How Fair Market Rent (FMR) Works

What Is Fair Market Rent?

Every year, the U.S. Department of Housing and Urban Development (HUD) publishes Fair Market Rent (FMR) figures for every county and metropolitan area in the country. These numbers represent the estimated cost of renting a modest, decent-quality apartment, including utilities, in each area.

FMRs are not aspirational or idealized figures. They're calculated from actual rental market data and represent the 40th percentile of gross rents for standard-quality units. In practical terms, if you lined up every rental in an area from cheapest to most expensive, the FMR would fall at the point where 40% of rentals are cheaper.

HUD publishes FMRs for five unit sizes: studio (efficiency), one-bedroom, two-bedroom, three-bedroom, and four-bedroom. The two-bedroom FMR is the base from which other bedroom sizes are derived using established ratios. You can look up FMRs for any area on our county pages or metro area pages.

How HUD Calculates FMRs

The FMR calculation process combines several data sources and statistical methods:

Step 1, Base rent estimate. HUD starts with the American Community Survey (ACS), a large annual survey conducted by the Census Bureau. The ACS collects gross rent data (contract rent plus utilities) from a nationally representative sample of renter households. HUD uses 5-year ACS data for most areas, switching to 1-year ACS data for larger metro areas where sample sizes are sufficient.

Step 2, Local surveys. For some metro areas, HUD supplements ACS data with its own telephone-based Random Digit Dialing (RDD) surveys. These provide more recent, locally specific rent data that helps capture rapid market changes the ACS might miss.

Step 3, Inflation and trend adjustment. Because ACS data has a time lag (typically 1-2 years old by publication), HUD applies Consumer Price Index (CPI) rent components and local trend factors to project rents forward to the upcoming fiscal year. For FY 2026, published in late 2025, the base data might come from 2021-2023 ACS surveys, updated with more recent CPI trends.

Step 4, Quality filtering. HUD excludes public housing units, newly built units less than two years old, and substandard units from the calculation. This ensures FMRs reflect the cost of existing, standard-quality private-market rental housing.

Step 5, Percentile calculation. The final FMR is set at the 40th percentile of the adjusted gross rent distribution. Some areas designated as "50th percentile FMR areas" use the 50th percentile (median) instead, typically where the 40th percentile was found to limit housing choice for voucher holders.

Who Uses FMR Data?

Fair Market Rents are not just statistics, they directly determine funding and payment levels for several major federal housing programs:

• Housing Choice Voucher Program (Section 8). This is the largest use of FMRs. Public Housing Authorities (PHAs) use FMRs to set "payment standards" - the maximum subsidy a voucher holder can receive. PHAs can set their payment standard between 90% and 110% of the FMR (with HUD approval for amounts outside this range). Learn more in our Section 8 guide.
• HOME Investment Partnerships Program. FMRs help set maximum rent limits for HOME-funded rental units, ensuring federally assisted housing remains affordable.
• Emergency Solutions Grants (ESG). These grants for homeless prevention and rapid re-housing use FMRs to determine reasonable rent levels for assisted households.
• Continuum of Care (CoC) programs. Programs addressing homelessness use FMRs to set rent reasonableness standards for permanent supportive housing.
• Low-Income Housing Tax Credit (LIHTC). While LIHTC rents are primarily based on Area Median Income, FMRs serve as a reference point in certain calculations and market comparisons.

FMR vs. Actual Market Rent

One of the most common sources of confusion is the difference between Fair Market Rent and what you'll actually pay on the open market. They are not the same thing, and understanding why matters:

FMR is the 40th percentile, not the average. By definition, 60% of rentals in an area cost more than the FMR. The median (50th percentile) market rent is typically 10-20% higher than the FMR, and average rents can be even higher in areas with a wide spread of prices.

FMR excludes luxury and new construction. Units less than two years old and high-end units are filtered out. Listings on Zillow, Apartments.com, or Craigslist include all unit types, including premium properties that pull averages up.

FMR includes utilities. The FMR figure is a "gross rent" that includes the cost of tenant-paid utilities (electricity, gas, water). When comparing to a listing that quotes rent only, you need to add estimated utility costs to make an apples-to-apples comparison.

FMR uses lagged data. In rapidly appreciating markets, the FMR may significantly understate current rents because it's based on data that is 1-2 years old, even after trend adjustments. Conversely, in cooling markets, FMRs may overstate current rents.

For a real-world check, look up your county's FMR and compare it to current listings in your area. The gap tells you something about how tight or loose your local rental market is.

How FMRs Are Updated Each Year

HUD publishes new FMRs annually, typically in the fall for the upcoming fiscal year (which starts October 1). The timeline looks roughly like this:

• Spring: HUD collects and analyzes the latest ACS data and conducts any supplemental local surveys.
• Summer: Proposed FMRs are published in the Federal Register with a 30-day public comment period. PHAs, advocacy groups, and the public can submit comments challenging the proposed numbers for specific areas.
• Fall: Final FMRs are published, incorporating any adjustments from the comment period. These take effect October 1.
• Year-round: PHAs implement the new FMRs by adjusting their payment standards. Most PHAs phase in changes at voucher renewal rather than all at once.

Year-over-year changes can be significant. Between FY 2024 and FY 2025, some counties saw FMR increases of 10-15%, while others saw modest declines. These shifts reflect real changes in local housing markets, population movements, and construction activity. You can see year-over-year FMR changes on our rent growth rankings page.

Small Area Fair Market Rents (SAFMRs)

Standard FMRs are set at the metro area level, which means a single number covers an entire metropolitan statistical area (MSA). This creates a problem: within a large metro, rents can vary dramatically between neighborhoods. A metro-wide FMR might be too low for expensive neighborhoods and too high for cheaper ones.

To address this, HUD developed Small Area Fair Market Rents (SAFMRs), which are calculated at the zip-code level. SAFMRs allow voucher payment standards to vary within a metro area, giving voucher holders more purchasing power in higher-rent neighborhoods and better access to areas with good schools, jobs, and services.

As of 2026, HUD requires SAFMRs in 65 metro areas, the original 24 areas designated in 2018 plus 41 more added in an October 2024 expansion, where research showed significant intra-metro rent variation was limiting housing choice. Other PHAs can voluntarily opt into SAFMRs. The required SAFMR areas include large metros like Dallas, Chicago, and Pittsburgh.

Why FMR Matters to You

Even if you don't participate in any federal housing program, FMRs provide a valuable benchmark. They tell you what a moderate-cost rental looks like in your area, based on rigorous government data rather than self-reported listings or real estate marketing. Compare FMRs across states or between metro areas to get a data-driven picture of where renting is cheap and where it's expensive. If you're exploring affordable states, check our guide on the cheapest states to rent.

Frequently Asked Questions

What is Fair Market Rent (FMR)?

Fair Market Rent is an estimate published annually by HUD that represents the 40th percentile of gross rents (including utilities) for standard-quality rental units in a specific area. It means roughly 40% of an area's rentals cost less than the FMR.

How does HUD calculate Fair Market Rents?

HUD uses data from the American Community Survey (ACS), supplemented by local random digit dialing surveys. They calculate the 40th percentile of gross rents for standard-quality units, then apply inflation adjustments and trend factors to project the figure forward to the upcoming fiscal year.

Who uses Fair Market Rent data?

FMRs are primarily used by Public Housing Authorities to set payment standards for the Housing Choice Voucher (Section 8) program. They're also used by the HOME program, Emergency Solutions Grants, Continuum of Care programs, and LIHTC-funded developments.

Is Fair Market Rent the same as actual market rent?

No. FMR represents the 40th percentile of rents, not the average or median. In most areas, actual median market rent is higher than the FMR. Private listings on platforms like Zillow or Apartments.com may show significantly higher asking rents, especially for newer or renovated units.

What are Small Area Fair Market Rents (SAFMRs)?

Small Area FMRs are zip-code-level FMRs that provide more localized rent estimates. HUD requires certain metro areas with large rent variations to use SAFMRs instead of metro-wide FMRs, allowing voucher holders to access higher-rent neighborhoods within a metro area.