FAR Part 15 vs Part 13: which process are you bidding?
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Federal buyers do not use one process for every purchase. Two chapters of the Federal Acquisition Regulation shape most of the set-aside work small businesses see on SAM.gov: FAR Part 13 (simplified acquisition procedures) and FAR Part 15 (contracting by negotiation). Knowing which regime covers a notice tells you how long the response may be, what evaluation looks like, whether discussions are likely and how formal a protest or debrief will feel. This guide compares the two for practical bid/no-bid decisions. Threshold dollar figures change by statute and FAR update; always read the clause and the synopsis in front of you rather than memorizing a blog's numbers.
What Part 13 is for
Part 13 exists to reduce administrative cost on smaller buys. It authorizes simplified acquisition procedures so contracting officers can purchase supplies and services more quickly than under full Part 15 negotiation. Micro-purchases sit at the bottom of that stack and generally use the purchase card with even less process. Above the micro-purchase level and up to the simplified acquisition threshold, Part 13 procedures dominate many commercial and routine agency needs.
For small businesses, Part 13 matters because FAR 19.502-2 ties set-aside decisions to these thresholds. Purchases above the micro-purchase threshold and not exceeding the simplified acquisition threshold are to be reserved for small business unless the contracting officer determines there is no reasonable expectation of offers from two or more responsible small businesses that are competitive on price, quality and delivery. That is the everyday engine behind many of the total small business set-asides you see in our total small business listings.
Simplified procedures still require fairness. Contracting officers solicit quotations from a reasonable number of sources, evaluate them, and document the award decision. Quotations under Part 13 are often shorter than Part 15 proposals: price, key technical confirmations, representations and certifications, and proof you can meet the delivery schedule. Oral solicitations still appear for some lower-complexity needs, though written RFQs are common once complexity rises.
What Part 15 is for
Part 15 governs contracting by negotiation when simplified procedures do not apply or when the agency chooses negotiated procedures. It covers the structure of requests for proposals, source selection plans, evaluation factors, competitive ranges, discussions, final proposal revisions and source selection decisions. Best-value tradeoffs and lowest-price technically acceptable models both live here, spelled out in the solicitation.
Part 15 proposals are usually multi-volume: technical, management, past performance, price and sometimes small business participation. Instructions in Section L and evaluation criteria in Section M (or their commercial equivalents) control the response. If the solicitation says ten pages for technical, eleven pages is a self-inflicted risk. Part 15 also frames post-award debriefings that give unsuccessful offerors more structured insight than a typical Part 13 courtesy note.
Side-by-side differences that change your week
**Speed and paperwork.** Part 13 RFQs can close in days or a couple of weeks. Part 15 RFP cycles often run weeks to months with amendments, Q&A and possible discussions. Staff your calendar accordingly.
**Evaluation depth.** Part 13 awards frequently turn on price among technically acceptable quotes, though agencies can evaluate technical factors. Part 15 source selections follow published factors and may trade price against technical merit under a documented plan.
**Discussions.** Part 15 contemplates establishing a competitive range and holding discussions when the agency chooses that path. Part 13 quotations may be clarified, but you should not assume a full discussion round will rescue a noncompliant quote.
**Past performance.** Both regimes care about past performance, but Part 15 commonly uses questionnaires, CPARS references and scored factors. Under Part 13, a contracting officer may rely on thinner documentation for familiar commercial items.
**Protests and debriefs.** Bid protests can arise under either path, yet the richness of debriefings and the documentation trail is usually greater under Part 15. Read the solicitation's stated procedures and GAO or agency protest windows carefully whenever you consider challenging an award.
Commercial products and services
Many Part 13 buys—and a large share of schedule and commercial Part 12 actions—are for commercial products or services. Commercial procedures change clauses, financing and intellectual-property expectations. When a notice says commercial, do not paste a noncommercial Part 15 compliance matrix into your quote without reading the actual clauses. Conversely, noncommercial Part 15 services work may demand certified cost or pricing data thresholds and systems you do not need for a commercial RFQ—another reason to identify the regime early.
How set-asides overlay both parts
Socioeconomic set-asides under FAR part 19 can appear on both simplified buys and Part 15 negotiations. The set-aside decision and the acquisition procedure are related but distinct. A HUBZone Part 15 RFP and a HUBZone Part 13 RFQ both limit competition to certified HUBZone firms, yet the proposal burden differs dramatically. Always read both the set-aside field on SAM.gov and the procedure the solicitation actually uses.
Above the simplified acquisition threshold, FAR 19.502-2 still directs contracting officers to set acquisitions aside for small business when they expect at least two responsible small business offers at fair market prices. Socioeconomic programs get consideration under FAR 19.203 before a general small business set-aside in many situations. Market research you provide through sources sought answers feeds those expectations.
Bid/no-bid heuristics
Treat a short Part 13 RFQ in your exact NAICS, with a set-aside you hold and a place of performance you can reach, as a default "bid" if price competition is honest. Treat a Part 15 RFP that demands deep past performance you cannot map, page-limited technical volumes you cannot staff, and evaluations weighted toward incumbency as a default "no" unless a teaming partner fills the gaps. In between sit Part 15 pursuits worth a pink-team review before pink ink hits the calendar.
Hypothetical example: an EDWOSB bookkeeping firm sees a Part 13 RFQ for financial support services set aside for EDWOSB at a local federal office. The RFQ asks for a price quote, two resumes and three references. That is a fit. The same firm sees a Part 15 RFP for agency-wide audit support with a complex technical evaluation and CPARS-heavy past performance. Without a mentor-protégé JV or a strong prime teaming seat, that RFP is a research project, not a weekend quote.
Reading the SAM.gov notice for clues
SAM.gov synopsis fields and attachments usually reveal the procedure: RFQ versus RFP language, citation of Part 13 or Part 15 clauses, response dates and evaluation narratives. Download the attachments on day one. If the synopsis is thin, the attached solicitation still governs. Our SAM.gov search guide walks through filters; this guide tells you what to do after you open the file.
Building internal playbooks
Keep two response playbooks. The Part 13 playbook emphasizes fast compliance checklists, standard quote templates, and a price desk that can turn around commercial pricing quickly. The Part 15 playbook emphasizes compliance matrices, color team reviews, past performance libraries and pricing narratives. Firms that use one playbook for both regimes either overbuild tiny quotes or underbuild major proposals.
Amendments, Q&A and late changes
Under both regimes, amendments can rewrite evaluation factors, due dates or scope after you have started drafting. Assign someone to watch SAM.gov for amendments daily while a live solicitation is open. Part 15 Q&A periods are often your only chance to expose ambiguous requirements; unanswered ambiguities become proposal risk. Part 13 RFQs may have shorter or informal Q&A—still ask in writing when a missing wage determination or delivery address would change price.
If an amendment arrives late and you cannot comply, document the decision to no-bid. Chasing a transformed requirement with a recycled draft is how teams miss mandatory updates and get rejected before evaluation.
Training your team on the difference
Walk proposal coordinators through one sample Part 13 RFQ and one sample Part 15 RFP side by side every quarter. Have them list required volumes, page limits, due dates and evaluation factors. The exercise builds instinct faster than another slide deck about the FAR. Pair it with our set-aside overview so new staff connect procedure and eligibility.
Checklist before you download the full package
Ask: Is this an RFQ or an RFP? Does the synopsis cite Part 13, Part 15 or commercial Part 12 procedures? What is the set-aside type? Which NAICS and size standard apply? When is the due date, and are amendments already posted? Can we meet mandatory certifications and place-of-performance constraints? If any answer is murky after reading the attachments, pause the proposal clock until the murk is gone. Most lost weekends on federal bids come from starting to write before answering those questions.
When thresholds or clause numbers in a synopsis look unfamiliar, open the live FAR text on acquisition.gov rather than relying on memory or an outdated training slide. The regulation changes; your bid file should cite what the solicitation actually incorporates.
Helpful reading
Further reading on acquisition procedures: FAR simplified acquisition books (Affiliate link); winning negotiated federal contracts books (Affiliate link). As an Amazon Associate I earn from qualifying purchases.
Frequently asked questions
- Is every small SAM.gov notice under Part 13?
- No. Set-asides appear under both simplified acquisition procedures and Part 15 negotiated procurements. Read the solicitation's stated procedures.
- Why does the procedure matter if I already qualify for the set-aside?
- Eligibility gets you into the competition; the procedure decides proposal size, timeline, evaluation style and debrief expectations.
- Where do micro-purchases fit?
- Micro-purchases sit below simplified acquisitions and generally use even lighter procedures such as the government purchase card. They are usually not the multi-page RFPs this guide contrasts with Part 15.
SetAside Signal is an independent publication, not a government agency, and this isn't legal advice. Rules change, so confirm details with the official sources: SBA (sba.gov), SAM.gov and the FAR at acquisition.gov. Last updated .