Medicaid defines your household by who lives with you and who you claim as dependents on your taxes
Medicaid uses the term household to mean the people living in your home who are related to you by blood, marriage, or adoption, plus anyone you claim as a dependent on your federal tax return. The state you live in may add or subtract from this definition slightly, but the core rule is the same: Medicaid looks at who shares your address and your finances.
Your household size matters because it determines your income limit. A single person has a lower income threshold than a family of four. If you undercount or overcount who lives with you, you may be told you earn too much when you actually don't, or vice versa. Getting this right at the start saves you from having to reapply later.
Key Takeaways
- Your household includes everyone living in your home who is related to you by blood, marriage, or adoption, and anyone you claim as a dependent on your tax return.
- A spouse living with you is always part of your household, even if you file taxes separately.
- Adult children, parents, and siblings living with you count as household members only if you claim them as dependents on your taxes.
- Foster children and stepchildren living with you count as household members; roommates and unrelated people do not.
- Your state Medicaid office can clarify your household size before you submit your information, so call if you are unsure.
Spouses and partners living with you
A spouse living in your home is always part of your household for Medicaid, regardless of whether you file taxes jointly or separately. If you are married and live together, Medicaid counts both of you as one household unit, and your combined income is used to determine whether either of you meets the income limit.
If you are in a domestic partnership or civil union recognized by your state, the rules vary. Some states treat registered domestic partners the same as spouses; others do not. Call your state Medicaid office to ask how they count your partner. If you are unmarried and living together but not in a registered partnership, your partner is not part of your household for Medicaid purposes, even if you share finances.
Children living in your home
Biological children, adopted children, and stepchildren living with you are part of your household. Foster children living with you also count as household members. You do not need to claim them on your tax return for Medicaid to count them — the rule is based on who lives in the home, not tax filing.
Adult children (age 19 and older) living with you count as household members only if you claim them as dependents on your federal tax return. If an adult child lives with you but you do not claim them as a dependent — for example, because they work and claim themselves — they are not part of your household for Medicaid. The same rule applies to grandchildren, nieces, nephews, and other relatives living with you.
Parents, siblings, and other relatives
Your parents, siblings, and other relatives living with you count as household members only if you claim them as dependents on your federal tax return. If your mother lives with you and you claim her as a dependent, she is part of your household. If she lives with you but claims herself on her own tax return, she is not.
This rule can be confusing when multiple people in a home could claim the same dependent. For example, if your parent lives with you and your sibling, only one of you can claim them on your taxes. Whoever claims them is the one whose household includes them for Medicaid purposes. If neither of you claims them, they are not part of either household.
People who do not count as household members
Roommates, boarders, and unrelated people living in your home do not count as household members, even if they share expenses or have lived with you for years. Friends, romantic partners you are not married to, and people renting a room from you are not included in your household size.
Relatives who live outside your home do not count, even if you support them financially. If your adult child lives in another state or your sibling lives across town, they are not part of your household, regardless of how much money you send them each month.
How to report your household to Medicaid
When you submit your Medicaid information, you will be asked to list every person in your household by name, date of birth, and relationship to you. You will also report your household's total monthly income. If you are unsure whether someone should be counted, write down their name and relationship, and ask the Medicaid office to clarify before you submit.
If your household changes — someone moves in or out, you get married, or a child turns 19 — tell your Medicaid office within 30 days. Changes in household size can affect your income limit and your coverage. Some states allow you to report changes online; others require a phone call or a form. Check your state's Medicaid website to find the fastest way to report.
Household size and income limits
Each state sets its own income limit for Medicaid, and the limit depends on your household size. A household of one has a lower limit than a household of four. If you miscount your household, you may be denied coverage or told to reapply with the correct information.
For example, if you live alone and earn $1,500 per month, you might be within the limit. But if you have an adult child living with you whom you claim as a dependent, your household size is two, and your combined income is what matters. If your child also earns money, the total household income might exceed the limit even though your individual income does not.
Frequently Asked Questions
Does my spouse's income count if we are separated but still married?
Yes. Medicaid counts you as a household with your spouse as long as you are legally married, even if you live apart. If you are in the process of divorcing, tell your Medicaid office — the rules may change once the divorce is final. Some states have different rules for spouses who are legally separated, so ask your state office.
If my adult child lives with me but works and claims themselves on taxes, do they count?
No. If you do not claim them as a dependent on your tax return, they are not part of your household for Medicaid. Their income does not affect your may be able to access, and they would need to apply for Medicaid separately based on their own income.
What if I am not sure whether I should claim someone as a dependent?
The IRS rules for claiming dependents are separate from Medicaid's household rules, but they overlap. If you are unsure, ask your tax preparer or the IRS first, then tell your Medicaid office what you decided. Medicaid will use your actual tax return to verify your household.
Does my household size change if someone is in the hospital or temporarily away?
No. If someone lives with you as their permanent address, they count as part of your household even if they are away for a few weeks or months. If they move out permanently, that is when you report the change to Medicaid.
Can I have two separate households if I live in two places?
No. Medicaid considers your primary residence — where you spend most of your time and receive mail — as your household location. If you split time between two homes, you have one household, not two. Tell your Medicaid office which address is your main residence.