The national average premium for the second-lowest-cost silver plan, or benchmark plan, sold through the Affordable Care Act exchanges is $438 per month in 2022, a 1.8% drop compared to 2021, according to an Urban Institute analysis. Average benchmark premiums, by state, ranged from $309 in New Hampshire to $766 in West Virginia. The premium variation was associated with the type and number of insurers participating in a region. The presence of a Medicaid insurer led to lower benchmark premiums. In 2021, the benchmark premium in a rating region with only one insurer was $189.5 higher per month than in regions with five or more insurers.