Married drivers can get a discount says Montana

In a decision that resonates far beyond the Big Sky State, a Montana district court has upheld the right of insurance companies to utilize marital status as a key variable in determining premium rates.

The ruling, issued on March 10, 2026, marks a decisive chapter in a long-standing legal battle over the boundaries of actuarial science and constitutional protections.

Judge Mike Menahan of the Lewis and Clark County District Court ruled that Montana’s 2021 legislation, House Bill 379, does not infringe upon the state’s constitution. The bill effectively dismantled a 1985 "unisex" law that had made Montana the only state in the nation to prohibit insurers from considering sex or marital status across all insurance lines. For the industry, the decision is a validation of traditional risk assessment; for consumer advocates, it is a setback for those seeking to decouple socioeconomic identity from the cost of coverage.

The legal framework: rational basis vs. protected classes

The plaintiffs, represented by the Upper Seven Law Firm, argued that House Bill 379 violated the Equal Protection Clause by creating a disparate burden for single, divorced, or widowed individuals. They further alleged that the law constituted "special legislation" designed to benefit the insurance industry at the expense of citizens.

However, Judge Menahan’s 12-page ruling clarified that while the Montana Constitution provides heightened protection for race, sex, and religion, marital status is not a protected class. Therefore, the state needed only to demonstrate a "legitimate government interest" for the law to stand.

Montana State Auditor and Insurance Commissioner James Brown successfully argued that the state has a vested interest in maintaining a competitive, low-rate environment where premiums are tailored to risk.

“The idea that government should ban insurance companies from looking at sex and marital status... is the very definition of big government overreach,” Commissioner Brown stated following the verdict.

The actuarial justification

To insurance professionals, the ruling reaffirms the industry’s reliance on the "law of large numbers" and behavioral correlations. Actuarial experts testifying in the case cited decades of data suggesting that married couples represent a lower risk profile. While married drivers may log more total miles, they statistically engage in less reckless behavior compared to their single counterparts.

National data from the Consumer Federation of America (CFA) and other industry analysts highlight the following premium variances associated with marital status:

• Premium savings: On average, married individuals pay 8% to 15% less for auto insurance than single policyholders.
• Insurer specifics: The "single penalty" varies significantly by carrier. Farmers has been observed charging single drivers up to 22% more, while Progressive and Liberty Mutual apply surcharges of approximately 19% and 8%, respectively.
• Risk correlation: Research from New Zealand frequently cited by the industry suggests that "never-married" drivers have nearly double the risk of injury and are 1.5 times more likely to be involved in traffic accidents.

A fragmented national landscape

Montana’s move to re-embrace marital rating comes as other states move in the opposite direction, particularly regarding the "widow penalty." In 2025, both Texas and Rhode Island enacted laws prohibiting insurers from raising rates solely because a policyholder becomes widowed.

The following chart outlines the current regulatory environment across several key jurisdictions:

The broader demographic challenge

While the Montana case focused on marriage, the insurance industry faces mounting scrutiny over the cumulative impact of non-driving factors - such as credit scores, ZIP codes, and education - on minority communities.

Recent studies by the CFA illustrate the stark disparities that emerge when these factors are used as proxies for risk. For instance, safe drivers in predominantly African American ZIP codes often pay 70% more for state-mandated minimum coverage than similarly situated drivers in white neighborhoods ($1,060 vs. $622). In dense urban centers, this gap remains significant at 60%. Furthermore, even in upper-middle-class communities, the average premium in African American neighborhoods can be up to 194% higher than in comparable white ZIP codes.

As Montana moves back toward traditional actuarial methods, the industry remains at a crossroads: balancing the mathematical precision of individual risk assessment with the social demand for equitable pricing across all demographic groups.