All revised and historical Syntec index values for 2024

The revised Syntec index measures changes in the cost of services in 2024 in the engineering, IT services, research and recruitment consultancy, and professional training sectors.

Its value reflects the evolution of salary costs (including charges). It is used, in particular, to index contracts for fixed-price projects, IT management, or software maintenance.

The revised Syntec index is calculated and published by the Syntec Federation (not INSEE) or by paying services such as “Le moniteur”. It has been published since September 2022, replacing the old Syntec index.

Revised Syntec Index 2024 release dates
Official Syntec 2024 Index

Only the Syntec Federation will now monitor and publish the revised Syntec index. A “connection coefficient” has been calculated, equal to the ratio of the value of the Revised Index of August 2022 and the last computed value of the old index, similar to 0.97975, i.e. (280.6 / 286.4). This adjustment coefficient may be necessary for contractual reasons.

Syntec index 2024

Month & YearDate of publication (or expected date of publication)Revised Syntec IndexChange over 12 consecutive months in the revised indexChange / previous month of the revised indexValue to be used for contracts signed before August 2022 (revised index adjusted for the connection coefficient)Change over 12 consecutive months of the old Syntec indexVariation / previous month of the old Syntec index
December 2024Expected publication date: 2025-01-31UNKN/AN/AN/AN/AN/A
November 2024Expected publication date: 2024-12-29UNKN/AN/AN/AN/AN/A
October 2024Expected publication date: 2024-11-29UNKN/AN/AN/AN/AN/A
September 2024Expected publication date: 2024-10-31UNKN/AN/AN/AN/AN/A
August 2024Expected publication date: 2024-09-30UNKN/AN/AN/AN/AN/A
July 2024Expected publication date: 2024-08-30UNKN/AN/AN/AN/AN/A
June 2024Expected publication date: 2024-07-31UNKN/AN/AN/AN/AN/A
May 2024Expected publication date: 2024-06-29UNKN/AN/AN/AN/AN/A
April 2024Expected publication date: 2024-05-29UNKN/AN/AN/AN/AN/A
March 2024Expected publication date: 2024-04-28UNKN/AN/AN/AN/AN/A
February 20242024-03-29311.14.22%0.19%304.84.22%0.19%
January 2024 2024-02-29310.55.65%0.13%304.25.65%0.13%
Syntec 2024 index table and percentages (%) of change

The values in this table will be updated as the index is published during the year 2024.

How to use the SYNTEC index?


The service contract prices can be adjusted on each contract expiration date based on a formula that incorporates changes in the Syntec index. The reference index used will be that of November or October.

Method for implementing the Syntec 2024 index formula

[New Price (P1)] = [Old Price (P0)] X [Known Reference Syntec Index (S1)] / [Reference Syntec Index (S0)] :

How do I apply the Syntec index to a price increase?
Syntec Index price revision formula


For price revisions on the first of January of each year, it is advisable to take the November or October Syntec index as a baseline for practical reasons. Indeed, the December index is only known at the end of the following January, which is late for the application of contractual price increases.

Finally, find out more about the history of the Syntec index.

We are interested in your opinion on using the Syntec index:

Tell us in the comments. THANKS.

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Specialist in finance and taxation from my professional activity and university formation, I share my knowledge and experience on the Juristique website. I regularly publish economic indexes such as SYNTEC index, BT01, ILAT, construction and rent reference indexes, and banking tools like SWIFT Codes or CNAPS Codes for international wire transfers.

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