Marketplace insurance is private health coverage you buy through a government-run exchange created by the Affordable Care Act, where insurers list plans side by side under federal rules and income-based financial help can bring your premium down substantially. Every plan on the marketplace has to meet the same coverage standards, and insurers cannot turn you away or charge you more for a pre-existing condition. What you pay depends on your age, your zip code, the plan you choose, and whether you qualify for subsidies.
Where You Shop
Most states use the federal platform at HealthCare.gov. Twenty-one states run their own exchanges with separate websites and enrollment systems, and two more operate their own exchanges but use the federal platform for eligibility and enrollment.1Centers for Medicare & Medicaid Services. State-based Exchanges If your state runs its own exchange, you’ll enroll through that state’s site rather than HealthCare.gov. The underlying rules on plan quality and financial help are the same either way.
Who Can Enroll
Three basic requirements: you must live in the United States, be a U.S. citizen or have a qualifying immigration status, and not be currently incarcerated. If you already have Medicare, you cannot enroll in a marketplace health or dental plan.2HealthCare.gov. Are You Eligible to Use the Marketplace?
There is no income floor or ceiling for buying a plan. Income only matters for financial assistance.
When You Can Enroll
You cannot sign up whenever you want. Enrollment happens in two windows.
Open Enrollment
Open enrollment runs November 1 through January 15. Pick a plan by December 15 and your coverage starts January 1. Enroll between December 16 and January 15 and coverage typically begins February 1.3HealthCare.gov. When Can You Get Health Insurance? State-run exchanges sometimes set slightly different deadlines.
Special Enrollment Periods
Outside open enrollment, you can only enroll if you experience a qualifying life event: getting married, having a baby, losing other coverage, moving to a new area, and similar changes. A special enrollment period usually gives you 60 days from the event.4HealthCare.gov. Special Enrollment Period
Losing coverage because you stopped paying premiums does not count as a qualifying event.5HealthCare.gov. Premium Payments, Grace Periods, and Losing Coverage Miss both windows and you’re uninsured until the next November, responsible for the full cost of any medical bills in the meantime.
The Four Plan Tiers
Marketplace plans fall into four metal tiers that describe how you and the insurer split costs. The tier doesn’t determine which doctors or hospitals you can see; it determines the share of total medical costs the plan is designed to cover.6HealthCare.gov. Health Plan Categories: Bronze, Silver, Gold and Platinum
- Bronze plans cover about 60% of costs. Lowest premiums, highest spending when you use care.
- Silver plans cover about 70%. Premiums and out-of-pocket costs sit in the middle, and Silver has a special role in how subsidies work.
- Gold plans cover about 80%. Higher premiums, less spending at the point of care.
- Platinum plans cover about 90%. Highest premiums, lowest costs when you receive care.
All four tiers cover the same essential health benefits. The difference is purely financial.
Catastrophic Plans
A fifth option exists for people under 30 or anyone who qualifies for a hardship or affordability exemption. Catastrophic plans carry very low premiums and very high deductibles, designed mainly to protect against worst-case bills.7HealthCare.gov. Catastrophic Health Plans Premium tax credits cannot be applied to them.
Network Types
Every plan uses a provider network that affects which doctors you can see and what you’ll pay. Three types dominate:8HealthCare.gov. Health Insurance Plan and Network Types: HMOs, PPOs, and More
- HMOs cover only in-network care, except in emergencies. You generally need a referral from a primary care doctor to see a specialist.
- PPOs let you see any provider, though you’ll pay less in-network. No referral needed for specialists.
- EPOs cover only in-network care like an HMO but usually don’t require referrals.
A Gold PPO and a Gold HMO split costs at roughly the same ratio, but the PPO gives you more flexibility outside the network. Before you focus on the tier, check whether your current doctors are in the plan’s network.
What Every Plan Covers
Regardless of tier or network, every marketplace plan covers ten categories of essential health benefits:9Centers for Medicare & Medicaid Services. Information on Essential Health Benefits Benchmark Plans outpatient care, emergency services, hospitalization, maternity and newborn care, mental health and substance use treatment, prescription drugs, rehabilitative services and devices, lab services, preventive care and chronic disease management, and pediatric services including children’s dental and vision.
Adult dental and vision coverage is not required. Some health plans bundle dental in and some don’t. If yours doesn’t, you can buy a standalone dental plan through the marketplace, but only at the same time you enroll in a health plan.10HealthCare.gov. Dental Coverage in the Marketplace
What You’ll Actually Pay
Insurers can only use five factors to set your monthly premium: your age, where you live, whether you use tobacco, which plan category you choose, and whether the plan covers dependents.11HealthCare.gov. How Health Insurance Marketplace Plans Set Your Premiums They cannot charge more for your health history, gender, or pre-existing conditions.
Age carries the largest weight. Insurers can charge older adults up to three times more than younger ones for the same plan.12Centers for Medicare & Medicaid Services. Market Rating Reforms Tobacco users can be charged up to 1.5 times the standard rate. Location matters because healthcare costs and insurer competition vary from county to county.
Premiums are just one piece. When you use care, you’ll run into three more costs:
- The deductible is what you pay before the plan starts paying its share. A Bronze deductible might sit above $7,000; a Platinum plan may have one in the hundreds or none at all.
- A copayment is a flat fee for a specific service, like $30 for a doctor visit.
- Coinsurance is your share expressed as a percentage. With 20% coinsurance on a hospital stay, you pay 20% and the plan pays 80%.
Every plan also has an annual out-of-pocket maximum. Once your deductible, copays, and coinsurance hit that ceiling, the plan pays 100% of additional covered services for the rest of the year.
Premium Tax Credits
Premium tax credits are the main way the marketplace makes coverage affordable. For the 2026 coverage year, credits are available if your household income falls between 100% and 400% of the federal poverty level. For a single person, that’s roughly $15,650 to $62,600; for a family of four, roughly $32,150 to $128,600.13HHS Office of the Assistant Secretary for Planning and Evaluation. 2025 Poverty Guidelines14Internal Revenue Service. Eligibility for the Premium Tax Credit
The credit is tied to the second-lowest-cost Silver plan in your area, called the benchmark plan. The marketplace calculates how much you’re expected to contribute toward that benchmark based on your income, on a sliding scale of roughly 2% to 10%, and the credit covers the difference.15Centers for Medicare & Medicaid Services. Plan Year 2025 Qualified Health Plan Choice and Premiums in HealthCare.gov States: Methodology You can apply the credit to any Bronze, Silver, Gold, or Platinum plan, not just the benchmark itself. After credits, the lowest-cost plan can run as little as $50 a month.16Centers for Medicare & Medicaid Services. Plan Year 2026 Marketplace Plans and Prices Fact Sheet
Most people take the credit in advance as a monthly premium reduction. You can also pay full price each month and claim the entire credit when you file taxes. Either way, you reconcile the amount at tax time based on your actual income.
The 2026 Subsidy Cliff
From 2021 through 2025, enhanced subsidies eliminated the 400% FPL income cap, so higher-income households could still qualify for some help. Congress did not extend those enhanced credits. For 2026, anyone earning above 400% of FPL is once again ineligible for premium tax credits. Land just above the line and you pay the full unsubsidized premium.
Cost-Sharing Reductions
Cost-sharing reductions are a separate form of help that lowers your deductible, copays, and coinsurance. Two conditions apply: your household income must be between 100% and 250% of the federal poverty level, and you must enroll in a Silver plan.6HealthCare.gov. Health Plan Categories: Bronze, Silver, Gold and Platinum
The lower your income, the more generous the reduction. At incomes up to 150% of FPL, a Silver plan with cost-sharing reductions covers roughly 94% of medical costs instead of the standard 70%, with an out-of-pocket maximum around $3,500 for an individual. Between 151% and 200% of FPL, the plan covers about 87%. Between 201% and 250%, the reduction is more modest, with an out-of-pocket cap around $8,450.
This is why Silver often beats Bronze on total cost for people who qualify. Choose Bronze, Gold, or Platinum instead and you lose the cost-sharing reduction entirely.
When Employer Coverage Blocks Subsidies
If your employer offers coverage that is both affordable and meets a minimum quality standard, you generally cannot get premium tax credits through the marketplace. For 2026, employer coverage is considered affordable if your share of the premium for self-only coverage is no more than 9.96% of household income. The plan must also meet minimum value, meaning it’s designed to cover at least 60% of typical medical costs and includes hospital and physician services.17Centers for Medicare & Medicaid Services. Common Complex Scenarios: Consumers Who Receive an Offer of Employer-Sponsored Coverage
Family members get a separate test. Before 2023, affordability was judged solely on employee-only coverage, which locked many families out of subsidies even when the family premium was unaffordable. A 2023 rule change, sometimes called the family glitch fix, bases the affordability test for spouses and dependents on the actual cost of family coverage. If family-tier premiums exceed 9.96% of household income, your family members can qualify for marketplace tax credits on their own even if you can’t.
Reporting Changes and Reconciling at Tax Time
Take advance credits and you have an ongoing obligation to report income and household changes as they happen. A raise, a job loss, a new baby, or a spouse gaining employer coverage can all change what you’re entitled to.18HealthCare.gov. Reporting Income, Household, and Other Changes
Failing to report an income increase gets expensive. If your advance credits turn out to be too large for your actual year-end income, you owe the excess back to the IRS. For 2026, there is no cap on that repayment. You repay every dollar of excess credit regardless of income.19Internal Revenue Service. Updates to Questions and Answers About the Premium Tax Credit
At tax time, the marketplace sends you Form 1095-A showing the credits paid on your behalf. You use it to complete IRS Form 8962 and attach that to your return. Reconciliation is required even if you wouldn’t otherwise need to file.20Internal Revenue Service. Premium Tax Credit: Claiming the Credit and Reconciling Advance Credit Payments Skip it and the IRS can delay your refund and block you from advance credits in future years.
If your income dropped during the year, reconciliation works the other direction: the IRS will increase your refund or reduce your tax bill by the additional credit you were entitled to but didn’t receive.
One Boundary Worth Knowing
The federal penalty for going without insurance has been zero since 2019.21Internal Revenue Service. Questions and Answers on the Individual Shared Responsibility Provision A handful of states and the District of Columbia have enacted their own mandates with penalties that still apply, so check your state’s tax guidance before assuming a gap is cost-free.
Getting Help
Navigators are federally funded, trained assistants who provide free help with marketplace enrollment. They can walk you through eligibility, compare plans, explain subsidy amounts, and complete your application with you. Navigators cannot charge you or steer you toward a particular insurer.22Centers for Medicare & Medicaid Services. In-Person Assistance in the Health Insurance Marketplaces
Licensed brokers and agents can also help. In the marketplace context, brokers are generally paid by insurers through commissions rather than directly by you. The distinction: navigators are prohibited from recommending one plan over another based on anything but your needs, while brokers may have financial relationships with specific insurers. Both beat decoding plan documents alone, especially if you’re enrolling for the first time or juggling employer coverage for one family member and marketplace coverage for others.