Which States Are Most and Least Expensive for Car Insurance (2026 Cost Tiers)

How we banded the states

State-by-state monthly averages widely cited on the web are quote-funnel averages from comparison aggregators, not direct measurements of every policy in the state. They drift between refreshes, and the ordering between adjacent states (say, the 18th-cheapest vs the 22nd-cheapest) is unstable.

What is stable is the broad tier a state sits in. Vermont, Maine, Idaho, and New Hampshire have been at or near the bottom of state-cost rankings for several years; Michigan, Florida, Louisiana, and New York have been at or near the top[1][2]. The tiers below group states whose rate-driving factors (medical-cost regime, litigation climate, uninsured-motorist rate, weather, density) put them in similar bands.

Each tier is presented with a cited range expressed as a percentage of the national monthly full-coverage reference range ($195-$225 in late 2025 / early 2026). Apply your tier multiplier to that reference to get a rough state-level band, then refine with the factors on What drives your premium.

The four cost tiers

Tier assignment is approximate and based on aggregated public rankings (III state profiles, NAIC Auto Insurance Database Report). A state can shift a tier between annual refreshes; the band remains the more reliable signal than the precise ranking within a tier.

Why the highest-cost tier is so expensive

Tier 4 states share a small set of structural drivers:

• Medical-cost severity combined with PIP requirement. Michigan, New York, Florida, and New Jersey all have personal injury protection regimes paired with high medical-cost inflation. Insurers price the PIP exposure into every policy.
• Litigation climate. Louisiana, Florida, and Georgia have historically had higher attorney-involvement rates on bodily injury claims, which pushes settlement size and premium upward.
• Uninsured-motorist rate. Florida, Mississippi, and several Tier 4 states have higher uninsured-motorist percentages, which transfers loss cost onto insured drivers via UM/UIM coverage.
• Catastrophe exposure. Florida (hurricane), Louisiana (hurricane and flood), and Colorado (hail) carry comprehensive-coverage cost above the national average.
• Density and theft. DC, New Jersey, and parts of New York combine high traffic density with elevated theft rates relative to lower-density Tier 1 states.

Why the lowest-cost tier is so cheap

Tier 1 states share the inverse pattern: lower density, fewer vehicles per square mile, lower medical-cost inflation, lower attorney-involvement rate on claims, and modest catastrophe exposure. Vermont, Maine, Idaho, and New Hampshire are consistent Tier 1 residents because every structural driver pushes the same direction.

A few Tier 1 states are surprising at first glance. Hawaii rates low partly because it prohibits credit-based insurance scoring and has a relatively contained medical-cost regime. North Dakota and South Dakota rate low because of low density and a stable claim experience.

No-fault versus tort states

The legal regime affects how losses are paid out and therefore how insurers price them. The states with no-fault personal-injury-protection regimes (state-published list per III) are:

The remaining 38 states and DC operate under a tort regime. A few states (Kentucky, New Jersey, Pennsylvania) operate a choice no-fault regime where drivers can opt into limited tort. The legal regime is published per state by the III and confirmed on each state DOI consumer page.

State minimum liability requirements

Every state mandates a minimum liability level for vehicles registered to drive on public roads. The minimum is published by each state DOI and aggregated by the III compulsory-limits page[4]. Common patterns:

• Most states require split limits expressed as bodily-injury-per-person / bodily-injury-per-accident / property-damage. Common minimums are 25/50/25, 25/50/10, or 30/60/25.
• A few states (e.g. Florida) allow a property-damage-plus-PIP combination instead of bodily injury liability at the minimum.
• New Hampshire is the one state that does not require auto liability insurance for most drivers, though financial-responsibility rules apply after an accident.

State minimums are rarely sufficient for real-world claims. A single moderate at-fault injury accident can exhaust a 25/50 limit, leaving the at-fault driver personally liable for the balance. The standard advice across consumer-finance sources is to carry at least 100/300/100 or higher; an umbrella policy is sensible for households with assets to protect.

Outliers and what does not fit the pattern

A few states sit in a different tier than intuition suggests. Massachusetts is a Tier 2 state despite high density, partly because it bans credit-based insurance scoring and has a tightly regulated rate-filing system. Hawaii is a Tier 1 state despite isolation, partly because its medical-cost regime is more contained than coastal mainland equivalents. California is a Tier 3 state despite high population, partly because Proposition 103 constrains rate filings.

For a deeper look at why two states with similar populations can land in different tiers, the III state profiles publish loss-frequency and severity figures alongside the headline averages.