Absorption Rate Tells You Whether a Submarket Can Lease Your Building

Absorption rate is the single number that answers the question every acquisition and every development pro forma quietly assumes away: can this submarket lease the space I am about to own? Vacancy tells you where a market has been. Absorption rate tells you where it is going, because it measures the pace at which tenants are taking space off the market right now. Underwrite a lease-up against a market with no absorption and the vacancy assumption in your model is fiction. The building leases at the speed of demand, and absorption rate is that speed made legible.

Key Takeaways

Absorption rate measures the pace tenants are taking space off the market, which is the real constraint on any lease-up, not the vacancy rate the offering memorandum quotes.
Divide your vacant square footage by the submarket's recent quarterly net absorption to get months of runway; if that number exceeds your business plan, the plan is the problem.
U.S. office net absorption turned positive for eight straight quarters through Q1 2026 at 6.9 million sq. ft., per CBRE, while industrial absorbed 50.9 million sq. ft. that quarter, per JLL. Demand pace varies by an order of magnitude across property types.
Net absorption can be negative, and a negative number means the market is handing space back faster than it takes it, which no vacancy figure alone will tell you.
Absorption is only meaningful at the submarket level; a metro average hides the difference between a submarket leasing and one bleeding.

What Is Absorption Rate in Commercial Real Estate?

Absorption rate is the pace at which available commercial space is leased or sold over a period, usually a quarter or a year, expressed either as square feet absorbed or as a percentage of available inventory. Net absorption, the version underwriters use, is space occupied at period end minus space occupied at period start, so it nets move-ins against move-outs and can be negative.

The distinction between gross and net matters. Gross absorption counts only new leasing, so it always looks positive. Net absorption subtracts space vacated, which is what your building competes against when a tenant leaves a rival down the street and dumps 40,000 square feet back onto the market. A submarket can post strong leasing headlines and still have negative net absorption, and only the net figure tells you whether the pool of available space is shrinking or growing.

How Do You Calculate Absorption Rate?

You calculate absorption rate by dividing the space leased in a period by the total space available, or you invert it into months of supply by dividing available space by the average absorbed per month. Months of supply is the more useful form for an operator, because it converts a demand figure into a runway your business plan can be measured against.

The formula, per Corporate Finance Institute and Wall Street Prep:

Absorption rate (%) = space absorbed in period / total available space
Months of supply = current available space / average space absorbed per month

Months of supply is the inverse of the absorption rate and answers the operator's question directly: at the current pace, how long until this space is gone? A submarket with 12 months of supply is balanced by most conventions. Below six months it is a landlord's market. Above 18 months, new vacant space sits, and any lease-up assumption faster than that pace is borrowing from hope.

Why Does Absorption Rate Predict Whether Your Building Leases?

Absorption rate predicts your lease-up because it is the only market metric denominated in the same unit as your business plan: time. Your pro forma assumes the building reaches stabilization in some number of months. Absorption rate tells you whether the submarket has produced that much net demand in any recent comparable window. If it has not, the assumption is unsupported.

Consider a worked example. You are buying a 120,000-square-foot office asset that is 60% leased, so 48,000 square feet is vacant. Your pro forma reaches 90% occupancy, another 36,000 square feet leased, in 24 months. The submarket has averaged 15,000 square feet of net absorption per quarter across the trailing year, and your building is one of four competing for that demand.

Input	Figure
Vacant space to lease to hit 90%	36,000 sq. ft.
Submarket net absorption, per quarter	15,000 sq. ft.
Competing vacant buildings	4 (yours plus 3)
Your realistic share of absorption	~3,750 sq. ft./quarter
Quarters to lease 36,000 sq. ft.	~9.6 quarters
Implied lease-up timeline	~29 months

Your model says 24 months. The submarket's demonstrated pace, once you divide the pie among the buildings chasing it, says closer to 29. That five-month gap is not a rounding error. It is five months of carrying costs, five months of interest, and a stabilization date your lender priced against. The absorption rate did not change your building. It corrected your assumption about the market's ability to fill it.

How Much Does Absorption Vary Across Markets and Property Types?

Absorption varies by an order of magnitude across property types and by direction across submarkets, which is why a single national number is useless for underwriting a specific building. Demand pace is local and sector-specific, and the same quarter can show one property type surging while another gives space back.

The Q1 2026 data makes the spread concrete:

Metric (Q1 2026)	Figure	Source
U.S. office net absorption	6.9M sq. ft. (8th straight positive quarter)	CBRE
U.S. office trailing-4-quarter absorption	27.8M sq. ft.	CBRE
U.S. industrial net absorption	50.9M sq. ft.	JLL
U.S. industrial net absorption	40M sq. ft. (up 52% YoY)	Cushman & Wakefield
U.S. multifamily Q1 absorption	~72,000 units (below the ~136,000 prior two-year average)	Industry data

Industrial absorbed roughly seven times the office figure in the same quarter. Multifamily, meanwhile, ran below its own recent average even as it stayed positive. As CBRE noted in its Q1 2026 office report, net absorption of 6.9 million sq. ft. "was the highest Q1 total since 2020 and marked the eighth consecutive quarter of positive demand." A recovering national trend still leaves individual submarkets deeply negative. The number that governs your building is the one for its submarket and its property type, not the headline.

What Does Negative Net Absorption Mean for an Owner?

Negative net absorption means the market gave back more space than it took over the period, so the pool of available space grew even if some leasing occurred. For an owner mid-lease-up, negative absorption is a red flag no vacancy snapshot will show, because vacancy is a level and absorption is the direction that level is moving.

A submarket at 15% vacancy sounds tolerable until you learn its net absorption ran negative for four straight quarters. That means competitors are pricing to fill space against a shrinking tenant pool, and your building enters a bidding war on concessions it did not budget for. The vacancy rate told you the water level. Net absorption told you the tide is going out. An owner who watches only the level gets caught flat-footed when the direction reverses, which is the situation absorption rate exists to warn against.

Frequently Asked Questions

What is a good absorption rate in commercial real estate? A good absorption rate is one that clears available space faster than your business plan requires. Expressed as months of supply, below six months favors landlords, around 12 is balanced, and above 18 months signals oversupply where new vacant space sits and lease-up assumptions should be lengthened.

What is the difference between gross and net absorption? Gross absorption counts only new space leased and is always positive. Net absorption subtracts space vacated during the period, so it reflects the true change in occupied space and can be negative. Underwriters use net absorption because it captures move-outs that gross absorption ignores.

How is absorption rate different from vacancy rate? Vacancy rate is a level, the share of space currently empty. Absorption rate is a direction, the pace at which space is being taken or given back. Vacancy tells you where a market stands; absorption tells you where it is heading and how fast.

Conclusion

Absorption rate deserves the weight underwriters give to cap rate, because it governs the one variable a lease-up cannot escape: how long the space takes to fill. Vacancy describes the past. Absorption rate, converted into months of supply and divided among the buildings competing for demand, tells you whether your stabilization date is a plan or a wish.

The operator who underwrites against demonstrated absorption prices the lease-up the market can demonstrably deliver. The one who trusts a metro vacancy figure prices a building the submarket may not be able to fill. The difference between them is not optimism or pessimism. It is whether they measured the speed of demand before they assumed it.