The Federal Acquisition Regulation (FAR) is the primary rulebook for how executive agencies buy goods and services. It is published at acquisition.gov and in Title 48 of the Code of Federal Regulations. You do not need to read it all. You need to know where the rules you will meet live, and how to look up a clause when it appears in a contract.
Note: the FAR has been undergoing a government-wide rewrite (the "Revolutionary FAR Overhaul") since 2025, which is changing wording and in some cases structure. Always check the version in effect on acquisition.gov and the clauses in your actual solicitation.
How the FAR is organized
The FAR is divided into parts, subparts, sections and paragraphs. A citation like "FAR 15.305(a)(2)" means Part 15, section 15.305, paragraph (a)(2). Clauses that go into contracts live in Part 52 and are numbered to match the part they implement — for example, 52.219-14 implements a Part 19 rule.
The parts small businesses meet most
- Part 2 — Definitions. Thresholds such as the micro-purchase and simplified acquisition thresholds are defined here and adjusted for inflation from time to time.
- Part 4 — Administrative matters. SAM.gov registration requirements (subpart 4.11) and safeguarding of contractor information systems (subpart 4.19).
- Part 5 — Publicizing contract actions. When and how agencies post opportunities on SAM.gov.
- Part 8 — Required sources. Including the GSA Multiple Award Schedule (subpart 8.4).
- Part 9 — Contractor qualifications. Responsibility determinations: whether you have the resources, record and integrity to perform.
- Part 10 — Market research. Why agencies post sources sought notices and RFIs.
- Part 12 — Commercial products and services. Streamlined rules many small firms sell under.
- Part 13 — Simplified acquisition procedures. Faster buying for smaller dollar amounts — a common entry point.
- Part 14 — Sealed bidding. Used often in construction.
- Part 15 — Contracting by negotiation. RFPs, evaluation factors, discussions, debriefings.
- Part 16 — Types of contracts. Fixed-price, time-and-materials, cost-reimbursement, IDIQs.
- Part 19 — Small business programs. Set-asides, size, 8(a), HUBZone, SDVOSB, WOSB, limitations on subcontracting.
- Part 22 — Labor laws. Service contract and construction wage rules.
- Part 32 — Contract financing. Payment, invoicing and prompt payment.
- Part 33 — Protests, disputes and appeals.
- Part 42 — Contract administration. Including past performance evaluations (subpart 42.15).
- Part 49 — Termination of contracts.
- Part 52 — Solicitation provisions and contract clauses.
Agency supplements
Many agencies add their own rules on top of the FAR. The largest is the Defense Federal Acquisition Regulation Supplement (DFARS) for the Department of Defense. Others include the VA Acquisition Regulation (VAAR), the GSA Acquisition Regulation (GSAR) and the Homeland Security Acquisition Regulation (HSAR). Supplements are also on acquisition.gov. A clause starting with 252 is DFARS; 852 is VAAR; 552 is GSAR.
Clauses worth recognizing early
Incorporated by reference
Solicitations often list clauses by number and title only — "incorporated by reference." They are just as binding as if printed in full. Look them up.
Commercial terms
FAR 52.212-4 (contract terms for commercial products and services) and 52.212-5 (required statutes and executive orders) appear in many commercial contracts.
Small business clauses
Set-aside clauses and the limitations on subcontracting (52.219-14) control how much work you must do yourself.
Cybersecurity
FAR 52.204-21 requires basic safeguarding of covered contractor information systems. Defense contracts may include DFARS 252.204-7012 and Cybersecurity Maturity Model Certification (CMMC) requirements, which DoD has been phasing into contracts. Know what your contract requires before you sign.
Telecommunications restrictions
Provisions such as FAR 52.204-24 through 52.204-26 deal with covered telecommunications equipment. You will usually make a representation about this in SAM.gov or your offer.
Your rights when things go wrong
Debriefings
After a negotiated award, unsuccessful offerors can request a debriefing within a short deadline (see FAR 15.505 and 15.506). Debriefings are free lessons; request them.
Protests
If you believe an agency broke the rules, you can protest to the agency, the Government Accountability Office (GAO), or the Court of Federal Claims. GAO deadlines are short — generally counted in days. See FAR Part 33 and GAO's bid protest page. Consider getting qualified legal help.
Size and status protests
Size and set-aside status challenges go to SBA under its own rules and deadlines.
How to look things up fast
- Search acquisition.gov by clause number or keyword.
- When a solicitation cites a clause with a date (for example, "(NOV 2021)"), make sure you read that version.
- Free counseling is available from APEX Accelerators and SBA resource partners listed on sba.gov.
Reading a clause the first time
When you meet an unfamiliar clause, ask four questions: Does it apply to this contract (check its prescription, the "as prescribed in" reference near the top)? What does it require me to do or refrain from doing? Does it flow down to my subcontractors? And does it change my price or schedule? Write the answers in your compliance matrix so nothing is lost between proposal and performance.
Frequently asked questions
Do I need to read the whole FAR?
No. Learn the parts listed above and look up specific clauses as they appear in solicitations you bid on.
What is the DFARS?
The Defense Federal Acquisition Regulation Supplement — Department of Defense rules that add to the FAR. DoD contracts include both FAR and DFARS clauses.
What does "incorporated by reference" mean?
The clause is part of the contract even though only its number and title are listed. Its full text is on acquisition.gov.
Where is the current FAR published?
On acquisition.gov, and officially in Title 48 of the Code of Federal Regulations.
This guide is general information, not legal advice. Rules change — always check the solicitation and the official sources linked here.