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NASA Cost Estimating Handbook (CEH)

NASA Cost Estimating Handbook Version 4.0

NASA Cost Estimating Handbook Version 4.0

This is the fourth edition of the National Aeronautics and Space Administration (NASA) Cost Estimating Handbook (CEH), updating the 2008 edition. The purpose of this handbook is to serve as a guide for cost estimating at NASA. The intended audience covers the non-estimating professional and the new cost estimator, as well as experienced analysts. The intent of this revision is to reorganize the document into a summary with detailed appendices, as well as to provide updated content reflecting significant policy changes since the 2008 edition.

The CEH itself is a standalone summary of the process for developing cost estimates that will be of use to a broad community including the non-estimating professional.  Individual appendices cover a variety of relevant subjects in much more detail.

One of the major pieces of new content for version 4.0 is the addition of an Appendix J addressing Joint Cost and Schedule Confidence Level (JCL) analysis.  This revision to the CEH has been developed with the input and participation of the members of the Executive Cost Analysis Steering Group (ECASG), a multi-Center group that coordinates the internal NASA cost estimating and analysis community; ensures that appropriate policy is adopted; and promotes best practices are being developed, communicated, and used across the Agency.

Version 4.0 of this handbook is designed to be an electronic resource, but every effort has been made to provide a layout that enables the user to print out a hard copy.

The user can download the CEH and each of the appendices separately as needed, and has the option of downloading an integrated document that includes the CEH with all the appendices. 

CAD intends for the CEH to be a living document, and to make periodic updates to the CEH and/or individual appendices as needed (will also review annually), and will rely on feedback and input from the community of CEH users as an important source for identifying areas for improvement or addition.  The CEH downloads identify the date of latest update to any of the documents.

Links to all the CEH downloads are provided below:


Cost Estimating Handbook, v 4.0 (Updated 2/15)

Integrated CEH + All Appendices (Coming Soon)

Change Log for v 4.0 and all appendices (Pending)

To obtain copies of previous versions of the NASA Cost Estimating Handbook, contact the NASA Cost Analysis Division.

Please send feedback or suggested corrections, additions or improvements via this form:
CEH Recommended Revision Submission Form

For any general information requests, please submit them to  

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