Open enrollment for 2027 health coverage opens today, Sunday, November 1, 2026 — and it opens with a jolt. Benchmark Silver plan premiums will cost 13% more on average in 2027, according to a KFF analysis published Friday, October 30, based on newly released federal plan data. The Centers for Medicare & Medicaid Services (CMS) released its own Plan Year 2027 fact sheet the same day; it did not give an average premium change. This is the second year of marketplace coverage without the enhanced federal premium help that expired at the end of 2025. That matters more than the headline number, because the help that used to soften premium increases is gone — and the prices you see on HealthCare.gov now reflect that. Here is what the 13% figure actually means, and the five moves to make before you pick a plan. What the 13% rise really is The benchmark Silver plan is the second-lowest-cost Silver plan in your area, and federal subsidies are pegged to it. When KFF says benchmark premiums ri...