HUD Has Cut the Weight of Private Rent Data in Its Voucher Formula From About 64% to About 55%

HUD filed its Fair Market Rents for fiscal year 2027 on August 31. They are scheduled for publication in the Federal Register on September 1, 2026, and take effect on October 1, 2026 unless HUD receives a valid request to reevaluate a particular area.

Fair Market Rents are not advice to renters and not a cap on what a landlord may charge. They are an administrative number that sets how far federal housing money goes. The notice lists eight uses, among them housing choice voucher payment standards, renewal funding calculations, project-based Section 8 contracts and public housing flat rents.

How an FMR is built

HUD targets the 40th percentile gross rent paid by recent movers into standard-quality units in an area. Gross rent means rent plus tenant-paid utilities. Getting to a forward-looking number takes three steps.

1. A base rent from the Census Bureau's five-year American Community Survey, this year covering 2020 through 2024.
2. A recent-mover factor from the 2024 one-year ACS, which captures households that moved within roughly the last eleven months — closer to what a new tenant would be asked to pay than the survey's stock of sitting tenants.
3. An inflation and trend step that carries the figure forward from 2025 to fiscal 2027 using time-series models.

The change is in step three

That inflation step blends two very different measurements of rent. One is private listings and transaction data from vendors including Zillow, CoStar and RealPage. The other is the rent component of the Consumer Price Index. The FY2027 notice weights the private sources at approximately 55% and CPI rent at approximately 45%.

The FY2026 notice, published in August 2025, weighted private sources at approximately 64% and CPI rent at approximately 36%. Roughly nine percentage points of weight have moved from private data to the CPI in one year.

The two series do not behave the same way. Private listings data reflects rents on units being advertised now. The CPI rent index measures rent actually paid across a rotating panel of existing units, including leases signed some time ago. They can diverge, and which one carries more weight changes where a fiscal-year FMR lands.

Utilities are handled separately: state-level data from the Energy Information Administration for energy, and national water and sewer data from the Bureau of Labor Statistics.

If an area thinks the number is wrong

The FMRs are effective October 1 unless HUD receives a valid reevaluation request. Parties that make one must supply supporting data to HUD no later than Friday, January 8, 2027. Revised FMRs are posted in April 2027. Public comment on the notice runs for 30 days from publication.

The FY2026 cycle worked the same way, with its own data deadline of Friday, January 9, 2026.