose insurance pays for my injuries? depends mostly on the state where the crash happened. US states use one of two basic systems, at-fault (also called tort) or no-fault, and a few let drivers choose. Which one applies decides where you file, what gets covered, and whether you can sue at all.
The short version
- At-fault states: The driver who caused the crash (and their liability insurer) pays for the other people's injuries and damage. You can file a claim against them or sue them.
- No-fault states: Your own insurance pays your medical bills and some lost income up to a set limit, no matter who caused the crash. You can step outside that system and sue the at-fault driver only if your injury meets a legal threshold.
- Choice no-fault states: Drivers pick, when buying a policy, between a no-fault option (with lawsuit limits) and a traditional option (keeping more right to sue).
How at-fault (tort) states work
Most states use the at-fault system. After a crash:
- Someone has to figure out who was at fault, usually based on the police report, statements, photos, and state traffic laws.
- The injured person files a third-party claim against the at-fault driver's liability insurance.
- If the insurer won't pay a fair amount, the injured person can file a lawsuit within the statute of limitations.
You can also use your own coverage in an at-fault state. Depending on your policy, that might include collision coverage for your car, medical payments coverage, or uninsured motorist coverage. Your insurer may later try to recover what it paid from the at-fault driver's insurer (this is called subrogation).
The trade-off cuts both ways. You can claim the full range of damages, pain and suffering included, but payment can take months while fault gets argued over, and your recovery shrinks if you share the blame. See comparative fault explained.
How no-fault states work
In a no-fault state, your own policy includes personal injury protection (PIP). According to the NAIC's consumer guide, in no-fault states your insurer pays for injuries to you and your passengers regardless of who caused the crash, and PIP can also cover lost wages and funeral costs.
What that looks like day to day:
- Fast payment. You file with your own insurer, so you don't have to wait for a fault decision.
- Coverage limits. PIP only pays up to the limit on your policy. Required minimums vary by state.
- Limits on lawsuits. In exchange for quick payment, no-fault laws restrict your right to sue the at-fault driver for pain and suffering unless your injury is serious enough.
- Vehicle damage is separate. No-fault generally applies to injuries, not cars. The NAIC notes that vehicle damage is still claimed through the at-fault driver's insurer.
Lawsuit thresholds
The Insurance Information Institute (Triple-I) describes two kinds of thresholds that decide when you can sue in a no-fault state:
| Threshold type | How it works |
|---|---|
| Verbal threshold | You can sue only if your injury fits a description in the statute, such as death, significant disfigurement, or other serious injuries the law lists. |
| Monetary threshold | You can sue once your medical expenses reach a set dollar amount. |
If your injury doesn't meet the threshold, you are generally limited to your PIP benefits for medical bills and lost income. If it does, you can pursue a claim against the at-fault driver for damages beyond PIP, including pain and suffering.
Which states are no-fault?
According to the Triple-I, the following states have true no-fault laws (Puerto Rico does too):
| Threshold | States |
|---|---|
| Verbal | Florida, Michigan, New Jersey, New York, Pennsylvania |
| Monetary | Hawaii, Kansas, Kentucky, Massachusetts, Minnesota, North Dakota, Utah |
Three of these, New Jersey, Pennsylvania, and Kentucky, are choice no-fault states. Drivers there can choose a policy that keeps more of the right to sue. In Pennsylvania, this is commonly known as choosing "full tort" versus "limited tort."
States sometimes change their systems. The Triple-I notes, for example, that several states repealed no-fault laws over the years, and that Florida's law briefly lapsed in 2007 before being reenacted. Before relying on any list, check your state on our state law pages or with your state insurance department.
Some at-fault states also require or offer PIP or medical payments coverage. Having PIP in your policy doesn't automatically mean your state restricts lawsuits.
Comparing the systems
| Question | At-fault state | No-fault state |
|---|---|---|
| Who pays my medical bills first? | Usually the at-fault driver's insurer (or your own med-pay/health insurance while you wait) | Your own PIP coverage |
| Do I have to prove fault to get medical bills paid? | Yes, for a claim against the other driver | No, for PIP benefits |
| Can I claim pain and suffering? | Yes | Only if you meet the threshold |
| Who pays for my car? | At-fault driver's insurer, or your collision coverage | Usually the same as at-fault states |
| Can my recovery be reduced for my own fault? | Yes, under comparative fault rules | PIP generally isn't; a lawsuit may be |
Practical tips for each system
If you're in a no-fault state
- Report the crash and apply for PIP quickly. Some no-fault states have strict time limits. Florida, for example, generally requires initial medical treatment within 14 days to qualify for PIP medical benefits.
- Keep every bill and note. These records show whether you meet a monetary threshold or a serious-injury definition.
- Know your PIP limit. If your costs may exceed it, ask how health insurance, med-pay, or a claim against the other driver could fill the gap. See medical bills and liens after an accident.
If you're in an at-fault state
- Gather evidence of fault early. Photos, witness information, and the police report help establish who caused the crash. See our evidence checklist.
- Check your own coverages. Med-pay, collision, and uninsured motorist coverage can help while the other insurer investigates.
- Be cautious with the other insurer. See dealing with insurance adjusters.
In either system
- If the other driver has no insurance or too little, your uninsured/underinsured motorist coverage may help. See uninsured and underinsured motorist claims.
- If you disagree with how your claim is handled, the NAIC suggests first asking your insurer for a written explanation and then contacting your state insurance department's consumer services staff.
What if the crash happened in another state?
When drivers from different states collide, figuring out which state's rules apply can get complicated. Your own policy may adjust coverage to meet the minimums of the state where the crash happened. If you were hurt out of state, ask your insurer how your coverage applies, and consider talking with a licensed attorney in the state where the crash occurred.
Where to file first
In an at-fault state, your claim runs against the driver who caused the crash, and it can include pain and suffering. In a no-fault state, your own PIP pays medical bills and some lost income regardless of fault, and you can sue the other driver only if your injury clears a verbal or monetary threshold. New Jersey, Pennsylvania, and Kentucky let drivers pick between no-fault and traditional options. Car damage, on the other hand, generally follows fault everywhere. States do revise these laws, so confirm your state's current system before you file anything.