Absorption RateAbsorption rate in real estate: how fast apartments are being leased.

What absorption rate in real estate means

Absorption counts the net number of units that become occupied during a period, such as a month or a year. Positive absorption means more units were leased than were vacated; negative absorption means more residents left than arrived.

Market-wide, strong absorption relative to new supply supports rent growth. Weak absorption can lead to rent concessions and a falling occupancy rate.

The absorption rate formula

Absorption rate = units leased (net of move-outs) / period

For a single new building, absorption is usually stated as units leased per month. For a market, it is the change in occupied units over a period, which counts new buildings as well as existing ones.

A worked absorption example

Illustrative figures, not from a real property

A new 200-unit community leases an average of 20 units a month, net of move-outs. To reach 190 occupied units, or 95 percent, it needs about 9.5 months, all else equal.

If absorption slows to 12 units a month, the same goal takes almost 16 months. Each extra month of lease-up is another month of carrying costs against partial income.

Absorption in Reno

According to ALN Apartment Data (September 2026), 1,064 units were absorbed in the Reno market over the year, and conventional properties were 94.1% occupied. The Reno apartment market data page has the trend.

Developers and lenders use absorption to set lease-up budgets, and owners use it to judge how much new supply nearby will compete for the same residents.

Absorption against new supply

Absorption means most when you set it against new supply. If a market adds, say, 1,000 new units in a year and absorbs 600, occupancy falls even though demand is growing. If it absorbs more than it adds, occupancy rises and concessions tend to fade. Watch both numbers before you set rents or a lease-up budget.