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Enrolling in a health plan on Healthcare.gov takes most people under an hour, but the application asks for a lot of detail, and getting a number wrong can cost you subsidies or delay your coverage. Here is the process in order, with what to have ready at each step.
Before you start: gather your documents
Have these on hand before you create your account. It saves you from logging out halfway through to dig through a filing cabinet:
- Social Security numbers for everyone applying for coverage
- Birth dates and home addresses for each applicant
- Your best estimate of household income for the coverage year (pay stubs, W-2s, or last year’s tax return help)
- Immigration documents, if anyone applying is not a US citizen
- Policy numbers for any current health coverage
- Information about job-based coverage available to you or your family, even if you have not enrolled in it
If your employer offers coverage, ask HR to complete the Employer Coverage Tool from Healthcare.gov. The application asks for specifics about that offer, and guessing wrong can wrongly disqualify you from subsidies.
Step 1: create your account
Go to Healthcare.gov and create an account with your email address. If you enrolled in a previous year, log in with your existing account rather than starting fresh; your old application is still there and can be renewed. If your state runs its own marketplace, like California’s Covered California or New York State of Health, enroll there instead. Healthcare.gov will redirect you automatically when you enter your ZIP code.
Step 2: fill out the application
The application asks about your household, income, and current coverage. Answer for the coverage year, not last year. If your income is hard to predict, report what you earn now and update the application when it changes. Count wages, tips, net self-employment income, unemployment, and Social Security. Do not count child support, gifts, or veterans’ disability payments.
Be precise about who is in your tax household, because subsidies follow the tax return. Include your spouse and anyone you will claim as a dependent who must file a tax return.
Step 3: review your eligibility results
Submit the application and you get eligibility results immediately. The results tell you whether you qualify for a premium tax credit, cost-sharing reductions, Medicaid, or CHIP. If the marketplace cannot verify something, like your income, you will get a notice asking for documents, with a deadline. Respond by the deadline. Missing it can end your coverage or your subsidies.
Step 4: compare plans
This is where most people either save money or leave it on the table. Do not sort by premium alone. Check the deductible, the out-of-pocket maximum, and whether your doctors and prescriptions are covered. If your income is between 100% and 250% of the poverty level, look at Silver plans first, because only Silver plans carry cost-sharing reductions. Our open enrollment checklist covers the 12 things worth reviewing before you commit.
Step 5: enroll and pay your first premium
Choose your plan and enroll. Then pay the first month’s premium directly to the insurance company, not to Healthcare.gov. Coverage does not start until that first payment clears. For 2027 coverage, enroll by December 15, 2026 for a January 1 start; enroll between December 16 and January 15 and coverage starts February 1. The full deadline picture is in our open enrollment 2027 dates guide.
After you enroll
Two things keep your coverage working through the year. First, report life changes within 30 days: income shifts, moves, marriages, births. Your subsidy is calculated from your estimated income, and the IRS reconciles it at tax time, so stale information turns into a surprise bill. Second, if you think you might qualify for subsidies, enroll through the marketplace rather than buying the same plan directly from the insurer. The plan may look identical, but the tax credit only exists on the marketplace side, as our off-exchange buying guide explains.
The whole process rewards preparation. An hour with your documents ready beats three evenings of half-finished applications.
