Federal Medical Assistance Percentages

Federal Medical Assistance Percentages (FMAP) are the percentage rates used to determine the matching funds rate allocated annually to certain medical and social service programs in the United States of America. FMAP eligible programs are joint federal-state partnerships between the federal government of the United States and state governments, which are administered by the states.[1][2] Thus, FMAP is an example of administration of federal assistance in the United States.

Funds that are eligible for FMAP match include Medicaid, State Children's Health Insurance Program (SCHIP) expenditures, Temporary Assistance for Needy Families (TANF) Contingency Funds, the Federal share of Child Support Enforcement collections, and Child Care Mandatory and Matching Funds of the Child Care and Development Fund.[3]

State governments use FMAP percentages to determine the federal government's contribution to specific state administered programs and assess their related budgetary outlays. For example, the 2006-2007 FMAP rate for California was 50% - therefore, for every dollar that California contributed to an eligible social or medical program between 2006 and 2007, the federal government also contributed one dollar.[4]


Pursuant to Section 1905(b) of the Social Security Act, the Secretary of Health and Human Services calculates the Federal Medical Assistance Percentages each year. This calculation is based upon a formula which compares individual state income to the continental United States income in order to determine ratios the federal government will utilize in assisting each state under the Act. This section also provides that no state's ratio will go lower than 50% or higher than 83%.

The guidelines for calculating the FMAP are outlined in the Social Security Act and they exclusively determine the ratio of matching funds for each state's Medicaid program. Section 2105(b)of the Act stipulate that "Enhanced Federal Medical Assistance Percentages," or Enhanced FMAPs, will be calculated at the same time as the FMAPs. Enhanced FMAPs provide ratios for states to follow in funding their State Children's Health Insurance Program, or SCHIP.


  1. "Medicaid Home - Medicaid.gov". hhs.gov.
  2. ACF Office of Public Affairs (OPA): Fact Sheet - Office of Family Assistance (TANF)
  3. http://a257.g.akamaitech.net/7/257/2422/01jan20051800/edocket.access.gpo.gov/2005/pdf/05-23392.pdf
  4. Medicaid
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