The Affordable Care Act marketplace is shrinking fast. Major insurers are pulling back, enrollment numbers are dipping, and bronze plan uptake is surging. As enhanced premium subsidies expire, the risk pool reshapes ahead of 2027 — and consumers face higher out-of-pocket costs. Here is what you need to know.
The Latest Insurer Exits
Cigna Announces Full ACA Withdrawal
Cigna confirmed on April 30 that it will exit the ACA business entirely by the end of 2026. Its individual and family plans currently cover 369,000 lives across 11 states. Incoming CEO Brian Evanko addressed the move directly during the company’s first quarter earnings call. “This is small business for us today, and it’s been shrinking in recent years,” he said. Consequently, Cigna sees no strategic future in the individual marketplace.
Baylor Scott & White Also Walks Away
Similarly, Baylor Scott & White Health Plan announced in April that it will stop offering individual marketplace plans after 2026. The plan serves roughly 100,000 enrollees — about 2.6% of all ACA customers in Texas. Its exit adds further pressure on remaining carriers in the state.
Aetna Already Gone
Moreover, Aetna left the ACA market at the end of 2025. That exit forced approximately one million enrollees across 17 states to seek new coverage for 2026. CVS Health, Aetna’s parent company, cited continued financial underperformance as the key reason for its departure.
Broader Market Pullback Trends
UnitedHealthcare Scales Back Enrollment
Beyond full exits, several major insurers are quietly shrinking their footprints. UnitedHealthcare, for instance, plans to reduce its ACA enrollment by roughly one-third in 2026. The company is prioritizing margin recovery instead of membership growth. UnitedHealthcare CEO Tim Noel explained the strategy on the company’s Q1 earnings call: “Our approach in the ACA market continues to be directed toward the bronze and gold tiered products, where member mix and utilization rates are largely aligned with plan.” Furthermore, UnitedHealthcare has pledged to refund any 2026 profits from its ACA plans, and projects exchange margins of around 1% after repricing.
Regional Carriers Also Retreat
In addition to national insurers, many regional carriers reduced their service areas last year. This trend reflects a broader industry reassessment of ACA profitability — particularly as the expiration of enhanced subsidies shifts the patient mix toward higher-risk, lower-income enrollees.
Centene Faces Enrollment and Mix Pressure
Membership Falls Sharply Year Over Year
Centene, the largest marketplace carrier in the country, reported that its ACA membership fell to 3.6 million in Q1 2026 — down from 5.6 million a year earlier. CEO Sarah London shared the breakdown on April 28: over one-third of Centene’s marketplace members now hold bronze plans. Meanwhile, fewer than half remain in silver plans, with the rest holding gold coverage.
Silver Retention Remains Strong
Despite the overall decline, Centene’s silver tier shows resilience. Notably, 75% of its silver membership came from renewals. London also noted that membership losses across most markets came in below expectations. “This suggests that more healthy members stayed in the market in aggregate and that our pricing was appropriate relative to the overall market morbidity,” she said. However, London acknowledged that Centene did not pursue an aggressive bronze strategy, and she expects “a meaningful risk adjustment offset” as silver plans retain higher-acuity members.
Overall ACA Enrollment in 2026
Total Enrollment Drops but Remains Elevated
According to a CMS report released on March 27, ACA enrollment reached 23.1 million in 2026 — a 5% decrease from 2025. That represents a decline of roughly 1.2 million consumers. Nevertheless, the figure stays 8% higher than 2024 levels and 41% above 2023 totals.
Bronze Plans Dominate the Shift
The composition of ACA enrollees has shifted meaningfully. Bronze plan enrollment grew 26% nationally, rising from 7.3 million to 9.2 million — even as total enrollment fell. As a result, the share of ACA members in bronze plans jumped from 30% in 2025 to 40% in 2026. Texas recorded the largest increase in bronze enrollment, while West Virginia saw the largest decrease.
Out-of-Pocket Costs Rise Sharply
Average monthly premiums after tax credits rose to $178 in 2026, up from $113 in 2025. Additionally, approximately 14% of ACA policyholders failed to pay their first monthly premium bill this year. In a typical year, that non-payment rate sits in the mid-single digits — making 2026 a significant outlier.
What This Means for Consumers
The ACA marketplace is entering a period of structural stress. As large insurers retreat and subsidies shrink, consumers in many states face fewer plan options and higher costs. Those in markets once served by Cigna, Aetna, or Baylor Scott & White must now act early to find replacement coverage before 2027 open enrollment begins. Furthermore, the surge in bronze plan uptake signals that affordability — not comprehensive coverage — is driving enrollment decisions for millions of Americans.
Policymakers, remaining insurers, and consumer advocates will need to respond swiftly to prevent further erosion of the marketplace’s stability.
