Section 8 Voucher Gap

What this measures

HUD sets a Fair Market Rent for every ZIP code in the ~175 metros where it publishes Small Area data. We take the 2-bedroom figure and subtract the ACS-reported median gross rent for the ZIP's parent county. The result is the "voucher gap" — the dollars and percentage by which HUD will pay above (or below) the going local rent.

A positive gap means HUD's payment standard runs above market. In those ZIPs, a landlord willing to meet HUD inspection standards and take on the program's paperwork can collect materially more than a market tenant would pay. A negative gap means market rent already exceeds the voucher cap, and the Section 8 math doesn't work.

How we build it

Every refresh, we join the current fiscal-year HUD Small Area FMR to the latest ACS 5-year median gross rent by parent county, compute the gap in dollars and as a percentage of market rent, and rank each ZIP within its metro, state, and the national set. No model fitting — the gap is a direct calculation from two federal publications, refreshed when either side updates.

What it can tell you

A first-pass screen for ZIPs where Section 8 voucher rentals can outperform market-rate rentals on gross yield. Useful for investors already comfortable with the program's administrative friction and unit-quality standards.

What it can't tell you

• Only ZIPs inside the ~232 SAFMR metros are covered. ZIPs outside that set aren't ranked.
• ACS median rent is a 5-year average ending in 2023; HUD SAFMR is FY 2026. The gap reflects a slight time mismatch, and current asking rents may have moved since the ACS window closed.
• Unit quality, neighborhood condition, and Section 8 program friction (inspections, payment delays) aren't in this signal. Two ZIPs with the same gap can be very different investments.

How to cite

REI Prime Research, "Section 8 Voucher Gap by ZIP," computed from HUD Small Area Fair Market Rent FY 2026 and U.S. Census Bureau ACS 5-Year Estimates 2019–2023, last refreshed April 2026. https://reiprime.com/markets/methodology/section-8-voucher-gap