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Good News Aplenty In AIA's Latest Architecture Billings Index

AIA-logoWashington, D.C. – 2018 started on a strong note for architecture firms, as the Architecture Billings Index (ABI) saw its highest January score since 2007. The American Institute of Architects (AIA) reported the January ABI score was 54.7, up from a score of 52.8 in the previous month. This score reflects an increase in design services provided by U.S. architecture firms (any score above 50 indicates an increase in billings). The new projects inquiry index was 61.1, down from a reading of 62.0 the previous month, while the new design contracts index increased slightly from 53.4 to 53.9.

“Healthy conditions continue across all sectors and regions except the Northeast, where firm billings softened for the second consecutive month,” said AIA Chief Economist, Kermit Baker, Hon. AIA, PhD. “With strong billings and healthy growth in new projects to start the year, firms remain generally optimistic about business conditions for the next several months.”

* Every January the AIA research department updates the seasonal factors used to calculate the ABI, resulting in a revision of recent ABI values.

Key January ABI highlights:

• Regional averages: West (56.2), South (55.3), Midwest (54.8), Northeast (47.3)
•  Sector index breakdown: multi-family residential (56.0), commercial / industrial (53.3), institutional (52.5), mixed practice (50.1)
• Project inquiries index: 61.1
• Design contracts index: 53.9

The regional and sector categories are calculated as a 3-month moving average, whereas the national index, design contracts and inquiries are monthly numbers.

About the AIA Architecture Billings Index

The Architecture Billings Index (ABI), produced by the AIA Economics & Market Research Group, is a leading economic indicator that provides an approximately nine to twelve month glimpse into the future of nonresidential construction spending activity. The diffusion indexes contained in the full report are derived from a monthly “Work-on-the-Boards” survey that is sent to a panel of AIA member-owned firms. Participants are asked whether their billings increased, decreased, or stayed the same in the month that just ended as compared to the prior month, and the results are then compiled into the ABI.  These monthly results are also seasonally adjusted to allow for comparison to prior months. The monthly ABI index scores are centered around 50, with scores above 50 indicating an aggregate increase in billings, and scores below 50 indicating a decline. The regional and sector data are formulated using a three-month moving average. More information on the ABI and the analysis of its relationship to construction activity can be found in the recently released White Paper, Designing the Construction Future: Reviewing the Performance and Extending the Applications of the AIA’s Architecture Billings Index on the AIA web site.

About The American Institute Of Architects

For over 150 years, members of the American Institute of Architects have worked with each other and their communities to create more valuable, healthy, secure, and sustainable buildings and cityscapes. Members adhere to a code of ethics and professional conduct to ensure the highest standards in professional practice. Embracing their responsibility to serve society, AIA members engage civic and government leaders and the public in helping find needed solutions to pressing issues facing our communities, institutions, nation and world. For more information, visit

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