For the second consecutive year, many insurers operating under the Affordable Care Act (ACA) marketplace are proposing double-digit premium increases for 2027, citing mounting medical costs alongside recent congressional and federal policy shifts. The trend reflects mounting pressure on the commercial health insurance market at a critical moment when ACA enrollment has begun declining after years of expansion.
Key takeaways
- Multiple ACA insurers are filing double-digit premium increase requests for 2027, continuing a trend from 2026
- Rising medical costs and policy changes from Congress and the Trump administration are primary drivers
- Enrollment in ACA marketplace plans has started declining after years of growth, reducing risk pools
- Premium increases may further reduce affordability and enrollment in already-vulnerable populations
ACA Marketplace Pressures: Rising Costs and Declining Enrollment
Key drivers of premium increase requests, 2026–2027
Source: ACA Marketplace Premium Submissions, 2026 | Georgian Medical Journal News
Medical Costs Driving Insurers’ Request for Rate Increases
Rising healthcare utilisation and medical service costs remain the primary factor behind the premium increase proposals. As reported in coverage of the Centers for Medicare & Medicaid Services (CMS) marketplace filings, insurers are experiencing higher claims volumes and increased treatment costs across multiple service categories, from emergency department visits to hospitalisation and prescription pharmaceuticals.
This cost escalation reflects broader trends in the U.S. healthcare system, where prices for hospital care, specialist services, and medications have continued climbing faster than inflation. Insurers argue that without premium adjustments, they cannot maintain adequate reserves or continue offering coverage in less-profitable markets, particularly rural and underserved areas.
Congressional and Federal Policy Changes Reshape Marketplace Economics
Beyond medical cost inflation, policy shifts by Congress and the Trump administration have altered the financial landscape for ACA insurers. Changes to subsidy structures, reinsurance programmes, and regulatory requirements have reduced federal cost-sharing with insurers, effectively shifting financial burden onto premium-paying consumers and marketplace operators themselves.
These policy modifications have narrowed the margin between claims paid and premiums collected, forcing insurers to seek higher rates to maintain financial viability. The combined effect of cost pressures and policy headwinds has created an environment where double-digit increases appear increasingly common across regional and national carriers.
Declining Enrollment Threatens Risk Pool Stability
Compounding these pressures, ACA marketplace enrollment has begun declining after years of growth, reducing the size of the risk pool and increasing per-capita claims. When healthier individuals exit the marketplace—whether due to rising premiums, coverage of alternative options, or reduced subsidies—the remaining population typically has higher medical needs, which further drives up average costs per enrollee.
This vicious cycle creates a challenging dynamic: as premiums rise, lower-income and younger enrollees may drop coverage, shrinking the pool and raising costs further. The result is a destabilising feedback loop that threatens the viability of even established ACA insurers in competitive markets.
Multiple ACA insurers filing double-digit premium increases for the second consecutive year, driven by rising medical costs, federal policy changes, and declining marketplace enrollment that has reduced risk pool stability.
— ACA Marketplace Premium Submissions, 2026
What this means
Frequently asked questions
Why are ACA insurers requesting such large premium increases?
Insurers cite three main drivers: (1) rising medical service costs and drug prices, (2) federal policy changes that reduce insurer subsidies and cost-sharing, and (3) declining enrollment that shrinks the overall risk pool, making remaining enrollees proportionally more expensive to cover.
Will my insurance subsidy cover the full premium increase?
Not necessarily. While ACA premium tax credits are designed to keep premiums stable as a percentage of income, large premium increases can push eligible plans beyond subsidy caps. If the second-lowest-cost silver plan (the benchmark for subsidies) increases 15%, your subsidy will increase with it—but if you choose a more expensive plan, you absorb the difference. Enrollees earning just above subsidy thresholds receive no help and bear the full premium increase.
What happens to the ACA marketplace if premiums keep rising and enrollment keeps falling?
The marketplace risks entering a death spiral: as premiums rise, more people drop coverage; the remaining pool becomes sicker and more expensive; insurers request even higher increases; more people leave. This can lead to insurers withdrawing from less-profitable regions, leaving consumers with fewer choices or no coverage options. Federal policy intervention—whether through increased subsidies, cost controls, or marketplace stabilisation measures—may be necessary to prevent this outcome.
The 2027 ACA premium proposals signal a marketplace under genuine fiscal stress. While rising medical costs are a nationwide challenge, the convergence of cost inflation, policy changes, and declining enrollment creates a uniquely volatile situation for ACA insurers and the roughly 21 million Americans who depend on the marketplace for health coverage. Whether policymakers act to stabilise the system through subsidy increases, cost controls, or regulatory reform will substantially shape the accessibility and stability of individual health insurance in the United States for years to come. The current trajectory suggests that without intervention, affordability—the ACA’s founding principle—is at increasing risk.
Source: Affordable Care Act insurers want more premium increases as enrollment sags
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