AIA/Deltek Architecture Billings Index (ABI) FAQ

Modified on Thu, 20 Mar at 12:34 PM

What is the ABI?

The Architecture Billings Index (ABI) is a leading economic indicator that tracks the demand for architectural services in the U.S. It’s based on monthly surveys of architecture firms about whether billings have increased, decreased, or stayed the same.

 

Why Does It Matter?

Since architecture work happens early in the construction process, ABI trends give a preview of future activity in the construction and real estate industries. It helps architects, contractors, suppliers, and policymakers anticipate economic shifts.

 

How is the ABI Measured?

ABI is measured on a scale where 50 is the midpoint.

 

How to read the ABI score?

ABI is measured on a scale where 50 is the midpoint.

  • Above 50 = More firms report increasing billings → Industry growth
  • Below 50 = More firms report declining billings → Industry slowdown
  • Around 50 = Little to no change

 

Why is it relevant for members and the profession?

  • For Architecture Firms: A high ABI means more project opportunities; a low ABI might signal tougher times.
  • For Contractors & Suppliers: A declining ABI could mean fewer projects in the pipeline.
  • For Associations & Membership Teams: Understanding ABI trends helps tailor member support, advocacy, and resources accordingly.

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