Your Medi-Cal household size is usually built from your federal tax return: you, your spouse if you live together, and everyone you claim as a dependent. That count sets the income limit your application is measured against, so getting it right matters. A larger household means a higher dollar cutoff, and one person can be the difference between qualifying and being denied.
Most applicants fall under Modified Adjusted Gross Income (MAGI) rules, which tie household composition to tax filing status rather than simply counting who sleeps under your roof. The rules shift for people who don’t file taxes, for children in split or blended situations, and for pregnant applicants. Below is how each of those works.
Who Counts in Your Medi-Cal Household
If you file a federal tax return and no one else claims you as a dependent, your household is you plus every person you claim as a dependent.1eCFR. 42 CFR 435.603 – Application of Modified Adjusted Gross Income (MAGI) Where those dependents physically live does not matter. A child away at college or a spouse working in another city still counts if they appear on your return.
If someone else claims you as a dependent, your household is generally the same as that tax filer’s household. A college student claimed on a parent’s return belongs to the parent’s household for Medi-Cal, and that household size includes the parents plus every other dependent on the return.
Married Couples Living Together
Spouses who live together are always in each other’s household, whether they file jointly or separately.1eCFR. 42 CFR 435.603 – Application of Modified Adjusted Gross Income (MAGI) Filing separately does not shrink your household or hide your spouse’s income. This is where people trip up: separate returns while sharing a home might make sense for other tax reasons, but Medi-Cal still combines both incomes against the same threshold. Married couples who live apart and file separately are treated as separate households.
If You Don’t File Taxes
When you neither file a return nor get claimed on one, Medi-Cal looks at who actually lives with you. For an adult 19 or older, the household includes you, your legal spouse if you live together, and your children under 19 who live in your home. California extends that age to under 21 for full-time students.2California Department of Health Care Services. DHCS Guide for Calculating MAGI Medi-Cal Individual Household Size Natural, adopted, and stepchildren all count.
For a non-filer under 19 (or under 21 as a full-time student), the household is the individual plus parents and siblings living in the same home, with the same age limits applied to siblings.
Roommates, unmarried partners, and other unrelated adults in your home are not part of your household. Their income does not count against you, and they do not increase your household size.
Special Rules for Children
Children in split-custody or blended situations get protection through three exceptions to the tax-filer rule. In each case, Medi-Cal uses the non-filer rules to build the child’s household, based on who actually lives in the home:1eCFR. 42 CFR 435.603 – Application of Modified Adjusted Gross Income (MAGI)
- A non-custodial parent claims the child as a dependent. The child’s household is built around the parent they live with, not the parent who claims them.
- The child lives with both parents, and the parents file separately. The child’s household includes the child, both parents, and any qualifying siblings in the home.
- A non-parent (grandparent, aunt, other relative) claims the child. The child’s household is based on who lives with them, not on the tax return.
These exceptions keep children from losing coverage because of how adults arrange their taxes.
Full-Time Students
California’s age cutoff for children in MAGI household rules is 19, extended to 21 for full-time students.2California Department of Health Care Services. DHCS Guide for Calculating MAGI Medi-Cal Individual Household Size A 20-year-old enrolled full time still counts in a parent’s household under non-filer rules. Under tax-filer rules, a student stays in the household of whoever claims them, regardless of age or student status.
Foster Youth
Foster children are not folded into their foster parents’ household. California’s Former Foster Youth program covers young adults up to age 26 who were in foster care at age 18 or older, and that eligibility is individual rather than household-based.
Pregnancy and Household Size
A pregnant applicant counts as herself plus the number of babies expected. One pregnancy adds one; twins add two.2California Department of Health Care Services. DHCS Guide for Calculating MAGI Medi-Cal Individual Household Size The bump lasts throughout the pregnancy and often pulls applicants below the income threshold who would not otherwise qualify.
Expected children also raise the household size used to evaluate everyone else in the pregnant person’s household, not just the pregnant applicant.3Department of Health Care Services. Medi-Cal Access Program – Who Qualifies for MCAP Pregnant applicants also have higher income limits: 213% of FPL for full-scope Medi-Cal, and up to 322% of FPL under the Medi-Cal Access Program.
How Household Size Sets Your Income Limit
Medi-Cal compares your household income to the Federal Poverty Level (FPL) for your household size. The percentage of FPL you have to fall under depends on who you are. For adults 19 through 64, it’s 138%. For children under 19, it’s 266%. For pregnant applicants, it’s 213% for full-scope coverage.
The 2026 FPL figures for the 48 contiguous states:
- 1 person: $15,960
- 2 people: $21,640
- 3 people: $27,320
- 4 people: $33,000
- 5 people: $38,680
- 6 people: $44,360
- 7 people: $50,040
- 8 people: $55,720
Each additional person adds $5,680.4U.S. Department of Health and Human Services. 2026 Poverty Guidelines
What that looks like in practice: a single adult at 138% of FPL qualifies at roughly $22,025 a year. A family of four qualifies at about $45,540. Add one more person and the limit rises to about $53,378. A pregnant applicant counted as a household of two hits 213% of FPL at roughly $46,093.
When Different Rules Apply
MAGI rules do not govern every Medi-Cal application. If you are 65 or older, blind, or disabled, you may be evaluated under non-MAGI programs with different household calculations and asset limits that MAGI Medi-Cal does not use. Under non-MAGI methodology, the household concept centers on whose income and resources are legally attributed to you rather than on who lives with you, and a county eligibility worker can walk through the specific rules for your program category.
Reporting Household Changes
Report any change to your household within 10 days. Births, marriages, divorces, a dependent moving out, or a new person moving in all qualify.5Department of Health Care Services. Update Your Information Miss that window and you may face an overpayment the county will recoup, or a coverage gap you did not expect.
You can report through the BenefitsCal online portal, through Covered California if you originally enrolled there, by mailing an MC 210 RV form to your county office, or by calling your county health department. Whichever route you take, keep the confirmation or a copy. If a dispute comes up later about when you reported, that record is what protects you.