Obamacare premiums set to surge 30% as subsidy support falls away

The Affordable Care Act marketplace is entering one of its most turbulent periods since its launch, as premiums are set to climb sharply and federal subsidies are poised to expire, creating potential ripple effects across insurers, investors, and consumers.

According to final rate filings from the Centers for Medicare and Medicaid Services, the cost of mid-level “silver” plans sold through Healthcare.gov will rise about 30 percent next year. The increase affects roughly 17 million Americans who purchase coverage through the federal exchange, representing the steepest average gain since 2018.

The jump comes as pandemic-era subsidies that helped keep coverage affordable are scheduled to end in December unless Congress intervenes. Those tax credits, first introduced under the American Rescue Plan and extended through the Inflation Reduction Act, significantly lowered costs for millions of enrollees. Their expiration has become a flashpoint in budget negotiations that have already led to a prolonged government shutdown.

Democrats argue that extending the assistance is essential to maintain affordability, while Republicans say the temporary relief has outlived its purpose. If no deal is reached, millions could see their insurance costs double or even triple in 2026.

Insurers prepare for a market reset

For health insurers, the adjustment marks the end of a period of relatively stable growth. Marketplace enrollment has doubled since 2020 to about 24 million this year, buoyed by expanded subsidies and a broad, younger risk pool. But with subsidies ending and medical inflation accelerating, the economic balance of the individual market is changing.

Insurers have attributed the rate hikes to rising hospital, drug, and labor costs, as well as a shrinking share of healthy enrollees expected to maintain coverage if prices rise. The Congressional Budget Office estimates that keeping the enhanced subsidies for another decade would cost about US$350 billion, a price tag that has become a central point of contention on Capitol Hill.

Idaho’s early warning

Idaho’s state-run marketplace, which began open enrollment earlier this month, provides a preview of the broader national picture. “On average, gross premiums, or the overall cost of the premium, has gone up about 10 percent. And the net premium, or the amount the consumer pays after the tax credit has been applied, has increased about 75 percent,” said Pat Kelly, executive director of Your Health Idaho, in an interview with The Hill.

Roughly 13,000 of Idaho’s 135,000 marketplace participants earn more than four times the federal poverty level and will lose access to subsidies unless Congress extends them. Most of those households are expected to stay insured, but often at significantly higher costs. Automatic renewals may mean some do not realize how much their monthly payments will rise until new rates take effect.

Uneven impact across states

The magnitude of the premium increases will vary widely by geography and Medicaid expansion status. States that expanded Medicaid eligibility will see fewer uninsured residents, while non-expansion states such as Mississippi, Tennessee, and South Carolina face much larger coverage gaps.

The Urban Institute projects that uninsured rates could rise sharply in several Southern states if subsidies end, while KFF’s analysis suggests households in Wyoming, West Virginia, Connecticut, and Illinois could experience premium jumps ranging from 535 to nearly 700 percent.

For older enrollees, the financial strain could be acute. Gideon Lukens of the Center on Budget and Policy Priorities noted that a 60-year-old couple in Idaho could face an annual premium increase of about $18,000, roughly in line with national averages for their age group.

Market implications and investor outlook

For investors and insurers alike, the ACA’s next chapter is one of recalibration. Companies such as Centene Corp. and Elevance Health, major players in the exchange market, could face short-term margin compression but also longer-term pricing power if competition declines and risk pools narrow.

Some states are exploring policy solutions to mitigate volatility. Joel White, president of the Council for Affordable Health Coverage, said certain states are reviving high-risk pool programs to offset costs for high-claim policyholders. “Those risk pools lowered premiums in those markets by an average of about 20 percent,” he said.

As the November 1 enrollment period approaches, insurers are preparing for uncertainty. Unless Congress extends subsidies soon, millions of consumers—and the insurers who serve them—will begin 2026 in a market defined by higher prices, reduced affordability, and renewed debate over the future of the ACA.

ACA Market Snapshot (2025)