The MBR Auto Insurance Burden Index (MBR-AIBI) measures how heavily car insurance actually weighs on each state’s households. Raw premium rankings mislead: a $1,700 premium is a rounding error for some budgets and a hardship for others. The index normalizes average premiums against each state’s median household income, with the national baseline set at 100; higher scores mean a heavier burden.
Louisiana currently carries the nation’s heaviest burden at 165.9, while New Hampshire is lightest at 64.7. 10 states score in the high or severe bands. Computed by MonitorBankRates from NAIC average premium data and U.S. Census Bureau income data.
Updated with each annual NAIC and Census data release. Rankings as of August 29, 2026.
Every state coloured by its car insurance burden band. Hover for the score and premium; click through to that state’s car insurance page.
National baseline = 100. Hover any state for its score; click to open that state's page.
Each state links to its full car insurance guide with average premiums, minimum coverage requirements, and ways to lower your rate. Bands: under 85 low, 85 to 115 moderate, 115 to 140 high, 140 and up severe.
What the index measures: The MBR-AIBI answers a simple question: relative to what people earn, where does car insurance strain budgets the most? A score of 100 represents the national baseline. A state scoring 140 carries a burden roughly 40% heavier than the typical U.S. driver; a state at 75 carries one roughly 25% lighter.
The two components: Each state’s score combines its ratio to the national figure on two measures: average annual auto insurance premium as a share of median household income (60% weight), which captures affordability, and the average premium relative to the national average (40% weight), which captures the absolute price level of the state’s insurance market.
Data sources: Average premiums (liability, collision, and comprehensive combined) come from the NAIC 2022 Auto Insurance Database Report average premium supplement, the standard public source for state-level auto insurance costs. Median household income comes from the U.S. Census Bureau American Community Survey (table B19013). No advertiser or carrier data is used.
Update cadence: Scores recompute with each annual NAIC premium supplement and Census income release. Because the index is a ratio against the national baseline, it is comparable across releases even as dollar premiums rise.
How to use it: Each state’s car insurance guide shows its score in context, alongside average premiums, that state’s minimum coverage requirements, and what drives local pricing. Start from the table above, or from the car insurance marketplace.