Medicaid Income Limits by Household Size

Medicaid eligibility is determined in large part by household income measured against federal poverty guidelines, and the income threshold shifts depending on how many people live in the household. This page explains how those limits are calculated, which federal standards govern them, how eligibility categories differ across population groups, and where the key decision boundaries fall. Understanding these limits is foundational to navigating the broader Medicaid program landscape.

Definition and scope

Medicaid income limits define the maximum countable household income a family or individual may have and still qualify for Medicaid coverage. These limits are expressed as a percentage of the Federal Poverty Level (FPL), a figure the U.S. Department of Health and Human Services (HHS) updates annually (HHS Poverty Guidelines, 2024). The specific percentage threshold varies by eligibility category — such as children, pregnant individuals, parents, and adults without dependents — and also by state, because states retain authority to set limits above the federal minimum.

The Affordable Care Act (ACA), enacted in 2010 and codified in part at 42 U.S.C. § 1396a, established a uniform income counting methodology called Modified Adjusted Gross Income (MAGI). MAGI replaced the earlier net income calculation for most non-elderly, non-disabled Medicaid applicants. For elderly and disabled populations, a separate set of financial rules applies, incorporating asset tests and different income disregards under the traditional Medicaid framework.

Household size under MAGI rules follows Internal Revenue Service tax filing unit definitions, which means the counted household may differ from the people physically living at the same address. A pregnant person, for example, counts as two household members for purposes of the income calculation, even though only one person is enrolling.

How it works

Income eligibility is determined through a four-step process:

1. Identify the applicable eligibility category — Children, pregnant individuals, parents/caretakers, and expansion adults each have separate FPL thresholds. The applicable category dictates which income limit applies.
2. Determine household size — Under MAGI rules, household composition follows IRS tax dependency rules. Each additional household member raises the FPL dollar amount because poverty guidelines are structured as a base figure plus an increment per person.
3. Calculate countable income — MAGI-based income includes wages, salaries, self-employment income, taxable Social Security benefits, and certain other income types. Non-taxable income such as child support received is excluded.
4. Compare to the FPL threshold — The household's monthly or annual countable income is expressed as a percentage of the FPL for that household size. If it falls at or below the applicable threshold, the financial test is met.

For 2024, the continental U.S. FPL baseline for a single-person household is $15,060 per year (HHS Poverty Guidelines, 2024). Each additional household member adds $5,380 to that figure. Alaska and Hawaii maintain separate, higher FPL schedules by federal statute.

The mandatory minimum income thresholds established by federal law require states to cover children up to at least 100% FPL and pregnant individuals up to at least 133% FPL (42 U.S.C. § 1396a). States that accepted ACA Medicaid expansion cover adults aged 19–64 up to 138% FPL, which incorporates a 5 percentage point income disregard applied automatically under MAGI rules.

Common scenarios

Children in a family of four: A family of four with a gross annual income of $52,000 falls at approximately 191% FPL (based on 2024 guidelines). In most states, children in that household qualify for Medicaid because the median state threshold for children is at or above 200% FPL, and 35 states cover children to at least that level (Medicaid and CHIP Payment and Access Commission, MACPAC).

Pregnant individuals: The majority of states extend coverage to pregnant individuals above the standard adult threshold. Because pregnancy adds one to the household count, a pregnant individual living alone is treated as a two-person household, raising the applicable FPL dollar amount before any percentage threshold is applied.

Expansion adults without dependents: In the 41 states (including Washington D.C.) that had adopted Medicaid expansion as of 2024 (KFF State Health Facts), non-disabled adults aged 19–64 without dependent children qualify up to 138% FPL. In non-expansion states, this group typically has no Medicaid pathway regardless of income.

Elderly and disabled individuals: Social Security Income (SSI) recipients in most states are automatically deemed eligible. For others in this category, asset limits — typically $2,000 for an individual under traditional Medicaid rules — apply alongside income tests, distinct from the MAGI methodology used for other groups.

Decision boundaries

The most consequential eligibility boundary is the 138% FPL threshold for expansion adults, because it determines whether an adult without dependents has any Medicaid access at all in their state. Below that line in expansion states, Medicaid applies. Above it, marketplace coverage becomes the primary alternative.

Two methodological distinctions affect where an applicant falls relative to these boundaries:

• MAGI vs. non-MAGI: Elderly individuals (65+), people receiving SSI, and individuals who are blind or have a disability are evaluated under non-MAGI rules, which count different income types and impose asset limits. MAGI rules apply to all other applicants.
• State optional expansions: States may exceed federal minimums. For example, states covering children to 300% FPL maintain a threshold more than three times the federal floor for that group. An applicant over the federal minimum but under the state-adopted threshold remains eligible in that state.

The key dimensions and scopes of Medicaid page provides further context on how these eligibility categories interact with coverage types and benefit structures across the program's full scope. Applicants uncertain about which category applies to their household can find navigation guidance through how to get help for Medicaid resources.