The same address that keeps your housing and meal stipends tax-free is usually the state where you buy health insurance. Get it right once and both work. Get it wrong and you can lose both.
Your tax home is your regular place of business or, for travelers, the permanent residence you maintain and return to. Travel stipends are generally tax-free only if you are working away from a tax home and paying duplicate living costs. For health insurance, you buy coverage in the state where you live, which for most travelers is that same home. Keep the two consistent and choose a plan whose network works where you take contracts.
The IRS treats an assignment at one location as temporary when it is realistically expected to last a year or less. Work at one location expected to run longer than a year is indefinite, and that location can become your tax home. Travelers with no regular home they maintain are treated as itinerant, with no tax-free travel expenses at all. This is a tax question first, so confirm your situation with a tax preparer who works with travelers.
Marketplace plans are certified by service area, and most are HMOs or EPOs built around that area's hospitals. A Robert Wood Johnson Foundation review of 2025 plans found PPOs were only about 14% of Marketplace plans, and 37% of Americans lived in a state with none. For a traveler, that means a plan bought at home can treat your entire 13-week assignment as out of network for anything short of an emergency.
Options that hold up on assignment:
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Usually the state of their permanent residence, which for most travelers is also their tax home. Plans are sold by state and service area, even though you work elsewhere.
On Marketplace and other ACA-compliant plans, emergencies are covered anywhere. Routine care depends on the network: many Marketplace HMOs and EPOs pay nothing out of area, while plans on national PPO networks have in-network providers across the country.
Generally no. The IRS treats travelers without a tax home as itinerant, and travel expenses are only tax-free when you are away from a tax home. Talk to a tax preparer who works with travelers.
Checked October 14, 2026. Rules and dates change; confirm before you act.
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