The FAR is the primary regulation governing the federal procurement of supplies and services. It is jointly issued by the Department of Defense, the General Services Administration, and NASA, and applies to all federal executive agencies with limited exceptions. The FAR is organized into 53 Parts plus subpart and section numbering, covering everything from contracting authority to contract types, socioeconomic programs, and contract administration.
For most small contractors, a handful of FAR Parts carry disproportionate weight. FAR Part 15 governs negotiated procurements (most professional services). FAR Part 19 covers small business programs including 8(a), HUBZone, SDVOSB, and WOSB. FAR Part 12 governs commercial item acquisition. FAR Part 6 defines competition requirements and the limited circumstances for sole-source. The 2025 FAR rewrite — the most significant FAR overhaul in two decades — restructured several Parts to streamline acquisition policy, but the core small-business mechanics remained intact. Agency supplements such as DFARS for DoD and NFS for NASA layer additional rules on top of the FAR for specific procurement actions.
For small contractors, FAR fluency is an operational requirement, not optional. Compliance failures show up in proposal rejections, contract modifications, and post-award disputes. The contracting officer cites FAR clauses to justify decisions, and bidders need to read the same language to understand their obligations. Reading the relevant FAR Parts at least once is the minimum entry cost for credible federal contracting; staying current with revisions is the ongoing investment.