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eOffer/eMod
eOffer/eMod is a tool to submit Contract Offers and Contract Modification requests to GSA Federal Acquisition Service online.

Account Registration

Register new Account

Contract Offers

Prepare, Submit, or Update an eOffer

Before you begin...

Contract Modifications

Prepare, Submit, and Correct a Modification Request

Before you begin...

FAS Sales Reporting

Report Sales Data

By April 4, 2022, the government will stop using the Data Universal Numbering System (DUNS) as the Unique Entity Identifier (UEI) and will transition to using the System for Award Management (SAM) assigned UEI. On December 17, 2021, contractors can begin using their UEI (SAM) in eOffer/eMod. Contractors may use their UEI (DUNS) until the transition is complete in April 2022. Click here for more information on the government transition to UEI (SAM).

GSA made changes to Letter of Supply requirements effective May 17, 2021. Please visit the MAS Roadmap - Letter of Supply requirements for more information.

eOffer/eMod FAS ID Guidelines

Starting March 8, 2021, contractors must use FAS ID multi-factor authentication to access eOffer/eMod. For more information about the implementation of FAS ID for eOffer/eMod, please visit GSA Interact.


Who must Register to use FAS ID for eOffer/eMod?

Offerors/contractors that have not already registered for a FAS ID for another GSA application (FAS Sales Reporting Portal (SRP), GSA Advantage Purchase Order Portal, GSA Vendor Portal, the Mass Mod Portal, eBuy, etc.).

Note for New Offerors: please ensure that you are listed in SAM as one of the following points of contact:

  1. Government Business POC
  2. Electronic Business POC
  3. Government Business Alternate POC
  4. Electronic Business Alternate POC
  5. Past Performance POC
  6. Past Performance Alternate POC

Note for Current Contractors: please ensure that you are listed as an authorized negotiator on the contract (with or without signing authority).


Who does not need to register for a FAS ID to access eOffer/eMod?:

Offerors/contractors that are current eOffer/eMod users and use FAS ID for another application (FAS Sales Reporting Portal (SRP), GSA Advantage Purchase Order Portal, GSA Vendor Portal, the Mass Mod Portal, and eBuy). Your account will be validated based on you being an authorized negotiator on the contract. You do not need to register.