BT01 Index for September 2022 was published officially

The BT01 Index for September 2022 was published in the official journal on 11/23/2022.

The value of the BT01 Index for September 2022 is 127.1 to 118.6 in September 2021, an annual increase of 7.17% over 12 rolling months. The September index is down -0.63% from the previous month (127.9 in August 2022).

BT01 index variation table for September 2022


Index BT01
September 2022

Index BT01
August 2022

Index BT01
September 2021

Value of BT01 index




Variation in % compared to the base

Down 0.63%

Up 7.17%

Official source: Insee.

Our index evolution table for 2022 has been updated here: BT01 Index 2022.

Official BT01 Index
Publication of the September 2022 index

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.

The Index is published each month by INSEE with a 3-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.

In addition, find the: official publication of other BT and TP indices for September 2022.

Frequently asked questions about the BT01 index for September 2022

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