The Centers for Medicare & Medicaid Services has proposed that health insurance exchanges confirm a household’s income, family size, citizenship or immigration status, other coverage and place of residence before any Affordable Care Act subsidy is paid. The proposal, dated October 23, would apply to eligibility determinations for plan year 2028. The first verification window would open August 1, 2027, according to the CMS fact sheet.
Proof first, premium help second
The proposal is a rule numbered CMS-9873-P, and it is only that, a proposal. It would bring exchange procedures in line with premium tax credit changes in section 71303 of Public Law 119-21, and CMS says Treasury issued related regulations on October 15. The Federal Register notice runs 203 pages and is scheduled for publication on October 27.
Today, an exchange that cannot confirm something electronically puts the consumer into what is called an inconsistency period and asks for documents. During that period, people who appear eligible receive advance premium tax credits and cost-sharing reductions, and the aid is generally reduced or ended if the proof never arrives. Under the proposal, exchanges would no longer be allowed to pay financial assistance during that period.
A consumer in that spot could still enroll in exchange coverage, but without financial assistance while the verification is pending. For a household that counts on a subsidy, the order of operations is the story: proof of income, family size, status, other coverage and residence would come before the first dollar of help, not after the first bill.
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A verification window that opens August 1, 2027
Every exchange would have to offer a pre-enrollment verification period to new and returning applicants, starting each year on August 1, so that eligibility can be confirmed ahead of the next coverage year. CMS says the first such window would start August 1, 2027, for 2028 coverage. Nothing in the fact sheet changes 2027 coverage.
The proposal also adds what CMS calls contingent plan selection. A consumer could pick a plan during open enrollment or a special enrollment period, and the choice would take effect only if the exchange finds the person eligible for financial assistance. That would let someone who skipped enrolling during an inconsistency period sign up later, even after the enrollment period has ended.
Effective dates would depend on the path. Consumers already enrolled whose aid is later verified would receive assistance retroactively for the inconsistency-period months in which they were enrolled. Those who select a plan pending verification would see enrollment and aid start from the date of verification. CMS says the timing rules are meant to limit adverse selection.
Where the proposal bends for births, marriages and other changes
One group would be excused from the new verification step. It covers certain family-size changes defined in Treasury’s regulations, and aid during an inconsistency period would rest on the information the applicant attested to. The qualifying events are a birth, an adoption, a marriage, or the loss of a dependent through divorce, separation or death, when the exchange allows that special enrollment period.
A voluntary report of a change would be treated differently. After an enrollee reports something that affects eligibility, an exchange would have to maintain or reduce financial assistance during the inconsistency period. CMS would also stop exchanges from pushing back the effective date of a redetermination beyond the first of the month after a change, for an enrollee without a special enrollment period.
Re-verification would repeat every year. Consumers already enrolled would be re-enrolled with financial assistance only if they return to the exchange and have their information confirmed again, and those who do not would be automatically re-enrolled without it. The rule would shift the annual renewal from a passive step to one that needs documents.
Who the proposal reaches, and what CMS still wants to hear
CMS names several groups. They are consumers applying for or renewing exchange coverage with financial assistance, currently enrolled consumers who must re-verify, people whose household size changes, state-based and federally run exchanges, states planning to become state-based exchanges, and insurers, who would gain flexibility on binder payment due dates.
States moving to their own exchange would face a changed clock. A state would have to apply 15 months before it begins operating as a state-based exchange for the pre-enrollment period, rather than 15 months before open enrollment. The rule would let state-based exchanges adopt the same changes.
CMS is asking for comment, including on how to strengthen family-size and residency checks and which data sources to use while limiting the burden on consumers and exchanges. The fact sheet describes a 30-day comment period after publication and carries no cost or enrollment estimate. A final rule would have to follow before any of it applies.
For households that buy coverage on HealthCare.gov or a state exchange, the question is what proof sits in the file drawer today. Income records, a count of who lives in the home, status documents, any other offer of coverage and proof of residence are the five categories CMS lists, and gathering them would start well before the 2028 enrollment season.
Getting ready to prove income for 2028 coverage?
The proposal is about proof: income, household size, status and residence would have to be confirmed before subsidy money moves. That is a story about one income-tested benefit, and a household gathering those papers is often a household that could also use other income-tested help it has not applied for.
The Benefits Checklist turns from this rule to that related job. It scans eleven benefit programs, with the 2026 income limits, a 50-state phone directory and a printable tracker that comes with the download. It does not deal with exchange verification itself, which stays a matter for HealthCare.gov.
Scan 11 benefit programs against the 2026 income limits in the Checklist →
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This article was produced with AI assistance and edited for accuracy against the sources linked above.
