GSA MAS 541810 & 541613: How Federal Agencies Buy Marketing & Consulting Services

Executive Summary

• Direct answer: GSA MAS SIN 541810 covers advertising agency services (campaign creation, media buying, digital marketing, social media management, creative production), while SIN 541613 covers marketing consulting services (go-to-market strategy, communications planning, brand strategy, audience research, marketing plan development). Both fall under the GSA Professional Services Large Category, which generated more than $12 billion in sales in FY2025.
• Key insight: Selecting the wrong SIN creates compliance risk under FAR 8.402(f), can force open-market procurement procedures, and delays award timelines. A single requirement that spans both strategy and execution should address both SINs in the acquisition strategy.
• RC Strategies perspective: RC Strategies holds GSA MAS contract coverage under both SIN 541810 and SIN 541613, with SBA 8(a) certification (CAGE: 9GCC5) through 2033, enabling sole-source awards up to $4.5 million and single-contractor continuity from strategy through campaign execution.
• Actionable takeaway: Before issuing an RFQ, confirm whether your requirement is fundamentally about executing advertising (541810), planning marketing strategy (541613), or both. Use the comparison table in this article to classify your scope accurately and structure your SOW accordingly.

A contracting officer needs to put a marketing support contract on the street. The requirement includes both a go-to-market communications strategy and paid media execution. She searches GSA Advantage, finds SIN 541810, finds SIN 541613, and sees descriptions that appear to overlap. She picks one, guesses wrong, and now has a compliance question on her hands. This happens. SIN 541810 covers advertising and campaign execution; SIN 541613 covers marketing strategy and consulting. Understanding that line is not an academic distinction: it determines which contract vehicle you use, how you structure your SOW, and how quickly you can get a qualified team on contract.

What Is the GSA Multiple Award Schedule?

The GSA Multiple Award Schedule is a governmentwide indefinite-delivery, indefinite-quantity (IDIQ) contract vehicle. It is not a blanket purchase order, not a catalog, and not a simplified purchasing mechanism. The distinction matters because misunderstanding the contract type is where budget missteps and acquisition delays begin.

Contract Structure and Duration

MAS contracts are awarded for an initial five-year period with three five-year option periods, totaling 20 years of potential contract performance. That duration signals sustained vetting, not a one-time approval. GSA evaluates contractor qualifications, pricing, and past performance before award and monitors compliance throughout the life of the contract.

The Core Acquisition Benefit

The single most important benefit of the MAS for ordering activities is pricing. GSA has already determined the prices of supplies and fixed-price services to be fair and reasonable. As a result, ordering activities are not required to make a separate determination of fair and reasonable pricing under FAR Subpart 8.4. That removes an entire layer of price analysis from the contracting officer's workload.

Program Scale

In fiscal year 2025, the GSA MAS program closed with more than $50.6 billion in government purchases across 300-plus Special Item Numbers. More than 14,579 companies held a GSA MAS contract that year. The Professional Services Large Category alone accounted for more than $12 billion in sales with more than 5,000 companies holding contracts in that category.

The MAS exists to reduce the administrative burden of individual procurements. It gives contracting officers a pre-vetted, pre-priced pool of contractors they can access without starting from scratch on every requirement. Within the MAS, marketing and advertising services fall under two primary SINs, and the distinction between them matters more than most briefs acknowledge.

SIN 541810: Advertising and Integrated Marketing Services

SIN 541810 is the execution SIN. It covers full advertising agency services: campaign creation and management, digital marketing, media planning and buying, social media management, creative production, and integrated campaign delivery. This SIN is tied to NAICS 541810 (Advertising Agencies), and contracting officers cross-reference NAICS and SIN when evaluating vendor eligibility.

What SIN 541810 Covers

The scope of 541810 includes the work that happens once a strategy exists and the program needs to execute. A practical example: a military branch has completed a strategy brief for a recruiting advertising initiative. The team now needs to build ad creative, buy media across digital and traditional channels, manage social media accounts, and report on campaign performance. That is a 541810 requirement.

RC Strategies' advertising and media buying services operate directly under this SIN. RC Strategies holds primary NAICS 541810 and has executed under this SIN for programs including NAVSEA recruiting campaigns and National Guard digital media efforts.

The 541810ODC Companion SIN: Handling Media Buys and Production Costs

The 541810ODC companion SIN is a critical element that contracting officers and program managers frequently overlook. When a statement of work includes media buys, print production, or other pass-through costs, those costs must be quoted under 541810ODC, not under the base SIN and not as open-market items.

The compliance implication is direct. Per FAR 8.402(f), any additional other direct costs the contractor proposes that are not included under either SIN 541810ODC or OLM are considered non-MAS or "open market" items, and all regulatory procedures for advertising, competition, and evaluation apply. Most contracting officers do not want to receive quotes containing open-market items because they trigger additional procedural requirements. Quoting media costs correctly under 541810ODC avoids that burden entirely.

SIN 541613 covers the other side of the equation: what happens before the campaign launches.

How Federal Agencies Buy Marketing Services Through MAS

The ordering procedures under FAR 8.4 are designed to be faster and less administratively burdensome than full and open competition. Understanding the mechanics helps both contracting officers and program managers set realistic timelines and avoid unnecessary procedural steps.

Ordering Procedures Under FAR 8.4

Before placing an order, the ordering activity must consider reasonably available information. In practice, this means surveying at least three schedule contractors through GSA Advantage!, reviewing at least three pricelists, or requesting quotes from at least three contractors under FAR 8.405-1.

The ordering thresholds create two distinct paths:

• Orders under $250,000 (Simplified Acquisition Threshold): A contracting officer can place an order with a single schedule holder after reviewing the schedule. This is the efficiency that makes MAS attractive for smaller task orders and time-sensitive requirements.
• Orders above $250,000: Agencies issue task orders through GSA eBuy, evaluate responses on price, technical capability, and past performance, and select best value.

One regulatory development worth noting: Executive Order 14275, signed in April 2025, initiated the Revolutionary FAR Overhaul (RFO), which is actively restructuring ordering procedures. FSS procedures may move from FAR Subpart 8.4 to GSAR Subpart 538.71. Contracting officers should monitor GSA acquisition letters for updates to ordering guidance.

Contracting officers evaluating RC Strategies for a task order can download our capability statement for a full view of our schedule, SINs, and past performance.

MAS vs. Open-Market Procurement: What It Actually Costs the CO

When buying off-schedule, FAR Parts 13 or 15 apply. That means separate synopsization requirements, a full and open competition process, independent price analysis, and significantly more administrative time. MAS task orders can move from requirement to award in weeks. Full and open competition under FAR Part 15 can take months.

The data reinforces the preference: most federal agency contracting officers actively avoid receiving quotes that contain open-market items because those items trigger all regulatory procedures for advertising, competition, and evaluation under FAR 8.402(f). Keeping the entire scope on-schedule eliminates that burden.

Why Buying Officers Prefer Schedule Holders

The preference is not abstract. It is grounded in measurable acquisition advantages that directly affect a contracting officer's workload and a program manager's timeline.

Pre-Negotiated Pricing and Faster Timelines

Because GSA has already determined prices to be fair and reasonable, ordering activities can skip the independent cost/price analysis step. That single procedural elimination can compress the award timeline by weeks. Combined with the single-holder order authority for requirements under $250,000, a CO can move from requirement identification to contractor engagement faster than through any other full-competition pathway.

Pre-Vetted Contractors and Small Business Credit

GSA reviewed the contractor's qualifications, past performance, and pricing before awarding the schedule. That vetting transfers to the ordering activity, reducing due diligence time. Beyond vetting, using a GSA schedule small business (especially an 8(a)-certified firm) helps agencies meet their small business utilization targets, which are tracked, reported, and tied to agency performance evaluations.

Consider the scale: small businesses contributed over $18 billion, representing 35.25% of all MAS sales in FY2024. The small business ecosystem on the schedule is significant, and agencies rely on it to meet mandated goals.

The 8(a) Sole-Source Advantage

RC Strategies is a schedule holder that also holds 8(a) certification. That combination creates the fastest path from requirement to award in federal marketing. Sole-source 8(a) awards up to $4.5 million eliminate the competitive step entirely when the requirement qualifies. For program managers facing urgent timelines on recruiting campaigns, public outreach initiatives, or communications program launches, that speed is not a convenience. It is an operational necessity.

The acquisition advantages extend beyond direct awards. For prime contractors building a team, a schedule-holding subcontractor changes the math entirely.

How Prime Contractors Use Schedule-Holding Subs to Accelerate Acquisition

Prime contractors pursuing federal marketing requirements face a recurring challenge: they need specialized advertising and communications capability, but building that capability in-house is not always practical or cost-effective. A qualified subcontractor with the right credentials solves that problem.

CTAs vs. Prime/Sub Arrangements

A Contractor Team Arrangement (CTA) is a cooperative agreement between two or more GSA MAS contract holders that allows them to combine products or services into one offering, enabling them to compete for an order they would not have qualified for individually. A systems integrator holding a different SIN can team with a marketing firm holding 541810 and 541613 to offer an integrated solution spanning communications and technology.

The prime/sub structure is the more common path. A large prime contracts with RC Strategies as a marketing and communications subcontractor. The prime uses its own schedule or a GWAC/IDIQ for the overall award; RC Strategies executes the marketing scope as a sub. Small businesses can subcontract on the MAS without needing their own schedule, since all work is conducted through the prime contractor's schedule. However, when both the prime and sub hold schedules, compliance is cleaner.

One limitation to note: small business primes must perform at least 50% of service contract work themselves to avoid SBA affiliation and ostensible subcontractor violations. This makes sub relationships with firms like RC Strategies attractive because the sub adds specialized marketing capability the prime does not have in-house, without displacing the prime's core work.

The 8(a) + GSA MAS Speed Advantage

For primes, the value proposition of an 8(a)-certified, schedule-holding subcontractor is specific and measurable:

• Sole-source eligibility: RC Strategies' 8(a) certification allows sole-source awards up to $4.5M without competitive bidding, a distinct acquisition path that gives primes and agencies multiple rapid-award options.
• Long certification runway: 8(a) certification through 2033 provides stability for multi-year programs. A prime building a teaming arrangement gets a partner with decade-long sole-source eligibility.
• Verified subcontracting credit: Adding RC Strategies as an 8(a) sub provides verified small business subcontracting credit toward the prime's small business subcontracting plan goals.

RC Strategies functions as an SBA 8(a)-certified small business subcontractor with prime experience across recruiting marketing, advertising and media buying, public outreach, and strategic communications programs. Past performance includes NAVSEA recruiting campaigns and Army National Guard digital media programs. Prime contractors evaluating RC Strategies as a teaming partner for federal marketing can review our full teaming profile.

Key Takeaways

The distinction between SIN 541810 and SIN 541613 is not a technicality. It determines contract vehicle selection, SOW structure, compliance posture, and award speed. Getting it right at the requirements stage prevents delays and compliance questions downstream.

Decision PointActionRequirement is campaign execution, media buying, or creative productionUse SIN 541810 (and 541810ODC for pass-through costs)Requirement is marketing strategy, communications planning, or brand advisoryUse SIN 541613Requirement spans both strategy and executionAddress both SINs in the acquisition strategy; select a contractor holding bothRequirement includes media buys or production costsQuote under 541810ODC to avoid open-market compliance burdenTimeline is urgent and requirement is under $4.5MEvaluate 8(a) sole-source path with a qualified schedule holder

RC Strategies holds GSA MAS contract coverage under both SIN 541810 and SIN 541613, with SBA 8(a) certification (CAGE: 9GCC5) through 2033. Whether your program needs a go-to-market strategy, a full-scale advertising campaign, or both, we are credentialed, on schedule, and ready to respond. Contact RC Strategies to discuss your requirement.