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Under current federal rules, young adults can usually stay on a parent’s health plan until they turn 26, whether or not they live at home, are married, or have a job of their own. Staying is simple, which is why many families default to it. Simple is not always cheapest, and it is worth running the comparison once, especially when the young adult lives in a different state from the parent.
What staying on the plan costs
If the parent’s plan is through an employer, adding or keeping an adult child usually sits inside a family premium. The parent may already be paying that family rate for younger siblings, in which case the adult child’s coverage effectively adds nothing. If the adult child is the only dependent, the jump from employee-only or employee-plus-spouse pricing to family pricing can be substantial, and some employers charge separately for each dependent.
Ask whoever handles benefits at the parent’s job for the actual payroll cost of each tier. Families often discover the adult child’s share is larger than a subsidized marketplace premium would be, or much smaller. There is no way to know without the tier prices. Our guide to health insurance options for young adults in their 20s lays out the alternatives side by side.
The network problem
The strongest argument against staying on a parent’s plan is geography. A plan built around providers near the parent’s home may have a thin network, or none, in the city where the young adult lives and works. Routine care far from the network means out-of-network prices or travel back home for appointments. Emergency care is treated more generously, but most health care is not emergency care.
Check the plan’s provider directory using the young adult’s address, not the parent’s. If regular doctors, urgent care, and a hospital are in network nearby, the plan travels well. If not, price an individual plan where they actually live, starting with what health insurance costs per month and the marketplace options for their income.
Your own employer plan and marketplace options
A young adult with a job that offers coverage should compare that offer too. One catch: being eligible to stay on a parent’s plan does not block marketplace subsidies by itself, but having an affordable offer of employer coverage of your own can. The rules turn on the details of each offer, so check eligibility on the marketplace application rather than assuming.
Also note that a parent’s plan can cover a young adult’s spouse or children only if the plan chooses to. Most employer plans do not extend that far, so a young family usually needs its own coverage for the partner and baby.
The birthday deadline
Coverage on a parent’s plan typically ends at the end of the month in which the young adult turns 26, though plan details vary. Losing that coverage counts as a qualifying life event, which opens a special enrollment period for a marketplace or employer plan. Do not wait until coverage has already ended to shop. Line up the new plan in advance so there is no gap, and read our explainer on qualifying life events and special enrollment for how those windows work.
