Household

Your household, for Marketplace insurance purposes, is the group of people you include on your federal tax return, either as the filer, spouse, or dependents. This is important because your household size and combined household income determine whether you qualify for premium tax credits and cost-sharing reductions.

Your Marketplace household typically includes you, your spouse (if you file jointly), and anyone you claim as a tax dependent, usually your children under 26 or other qualifying relatives. It doesn't matter whether everyone in the household needs health insurance; what matters is who's on the tax return.

Here's where it gets nuanced: your "household" for the Marketplace isn't always the same as who lives in your home. A roommate who files their own taxes is not in your household. An adult child you still claim as a dependent is in your household even if they live somewhere else. If you're divorced, only the children you claim on your taxes count toward your household.

Your household size directly affects your federal poverty level calculation, which drives subsidy eligibility. For example, a household of three at $60,000 income falls at a different FPL percentage than a household of two at the same income, and that can mean the difference between qualifying for subsidies or not.

Getting your household size right on your Marketplace application is essential. If it's wrong, your subsidy estimate will be off, and you'll have to reconcile the difference at tax time. If your household changes mid-year (new baby, marriage, divorce), update your application.