First-Party vs. Third-Party Insurance Claims

A first-party claim is made against your own insurance policy (like your own PIP, MedPay, or uninsured/underinsured motorist coverage); a third-party claim is made against the at-fault person's insurance policy. The two work very differently: your own insurer owes you a duty of good faith and fair dealing, while the at-fault party's insurer owes you almost nothing personally — its real client is the person who hurt you, and its financial incentive is to pay you as little as possible. Understanding which claim you're in, and that you can often use both at the same time, is one of the most useful things to learn early after an injury.

The two kinds of claims, in plain terms

Every claim you make after an accident falls into one of these two buckets:

• First-party claim — You're asking your own insurance company to pay benefits you already bought, under a policy you (or a household member, or your employer) pay premiums for. Examples: personal injury protection (PIP), medical payments coverage (MedPay), uninsured/underinsured motorist (UM/UIM) coverage, and sometimes your own health insurance or short-term disability policy.
• Third-party claim — You're asking the insurance company of the person or business who caused the accident to pay for the harm their policyholder caused you. You are the "third party" from that insurer's point of view — not their customer, just a claimant.

Both can arise from the same crash or incident. It's common to open a PIP or MedPay claim with your own insurer for immediate medical bills while a liability claim against the at-fault driver's insurer is still being investigated.

Why the duties owed to you are so different

This is the part people are usually surprised by.

Your own insurer (first-party)

Because you are the policyholder (or a covered person under the policy), your insurer generally owes you a duty of good faith and fair dealing. In most states, an insurer that unreasonably delays, lowballs, or denies a valid first-party claim can face a "bad faith" claim on top of the underlying benefits — sometimes with extra damages. This doesn't mean your own insurer will always pay quickly or generously, but there's a real legal relationship and real consequences if it treats you unfairly.

The at-fault party's insurer (third-party)

That company's contractual duty of good faith runs to its own policyholder — the person who hit you — not to you. Toward you, it is not required to look out for your interests, advise you, or offer you full value voluntarily. Many states regulate "unfair claims settlement practices" through their insurance codes, but what rights (if any) that gives a third-party claimant to sue directly varies widely by state, and in many states those rules are enforced by the state insurance department rather than by the claimant. In practice, adjusters are trained negotiators representing the insurer's financial interest. Anything you say to them, including recorded statements, can be used to minimize what you're owed.

When each type of claim applies

• PIP / MedPay (first-party): Typically pays your medical bills and sometimes lost wages quickly, regardless of who caused the accident. Some states require or default drivers into carrying PIP or MedPay; whether it's mandatory, optional, and how much coverage is available varies a great deal by state, so check your own policy declarations page and your state's rules.
• UM/UIM (first-party): Applies when the at-fault party has no insurance, or not enough insurance to cover your damages. You make this claim against your own auto policy even though someone else caused the crash — which is why it's still classified as first-party.
• Liability claim against the at-fault party's insurer (third-party): Applies when you're seeking compensation for the full range of your damages — medical bills, lost wages, pain and suffering, and more — based on the other party's fault. This is the claim that most often leads to a negotiated settlement or, if talks fail, a lawsuit.
• Your own health insurance: Also first-party in the broad sense — it can pay medical bills up front while liability is sorted out, though it may later assert a right of reimbursement (a "lien" or subrogation claim) against any third-party settlement you receive.

How the claims interact

Using first-party coverage first is often the fastest way to get bills paid and stop the financial bleeding, since it doesn't require proving fault. But it's rarely the end of the story:

• Insurers that pay first-party benefits (PIP, MedPay, health insurance) commonly have a right of subrogation or reimbursement — meaning if you later recover money from the at-fault party's insurer for the same medical expenses, your own insurer may be entitled to be repaid out of that recovery. The rules on how much they can recover, and whether they have to share in your attorney's fees and costs, vary by state and by policy language.
• A UIM claim usually requires you to first pursue (or at least identify and attempt to exhaust) the at-fault party's liability coverage; a UM claim generally comes into play when there's no liability coverage at all.
• Some states have "no-fault" auto insurance systems that limit or restrict when you can step outside your own PIP coverage and sue the at-fault driver directly. Whether your state is a no-fault, choice no-fault, or traditional fault-based (tort) state changes this analysis significantly, so this is something to confirm for your specific state rather than assume.

What to do

1. Get medical care and keep records. Document injuries and treatment regardless of which claim you'll eventually pursue.
2. Report the incident promptly to your own insurer to preserve first-party benefits (PIP/MedPay/UM) — many policies have short notice deadlines, so don't wait.
3. Identify the at-fault party's insurer through the police report, exchanged information, or your own insurer, and send notice of your claim, but be cautious about giving a recorded statement or signing broad medical authorizations before you understand what you're releasing.
4. Track every out-of-pocket cost and lost work day. Both first- and third-party claims will ask for this documentation.
5. Ask in writing which policies might apply — yours and theirs — including whether you have UM/UIM, MedPay, or umbrella coverage you may have forgotten about.
6. Watch every deadline. Insurance policies impose their own notice and proof-of-loss deadlines, and separately, your state's statute of limitations sets a hard cutoff for filing a lawsuit if a claim isn't resolved. These deadlines differ by state and by claim type — confirm your specific state's rule and your policy's timeframes rather than relying on a general number.
7. Consider talking to a personal injury attorney before signing a full release or accepting a settlement, especially if injuries are serious, fault is disputed, or a reimbursement claim from your own insurer is involved. Most personal injury attorneys work on a contingency fee, commonly around one-third of the recovery, so an initial consultation is typically free.

A few realistic expectations

• Most personal injury claims — first- and third-party alike — settle without a trial.
• The at-fault insurer's early settlement offer is a negotiating opening, not a final number; it's not obligated to offer full value up front.
• If your own state follows a comparative fault or contributory fault rule, how much you were partly to blame can reduce (or in some states, eliminate) what you can recover from the at-fault party — this is another area where the exact rule depends on your state.
• Settlement money for physical injuries is generally not taxable income under federal law (26 U.S.C. § 104(a)(2)), though this can get complicated for punitive damages or interest — a tax professional can advise on your specific situation.

This article is general information, not legal advice. Insurance and injury law vary by state and by policy — confirm deadlines, coverage limits, and your state's specific rules with a licensed attorney or your insurer.