Markets•9 min read

US Government Contracts: What Suppliers Need to Know About SAM.gov and Federal Buying

Sidona Intelligence

September 24, 2026

US Government Contracts: What Suppliers Need to Know About SAM.gov and Federal Buying

The US federal market is the largest public buyer in the world — and one of the easiest to misunderstand. Notices live on SAM.gov. Registration is mandatory. Evaluation rules differ from CanadaBuys. Set-asides, NAICS codes, and FAR clauses decide who can even open the door. Whether you are a US firm getting serious about federal work or a Canadian supplier testing the southern market, these are the facts that matter before you burn a week on the wrong solicitation.

You still submit on the official portal

Sidona helps you find and read opportunities. Registration, proposals, and awards still go through SAM.gov (and the issuing agency’s process).

Market facts at a glance

Fact	Why it matters
SAM.gov is the federal notice board	Most open competitive federal solicitations post here. If you only watch agency websites, you will miss work.
Unique Entity ID (UEI) replaces DUNS	You need an active SAM registration and UEI before most awards and many proposal submissions.
NAICS codes drive eligibility and set-asides	Wrong NAICS = wrong alerts and often wrong set-aside lane.
FAR / DFARS clauses are not optional reading	Mandatory requirements hide in clauses and attachments — not just the cover page.
Set-asides shrink the competitive field	Small business, 8(a), WOSB, SDVOSB, HUBZone and others change who can bid.

What US federal buyers actually purchase

IT and cyber — cloud, software, network ops, cybersecurity, help desk
Professional services — consulting, engineering, program management, training
Facilities and construction — bases, labs, office renovations, environmental work
Goods and logistics — supplies, maintenance, transportation, warehousing
Defence and security — platforms, sustainment, classified-adjacent support (clearances required)

Registration and identity (do this first)

Before you chase RFPs, finish entity registration in SAM.gov and confirm your UEI is active. Map your primary and secondary NAICS codes to what you actually sell — not every code you wish you sold. If you pursue set-asides, confirm small-business size standards for those NAICS. Canadian firms need a clear US contracting vehicle story (subsidiary, joint venture, or eligible prime/sub structure) and should expect more scrutiny on data location and foreign ownership on sensitive work.

How evaluation usually works

Many federal buys use best-value tradeoffs (technical + price). Others are lowest-price technically acceptable. Past performance, key personnel, and compliance with every mandatory solicitation requirement decide pass/fail long before price. Amendments (amendatory notices) change dates, volumes, and clauses — missing one is a classic disqualification.

What users should watch weekly

New notices in your NAICS and keywords on SAM.gov
Amendments on opportunities you already opened
Sources sought / RFIs — early signals before the formal RFP
Award notices — competitor pricing and active buying agencies
State and local portals if you also sell below the federal layer

Bottom line

US federal procurement rewards registration hygiene, NAICS discipline, and document reading — not keyword luck. Use Sidona to keep SAM.gov opportunities beside your Canadian feed so you do not miss amendments while hopping portals.

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