The Proposed IRS Rules That Tighten Marketplace Subsidy Eligibility and Verification

On October 14, 2026, Treasury and the IRS announced proposed regulations that put the One Big Beautiful Bill Act’s (OBBBA) premium tax credit changes into administrative practice. The proposed rules were published in the Federal Register the next day — REG-101576-26, 91 Fed. Reg. 65494 — and the IRS estimates they touch roughly 15.6 million people enrolled in Exchange coverage, about 13.5 million of whom may claim the credit.

If that sounds abstract, here is the practical version: the credit that pays part of your Marketplace premium is being narrowed by who you are (starting with the 2027 tax year) and gated by whether the Exchange verified your information (starting with the 2028 tax year). None of this is final yet — comments are open through November 30, 2026 — but the underlying statute is already law, and several of its changes are already in effect.

What is already in effect (2026)

One change does not wait for the regulations. The OBBBA removed the rule that let a lawfully present noncitizen with household income below 100% of the federal poverty line — the group sometimes called the “coverage gap” population, ineligible for Medicaid because of their immigration status — qualify for the premium tax credit. That removal took effect for taxable years beginning after December 31, 2025. For 2026, a household in that position no longer qualifies for the credit, where the previous rule allowed it.

The “eligible alien” rule — 2027

Starting with taxable years beginning after December 31, 2026, the statute adds a definition that does most of the work in these rules. An alien who is lawfully present counts as an “eligible alien” only if the person is — and is reasonably expected to be, for the entire enrollment period — one of three things:

1. Lawfully admitted for permanent residence (a green card holder);
2. A Cuban or Haitian entrant, as defined in the Refugee Education Assistance Act of 1980; or
3. An individual who lawfully resides in the U.S. under a Compact of Free Association (the COFA nations: the Marshall Islands, Micronesia and Palau).

The statute names those three categories and no others. Other lawfully present statuses — asylees and refugees who have not yet become permanent residents, holders of temporary visas, and others — are not in the list. For the credit computation, the consequences follow mechanically:

• Premiums attributable to a family member who is not lawfully present, or who is lawfully present but not an eligible alien, are subtracted from the household’s enrollment premium and from the benchmark premium used to compute the credit.
• That member is also excluded from the family-size and income-to-poverty computations that set the required contribution percentage.

For a mixed-status household, the credit is computed as if the non-eligible member’s premium did not exist — which typically means a smaller credit than the same household received for 2026. The proposed regulations add a reporting change that makes this visible: for households receiving advance credit payments, the Exchange must exclude those premium portions from Form 1095-A itself, so the form reports, say, one member’s $500 monthly premium rather than the full $1,000 the policy charges (the proposed rule uses exactly that two-person example). Anyone in this position should run their 2027 numbers during open enrollment — November 1, 2026 through January 15, 2027 on the federal platform — rather than assuming last year’s credit carries over.

The Medicaid work-requirement interaction — phasing in 2027

This is the least advertised piece, and it can matter to citizens and noncitizens alike. The OBBBA also added a community engagement requirement to Medicaid: most adults in the Medicaid expansion group must document at least 80 hours a month of work, community service, a work program, half-time education, or a combination. States must implement this no later than January 1, 2027, though a state can obtain a good-faith delay running no later than December 31, 2028.

Here is the interaction: someone denied Medicaid solely for failing the community engagement requirement is treated as eligible for Medicaid coverage for those months. Under the ACA’s structure, being eligible for Medicaid disqualifies a month from being a “coverage month” — so the premium tax credit does not apply to that month, even if the person enrolled in a Marketplace plan and paid the full premium out of pocket. The proposed regulations implement exactly that: the months lost to a community-engagement failure are not coverage months, and the treatment ends only once the person becomes ineligible for Medicaid for some other reason. An anti-abuse rule disregards Exchange determinations based on intentionally or recklessly false information.

The practical takeaway: losing Medicaid for not meeting a work requirement does not open a Marketplace subsidy for the lost months. State implementation varies — confirm your state’s status rather than assuming.

Verification becomes a condition of the credit — 2028

For taxable years beginning after December 31, 2027, a month counts toward the credit only if the Exchange has verified the enrollee’s eligibility. The proposed regulations spell out what gets verified and when:

• For every enrollee: place of residence, and citizenship or national status or lawful presence.
• For months with advance credit payments: additionally, household income, family size, absence of other qualifying coverage, and — for a lawfully present noncitizen — eligible alien status.
• If verification is pending when someone enrolls, and the Exchange later cannot verify eligibility, the months enrolled before removal are not coverage months.
• There is a waiver for special enrollment periods triggered by a change in family size (gaining a dependent, losing one through divorce, or a death) — verification can be completed after coverage starts in those situations.
• Two related statutory changes ride along: a plan does not count as a qualified health plan unless the Exchange offers a pre-enrollment verification process beginning no later than August 1 of the year before the enrollment year; and months can fail when the Exchange has not carried out the prior-year reconciliation checks (whether the tax filer filed and reconciled advance credits for a prior year).

Separately — and already effective for plan years beginning after December 31, 2025 — a plan enrolled in through a purely income-based special enrollment period does not count as a qualified health plan, so no credit attaches to it.

Status: proposed, with a real comment window

These are proposed regulations. Comments are due November 30, 2026 at regulations.gov (indicate IRS and REG-101576-26), and a telephonic public hearing is scheduled for December 8, 2026, at 10 a.m. ET. The administration’s stated rationale is program integrity — the announcement ties the rules to the removal of what CMS described as more than 760,000 unverified enrollees and the roughly $500 refunds to about a million enrollees who were overcharged. Supporters frame the changes as fraud prevention; critics view eligibility restrictions of this kind as coverage losses that fall on specific groups. Both readings exist, and the comment process exists in part to test them.

Two things are not settled by these documents. First, the verification procedures themselves — what an Exchange must ask for, and when — are to be addressed in parallel proposed regulations by the federal health agency that administers the Exchanges. Second, state-based marketplaces (22 of them) administer their own verification and enrollment processes, so procedures and dates vary by state even where the tax rule is federal.

What to actually do

1. Mixed-status household? Run your 2027 numbers during open enrollment with the narrower computation in mind, and check the Form 1095-A you receive for 2027 coverage (arriving in early 2028) — the reported premium should already exclude the non-eligible member’s share.
2. Respond to every Exchange notice. The verification regime turns unanswered notices into lost credit months. The mechanics of a subsidy-termination notice are covered in the duplicate-coverage subsidy notice.
3. Report income and household changes during the year, not at tax time — especially with the excess-credit repayment caps gone, an optimistic income estimate near the cliff repays in full. That math is in the subsidy cliff explainer.
4. Comment if the rules affect you. The November 30 deadline is real, and the docket accepts individual comments.
5. Watch for verification-themed scams. Any message demanding a fee, gift card, or one-time code to “verify your eligibility” or “keep your subsidy” is fraud — the Marketplace never charges for verification, and the $500-refund wave this fall already spawned lookalike scams (see the refund explainer).

The enrollment mechanics themselves are in ACA Marketplace Basics, and a survey of what the network covers is at omc.center/resources.

Bottom line

The statute already narrowed the credit; the proposed regulations explain how it will be administered. For 2026, the change that bites is the closed below-poverty route for some lawfully present noncitizens. For 2027, mixed-status households should expect the computation to skip non-eligible members entirely. For 2028, unverified months stop being coverage months at all. The rules are proposed, the comment window is open until November 30, 2026 — and none of it changes the first order of business this season: re-enroll actively between November 1 and January 15.

This article is general information about federal Marketplace and tax rules, not advice about your immigration status, tax situation, or plan choice. Eligibility depends on household composition, state, and year — confirm current rules at HealthCare.gov or your state’s marketplace, and consult a qualified professional for your specific situation.