Lease-Up

What Is Lease-Up?

Lease-up is the stretch of time between when a new or substantially renovated rental property begins accepting residents and when it is essentially full. It is the last phase of development and the first phase of operations. The term “rent-up” means the same thing.

Lease-up ends at stabilization, the point at which occupancy and rental income have held steady long enough for lenders and investors to treat the property as a going concern. Loan and investment agreements define stabilization for each deal.

How Lease-Up Works

A typical lease-up includes:

• Marketing. Advertising begins months before opening. For properties in Federal Housing Administration (FHA) programs, regulations of the U.S. Department of Housing and Urban Development (HUD) require an affirmative marketing program to attract tenants of all minority and majority groups. HUD proposed rescinding these regulations in June 2025, but they remained in the Code of Federal Regulations as of October 2026.
• Applications and screening. Applicants are reviewed against the property’s written tenant selection criteria. Many affordable properties open with a waitlist built during construction.
• Income certification. In income-restricted housing, staff verify each household’s income and size against the program’s income limits before move-in.
• Move-ins. Units are leased as they pass final inspection, sometimes floor by floor.

Lease-Up and the Tax Credit

The Low-Income Housing Tax Credit ties investor benefits closely to lease-up. A building is placed in service when its first unit is ready and available for occupancy, according to the IRS. The 10-year credit period begins that year or, if the owner elects, the next year.

Under Section 42(f)(2) of the tax code, the first year’s credit is prorated. The owner adds up the building’s applicable fraction, its share of qualified low-income units, as of the close of each full month the building was in service that year, then divides by 12. Any credit lost in year one is not forfeited. It is claimed in year 11. But low-income units added after the first year generally earn credits at only two-thirds of the normal rate, which gives owners a strong reason to fill qualified units quickly.

Example

Suppose a 50-unit tax credit building, with every unit reserved for low-income households, is placed in service on July 1 and 10 qualifying households move in each month. Its applicable fraction is 20% at the end of July, 40% in August, 60% in September, 80% in October, and 100% in November and December. Those six figures add up to 400%. Divided by 12, the first-year fraction is about 33%, so the owner claims roughly one-third of a full year’s credit in year one. The shortfall moves to year 11, which changes when investors receive their tax benefits.

Why It Matters for Workforce Housing

Lease-up shows whether a market study was right about demand at the planned rents. Properties aimed at moderate-income workers can lease quickly where there is a severe shortage. They can also lease slowly if the rents end up too close to market rates.