CRE 101 · deweyluong.realtor

Absorption Rate Explained: How Fast a Georgia Commercial Market Actually Fills Space

Vacancy tells you how much space is empty today. Absorption tells you how fast it is filling — or emptying — and that pace is what decides whether a new center leases up in 12 months or bleeds carry costs for 24. This page works the gross-to-net arithmetic on one submarket, then turns it into a lease-up timeline. By Túy “Dewey” Luong, CCIM — Founding Broker, SERHANT. Atlanta · 318 closed sales / $281.2M career volume · 678-707-2498

The worked example uses made-up, rounded numbers to teach the mechanics. This page is general education, not financial or lending advice.

Absorption in one formula

• Gross absorption: total square footage leased or occupied in the period. Move-ins only — it is always positive and always flattering.
• Net absorption: occupied SF at the end of the period − occupied SF at the start. The same number as gross absorption minus everything vacated. This is the figure that measures real demand growth.
• The pace: net absorption ÷ months in the period = SF absorbed per month. Divide any block of vacant space by that pace and you get months of supply — the lease-up clock every development feasibility study runs on.
• Supply is the other blade: new deliveries add inventory whether or not demand shows up. Strong absorption with a bigger delivery wave still pushes vacancy up.

Worked example. The numbers below are made up and rounded to teach the mechanics. This is not a real property.

• The submarket: a Gwinnett retail corridor with 2,000,000 SF of inventory and 8.0% vacancy on January 1 — occupied space = 1,840,000 SF, vacant = 160,000 SF.
• The year: tenants sign and occupy 150,000 SF (gross absorption), other tenants vacate 63,900 SF, and developers deliver 60,000 SF of new space. Year-end inventory = 2,060,000 SF.
• Year end: vacancy is 6.5%, so occupied space = 2,060,000 × 93.5% = 1,926,100 SF.
• Net absorption: 1,926,100 − 1,840,000 = 86,100 SF — and it cross-checks: 150,000 leased − 63,900 vacated = 86,100 SF. Vacancy fell even after 60,000 SF of new supply, because demand outran both.
• The pace and the clock: 86,100 ÷ 12 ≈ 7,175 SF per month. Vacant stock at year end is 133,900 SF — about 18.7 months of supply at that pace.
• Your building on the same clock: a new 30,000 SF center filling at 2,500 SF per month leases up in 12 months; at half that pace, 24 months — and every extra month is interest carry, taxes, insurance, and operating shortfall with no rent against it. This is the number that makes or breaks a construction budget.

Four absorption traps

• Quoting gross as net: a submarket bragging about 150,000 SF of leasing that quietly lost 140,000 SF grew by only 10,000 SF. Always ask what vacated.
• One tenant is not a trend: a single 80,000 SF anchor move can be a whole year of a small submarket's net absorption. Strip the one-offs before extrapolating the pace.
• Ignoring the delivery pipeline: 18.7 months of supply becomes 30+ months if two permitted projects deliver into the same corridor next year. Absorption is measured on the past; underwriting lives in the future supply.
• Wrong competitive set: metro-wide absorption includes space your tenants would never take. The pace that matters is your property type, your size range, your corridor — the same discipline as a rent roll read.

Cho nhà đầu tư người Việt

Absorption (tỷ lệ hấp thụ) đo tốc độ một thị trường lấp đầy mặt bằng. Gross absorption là tổng diện tích thuê mới; net absorption trừ đi phần mặt bằng bị trả lại trong cùng kỳ. Trong ví dụ trên trang này: thị trường 2.000.000 SF thuê mới 150.000 SF, trả lại 63.900 SF, nên net absorption = 86.100 SF/năm, khoảng 7.175 SF/tháng, và tỷ lệ trống giảm từ 8,0% xuống 6,5% dù có thêm 60.000 SF nguồn cung mới. Khi xây hoặc mua một trung tâm mới, thời gian lấp đầy = diện tích cần lấp ÷ tốc độ hấp thụ thật: 30.000 SF ở tốc độ 2.500 SF/tháng là 12 tháng; tốc độ giảm một nửa là 24 tháng và chi phí carry tăng theo. Đừng chỉ nhìn tỷ lệ trống — hãy hỏi tốc độ. Đây là thông tin giáo dục chung, không phải tư vấn tài chính.

Frequently asked questions

What is absorption in commercial real estate?

Absorption measures how much space a market actually fills over a period. Gross absorption is the total square footage leased or occupied in the period — it only counts move-ins. Net absorption subtracts the space vacated in the same period: occupied square footage at the end minus occupied square footage at the start. Net absorption is the honest number, because a market can sign 150,000 SF of leases and still shrink if 160,000 SF emptied out behind it. Positive net absorption means demand grew; negative net absorption means the market gave space back.

Walk through a net absorption example with real arithmetic.

Made-up numbers for a Gwinnett retail submarket: total inventory 2,000,000 SF, vacancy 8.0% at the start of the year, so occupied space is 1,840,000 SF. During the year tenants lease 150,000 SF gross, but 63,900 SF is vacated, and developers deliver 60,000 SF of new space, bringing inventory to 2,060,000 SF. At year end vacancy is 6.5%, so occupied space is 1,926,100 SF. Net absorption = 1,926,100 − 1,840,000 = 86,100 SF — which is exactly the 150,000 SF leased minus the 63,900 SF vacated. Vacancy fell even though new supply arrived, because demand outran both move-outs and deliveries.

How do you turn absorption into a lease-up timeline for a new building?

Divide the space you must fill by the pace at which comparable space is actually being absorbed. In the worked example the submarket absorbed 86,100 SF net in a year — about 7,175 SF per month — and still had 133,900 SF vacant at year end, roughly 18.7 months of supply at that pace. For a single project the same math applies at its own scale: a new 30,000 SF center whose small-shop bays are leasing at 2,500 SF per month needs about 12 months to fill; if the pace halves to 1,250 SF per month, lease-up takes 24 months and the interest carry, taxes, and operating shortfall roughly double with it. Underwrite the slower case, not the brochure case.

What is the difference between absorption and vacancy?

Vacancy is a snapshot: the share of inventory empty on one date. Absorption is the movie: how fast occupied space is growing or shrinking between dates. The two can disagree in ways that matter — vacancy can fall because a landlord demolished or converted a building (supply shrank, demand did not grow), and vacancy can rise during strong leasing if a wave of new deliveries lands at once, as in the worked example's +60,000 SF. A broker who quotes only the vacancy rate is showing you one frame; absorption tells you which direction, and how fast, the market is moving.

Absorption (tỷ lệ hấp thụ) là gì, chủ doanh nghiệp và nhà đầu tư người Việt cần lưu ý gì?

Absorption đo tốc độ một thị trường lấp đầy mặt bằng. Gross absorption = tổng diện tích thuê mới trong kỳ; net absorption = diện tích có người dùng ở cuối kỳ trừ đầu kỳ, tức đã trừ phần bị trả lại. Ví dụ trên trang này (số liệu giả định): thị trường bán lẻ 2.000.000 SF ở Gwinnett thuê mới 150.000 SF, trả lại 63.900 SF, nên net absorption = 86.100 SF trong một năm, khoảng 7.175 SF/tháng; tỷ lệ trống giảm từ 8,0% xuống 6,5% dù có thêm 60.000 SF nguồn cung mới. Ba lưu ý: (1) đừng nhìn tỷ lệ trống đơn thuần — phải hỏi tốc độ hấp thụ; (2) khi xây hoặc mua trung tâm mới, thời gian lấp đầy = diện tích cần lấp ÷ tốc độ hấp thụ thật — trung tâm 30.000 SF với tốc độ 2.500 SF/tháng cần 12 tháng, tốc độ giảm một nửa là 24 tháng và chi phí carry tăng gấp đôi; (3) nguồn cung mới sắp bàn giao có thể nuốt hết hấp thụ dù nhu cầu vẫn tốt. Đây là thông tin giáo dục chung, không phải tư vấn tài chính.

This page is general education, not investment, legal, tax, lending or financial advice. Every figure in the worked example is made up and rounded to teach the mechanics. Túy “Dewey” Luong, CCIM — Founding Broker, SERHANT. Atlanta · 678-707-2498 · dewey.luong@serhant.com