Obamacare Enrollment Drops 18%: What Rising ACA Premiums Mean for 2027

The Affordable Care Act’s individual market contracted sharply in 2026, but the 18% decline is not evidence of a single, simple Obamacare enrollment collapse. The end of enhanced premium tax credits increased what many households paid for coverage, while federal eligibility actions also removed people from subsidized coverage or ended their coverage. Those forces matter as insurers seek another round of substantial rate increases for 2027.

KFF estimates that individual-market enrollment fell by roughly 4.6 million people between June 2025 and June 2026, from 25.2 million to 20.5 million. Separately, insurers have proposed a median 15% ACA Marketplace premium increase for 2027, according to KFF’s review of filings. That is a proposed rate, not a final rate or a forecast of what every household will pay. Still, the combination points to the central risk for the post-credit market: higher consumer costs can reduce enrollment, and a smaller or less healthy risk pool can in turn put upward pressure on premiums.

The 18% individual-market decline is larger than the Marketplace payment-based drop

The 18% figure covers the individual market, including ACA Marketplace coverage and off-exchange plans purchased directly from insurers. About nine in 10 people in this market obtain coverage through ACA Marketplaces, but the distinction matters: it is not a Marketplace-only count.

The Marketplace measure that most closely captures people who actually have coverage showed a smaller decline. February 2026 effectuated enrollment was 19.2 million, down 12% from 21.8 million a year earlier, KFF reported. “Effectuated” enrollment is a more useful measure than a plan-selection total for assessing active coverage because it reflects consumers who paid premiums and obtained coverage.

The 2026 open-enrollment headline and the later enrollment count should therefore not be treated as interchangeable. The Centers for Medicare & Medicaid Services reported 23.1 million Marketplace plan selections or automatic re-enrollments for 2026, near a record high. That figure reflects plan selection or automatic re-enrollment, not necessarily the maintenance of paid coverage after the coverage year begins. CMS also said new-consumer enrollment fell 13% from the 2025 open-enrollment period.

The difference is consequential for interpreting demand. Plan selections show that many people still entered the Marketplace process. Effectuated enrollment better shows whether the resulting premium obligation, eligibility status and other coverage requirements produced sustained enrollment.

Expired enhanced tax credits changed what ACA coverage cost households in 2026

The affordability mechanism is straightforward, even if its effect varies by household. Enhanced premium tax credits expired at the end of 2025. KFF reported that their expiration was associated with a 58% average increase in consumers’ out-of-pocket premiums for 2026. It also reported roughly $1,000 higher deductibles per person.

Those are two different forms of financial exposure. A higher premium affects the recurring monthly cost of keeping a policy in force. A higher deductible raises the amount an enrollee may have to pay for covered care before the plan begins sharing more of the cost. A household can therefore face a more expensive coverage decision even when focusing only on the premium understates the change in its potential health-care spending.

This helps explain why insurer rate headlines do not map neatly onto what consumers experience. An insurer’s filed or approved premium change applies to the underlying plan price. A consumer’s net premium depends in part on the tax credit available to that consumer. When enhanced assistance ends, the loss of subsidy support can produce a much larger out-of-pocket increase than the insurer’s annual rate adjustment alone would suggest.

The evidence supports an affordability explanation for at least part of the enrollment decline; it does not establish that every departure from coverage was caused by price. Some people may have changed coverage circumstances, and administrative eligibility actions also affect comparisons.

Insurers’ proposed 2027 rate increases cite medical costs and a shrinking risk pool

Across 276 insurers in all 50 states and Washington, D.C., the median proposed ACA Marketplace premium increase for 2027 was 15%, according to KFF’s analysis of rate filings. It would be the second consecutive year of double-digit proposed increases. KFF said the median finalized increase for 2026 was 20%.

These are filings, not final premiums. Regulators can review and alter requests, and the median does not describe every insurer, state, plan or enrollee. Nor does it determine a particular household’s 2027 net premium, which will depend on the final plan price and applicable financial assistance.

Insurers cited higher prices for medical services, general inflation and labor shortages as major drivers of their 2027 requests. They also pointed to the expiry of enhanced premium tax credits and deteriorating risk-pool health as individual-market enrollment declines.

That last point describes a potential feedback loop, not an established prediction. If people who are more price-sensitive leave coverage while people expecting greater medical use remain enrolled, the average expected cost of the remaining pool can rise. Insurers may then seek higher premiums to cover anticipated claims costs. Higher premiums can create further affordability pressure. Whether that dynamic intensifies in 2027 will depend on final rates, enrollment behavior and the health profile of people who retain or take up coverage.

Medical-cost trends and risk-pool concerns also mean the rate story cannot be reduced solely to the subsidy expiration. The filings identify multiple cost pressures. But the end of enhanced credits is especially important for consumers because it changes the gap between the plan’s full premium and the amount many households pay themselves.

CMS eligibility actions mean affordability is not the sole explanation for lower enrollment

Enrollment totals are also affected by enforcement and eligibility administration. CMS said it ended advance premium-tax-credit payments or coverage for nearly 1.5 million people on HealthCare.gov in 2025 after identifying ineligible or unauthorized enrollments, complicating year-over-year comparisons with prior enrollment totals.

It would be too broad to attribute the entire 4.6 million-person decline to higher premiums or the expiration of enhanced tax credits. The available figures show both a material increase in consumers’ out-of-pocket costs and an administrative removal of people who CMS said were ineligible or unauthorized; they do not cleanly allocate the overall decline between those factors. A coverage decline caused by people no longer qualifying for subsidies differs from one caused by eligible consumers deciding coverage is unaffordable. Both reduce headline enrollment, but the first concerns eligibility while the second more directly concerns affordability for eligible consumers.

The post-credit market remains larger than it was before the subsidy expansion

The scale of the 2026 retreat should not obscure the longer comparison. Even after the 18% year-over-year decline, June 2026 individual-market enrollment remained about 53% higher than it was in June 2019, before enhanced premium tax credits were introduced, KFF found.

That comparison is a constraint on claims that the individual market has reverted to its pre-expansion size or has simply collapsed. It has contracted from its 2026 peak, yet it remains structurally larger than before the enhanced subsidies. The more immediate question for 2027 is whether final rate decisions and the absence of enhanced credits leave the market at that higher plateau, or whether affordability and risk-pool pressures continue to erode it.

For now, the clearest established facts are narrower: active Marketplace enrollment fell less than the broader individual-market count; household costs rose markedly after the credit expansion ended; and insurers’ 15% median 2027 increase remains a proposal rather than a final consumer bill.

Disclaimer: This article is provided for informational purposes only. It is not offered or intended to be used as legal, tax, investment, financial, or other advice.