US health insurers are requesting a median premium increase of 15% for Obamacare plans in 2026, marking the largest proposed jump since 2018. This increase is primarily attributed to the upcoming expiration of federal premium tax credits, which would otherwise keep costs lower for consumers. The enhanced tax credits, extended by the Inflation Reduction Act through 2025, if not renewed, could lead to out-of-pocket premium payments increasing by over 75% on average for individuals, with a family of three earning $110,000 potentially seeing their monthly bill jump from $779 to $1,662.

Beyond the expiring subsidies, insurers also cite several other factors contributing to the higher proposed rates. The underlying cost of healthcare is expected to rise by around 8%, with GLP-1 weight-loss and diabetes drugs, like Ozempic and Wegovy, being significant drivers of increased costs, alongside labor market pressures in negotiations with healthcare providers. Additionally, insurers have expressed concern about potential tariffs on imported drugs, medical equipment, and supplies, which some estimate could raise premiums by an additional 3%.

Several insurers have noted slower market growth, changing enrollment patterns, and a rise in higher-risk patients in Affordable Care Act plans. The uncertainty surrounding the "ACA Integrity Rule" and the potential impact of tariffs on pharmaceuticals manufactured overseas are also contributing to the proposed rate hikes. These factors lead to a likely exodus of healthier enrollees, creating a sicker risk pool and further upward pressure on premiums. Faced with these challenges, companies like UnitedHealth and Centene have already adjusted their profit expectations.