Introduction to ESA Costing Software
To do business with companies, ESA has developed a procedure and an associated ESA Costing Software tool called ECOS for aggregating and calculating the price elements of the financial proposals through the entire contractual chain.
By using the ESA Costing Software (ECOS), the price proposal work is partitioned through the industrial structure, and the proposals are generated and integrated to higher levels electronically.
The information presented conforms to the ESA standard costing and pricing requirements introduced in the ESA Conditions to Tender, and represented by the ESA PBFs forms (Procedures, Standards and Specifications).
The ECOS software is distributed free of charge to companies doing business with ESA.
From 30 March 2026, the use of ECOS 6 will be mandatory for all major activities. To access ECOS 6, log in at the Doing Business with ESA portal.
A set of training videos and training guides on how to build an ECOS 6 project and use the basic features of ECOS 6 will be available via this page soon.
If you are still using ECOS 5, here are some useful legacy documents: The ECOS 5 Video Training and the ECOS 5 Training Manual together with the training support files.
Find the latest details on the 'Conformal use of ECOS for the preparation of Financial Proposals' here for ECOS 5 and here f or ECOS 6.
Become a member of the ECOS Community site on Microsoft Teams where you can ask questions or interact with other ECOS users, and make requests for future ECOS software updates.
ECOS is under the responsibility of the ESA Cost Engineering Section (TEC-SYC) and ESA Industrial Audit Services Section (CIC-IA).
Contact the ECOS Help desk
– For ECOS 5
ECOS Help Desk
E-mail: ecos@radventure.com
Telephone: +31 (0)88 77 647 86
– For ECOS 6
Esait Service Desk
E-Mail: esait.service.desk@esa.int
Telephone: +39 (0)69 41 807 00
