Federal agencies can award 8(a) sole source contracts directly to a certified disadvantaged small business without competitive bidding, as long as the estimated contract value stays below $8.5 million for manufacturing work or $5.5 million for everything else. Those thresholds took effect October 1, 2025, replacing the prior $7 million and $4.5 million figures.1Acquisition.GOV. Threshold Changes – October 1st, 2025 Every sole source award has to be accepted by the Small Business Administration before the contract is finalized, and the awardee has to follow specific rules on price, subcontracting, and follow-on work.
What Counts as an 8(a) Sole Source Award
The 8(a) Business Development Program serves small businesses owned by socially and economically disadvantaged individuals.2U.S. Small Business Administration. 8(a) Business Development Program A sole source award under the program means a contracting officer picks one specific 8(a) firm for a contract instead of opening the requirement to bidders. The legal authority sits in Section 8(a) of the Small Business Act, which lets agencies contract with the SBA and have SBA subcontract the work to the chosen 8(a) participant.3Office of the Law Revision Counsel. 15 USC 637 – Additional Powers In most cases today, agencies use a delegated “direct award” approach so the contract goes straight to the firm, but SBA still reviews and accepts the requirement first.
Sole source is the alternative to competitive 8(a) set-asides, where multiple 8(a) firms bid against each other. Agencies use the sole source path when the estimated value falls below the competitive thresholds, or when there aren’t enough eligible firms to expect real competition at a fair price.
Dollar Thresholds
The competitive thresholds are the central rule. As of October 1, 2025:
- $8.5 million for contracts assigned a manufacturing NAICS code
- $5.5 million for all other contracts, including services, construction, and supply
The threshold applies to the total estimated value of the contract, including all option years.4eCFR. 13 CFR 124.506 Above the applicable threshold, the requirement generally has to be competed among eligible 8(a) firms. SBA can still accept a higher-value requirement as sole source if there’s no reasonable expectation that at least two eligible firms will bid at a fair price.5Acquisition.GOV. FAR 19.805-1 General
Agencies can’t split a large requirement into smaller pieces to duck under the sole source threshold and hand everything to one firm.4eCFR. 13 CFR 124.506
The Ten-Percent Buffer
When a requirement is accepted as sole source based on an estimate below the threshold, the award stays valid even if the negotiated price climbs above the threshold, provided the final price doesn’t exceed it by more than ten percent. A services contract estimated at $5.2 million and accepted as sole source can be awarded at up to roughly $6.05 million without triggering a competition requirement.4eCFR. 13 CFR 124.506
Higher-Dollar Justification Triggers
Additional oversight applies at higher values. Civilian agencies cannot award a sole source 8(a) contract exceeding $25 million without a written justification and formal approval under the Federal Acquisition Regulation. For Department of Defense agencies, the justification trigger is $100 million.6Government Accountability Office. DOD Small Business Contracting – Use of Sole-Source 8(a) Contracts Over $22 Million Has Increased
Which 8(a) Firms Can Receive a Sole Source Award
Not every 8(a) participant qualifies for a given sole source award. The firm has to be active in the program, in good standing on SBA reporting and business plan requirements, and within its nine-year term.2U.S. Small Business Administration. 8(a) Business Development Program The work has to fall within the firm’s approved NAICS codes as listed in its business plan. The contracting officer also has to determine that the firm is a responsible contractor with the financial resources, personnel, equipment, and track record to actually perform.
Per-Firm Cap
Individual 8(a) firms face a ceiling on total 8(a) contract value. A participant that has received a combined total of competitive and sole source 8(a) contracts exceeding $168.5 million during its program term becomes ineligible for further sole source awards. It can still compete for competitive 8(a) contracts. The cap doesn’t apply to firms owned by Indian Tribes, Alaska Native Corporations, Native Hawaiian Organizations, or Community Development Corporations.7eCFR. 13 CFR 124.519
Entity-Owned Firm Exceptions
Firms owned by Indian Tribes and Alaska Native Corporations can receive sole source 8(a) contracts above the standard competitive thresholds, with no ceiling short of the $25 million civilian or $100 million DoD justification triggers.4eCFR. 13 CFR 124.506 They’re also exempt from the $168.5 million per-firm cap.7eCFR. 13 CFR 124.519
Native Hawaiian Organization-owned firms have a narrower version of this authority. They can receive sole source awards above the competitive thresholds only for Department of Defense contracts; for civilian agencies, they follow the same thresholds as individually owned 8(a) firms.4eCFR. 13 CFR 124.506
How the Award Gets Made
The contracting officer identifies a requirement suited to the 8(a) program, decides sole source is appropriate, and prepares an offering letter to SBA. The letter includes the scope of work, estimated contract value with options, NAICS code, a justification for selecting the specific firm, and a determination that the price will be fair and reasonable.8U.S. General Services Administration. 8(a) Sole Source Offer Letter Template
SBA reviews the letter to confirm the nominated firm is eligible, that the work aligns with the firm’s business plan and NAICS codes, and that the requirement fits the program’s developmental purpose. Response timelines run by contract value:
- At or below the simplified acquisition threshold ($350,000), SBA has two business days. Silence past that lets the agency assume acceptance and proceed.
- Above the simplified acquisition threshold, SBA has ten business days. If no response comes, the agency can escalate to the Associate Administrator for Business Development, who then has five business days before the agency may assume acceptance.
- Where SBA has delegated contract execution authority to the agency, silence for five business days counts as acceptance.9eCFR. 13 CFR 124.503
After SBA accepts the requirement, the 8(a) firm negotiates price and terms with the contracting officer, and the contract is awarded either directly under delegated authority or through the traditional structure with SBA as prime.
Fair Market Price
Every 8(a) sole source contract has to be awarded at a fair market price, and the procuring agency, not SBA, is responsible for determining what that price is. For a new requirement, the contracting officer runs a cost or price analysis using prevailing market conditions, commercial prices for comparable work, and data from other agencies. For follow-on work with pricing history, the officer adjusts recent award prices for changes in scope, quantities, and labor costs. SBA can ask for a written explanation of the agency’s pricing methodology, and the agency has ten working days to respond.10eCFR. 13 CFR 124.511
Joint Ventures with a Mentor
An 8(a) firm that can’t handle a sole source requirement on its own can form a joint venture, often with a mentor under the SBA Mentor-Protégé program. The rules are strict and SBA has to approve the joint venture before any sole source award. The joint venture agreement must designate the 8(a) firm as managing venturer and name a specific employee of the 8(a) firm as responsible manager. If the venture is a separate legal entity, the 8(a) participant must own at least 51 percent. The 8(a) partner has to perform at least 40 percent of the venture’s work, and that work can’t be limited to administrative tasks.11eCFR. 13 CFR 124.513
SBA will reject an arrangement where the 8(a) firm is contributing nothing but its certification. Any changes to the agreement after approval also need SBA sign-off. When the mentor is SBA-approved, the joint venture is not treated as affiliated with the mentor for size determination purposes, which keeps the venture eligible as small.12eCFR. 13 CFR 124.520
Subcontracting Limits After Award
Winning a sole source contract does not let the 8(a) firm hand the work to someone else. The awardee must comply with limits on how much can go to subcontractors that aren’t “similarly situated” (meaning subs that also hold the relevant small business status):
- Services (except construction): no more than 50 percent to non-similarly-situated subs.
- Supplies or products: same 50 percent limit, with the cost of materials excluded from the calculation.
- General construction: no more than 85 percent to non-similarly-situated subs, meaning the 8(a) firm and any similarly situated subs must perform at least 15 percent.
- Specialty trade construction: no more than 75 percent to non-similarly-situated subs.
For mixed contracts, the limit follows the NAICS code assigned to the contract, and the percentage applies to that portion of the award.13eCFR. 13 CFR 125.6 When a firm supplies products it did not manufacture, the nonmanufacturer rule applies, and the firm must supply items made by a small business.14Acquisition.GOV. FAR 19.505
Follow-On Work Stays in the Program
Once a requirement has been awarded through the 8(a) program, the follow-on contract for that same work has to stay in the program. This is the “once 8(a), always 8(a)” rule, and it stops agencies from using an 8(a) award to develop a requirement and then pulling it out once the work is established.15eCFR. 13 CFR 124.504
An agency that wants to release a follow-on requirement from the 8(a) program has to submit a written request to SBA’s Associate Administrator for Business Development and get written concurrence. SBA weighs whether the agency has met its small disadvantaged business goal, whether other small business goals would be better served by releasing the work, and how critical the contract is to the current 8(a) performer’s business development. Even when SBA agrees to release a requirement, the agency has to commit to a small business set-aside, HUBZone, service-disabled veteran-owned small business set-aside, or another small-business-focused strategy. SBA will not release work into unrestricted competition.16eCFR. 13 CFR Part 124 Subpart A
Protests Are Limited
Competitors have very limited ability to challenge an 8(a) sole source award. Neither other 8(a) participants nor any outside party can protest the eligibility of the nominated firm or its size status in connection with a sole source 8(a) contract, whether the protest is filed with SBA or through any other administrative forum.17Acquisition.GOV. FAR 19.813 This is a sharp difference from competitive 8(a) set-asides, where losing bidders can file size protests. In a sole source award, that avenue is closed because the agency chose the firm directly and SBA verified eligibility before acceptance.
Recent Changes to Eligibility
The pool of firms available for sole source awards has changed. Following the 2023 federal court decision in Ultima Services Corp. v. Department of Agriculture, SBA eliminated its longstanding presumption that members of certain racial groups are socially disadvantaged. All applicants now have to submit detailed personal narratives establishing social disadvantage, describing specific incidents of bias, when and where they occurred, and how they affected the applicant’s business opportunities.
SBA has also stepped up scrutiny of existing participants. In early 2026, the agency moved to terminate over 150 8(a) firms in Washington, D.C. following eligibility reviews and stated that the program would no longer accept applicants “solely on the basis of race.”18U.S. Small Business Administration. SBA Moves to Terminate Over 150 8(a) Firms in Washington DC Following Eligibility Review Firms currently in the program should confirm their eligibility documentation reflects the updated requirements before pursuing any pending or future sole source opportunity.