The definition
The capture rate is the number of units a development is proposing divided by the net income-qualified demand in the Primary Market Area for the same target population and AMI band. A lower capture rate means the project needs only a small slice of available demand — a favorable sign. A high capture rate means it must absorb a large share of all eligible renters, which is riskier.
The formula
Capture rate = proposed units (often adjusted by a stabilized occupancy factor, e.g. 95%) ÷ net demand. Net demand is typically the demand pool (income-qualified renter households in the target bands, including demand from in-migration, turnover, and substandard-housing conversion) minus comparable competitive supply.
Capture rate vs. penetration rate
They are related but distinct. The capture rate measures the subject's units against net demand. The penetration rate measures all comparable affordable units (existing plus proposed, including the subject) against the demand pool — i.e., how saturated the market already is. A study usually reports both.
What thresholds reviewers use
- For family LIHTC, capture rates at or below about 25% are commonly considered achievable.
- Senior and special-needs deals often use different (sometimes higher) thresholds because the eligible pool is defined differently.
- There is no universal hard cap — each HFA sets its own expectation, and underwriters may flag anything above their comfort range for additional justification.
- Always apply the threshold your specific state agency publishes, not a generic rule.
Why a low capture rate isn't automatically “good”
A very low capture rate computed from a generously drawn PMA or an inflated demand pool is not credible. Reviewers reconstruct the demand calculation step by step; if the inputs don't hold up, a flattering capture rate works against you. The number is only as trustworthy as the PMA and demand assumptions behind it.
Generate a compliant market study in minutes
StudyScribe auto-fills BLS, Census, HUD & FBI data, applies your state HFA's requirements, and exports a publication-ready DOCX.
Start free →Frequently asked questions
What is a good capture rate for a LIHTC project?
For family LIHTC, at or below ~25% is generally viewed as achievable, but the exact expectation varies by state agency and by target population (senior, special-needs, etc.). Check your HFA's published threshold.
What's the difference between capture rate and penetration rate?
Capture rate compares the subject's proposed units to net demand; penetration rate compares all comparable affordable units (existing + proposed) to the demand pool, measuring overall market saturation.
More guides
Browse LIHTC requirements by state →
General reference for affordable-housing analysts; not legal or compliance advice. Always confirm requirements against the current QAP / market study guidelines before submission.