Determine HUD income limits (very low, low, extremely low income) for a property's county to check affordable-housing program eligibility
domain: huduser.gov · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Register for a HUD USER account and request access to the Income Limits (IL) Datasets API
Obtain a bearer access token
Call GET https://www.huduser.gov/hudapi/public/il/data/{entityid} with a state/county FIPS code or CBSA code and the fiscal year
Parse the returned limits by household size and income category (extremely low, very low, low)
Cross-reference against the same fiscal year's FMR data if computing combined rent-affordability calculations
Known gotchas
Income limits are published per HUD fiscal year and change annually, sometimes with mid-year corrections — pin the year used in any eligibility determination for audit purposes
HUD income limit areas do not always match county boundaries (some are multi-county or sub-county HMFA areas), so a simple county-name lookup can point to the wrong limit set
Household-size adjustments are non-linear (not simple per-person increments), so limits must be read directly from the per-size fields rather than extrapolated
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