California Insurance Commissioner Ricardo Lara proposed regulations on September 16 to delete marital status from the 15 optional auto rating factors, ending a factor the Department itself approved in 1996 under 10 CCR 2632.5(d)(9) (California Department of Insurance, September 16, 2026). Nine weeks earlier the First District Court of Appeal had upheld that factor in Ison v. Lara, with the plaintiff conceding it bears a substantial relationship to loss.

What the proposal changes is who pays for that relationship. Its published method for removing a factor, written for gender in 2019, deletes the factor and its relativities, forbids any change to other relativities, and requires the revised class plan to be revenue neutral on the insurer's current distribution of vehicles (CDI, Guide to Removing Gender as a Rating Factor, 2019). Married drivers absorb the difference through the base rate.

Key Takeaways

  • $56 to $100 a policy is what the Ison plaintiffs alleged unmarried Californians pay above married drivers, and a Consumer Federation of America test in April 2025 found quotes up to $108 higher for six months at four of five carriers (Ison v. Lara, A170267, July 16, 2026; Los Angeles Times, September 16, 2026).
  • 15 optional factors sit in 2632.5(d), from vehicle type to persistency to claims frequency, and marital status appears twice: as factor (d)(9) on its own and inside (d)(12) secondary driver characteristics (10 CCR 2632.5).
  • +11 percent is the bodily injury premium change the Department's own modelling produced for married drivers under 25 when a large California insurer dropped gender, marital status and age together, against minus 9 percent for single males under 25 (Hunstad, Journal of Insurance Regulation, 1995).
  • 0.25 is the maximum by which a corrected factor's weight may exceed the next factor's in the sequential analysis, the ordering rule every revised class plan must re-satisfy once a factor leaves a combination (10 CCR 2632.8).
  • 31 pages of dissent in Ison recorded the Commissioner's litigating position that price differences by marital status are lawful "if insurers have actuarial support for their rate differentials," the premise the September proposal now abandons (Ison v. Lara, Tucher, J., dissenting).

A Factor Defended in July and Deleted in September

Ison and other unmarried policyholders petitioned in March 2022 to compel the Commissioner to rescind 2632.5(d)(9), arguing it conflicted with the Unruh Civil Rights Act, which added marital status as a protected class in 2005, and with the 2008 amendment to the Rosenthal auto nondiscrimination law. Farmers Insurance Exchange and Mid-Century intervened because they were defendants in a putative class action over the same factor. A trial court denied the petition and the appellate majority affirmed on July 16, holding the 1996 regulation could be harmonised with both statutes (Ison v. Lara, July 16, 2026).

Nobody contested the loss record. In the majority's words, Ison "does not dispute that marital status may justify a higher rate," and the class plan process it described requires insurers to support each optional factor's relativities with historical loss data that the Department reviews. Justice Tucher's 31-page dissent objected to the Commissioner's legal theory: the Unruh Act, in her reading, has "no textual hook" for permitting discrimination on an enumerated ground because it is actuarially justified.

September's release retreats from that theory on policy grounds. "The price of your auto insurance should be based on how you drive, not whether you're married," Lara said, adding that "when a rating factor no longer belongs in a modern insurance system, we have an obligation to act" (CDI, September 16, 2026).

Reporting by the Los Angeles Times adds two facts the release omits. In court the Department had defended the factor because unmarried drivers have more accidents; in a recent filing it suggested the correlation may run through income and education. Insurers may file no new plans using the factor after October 25, 2026 and must file plans without it by July 1, 2027 (Los Angeles Times, September 16, 2026).

Revenue Neutral Means the Base Rate Absorbs the Factor

Once before, in 2019, the Department removed a factor and wrote the procedure down. Insurers using gender as a stand-alone factor were told the factor "and its associated relativities are simply removed; the insurer may not change the relativities of any other rating factor," and that "the factor weights for all remaining factors will be identical" to the approved plan. Every filing had to be revenue neutral on the current vehicle distribution and carry a Market Dislocation Summary showing premium shifts "due solely to the elimination" of the factor, with the offsetting base rate change, by coverage and overall (CDI, 2019).

Apply that to marital status and the arithmetic is fixed before any filing is made. If the factor's relativities are, say, 1.00 for married and 1.05 for single drivers, and the book is half and half, deleting the factor and holding revenue drops single drivers' premium by about 2.4 percent and raises married drivers' by 2.5 percent. That conceded loss differential stays in the pool. What changes is that married drivers now fund it through a base rate that no longer distinguishes them.

Departmental research put numbers on a larger version of the same move. Modelling a large California insurer that removed gender, marital status and age simultaneously while keeping years licensed, Hunstad reported bodily injury premium changes of minus 9 percent for single males under 25, minus 3 percent for single females under 25, plus 11 percent for married drivers under 25 of either sex, and plus 1 percent for everyone older (Hunstad, 1995). Marital status alone moves less than that bundle, but the direction and the payers are the same.

Combinations are harder. Where marital status is rated jointly with years of driving experience, the 2019 guide requires the combination to be separated, experience isolated first, and each remaining component's weight recomputed on the same vehicle distribution. Those weights must then satisfy 2632.8, which orders safety record above mileage above experience above every optional factor and caps any corrected factor at 0.25 above the next. A factor leaving a combination can push a mandatory factor out of order, and the fix is pumping: Hunstad's compliance model had to lift one insurer's mileage weight from 173 percent to 2,123 percent to get there (Hunstad, 1995).

The Proxies the Release Names Are Also Off Limits

Income, educational attainment and employment are the variables the Department now says marital status stands in for. None of those is a permitted factor. Section 2632.4 bars any factor not listed in the regulations, and 2632.5(d) lists vehicle characteristics, use, academic standing, driver training, persistency, multi-policy and claims history, but no income or employment variable (10 CCR 2632.4, 2632.5). So the signal the Department told the court was real cannot be re-captured through any lawful factor once (d)(9) is gone; it can only be averaged into the base rate or, in insurers' filings, sought inside persistency and multi-policy relativities that the Department reviews against loss data.

Industry's objection is about that averaging. Rex Frazier of the Personal Insurance Federation of California said eliminating such factors produces "progressively similar rates that don't distinguish among drivers" (Los Angeles Times, September 16, 2026). In the release, the Department's answer is that any resulting rate or class plan change goes through the Prop 103 review process and must be justified and not excessive, which is the same process the site measured in August at a 226-day average for auto filings.

That clock is the constraint. A carrier that must file a revenue-neutral class plan without marital status by July 2027, and has a rate indication of its own pending, queues both through the same review, with the Market Dislocation Summary judged on a vehicle distribution that will have moved by the time the plan is approved. What the method guarantees is exact only on the day it is calculated.

Further Reading

Sources

  1. California Department of Insurance, "Commissioner Lara Proposes Ending Use of Marital Status in California Auto Insurance Rates," press release, September 16, 2026 (via InsuranceNewsNet)
  2. Ison v. Lara, A170267, California Court of Appeal, First District, Division Three, July 16, 2026 (majority and dissent)
  3. 10 CCR 2632.5, Rating Factors (mandatory and optional factors)
  4. 10 CCR 2632.8, Sequential Analysis (weight ordering and correction factors)
  5. California Department of Insurance, "Guide to Removing Gender as a Rating Factor from Personal Auto Programs," 2019
  6. Lyn Hunstad, "Measuring and Modifying the Effect of Auto Rating Factors," Journal of Insurance Regulation, Vol. 14 No. 2, 1995 (California Department of Insurance)
  7. Laurence Darmiento, "In reversal, California regulator says unmarried drivers should not pay more for auto insurance," Los Angeles Times, September 16, 2026
  8. Insurance Journal, "California Insurance Commissioner Proposes End to Marital Status Use in Auto Rates," September 17, 2026
  9. Insurance Business, "Court upholds marital status as valid auto rating factor in California," July 2026