Published May 19, 2025
Fair Market Rent Explained: How HUD Sets Rental Benchmarks
Fair Market Rent is the single most important number in American rental housing policy. Set annually by the Department of Housing and Urban Development for every county and metro area in the country, FMR determines how much housing voucher holders receive, who qualifies for assistance, and how affordable a market truly is.
What Fair Market Rent Actually Measures
Fair Market Rent represents the 40th percentile of gross rents paid by recent movers in a given area. This means that 40% of standard-quality rental units in an area rent at or below the FMR. HUD chose the 40th percentile rather than the median because it targets moderately priced housing rather than the average of all units. The goal is to give voucher holders access to a reasonable range of housing without paying for luxury units.
"Gross rent" in the FMR calculation includes both the contract rent (what you pay the landlord) and an estimate of tenant-paid utilities. This is important because two apartments with the same listed rent can have very different total costs depending on whether utilities are included. HUD accounts for this by adding utility allowances to the calculation.
How HUD Calculates FMR
The FMR calculation starts with American Community Survey data from the Census Bureau, which provides baseline rent distributions for every area. HUD then adjusts these estimates forward using Consumer Price Index rent data and local rent surveys. The result is a set of FMR values for each bedroom size (efficiency through 4-bedroom) in each Fair Market Rent Area.
Fair Market Rent Areas generally correspond to metropolitan statistical areas (MSAs) for urban counties and individual counties for rural areas. This means that FMR is the same across an entire metro area, a renter in suburban Cook County pays the same FMR as one in downtown Chicago. HUD has created Small Area FMRs for some metro areas to address this limitation, setting rates at the ZIP code level instead.
Explore FMR data for any county on our county rankings or search for a specific county using our homepage search tool.
Why FMR Matters Beyond Vouchers
While FMR is most directly used to set Section 8 Housing Choice Voucher payment standards, its influence extends much further. HUD's FMR data is used by state and local housing agencies to set income limits for housing programs, by tax credit developers to determine maximum rents in Low-Income Housing Tax Credit (LIHTC) properties, and by researchers to measure housing affordability.
FMR also serves as a benchmark for the broader rental market. When FMR rises sharply in an area, it signals that the entire market is tightening. Our biggest rent increase ranking tracks which counties are seeing the fastest FMR growth.
Limitations of Fair Market Rent
FMR has important limitations that renters should understand. Because it represents the 40th percentile, it understates the rent most renters actually pay. In tight markets with low vacancy rates, finding a unit at or below FMR can be extremely difficult. Voucher holders in competitive markets like San Francisco and New York often cannot find landlords willing to rent at FMR levels.
FMR is also set at the metro area level, which masks wide variation within a metro. In a large metro like Los Angeles, FMR is the same whether you are looking in expensive Santa Monica or more affordable Palmdale. Small Area FMRs address this problem but are only available in select metro areas.
For a deeper comparison of FMR versus actual market rents, check our most expensive counties ranking to see where market rents are furthest above FMR levels.
How to Look Up FMR for Your Area
You can look up Fair Market Rent for any US county on RentIndex. Search for your county on our homepage or browse by state. Each county page shows FMR for all bedroom sizes (studio through 4-bedroom), year-over-year changes, rent burden estimates, and comparisons to neighboring counties. You can also compare two counties side by side using our comparison tool.
Frequently Asked Questions
Fair Market Rent (FMR) is the amount HUD determines is needed to rent a moderately priced unit in a specific area. It is set at the 40th percentile of gross rents for standard-quality units, meaning 40% of rental units in the area rent at or below the FMR. FMR includes the cost of shelter and utilities.
HUD publishes updated Fair Market Rents annually, typically in the fall for the upcoming fiscal year (October 1 - September 30). The data is based on American Community Survey estimates updated with Consumer Price Index rent changes and local market surveys.
Fair Market Rent directly determines Section 8 Housing Choice Voucher payment standards, income limits for housing programs, and eligibility thresholds for rental assistance. Even renters not using vouchers are affected because FMR reflects the broader rental market.
No. Fair Market Rent is set at the 40th percentile of rents, while median rent is the 50th percentile. FMR is typically 5-15% lower than median rent in most markets. FMR also includes utility costs, while reported median rents often do not.