Annual Adjustment Factor (AAF)

The Annual Adjustment Factor is the percentage used by HUD to update FMR and contract rents each year, reflecting changes in local rental market conditions.

The Annual Adjustment Factor (AAF) is a percentage figure published by HUD each year that is used to adjust Fair Market Rents and existing Section 8 contract rents to keep pace with local rental market changes. The AAF reflects how rents in a given area have changed over the previous year and varies by metropolitan area and unit size.

HUD calculates AAFs using data from the Consumer Price Index (CPI) residential rent component, American Community Survey gross rent data, and other market indicators. The AAF may differ from general inflation because it specifically measures changes in residential rents, which can move independently of the overall economy.

For existing Section 8 contracts, the AAF determines rent increases. When a landlord's HAP contract is up for annual renewal, the rent adjustment is typically limited to the AAF for that area. This prevents excessive rent increases while ensuring landlords can keep pace with rising market rents. If the AAF is 3%, for example, a landlord can generally increase the contract rent by up to 3%.

For FMR calculations, the AAF plays a role in updating base-year data to the current fiscal year. HUD applies CPI-based adjustments to trend American Community Survey rent estimates forward to the upcoming fiscal year. Understanding AAFs helps landlords anticipate rent increase opportunities and helps tenants understand why their rent share may change. View current FMR rates at FMR8.com.

Frequently Asked Questions

What is the Annual Adjustment Factor?

The Annual Adjustment Factor (AAF) is HUD's annual percentage update to Fair Market Rents and Section 8 contract rents. It reflects local rental market changes and is calculated using Consumer Price Index rent data and Census surveys. It varies by metro area and unit size.

How does the AAF affect Section 8 landlords?

The AAF limits how much a landlord can increase Section 8 contract rent at annual renewal. If the AAF is 3%, the landlord can generally request up to a 3% rent increase. The actual increase is also subject to rent reasonableness requirements.

Related Terms

• Fair Market Rent (FMR) — Fair Market Rent is the amount HUD determines is needed to rent a moderately-priced unit in a given area. FMR sets the b...
• U.S. Department of Housing and Urban Development (HUD) — HUD is the federal agency responsible for housing policy, including setting Fair Market Rents, administering Section 8, ...
• Payment Standard — The payment standard is the maximum subsidy amount a Public Housing Authority will pay for a given unit size. It is base...
• Housing Assistance Payment (HAP) — The Housing Assistance Payment is the monthly subsidy the PHA pays directly to the landlord on behalf of a Section 8 vou...