Open enrollment for 2026 marketplace coverage follows the familiar federal schedule: November 1, 2025 through January 15, 2026, with coverage starting January 1 for anyone who enrolls by mid-December. That enrollment window applies on HealthCare.gov, which serves most states, while the states running their own exchanges — including California, New York, Colorado, and about a dozen others — set their own but generally similar deadlines. If you miss open enrollment, you can only sign up mid-year through a special enrollment period triggered by a qualifying life event such as losing job-based coverage, getting married, or having a child. Mark the deadline now, because 2026 is a year when renewing your plan without comparing could cost you real money.

The biggest 2026 change is on the subsidy side. The enhanced premium tax credits introduced by the American Rescue Plan and extended through 2025 expired at the end of 2025, which means many marketplace enrollees face higher net premiums for 2026 than they paid in 2025. The underlying premium tax credit structure from the Affordable Care Act remains in place, so lower-income households still get substantial help, but the expanded eligibility and lower contribution caps that made coverage nearly free for many people are gone. Insurers also filed some of the largest requested rate increases in years for 2026, with a median proposed increase in the high teens, so even subsidized shoppers will see higher sticker prices. The practical consequence: shopping around matters more in 2026 than in any recent year.

Marketplace plans are organized into metal tiers that describe cost-sharing, not quality of care. Bronze plans have the lowest monthly premiums but the highest out-of-pocket costs when you get care, with deductibles that can exceed $7,000 for an individual. Silver plans strike the middle ground and are the benchmark tier — premium tax credits are calculated against the second-lowest-cost Silver plan, and cost-sharing reductions that lower deductibles and copays are available only on Silver plans for qualifying incomes. Gold plans carry higher premiums but lower deductibles and copays, making them attractive if you expect significant medical care. Platinum plans, offered in limited areas, have the highest premiums and the lowest cost-sharing. Catastrophic plans are restricted to people under 30 or those with hardship exemptions and offer minimal coverage.

Choosing a tier starts with honest math about your expected care. If you are young, healthy, and rarely see a doctor, a Bronze plan paired with a health savings account (if the plan is HSA-eligible) can be the most economical choice, since you pay less each month and self-insure the small risk. If your household income qualifies you for cost-sharing reductions — generally up to 250% of the federal poverty level — a Silver plan is almost always the best value, because the reductions can make a Silver plan behave like a Gold or Platinum plan at a Silver price. If you take expensive prescriptions, manage a chronic condition, or expect surgery in 2026, a Gold plan's higher premium often pays for itself through much lower per-visit costs. Run each candidate plan through the marketplace's total-cost estimator with your actual doctors and drugs, not just the premium.

Network and formulary details decide whether a cheap plan is actually usable, and these change every year even when the plan name stays the same. A 2026 plan from the same insurer you had in 2025 may have dropped your hospital, switched pharmacy benefit managers, or moved your prescriptions to a higher cost tier. Before enrolling, verify that your primary care doctor, specialists, and preferred hospital are in-network for the specific 2026 plan — not just the insurer generally. Check the drug formulary for each prescription you take, noting the tier and any prior authorization or step-therapy requirements. Also confirm whether the plan covers your medications through a specialty pharmacy with different cost-sharing, since specialty drugs are where surprise bills most often appear.

When you are ready to enroll, start at HealthCare.gov or your state exchange and complete the income section carefully, because your subsidy estimate depends on your projected 2026 household income. Self-employed and gig workers should estimate conservatively and update the exchange promptly if income changes, since underestimating income can mean repaying excess advance credits at tax time. Compare at least three plans using the total estimated yearly cost, which combines premiums and expected out-of-pocket spending, rather than the premium alone. If you are auto-renewed, do not assume the renewal is your best option — insurers change networks and drug coverage annually, and the plan that was cheapest in 2025 may not be in 2026. Complete enrollment before the December deadline for January 1 coverage, and save your enrollment confirmation and 1095-A form for tax filing.