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GSA Schedule contracts are not set in stone once they’re awarded. Throughout the life of your contract, your business will naturally undergo changes. If you have new items to add to your Schedule, items to remove, or a change in your point of contact, these changes must be made through a formal modification (mod) submission.
It’s important to understand that modifications can vary in complexity, as it really depends on the type of documentation required for submission. The tool you need to help navigate the requirements for modifications can be found on GSA’s website, specifically in the official MAS Modification Guide. If you happen to have the guide open, that’s great! As you take some time to review, let’s go through some essential details to ensure that your Schedule modifications go smoothly. We will begin by explaining what a modification is and providing some recent updates to the MAS Modification Guide itself.
What is the MAS Modification Guide?
The MAS Modification Guide is just how it sounds—a guide for modifications. Let’s say there’s a modification that requires a large number of documents; contractors may wonder what is needed ensure that their submission is complete and stands the best chance of approval from the Contracting Specialist or Officer reviewing it. The MAS Modification Guide offers a number of checklists outlining what contractors need to submit modification requests to their Contracting Specialist (CS) or Officer (CO) using the eMod system.
How to Use the MAS Modification Guide
The MAS Modification Guide is regularly updated to reflect changes made by GSA through periodic MAS Solicitation Refreshes. The latest edition, dated November 2025, is up and available for reference to ensure you are using the most current version before initiating your modification requests. We anticipate it to be changed again somewhat soon, especially with all the updates GSA is making, so it’s important you are working off the most recent copy. You can find the link on GSA’s MAS Modification Guide page.
Before your team begins to work on a modification, we strongly recommend that you review each piece of documentation carefully, as outlined in the MAS Mod Guide. For instance, if you want to add products to your GSA Schedule, you will need to provide the following:
- A cover letter with the required language as outlined in the Mod guide
- End User License Agreements/Terms and Conditions (if applicable)
- Updated Commercial Sales Practices information (CSP-1)
- *Not applicable for Schedules that operate under Transactional Data Reporting (TDR), which will apply to ALL contractors soon
- A Commercial Price List with an effective date
- Product Literature
- Printed or digital materials produced by manufacturers will provide useful context and information about what the product offers to GSA.
- Pricing Support/Justification
- Invoices, Market Research, Pricing Catalogs, and/or Quotes
- A Products Price Proposal Template (PPT) under the latest Mass Mod Refresh or a Product File
- An updated GSA Schedule Pricelist
- Revised Pricelist will be published to eLibrary
It’s the CS’s responsibility to review the modification guide and ensure that the submitted mod package meets all of the necessary requirements. There may be instances in which a Contracting Specialist opens a modification for “clarification,” indicating that not all requirements have been met, and the contractor must provide additional information to avoid potential rejection.
Be aware that there might be situations where a request seems inaccurate, such as when CS’s are asking for deliverables that are typically included in offers rather than modifications. If you notice something not specifically addressed in the guide, it is advisable to promptly contact your CS/CO and provide the evidence based on the guidelines outlined in the modification guide.
FCP’s Integration to eMod
As an existing Schedule holder, you may have received email notifications about the transition from the Schedule Input Program (SIP) to the FAS Catalog Platform (FCP). If you are still using SIP, we strongly encourage you to prepare for the upcoming transition to FCP, as SIP will eventually be permanently disabled.
Additionally, it's important to highlight that the Services Plus File is intended to replace the Services and Training PPT, the 541930 Translation and Interpretation Services PPT, and the 611630 Linguistic Training and Education PPT. The SPF includes fields for labor categories, fixed-price services and solutions, courses and training, and Other Direct Costs (ODCs).
Modification Submissions Have Changed
Now that MAS contractors are transitioning over to the FCP, modifications look a little different. The FCP directly integrates with eMod, which is intended to make the process go a little smoother. With SIP, contractors have to manually upload the Price Proposal Template (PPT) into eMod. Now, the eMod system sill will take you directly to FCP to upload the SPF/Product File.
Once you have uploaded the file to FCP, it will check for any potential errors. If the upload is successful, you will need to return to the eMod system to complete the modification submission. These new FCP templates can take some getting used to. Even if your contract hasn’t been moved to the FCP yet, it’s worth getting familiar with the intricacies of these templates well before you have to use them. Please note that encountering challenges with FCP is extremely common. You can learn more about adding, deleting, or changing items in your catalog in our blog.
Need Assistance with the MAS Mod Guide?
We understand how important it is for you to ensure that your GSA Schedule contract is up to date, which not enhances your appeal to federal buyers, but is required to stay in good standing. Failing to include the necessary documentation can lead to rejected modifications, which is why it is crucial to follow the MAS Modification Guide closely. In addition to ensuring compliance, the guide also helps you strategically market your offerings. It enables you to add new products or services and update pricing as market conditions change, ensuring your contract remains accurate, competitive, and in line with GSA pricing requirements.
The Mod Guide contains a wealth of information, but some of the documents it requests can be quite confusing. If you need assistance with your GSA Schedule modifications, please don't hesitate to contact our consulting team. We would be more than happy to help!
