What is Fair Market Rent? How HUD sets FMR, who uses it, and what it doesn't mean

Definition

Fair Market Rent (FMR) is the U.S. Department of Housing and Urban Development's estimate of the 40th-percentile gross rent for standard-quality rental units in a metropolitan area or non-metro county — the rent below which 40% of recently rented units fall. "Gross" means rent plus tenant-paid utilities except telephone, cable and internet. HUD publishes one figure per bedroom count (studio through four bedrooms) and resets them each fiscal year on October 1.

How HUD calculates it

HUD starts from American Community Survey estimates of gross rent, adjusts toward recent movers, and trends the figure forward with inflation data and forecasts, with a state minimum so rural counties are not set below the state's non-metro floor. Qualifying local rent surveys may replace the ACS-based estimate where an area requests one.

Small Area FMRs

In metros where rents vary sharply between neighborhoods, HUD publishes Small Area FMRs by ZIP code. Housing authorities in designated metros must use them; elsewhere they may opt in. The effect is that a voucher pays more in a high-rent ZIP and less in a low-rent one, instead of one metro-wide number that only worked in cheaper neighborhoods.

Who uses FMR

Housing Choice Vouchers (Section 8): the housing authority's payment standard is 90–110% of FMR (or SAFMR). Details.
HOME and several other HUD programs reference FMR for rent limits (LIHTC uses HUD's separate MTSP income limits).
Project-based Section 8, HUD-VASH, Emergency Housing Vouchers, and many state and local rental-assistance programs.
Court and relocation formulas: several states use FMR to set relocation assistance or "reasonable rent" in disputes.

What FMR is not

It is not a rent-control ceiling for private landlords, not the average rent (the 40th percentile sits below the median), and not what a voucher pays — that is the payment standard minus the tenant's share. A landlord can charge above FMR; a voucher tenant then pays the gap, up to 40% of income at lease-up.