Tag

Architecture Billings Index

Data

Architecture billings index fell to 44.7 in September, the lowest reading since May

The AIA/Deltek Architecture Billings Index fell to 44.7 in September from 47.2 in August, as design contracts dropped and inquiries rose.

October 21, 2026

44.7 September 2026 · -5.3% on the month · +3.2% on the year

Billings fell further below 50 in September

AIA/Deltek Architecture Billings Index, national score as first reported (50 = no change)

Each month as AIA first published it. AIA later revised December 2025 to 47.1. Source: aia.org

Data

The AIA/Deltek Architecture Billings Index rose to 47.2 in August from 46.6 in July, still below 50, as the Northeast fell to 40.7.

Sep 25, 2026

Date	Trend	Category	Title	Summary
2026-10-21		Data	Architecture billings index fell to 44.7 in September, the lowest reading since May	The AIA/Deltek Architecture Billings Index fell to 44.7 in September from 47.2 in August, as design contracts dropped and inquiries rose.
2026-09-25		Data	Architecture billings index rose to 47.2 in August as Northeast firms fell to their lowest reading since 2020	The AIA/Deltek Architecture Billings Index rose to 47.2 in August from 46.6 in July, still below 50, as the Northeast fell to 40.7.