BT01 Index for September 2024 was published officially

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The BT01 Index for September 2024 was published in the Official Journal on 11/17/2024.

The value of the BT01 Index for September 2024 is 131.2 to 130.2 in September 2023, an annual increase of 0.77% over 12 rolling months. The September index decreased by -0.38% from the last month (131.7 in August 2024).

BT01 index variation table for September 2024


Index BT01
September 2024
Index BT01
August 2024
Index BT01
September 2023
Value of BT01 index131.2131.7130.2
Variation in % compared to the base
Down -0.38%Up +0.77%
Values and % change in the BT01 index

Official source: INSEE.

Our BT01 index evolution table for 2024 has been updated here:

Table of BT01 indices for 2024 (national index for all building trades):

The BT01 Index (base 100 in 2010) measures changes in the cost of factors of production in the Building Industry (salaries and expenses, cost of materials, energy, etc.). It is the official reference for updating and revising construction contract prices.

Official BT01 Index
Publication of BT Index for September 2024

The Index is published each month by INSEE with a 2-month delay. It thus succeeded the Index of the Building and Public Works (1974 and 1975), which was stopped. Most companies in various construction trades (electricity, painting, masonry, etc.) are concerned with the BT01 Index.

Download the values of all BT indexes for September 2024:

Frequently Asked Questions about the BT01 Index for September 2024

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Pascal FROMAGER

With more than 25 years of experience navigating the financial, HR, and tax challenges businesses face, I bring a wealth of practical insight to every topic. As a former Chief Financial Officer (CFO) and a graduate of the University of Rennes, I established Juristique to share this expertise in business law. My commitment is to provide ongoing regulatory monitoring and to transform complex administrative publications into clear, precise, and practical resources for readers. All content is rooted in rigorous analysis of official texts and institutional sources, ensuring reliable and regularly updated information.
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