Premiums for health plans sold through the federal insurance exchange could jump substantially next year, perhaps more than at any point since the Affordable Care Act marketplaces began in 2013.

An early analysis by the Kaiser Family Foundation shows that proposed rates for benchmark silver plans — the plans in that popular tier of coverage that determine enrollees’ tax subsidies — are projected to go up an average of 10 percent across 14 major metropolitan areas.

The analysis, released Wednesday, is based on insurers’ initial filings in 13 states and the District of Columbia.

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Next year’s premiums for health coverage under the Affordable Care Act could rise more than in past years in most markets and declines might be rare, according to a preliminary analysis of insurers’ plans.

Overall, premiums for a popular type of plan — the second-lowest silver plan — could rise 10 percent on average next year in 14 major metropolitan areas, according to an analysis released Wednesday by the Kaiser Family Foundation. Kaiser based its projections on insurers’ preliminary rates filed with state regulators, which remain subject to state or federal review. (KHN is an editorially independent program of the foundation.)

Last year, premiums for the second-lowest silver plan in those metro areas rose 5 percent after state insurance departments signed off, Kaiser said.

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