A 59-year-old pays 2.04 times the standard ACA benchmark premium in 2026, up to $2,269 a month in Wyoming, the most expensive state. Every year, the Centers for Medicare & Medicaid Services publishes ACA premium data anchored to a 40-year-old. That benchmark drives how subsidies are calculated, how journalists cover open enrollment and how states compare their markets. It's the right lens for most marketplace activity.
But for the 5.5 million Americans ages 55 to 64 enrolled in ACA plans (the single largest 10-year age band in the marketplace), the 40-year-old figure offers little insight into their costs. Under the ACA's age-rating rules, a 59-year-old pays 2.04 times as much in most states. The figure comes from the standard CMS age curve, built into federal rate-filing requirements and confirmed against age-band data in CMS Rate Public Use Files. Two states (Massachusetts and New Jersey) use state-specific age curves with a narrower ratio; their figures in this analysis reflect those curves.
In Wyoming, the most expensive state in this analysis, the age-40 Silver benchmark is $1,114 a month. For a 59-year-old, the same plan costs $2,269 a month ($27,228 a year). The gap applies nationwide. It compounds whatever the base rate is in any state.
This analysis uses MoneyGeek's 2026 ACA premium dataset to calculate what a 59-year-old pays in all 50 states and Washington, D.C. For 48 age-rated states, the federal default curve produces a ratio of 2.037 (rounded to 2.04) between the age-40 and age-59 rate factors. Massachusetts and New Jersey use state-specific curves with a narrower 1.637 ratio. Three jurisdictions (New York, Vermont and Washington, D.C.) use community rating, where age doesn't affect premiums.
The 2026 open enrollment period arrived alongside a new financial reality. The enhanced premium tax credits first enacted by the American Rescue Plan Act of 2021 and extended through 2025 expired on December 31, 2025. Congress did not renew them. For a 59-year-old earning above 400% of the federal poverty level (roughly $62,400 for a single individual in 2026), the subsidy support that once softened these costs is gone. The state-by-state dollar impact of that expiration on unsubsidized enrollees appears in MoneyGeek's ACA Subsidy Cliff 2026 analysis. This analysis examines the underlying premium structure: what age-rated coverage costs before subsidies apply.


