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


What is eOffer?

eOffer is a web-based application that allows offerors to electronically prepare and submit a MAS offer to the Federal Acquisition Service (FAS).

What is the purpose?

The purpose of eOffer is to create an interactive, secure electronic environment that simplifies the contracting process from submission of offers to awards. eOffer enables a seamless transmission of data from the industry community to the FAS contracting offices.

How are documents signed?

Offerors sign documents electronically to create a legally binding electronic contract.

Learn about the eOffer process

Go to the MAS Roadmap to learn more about the offer process.The offer process has three basic steps you must complete before you can submit your offer. First, you should get ready by taking required training, completing necessary registrations, and reading the MAS solicitation. Next you’ll assemble your offer. Last, you’ll finalize your offer.

Step 1 - Authentication

Digital certificates are not required to access eOffer.

Offerors will use FAS ID credentials to access eOffer. FAS ID is a secure, centralized identity management system that allows contractors to access many GSA applications with one email and password. FAS ID was created as part of our overall IT modernization effort and is used to access applications, such as FAS Sales Reporting Portal (SRP), GSA Advantage Purchase Order Portal, GSA Vendor Portal, the Mass Mod Portal, eBuy, etc. Follow the instructions on the eOffer homepage to register for FAS ID, if needed.

Step 2 - Completing the Offer

Offeror completes all sections within the eOffer process and adds supporting documents, e.g. pricelist.

Step 3 - Submitting the Offer

Once the offeror is satisfied with the responses and supporting documents, they will click "Submit Proposal". The application then creates an offer document that shows your responses. This offer document is electronically sent to the Contracting Office with all your attachments.

Step 4 - eOffer Review

Once the offer has been assigned and reviewed by the GSA Contracting Official, they will contact the offeror with clarifications or additional requested information.

Step 5 - Award Contract

After the offer review process is complete, the GSA Contracting Official will create the contract package including (all the files that will make up the final contract). Creating the contract package generates an email to the offeror notifying them to go into eOffer and sign the contract package. Once the package is signed by the offeror, it generates an email notification for the GSA Contracting Officer(CO) to sign the documents. After the CO signs the documents, a notification is emailed to both the contractor and the CO. The contractor can go into eOffer and download the documents.