Trump’s “One Big Beautiful Bill” Could Cut Obamacare Enrollment, Raise Premiums, and Limit Access

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Major ACA Changes Loom Under Trump’s New Healthcare Legislation

President Donald Trump’s proposed “One Big Beautiful Bill” — a sweeping tax and spending measure — is raising red flags among health policy experts. If passed, the bill could drastically alter how more than 24 million people access and afford coverage through the Affordable Care Act (ACA), commonly known as Obamacare.

Key provisions would reshape enrollment procedures, limit coverage options for certain life events, shorten the enrollment period, and eliminate expanded premium subsidies. These changes could result in millions losing coverage and higher insurance costs for those who remain enrolled.

1. Stricter Paperwork Rules Could Delay or Deny Coverage

The House-passed version of the bill includes new paperwork mandates that would apply to most ACA enrollees starting in 2028.

Currently, over 90% of ACA users receive tax credits to reduce monthly premiums. The bill proposes to end automatic yearly reenrollment for the majority of policyholders, requiring them to manually verify personal and income information each year to qualify for subsidies.

Experts warn this change could lead to confusion and drop-offs in coverage, especially among younger and healthier individuals who may opt out rather than navigate new administrative hurdles.

2. Life Changes May No Longer Trigger Immediate Coverage

Under current rules, people experiencing major life events — like marriage, childbirth, or job loss — can get temporary eligibility for tax credits while their application is processed.

The bill proposes eliminating this provisional eligibility, meaning individuals must provide complete documentation upfront before receiving subsidies.

This could hit new parents particularly hard, as newborns often don’t receive Social Security numbers for several weeks. During that time, families may be denied premium support, forcing them to cover full costs temporarily.

The Congressional Budget Office (CBO) estimates that just this provision alone would leave 700,000 more people uninsured by 2034.

3. Enrollment Windows Would Shrink

Trump’s bill would formally shorten the ACA open enrollment period by nearly a month, ending it on December 15 instead of mid-January — a policy change first proposed under his previous administration.

Additionally, a special enrollment period created by the Biden administration that allows lower-income families to enroll year-round would be repealed.

While critics argue that open-ended enrollment opens the door to fraud, state regulators and policy experts suggest the solution lies in improving system safeguards, not restricting access.

4. Premiums and Out-of-Pocket Costs Likely to Rise

One of the most impactful changes would be the expiration of enhanced premium subsidies introduced during the COVID-19 pandemic. These subsidies have helped double ACA enrollment since 2020 but are not extended in Trump’s proposed bill.

Without these supports, families earning above four times the federal poverty level would face an abrupt cutoff in eligibility — also known as the “subsidy cliff.”

Experts estimate that premiums could jump by an average of 75% nationally for many enrollees if the enhanced subsidies lapse. The CBO projects that up to 4.2 million more people will be uninsured by 2034 as a result.

What’s Next in the Senate?

Senate Republicans are now considering whether to adopt the House’s proposals into their version of the bill, aiming to pass it by July 4. As debate continues, stakeholders from across the health industry warn that the proposed changes could significantly reduce access and affordability in the individual insurance market.