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Have you been keeping up with the latest GSA Schedule updates? If so, you may have seen the OLM SIN changes in the recent Mass Modification for Multiple Award Schedule (MAS) Refresh #30. Before we dive deeper, you might be wondering about the purpose of the OLM Special Item Number (SIN) and how it can benefit you. When does it apply to contractors? How often can you use it? Read on to learn more.
What Are Order-Level Materials (OLMs)?
Order-Level Materials (OLMs) are supplies and services acquired to directly support an individual task or delivery order under a Federal Supply Schedule (FSS) contract or Blanket Purchase Agreement (BPA). Unlike traditional items listed on a contractor’s GSA Schedule, OLMs are not initially included in your Schedule contract pricelist. Instead, they are added at the task order level when specific materials or services are needed, but were not recognized or identified at the time of contract award.
Having this kind of flexibility allows contractors to provide the necessary items or services to meet any unique/complex requirements of each order. It’s also worth noting that the Contracting Officer conducting the review/overseeing the order has to make sure that the prices for all OLMs are still considered "fair and reasonable". Additionally, OLMs do not include items awarded under Ancillary Supplies or Other Direct Cost (ODC) SINs.
Purpose of the OLM SIN
Before the introduction of the OLM SIN, any item or service that was not already listed on a contractor's GSA Schedule but was required for a specific task order was classified as an "open market" item. GSA recognized that this classification created inefficiencies in the procurement process, requiring extra paperwork and approval steps that led to administrative challenges. As a result, it became more difficult for GSA MAS contracts to compete with other Indefinite Delivery Indefinite Quantity (IDIQ) contracts. To address these issues, the OLM SIN was introduced, which provided a more straightforward and efficient method for managing and pricing these materials at the task order level.
Before we discuss more of the specifics of OLMs and any recent updates or changes, let’s take a moment to review the latest news regarding changes to the OLM SIN.
MAS Refresh #30 and the OLM SIN
If you have been staying up-to-date with recent news on websites like GSA Interact or reading our latest blog posts, you likely know that MAS Solicitation Refresh #30 was released in November 2025.
For the OLM SIN specifically, GSA removed certain clauses:
- 552.238-115, Special Ordering Procedures for The Acquisition of Order-Level Materials (SEP 2024)
- SCP-FSS-007, Special Proposal Instructions for Order-Level Materials Special Item Number (DEC 2019)
GSA also originally planned to incorporate the Revolutionary Federal Acquisition Regulation (FAR) Overhaul (RFO) updates, and remove the 33% OLM SIN cap. Right now, GSA plans to incorporate this into a future refresh, but we’ll dive into it now, so you’re prepared.
The OLM SIN and the Revolutionary FAR Overhaul (RFO)
In the Revolutionary FAR Overhaul (which is part of part of the Trump Administration’s Restoring Common Sense to Federal Procurement Executive Order) Federal Schedule Supply (FSS) Ordering Procedures were removed from FAR 8.4 and given their own part in the General Services Acquisition Regulation (GSAR) supplement in 538.71. In this part, the 33% cap on the OLM SIN was removed.
Historically, contractors had to ensure that OLM items under any order did not exceed 33.33 % of the total order value. However, under the newer RFO initiative, the cap will be removed. While the final regulatory text is still subject to updates, such as more details regarding cuts to non-statutory requirements and shifting guidance to companion documents, contractors need to be aware that the longstanding “one-third” limitation is effectively being eliminated under the new RFO framework.
It’s important to note that GSA plans to eventually incorporate it into the Solicitation, giving contractors more flexibility in their orders, but it has not been changed as of Solicitation Refresh #30.
How Can I Get the OLM SIN?
The OLM SIN is not proposed when submitting an offer to GSA. Instead, GSA contractors will receive a Mass Modification after the GSA Schedule award which will add the OLM SIN to the contract if accepted. If this Mass Modification has been rejected, you can add the OLM SIN through a modification in eMod.
You can only provide Order Level Materials (OLMs) through your GSA Schedule if the OLM SIN is on your GSA Schedule. Once on your Schedule, sales through the OLM SIN must be reported just as sales under other SINs are. If you’re looking for more context and assistance on reporting GSA sales, the Vendor Support Center has more information on what a GSA sale is.
Contractors are still required to ensure Trade Agreements Act (TAA) compliance for all OLM items. If you are selling OLMs in support of a Cooperative Purchasing eligible SIN, then the OLM items used in support of that SIN are also Cooperative Purchasing eligible.
You also want to make sure to include SIN OLM in your GSA Advantage! pricelist, even though it will not have any specific line items. Since the supplies and services are to be determined depending on the actual task order, this SIN will not have any specified line items, supplies, or services listed underneath it.
Managing Your GSA Schedule
With the new and upcoming changes to be implemented in the MAS Solicitation, it’s important that all contractors stay compliant with their GSA Schedules. If you have any questions about SINs and your GSA Schedule, be sure to check out our internal blog on choosing the right SIN for your company, or explore our resources on how to obtain a GSA Schedule. For any questions you may have regarding SIN OLM, or if you’re unsure if you need help managing your GSA Schedule, please don’t hesitate to reach out! We’re happy to provide our guidance.
