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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

Attention Contractors! Want to learn about modification best practices, specifically Economic Price Adjustment modifications? Please view a recent Interact post for best practices and a helpful Frequently Asked Question document.

Attention eMod Users:
As of 10/08/2022 you no longer need to submit a modification request to update your Industrial Funding Fee (IFF) Point of Contact (POC). To update your IFF POC, email your Administrative Contracting Officer (ACO). Not sure who your ACO is? Use the ACO Locator Tool found at the bottom of the Vendor Support Center homepage. If no ACO is assigned to your contract, contact your Contracting Officer.

Please note! The window for our annual FAS ID user recertification for the eOffer/eMod system has closed. If you failed to take action to recertify and need to regain access to eOffer/eMod, please contact the help desk at or 1-866 472-9114.

eOffer/eMod FAS ID Guidelines

Contractors must use FAS ID multi-factor authentication to access eOffer/eMod.

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.