HUD published its 2027 Difficult Development Areas and Qualified Census Tracts on Oct. 6, the annual notice that decides where a Low-Income Housing Tax Credit building can claim up to 130 percent of its eligible basis. The new lists apply to credit allocations made after Dec. 31, 2026.
For a developer with a deal straddling the year-end, the dates matter more than the maps.
When the 2027 DDA and QCT designations apply
The Federal Register notice sets two triggers. For competitive credits, the 2027 lists govern allocations made after Dec. 31, 2026. For bond-financed projects under IRC Section 42(h)(4), they govern where the bonds are issued and the building is placed in service after that date.
A site that drops off the list isn’t cut off overnight. HUD kept its 730-day rule: a project holds the designation in effect when its complete application was filed, provided the credit allocation, or the bond issuance or placed-in-service date, follows within 730 days of that application.
The notice walks through seven worked cases. In one, an application filed Nov. 15, 2027, with credits allocated Oct. 30, 2029, keeps its 2027 status. In another, an application filed Dec. 1, 2027, with an allocation on March 30, 2030, loses it. That gap is 850 days.
Multiphase projects get a longer leash. Every phase can use the status that applied to the first, but only if the first application described the project as multiphase and later applications arrive in consecutive years. HUD’s example of a failure is a second-phase application filed two years after the first, with no multiphase disclosure up front. That’s a paperwork miss that costs the boost.
How HUD picks LIHTC difficult development areas
Metro DDAs are drawn at the ZIP code tabulation area level. Nonmetro DDAs are drawn by county. HUD ranks each by the ratio of its two-bedroom fair market rent to the LIHTC rent a household at the income limit could pay, then designates from the top until it reaches a cap: 20 percent of total metropolitan population, and 20 percent of nonmetropolitan population.
The rents HUD uses here are not the FY 2026 Small Area FMRs that voucher programs use. The notice lists four differences: no ceiling at 150 percent of the metro FMR, no 10 percent limit on annual decreases, a New York City adjustment for rent regulation, and no state nonmetropolitan floor. Uncapped rents push high-cost ZIP codes further up the ranking than the published FMR tables would suggest. Anyone screening sites off the standard FMR lookup is reading the wrong column.
QCTs run on different data. A tract is eligible if at least half its households earn under 60 percent of area median gross income, or if its poverty rate is 25 percent or more. HUD tests that across three American Community Survey releases (2018-2022, 2019-2023 and 2020-2024) and wants a pass in at least two. It discards estimates whose margin of error exceeds half the estimate.
What the LIHTC basis boost notice leaves out
The count.
The Federal Register text doesn’t say how many ZIP codes, counties or tracts made the 2027 lists, how many fell off, or where the cutoff ratio landed. The lists and the methodology spreadsheet sit on HUD User, and the comparison with 2026 is left to the reader. There’s no comment period either. The designations are a statutory duty, and HUD treats the notice as categorically excluded from environmental review.
A day earlier HUD left its Section 3 labor-hour benchmarks unchanged, and before that it raised the Section 108 loan guarantee fee for FY 2027. That’s three sets of 2027 federal terms for affordable housing builders in about a week.
Check the ZIP code before the application goes in. Then count 730 days from the day it does.