Small business set-asides: what they are and what they are not

A set-aside limits who may compete

When a federal notice says "total small business set-aside", the agency has restricted the competition to small businesses. Larger firms cannot bid on it. That is the whole mechanism: a set-aside does not lower the requirements of the job, does not guarantee anyone a contract, and does not excuse a late or incomplete bid. It changes who you are competing against.

For a small trade contractor that matters more than it sounds. On set-aside work you are bidding against firms your own size.

How much federal work is set aside

More than most people expect, and the rule is written into the Federal Acquisition Regulation. Under FAR 19.502-2, a purchase with an expected value above the micro-purchase threshold and not over the simplified acquisition threshold is set aside for small business unless the contracting officer determines there is no reasonable expectation of offers from two or more responsible small businesses. Since October 1, 2025 those thresholds are $15,000 and $350,000. Above that range, a contracting officer sets a purchase aside when offers are expected from at least two responsible small businesses at fair market prices - what people in the business call the "rule of two".

That range, $15,000 to $350,000, is where a lot of the work a small contractor can actually perform sits: a year of grounds maintenance at a federal building, a roof repair, a janitorial contract for one facility.

Are you "small"?

Small is not a feeling, and it is not one number. The Small Business Administration sets a size standard for each industry, by NAICS code, as either average annual receipts or number of employees. The notice names the NAICS code for that purchase, and the size standard for that code is the one that applies to that bid. A firm can be small for one purchase and not for another.

You state your size yourself when you register in SAM.gov; this part is self-certified, and a competitor or the agency can challenge it. Look your codes up in the SBA's size standards before you rely on it. Registering in SAM is covered here.

The four programs with their own set-asides

Beyond the general small business set-aside, some purchases are reserved for firms in one of four SBA programs. Unlike size, these are not self-certified: the firm has to be certified by the SBA through its online certification system before it can win a contract reserved for that program. The SBA's contracting assistance programs page is the starting point for each.

• 8(a) Business Development. For small businesses owned and controlled by socially and economically disadvantaged individuals. Participation is for a limited term.
• Women-Owned Small Business (WOSB), and the Economically Disadvantaged version (EDWOSB). For small businesses owned and controlled by women, in industries where the SBA has found women-owned firms underrepresented.
• Service-Disabled Veteran-Owned Small Business (SDVOSB). For small businesses owned and controlled by service-disabled veterans.
• HUBZone. For small businesses located in a historically underutilized business zone that also employ people who live in one.

Each program has ownership, control and other tests that this page does not try to summarize, and they are changed from time to time. The SBA decides who is certified. We do not, and nothing here says that your firm is or is not eligible for any of them.

How to tell what a notice is

A federal notice states its set-aside on the first page, and SAM.gov carries it as a field you can filter on. The common values are no set-aside (open to everyone), total small business, partial small business, and one of the four programs. On BusyBids the set-aside the notice names is shown with the bid.

Two mistakes are worth avoiding. Bidding on work reserved for a program you are not certified in wastes the bid: the agency cannot award it to you however good the price is. And skipping work marked "total small business" because you assumed it needs a special certificate throws away the largest category of all - it needs only that you are small under that notice's NAICS code.

State and local programs are separate

States, cities and authorities run their own programs, under their own names and their own rules: minority- and women-owned business programs, local business preferences, veteran programs. A federal certification usually does not carry over, and a state certification means nothing on a federal bid. Some are goals for the prime contractor's subcontracting instead of a restriction on who may bid, which makes them a way in for a small firm as a subcontractor. Programs also change: Texas's long-standing HUB program, for example, is now a program for service-disabled veterans, described in our Texas guide. Read what the particular notice asks for.

Is certification worth the paperwork?

Certification takes real time, and it only pays off if agencies you can reach actually buy your kind of work through that program. Before applying, look at a few months of notices in your trade and area and count how many are reserved for it. If the answer is several a month, apply. If it is none, the general small business set-aside, which needs no application, is where your work is.