What HUD Means by "Worst Case Housing Needs"
HUD’s Worst Case Housing Needs: 2025 Report to Congress defines the category narrowly: very low-income renter households paying more than half their income on housing, living in severely inadequate conditions, or both, who receive no federal housing assistance. By that definition, HUD counted 8.46 million households nationally in 2023, the most recent data year in the report, essentially unchanged from the record 8.53 million counted in 2021.
That flat trend line matters. Two years with no meaningful improvement means the affordability pressure at the bottom of the renter market has not eased, even as the national rental vacancy rate has held at a moderate 7.3% as of Q2 2026, a sign the strain is more about price than raw supply for this population.
Severe Cost Burden Among the Lowest-Income Renters
The same HUD report breaks the numbers down further for the lowest income tier. Among the nation’s 11 million extremely low-income renter households, those earning below 30 percent of their area’s median income, 74 percent, 8.2 million households, are severely cost-burdened, spending more than half of what they earn on rent and utilities alone. That leaves almost nothing for the kind of maintenance, savings, or cushion that would let a household absorb a rent increase or a repair bill without a crisis.
For a landlord holding that kind of tenant, the math cuts both ways. A tenant already spending more than half their income on housing has little room to absorb a rent increase, which puts real pressure on a landlord who is also facing rising costs of their own, insurance, taxes, maintenance, and is weighing whether to keep raising rent on a stretched tenant or exit the rental altogether.
The Numbers
HUD counted 8.46 million very low-income renter households with worst case housing needs in 2023, virtually unchanged from the record 8.53 million in 2021.
74 percent (8.2 million) of the nation’s 11 million extremely low-income renter households are severely cost-burdened, spending more than half their income on rent and utilities.
The national rental vacancy rate stood at 7.3% in Q2 2026, not statistically different from 7.0% a year earlier.
US Census Bureau, Quarterly Residential Vacancies and Homeownership, Q2 2026
Sources
The external data in this article draws on the sources below. Figures described in the text as estimates or industry triangulations are directional and are not attributed to a single dataset.
- HUD, Worst Case Housing Needs: 2025 Report to Congress
- US Census Bureau, Quarterly Residential Vacancies and Homeownership, Q2 2026