Fault system (no-fault vs at-fault) in New Mexico

If another driver hit you in New Mexico, the state's fault rules decide who pays and how much. New Mexico runs on an at-fault system, so the driver who caused the crash, along with that driver's insurance, is responsible for your medical bills, lost income, vehicle damage, and pain. You do not turn first to your own policy the way drivers do in no-fault states.

That one fact shapes everything that follows: how you file, which deadlines apply, and how much your own share of blame can cut into your recovery. Here is how it works under New Mexico law.

New Mexico is an at-fault state, not a no-fault state

New Mexico is a traditional tort, or at-fault, state. There is no personal injury protection (PIP) requirement and no PIP product mandated by statute, because the state never adopted a no-fault scheme.¹ In a no-fault state, each driver's own insurer pays their medical costs regardless of who caused the crash, and lawsuits are limited unless an injury crosses a set threshold. None of that applies here. In New Mexico you pursue the at-fault driver and their liability insurer directly, and you can sue for your full damages without clearing any injury threshold.

Every driver must carry liability insurance. The minimum limits are 25/50/10: $25,000 for bodily injury to or death of one person, $50,000 for bodily injury to or death of two or more people, and $10,000 for property damage in any one accident.¹² Those are minimums, and they run low. A serious crash can pass $25,000 in medical bills alone, which is why the at-fault driver's minimum policy often is not enough to cover a bad injury.

After an at-fault crash you generally have three ways to recover: a claim against the at-fault driver's liability insurer, a claim under your own UM/UIM coverage if that driver was uninsured or underinsured, and a lawsuit if the insurance route stalls or the policy is too small. All three turn on the same fault question, who caused the crash and by how much.

How comparative fault changes what you recover

New Mexico follows pure comparative negligence, adopted by the state Supreme Court in Scott v. Rizzo in 1981.³ Under that rule, your damages are reduced by your own percentage of fault, but they are never wiped out completely. If a jury finds you 20 percent responsible and your damages total $100,000, you recover $80,000.

The word pure matters here. Many states use a modified rule that bars recovery once you reach 50 or 51 percent fault. New Mexico has no such cutoff. A driver found 99 percent at fault can still recover 1 percent of their damages.³ In practice, that gives the other side's insurer a strong incentive to pin as much blame on you as possible, because every percentage point they shift lowers what they owe. Locking down the evidence early, the crash report, photos, and witness names, is how you push back on an inflated fault argument.

The coverage that protects you when the other driver has too little

Because minimum policies are small, uninsured and underinsured motorist coverage (UM/UIM) is often what actually pays a serious claim. New Mexico requires every auto insurer to offer UM/UIM at limits equal to your liability coverage.⁴ You are not required to buy it. The named insured can reject UM/UIM, but the rejection has to be in writing and made part of the policy to count.⁴⁵ When an insurer cannot produce a valid written rejection, New Mexico courts have read the coverage back into the policy at the full liability limits.⁵

Lawmakers tried to tighten this in 2025. House Bill 97 would have folded underinsured coverage into every policy and removed the language that lets insurers skip it at renewal, but the bill stalled in the House Transportation and Public Works Committee and never became law.⁶⁷ So the rule for 2026 is unchanged: UM/UIM must be offered, and you can still waive it in writing.

Medical payments coverage (MedPay) works the same way. It is optional, offered by insurers rather than required by statute, and there is no fixed deadline to elect it.¹ MedPay is not PIP, and adding it does not convert your claim into a no-fault claim.

The deadlines that can end your claim

New Mexico gives you three years from the date of the crash to file a personal injury lawsuit.⁸ Claims for vehicle damage and other property losses get four years.⁹ Miss the deadline and the court will almost always dismiss the case, no matter how clearly the other driver was at fault. The clock generally starts the day of the crash.

These legal deadlines are separate from your insurance claim. Report the crash to the insurers within days, but treat the statute of limitations as the hard cutoff for going to court.

When a government vehicle or employee is at fault

If the at-fault driver was a government employee on the job, say a city truck, a state vehicle, or a school district van, a different set of rules kicks in. There is no cap on the compensatory damages you can recover from an ordinary private driver, but claims against a governmental entity fall under the Tort Claims Act, which caps recovery. The limits are $300,000 for past and future medical expenses, $400,000 for all other damages to one person, and $100,000 for property damage, with a total ceiling of $750,000 per occurrence for everything other than medical expenses.¹⁰ The Act also bars punitive damages against the government outright.¹⁰ Punitive damages can still be available against a private at-fault driver, but only when the conduct was reckless, willful, or malicious, not for ordinary carelessness.

Claims against a public entity also carry strict notice requirements and short timelines, so they are worth raising with a lawyer early.

Putting it together after a crash

The at-fault system rewards documentation. Start with the New Mexico crash report, which the state Department of Public Safety maintains.¹¹ Photograph the damage before repairs and keep every medical and repair record, because your recovery tracks what you can prove. If your car is worth less at resale even after a proper repair, that diminished value is a separate claim in New Mexico.

When the other driver's minimum policy will not cover your injuries, or the insurer starts assigning you blame to shrink the payout, that is the point to talk to a lawyer.

This article is general information, not legal advice.

Sources

1. New Mexico Motor Vehicle Division, What Automobile Insurance Am I Required to Have in New Mexico. https://www.mvd.newmexico.gov/what-automobile-insurance-am-i-required-to-have-in-new-mexico/

2. NMSA 1978 Section 66-5-215, proof of financial responsibility (minimum liability limits). https://law.justia.com/codes/new-mexico/chapter-66/article-5/part-3/section-66-5-215/

3. Scott v. Rizzo, 96 N.M. 682, 634 P.2d 1234 (1981). https://www.courtlistener.com/opinion/1430183/scott-v-rizzo/

4. NMSA 1978 Section 66-5-301, insurance against uninsured and unknown motorists; rejection of coverage by the insured. https://law.justia.com/codes/new-mexico/chapter-66/article-5/part-4/section-66-5-301/

5. N.M. Admin. Code Section 13.12.3.9, rejection of uninsured motorist coverage. https://www.law.cornell.edu/regulations/new-mexico/N-M-Admin-Code-SS-13.12.3.9

6. New Mexico Legislature, House Bill 97 (2025 Regular Session). https://www.nmlegis.gov/Sessions/25%20Regular/bills/house/HB0097.HTML

7. LegiScan, New Mexico HB97 (2025) bill history. https://legiscan.com/NM/bill/HB97/2025

8. NMSA 1978 Section 37-1-8, actions for injuries to the person (three years). https://law.justia.com/codes/new-mexico/chapter-37/article-1/section-37-1-8/

9. NMSA 1978 Section 37-1-4, injuries to property and unspecified actions (four years). https://law.justia.com/codes/new-mexico/chapter-37/article-1/section-37-1-4/

10. NMSA 1978 Section 41-4-19, Tort Claims Act maximum liability. https://law.justia.com/codes/new-mexico/chapter-41/article-4/section-41-4-19/

11. New Mexico Department of Public Safety, Law Enforcement Records Bureau. https://www.dps.nm.gov/law-enforcement-records-bureau/