The Affordable Care Act (ACA) changed how Americans get health coverage. It sets clear eligibility rules for subsidized plans through the Health Insurance Marketplace. Unlike employer plans, Marketplace eligibility boils down to four things: where you live, how much you earn, your citizenship status, and whether you're incarcerated. HR leaders and benefits pros need to understand these rules, especially when layering tools like WellthCare on top of an employer-sponsored, ACA-compliant plan to add preventive and wealth-building benefits. WellthCare, a benefit system that works alongside an employer's ACA-compliant plan at no new employer out-of-pocket cost, rewards preventive actions with Store dollars and automatic retirement contributions while lowering claims and improving retention.
Who Can Sign Up for an ACA Marketplace Plan?
To qualify, you must hit all these marks:
- You live in the U.S. Specifically, the state where you apply. Plans are state-specific.
- You're a U.S. citizen, national, or lawfully present immigrant. That includes green card holders, refugees, asylees, and certain visa holders. Undocumented immigrants aren't eligible, even if they pay full price.
- You're not incarcerated. Currently serving time in a prison or jail? No Marketplace coverage. But if you're awaiting trial or on probation or parole, you're generally eligible.
- You don't have other minimum essential coverage (MEC). If you can get affordable employer coverage, Medicare, Medicaid, CHIP, or TRICARE, you usually can't get premium subsidies. You can still buy a plan at full price.
- Your income falls within subsidy range (if you want financial help). To get premium tax credits or cost-sharing reductions, your household income must be between 100% and 400% of the Federal Poverty Level (FPL).
Special Enrollment Periods: When Life Happens
Outside the annual Open Enrollment Period, you can still enroll if you have a Qualifying Life Event (QLE). Common QLEs:
- Losing other health coverage (job-based plan ends, COBRA runs out, or you age off a parent's plan)
- Changes in household size (marriage, divorce, birth, adoption)
- Moving to a new state or ZIP code
- Income changes that affect subsidy eligibility
- Gaining citizenship or lawful presence
You typically have 60 days from the QLE to enroll, and you can apply up to 60 days in advance for some events, like marriage or losing coverage.
Who Can't Use the Marketplace?
The ACA expanded access, but some groups are still left out:
- Undocumented immigrants: cannot buy Marketplace plans at any price. Lawfully present immigrants can.
- Incarcerated individuals: those serving a sentence are ineligible.
- People with affordable employer coverage: if your job offers self-only coverage that costs no more than 9.96% of your household income (the 2026 threshold, indexed annually) and covers at least 60% of average costs, you can't get subsidies. Family members can still qualify if the employer's family coverage is unaffordable, under the rule that fixed the family glitch in 2023. You can still buy a Marketplace plan at full price.
- Medicare enrollees: once you're on Medicare (Parts A, B, or C), the Marketplace is off-limits.
How Income Shapes Your Subsidies
Even if you meet all the other criteria, subsidy amounts depend on your income relative to the FPL. The rough breakdown (income levels adjust each year):
- 100% to 150% FPL: Largest subsidies; cost-sharing reductions on Silver plans.
- 151% to 200% FPL: Large premium credits; cost-sharing reductions on Silver plans.
- 201% to 250% FPL: Moderate premium credits; smaller cost-sharing reductions.
- 251% to 400% FPL: Smaller premium credits; no cost-sharing reductions.
- Above 400% FPL: No premium tax credits or cost-sharing reductions.
Important: In states that expanded Medicaid, adults below 138% of FPL generally qualify for Medicaid instead of Marketplace subsidies. In states that have not expanded Medicaid, adults below 100% of FPL can fall into a coverage gap with no Medicaid and no premium tax credits. Low-income applicants may need to go through their state's Medicaid office first.
Enhanced Subsidies Expired at the End of 2025
From 2021 through 2025, temporary changes to the premium tax credit removed the 400% FPL cap and capped benchmark plan premiums at 8.5% of income. Those enhancements expired at the end of 2025. For 2026 coverage, the 400% cap is back: households above 400% of FPL get no premium tax credit, and subsidies below that line are smaller than they were in 2025. The Urban Institute projects about 4.8 million people will lose coverage in 2026 now that the credits have expired. Benefits pros should flag this for employees renewing from 2025 plans, since 2026 renewal notices will reflect smaller credits or none at all.
What Employers Need to Know About ACA Eligibility
For employers, the Employer Mandate is key. Applicable Large Employers (ALEs) with 50+ full-time equivalent employees must offer Minimum Essential Coverage to at least 95% of full-timers (and dependents up to age 26) or pay penalties. Key rules:
- Full-time status: Employees working 30+ hours per week are full-time.
- Affordable offer: The employee's share of the premium for self-only coverage must not exceed 9.96% (indexed annually) of household income in 2026.
- Minimum value: The plan must pay at least 60% of total allowed costs.
Employers who meet these criteria ensure workers can't get subsidized Marketplace coverage. Employees can still buy Marketplace plans at full price if they prefer.
How WellthCare Fits In
The ACA gets people covered, but it doesn't bridge the gap between insurance and long-term health or financial security. That's where WellthCare comes in. WellthCare isn't insurance. It works alongside an employer's ACA-compliant plan and gets used first. It turns preventive health actions into automatic retirement contributions and spendable rewards through the WellthCare Store, so employees get more from their coverage. Employers see lower claims and higher retention. WellthCare is an employer-sponsored benefit, so employees gain access when their employer offers it on top of its ACA-compliant group plan. Members then use the patent-pending Health-to-Wealth platform to build wealth through everyday health actions.
Bottom Line for Benefits Pros
ACA eligibility sounds simple but gets messy with subsidies, Medicaid expansion, and employer mandates. Common pitfalls: misestimating income, missing enrollment windows, and assuming all low-income workers qualify for subsidies; they might qualify for Medicaid in expansion states instead, or fall into the coverage gap in non-expansion states. Pairing ACA coverage with something like WellthCare lets employers create a system where employees get care and are rewarded for using it wisely. That closes the loop between having insurance and getting healthier.