Plain English, with the citation
Government contracting glossary
50terms a small business actually meets when it bids federal work — explained without jargon, and each one carrying the FAR part, CFR section or statute it comes from so you can check it against the government's own text rather than take our word for it.
How these definitions are sourced
Where a term is defined in law or regulation we cite the actual authority — the FAR section, the CFR part, the statute — and link it. Every dollar figure, percentage and deadline on these pages was read from that cited source on 2026-08-04, and each is published beside its citation and that date. Acquisition thresholds are adjusted for inflation and changed by statute, so a figure repeated from an old article is often wrong; where we could not verify one, we describe the concept without the number instead of guessing. None of this is legal advice.
How the government asks
The documents a buyer publishes and what each one obliges you to do. Getting these apart is the difference between a quote and a binding offer.
- Responsive bid
A responsive bid is one that conforms in all material respects to the invitation for bids — a test applied to the paperwork at bid opening — as distinct from responsibility, which is a judgement about whether the bidder can actually perform.
- RFI
Request for Information
An RFI is market research: the government is asking industry what is available and what it would take, and FAR 15.201(e) says an RFI is used when the government does not intend to award a contract on the basis of the responses.
- RFP
Request for Proposal
An RFP is a federal solicitation that asks for a binding proposal on work where the buyer intends to weigh factors other than price alone, and it is issued under the negotiated-procurement rules in FAR Part 15.
- RFQ
Request for Quotation
An RFQ asks vendors what they would charge, and a quotation in response is not an offer the government can accept to form a contract — the government's purchase order is the offer.
- Sealed bidding
Sealed bidding is the FAR Part 14 procedure in which the government issues an invitation for bids, opens all bids publicly at a fixed time, and awards to the lowest responsive, responsible bidder on price alone, with no negotiation.
- Solicitation amendment
An amendment is the government's formal change to a published solicitation — issued on Standard Form 30 — and failing to acknowledge one can make an otherwise winning bid nonresponsive.
Contract types and vehicles
How the work is packaged and priced — from a single fixed-price job to a ten-year ordering vehicle you have to be on before the orders start.
- BPA
Blanket Purchase Agreement
A BPA is, in the FAR's own words, a simplified method of filling anticipated repetitive needs for supplies or services by establishing charge accounts with qualified sources of supply.
- CPFF
Cost-Plus-Fixed-Fee contract
A cost-plus-fixed-fee contract reimburses the contractor's allowable costs and pays a negotiated fee that is fixed at the outset and does not vary with actual cost, though it may be adjusted if the work itself changes.
- Fair opportunity
Fair opportunity is the requirement that every holder of a multiple-award indefinite-delivery contract be given a fair chance to be considered for each order placed under it, above the micro-purchase threshold and subject to stated exceptions.
- Firm-fixed-price
Firm-Fixed-Price contract (FFP)
A firm-fixed-price contract sets a price that is not subject to adjustment on the basis of the contractor's cost experience, which places the full cost risk — and the full benefit of efficiency — on the contractor.
- GWAC
Governmentwide Acquisition Contract
A GWAC is defined by FAR 2.101 as a task-order or delivery-order contract for information technology established by one agency for governmentwide use.
- IDIQ
Indefinite-Delivery, Indefinite-Quantity contract
An IDIQ is a contract that fixes the terms and prices for work whose exact quantity and timing are unknown, obliges the government to order at least a stated minimum, and delivers the actual work through task or delivery orders placed against it.
- Micro-purchase threshold
The micro-purchase threshold is the level below which the government may buy without obtaining competitive quotations, set by FAR 2.101 at $15,000 generally, but at $2,000 for construction subject to the Davis-Bacon wage requirements and $2,500 for services subject to the Service Contract Labor Standards.
- Simplified acquisition threshold
Simplified Acquisition Threshold (SAT)
The simplified acquisition threshold is the dollar level below which agencies may use the streamlined buying procedures in FAR Part 13, and FAR 2.101 currently sets it at $350,000 with higher figures for contingency and humanitarian operations.
- Sole source
A sole-source award is a contract made without full and open competition, permitted only on one of the statutory grounds in FAR 6.302 and normally requiring a written justification and approval, or under the specific sole-source authorities of the small-business programs.
- Task order
A task or delivery order is the instrument that buys actual work under an existing indefinite-delivery contract — services on a task order, supplies on a delivery order — using terms already fixed by the underlying contract.
- Time-and-materials
Time-and-Materials contract (T&M)
A time-and-materials contract buys labour at fixed hourly rates that include overhead and profit, plus materials at cost, and the FAR treats it as the least preferred type because it gives the contractor no incentive to control hours.
Small-business programs
The certifications that reserve contracts for a defined group of firms, and the eligibility tests behind each one.
- 8(a)
8(a) Business Development program
The 8(a) Business Development program is a nine-year SBA program for small businesses at least 51% owned and controlled by U.S. citizens who are socially and economically disadvantaged, and participation makes a firm eligible for 8(a) set-aside and sole-source contracts.
- HUBZone
Historically Underutilized Business Zone program
HUBZone is an SBA program for small businesses whose principal office is located in a Historically Underutilized Business Zone and at least 35% of whose employees live in a HUBZone, and certification makes a firm eligible for HUBZone set-aside and sole-source contracts.
- Joint venture
A joint venture is two or more firms combining to pursue a specific contract, and SBA's rules allow a small business to joint venture with a larger firm without the two being treated as affiliates when the arrangement fits an approved exception.
- Limitations on subcontracting
On a set-aside contract, FAR 52.219-14 caps how much of the amount the government pays may go to subcontractors that are not similarly situated entities: 50% for services and for supplies, 85% for general construction and 75% for construction by special trade contractors.
- Rule of two
The rule of two is the requirement that a contracting officer set an acquisition above the simplified acquisition threshold aside for small business whenever there is a reasonable expectation that offers will be obtained from at least two responsible small business concerns and that award will be made at fair market prices.
- SDVOSB
Service-Disabled Veteran-Owned Small Business
An SDVOSB is a small business at least 51% owned and controlled by one or more veterans rated as service-disabled by the VA, and SBA certification through the VetCert program is now required to compete for SDVOSB set-aside and sole-source contracts.
- Set-aside
A set-aside is a contract reserved for competition among a defined class of small businesses, so that firms outside the class cannot compete for it at all.
- Size standard
A size standard is the maximum size — stated as average annual receipts or as number of employees — at which a business still counts as small for a particular NAICS code, and it is what decides whether you may compete for a small-business set-aside.
- Teaming agreement
A contractor team arrangement is either two or more companies forming a partnership or joint venture to act as a potential prime contractor, or a potential prime agreeing with other companies to have them act as its subcontractors under a specified contract or acquisition program.
- WOSB
Women-Owned Small Business federal contract program
The WOSB federal contract program reserves certain contracts for small businesses at least 51% owned and controlled by women who are U.S. citizens, with an EDWOSB tier for firms whose owners also meet SBA's economic-disadvantage limits.
Codes, numbers and registration
The identifiers a buyer uses to find you and the registration without which you cannot be paid.
- CAGE code
Commercial and Government Entity code
A CAGE code is the five-character identifier the Defense Logistics Agency assigns to a specific facility of an entity doing business with the federal government, and it is issued automatically as part of SAM.gov registration for U.S. entities.
- Capability statement
A capability statement is a one-page summary of what your firm does, what it has done, and how it is classified and certified, written for a contracting officer doing market research rather than for a commercial customer.
- NAICS code
North American Industry Classification System code
A NAICS code is the six-digit classification the U.S. Census Bureau publishes for an industry, and on a federal solicitation the single code the buyer assigns decides which SBA size standard applies and therefore whether your business counts as small for that contract.
- PSC
Product and Service Code
A PSC is the four-character code the federal government uses to classify what is being bought — the product or service itself — as opposed to NAICS, which classifies the industry that supplies it.
- SAM.gov registration
SAM.gov registration is the free federal registration a company must have — and keep active — to be awarded a federal contract, and it must be renewed annually.
- UEI
Unique Entity ID
The Unique Entity ID is the twelve-character alphanumeric identifier the government assigns to an entity in SAM.gov, and it replaced the DUNS number as the federal government's entity identifier in April 2022.
Wages, bonds and the rulebook
The obligations that attach to a federal contract by operation of law, most of which are priced into your bid whether you noticed them or not.
- Bid bond
A bid bond, called a bid guarantee in the FAR, is security pledged with your offer that you will sign the contract and furnish the required performance and payment bonds if you win, and failing to include one when required makes a sealed bid nonresponsive.
- Davis-Bacon Act
Wage Rate Requirements (Construction)
The Davis-Bacon Act, implemented in the FAR as Construction Wage Rate Requirements, requires laborers and mechanics on federal construction contracts in excess of $2,000 to be paid no less than the prevailing wage determined by the Secretary of Labor for the locality.
- DFARS
Defense Federal Acquisition Regulation Supplement
DFARS is the Department of Defense supplement to the FAR — it does not replace the FAR but adds DoD-specific policy and clauses on top of it, and its section numbers mirror the FAR part they supplement.
- FAR
Federal Acquisition Regulation
The Federal Acquisition Regulation is the uniform body of rules governing how executive agencies buy supplies and services, codified at 48 CFR chapter 1 and organised into parts, subparts and sections that solicitations cite constantly.
- Miller Act
The Miller Act requires performance and payment bonds on federal construction contracts exceeding $150,000, and gives unpaid subcontractors and suppliers a right of action on the payment bond because they cannot lien federal property.
- Payment bond
A payment bond is a surety's guarantee that the contractor will pay its subcontractors and suppliers, and on federal work it is the substitute for the mechanic's lien that cannot be placed against government property.
- Performance bond
A performance bond is a surety's guarantee to the government that the contract will be completed according to its terms, furnished after award and required on federal construction contracts above the Miller Act threshold.
- Service Contract Act
Service Contract Labor Standards
The Service Contract Act, implemented in the FAR as Service Contract Labor Standards, requires service contracts over $2,500 to pay service employees no less than the wages and fringe benefits determined by the Department of Labor for the locality.
- Subcontracting plan
A subcontracting plan is the document a large prime must submit committing to subcontract a share of the work to small businesses, required under FAR 19.702 when a contract is expected to exceed $900,000, or $2 million for construction, and subcontracting possibilities exist.
- Wage determination
A wage determination is the Department of Labor's published schedule of minimum wage rates and fringe benefits for each labour classification in a locality, incorporated into a solicitation so that bidders price the same labour floor.
After you bid
Evaluation, award, the record that follows you to the next bid, and what to do when you think the buyer got it wrong.
- Bid protest
A bid protest is a formal challenge to a solicitation, a cancellation, or an award, and it can be filed with the contracting agency itself, with the Government Accountability Office, or with the U.S. Court of Federal Claims.
- Contracting officer
A contracting officer is the only person with authority to enter into, administer or terminate a federal contract on behalf of the government, and that authority is limited by a written warrant that states its dollar limits.
- CPARS
Contractor Performance Assessment Reporting System
CPARS is the federal system in which agencies record contractor performance evaluations, which are then available to source-selection officials on future competitions — making your CPARS record a direct input to whether you win again.
- Debriefing
A debriefing is the agency's explanation of how your proposal was evaluated and why it did not win, available on request in negotiated procurements, and the timing of a required debriefing also controls the deadline for a protest that stops performance.
- GAO protest
A GAO protest is a bid protest filed with the Government Accountability Office, which must decide it within 100 calendar days, and which has strict filing deadlines — solicitation challenges before proposals are due, other grounds within 10 days of when you knew or should have known of them.
- Novation
A novation is the government's formal recognition of a new contractor in place of the original one — necessary because a federal contract cannot simply be assigned when a business is sold, merged or restructured.
- Past performance
Past performance is the record of how well you performed previous contracts, used as an evaluation factor in most negotiated procurements, and a firm with no relevant record must be evaluated neither favourably nor unfavourably on it.
Every term, A–Z
All 50 entries in one list. Each links to a page with the definition, the authority it comes from, any published thresholds that attach to it, and the free tools that act on it.
- 8(a) — 8(a) Business Development program
- Bid bond
- Bid protest
- BPA — Blanket Purchase Agreement
- CAGE code — Commercial and Government Entity code
- Capability statement
- Contracting officer
- CPARS — Contractor Performance Assessment Reporting System
- CPFF — Cost-Plus-Fixed-Fee contract
- Davis-Bacon Act — Wage Rate Requirements (Construction)
- Debriefing
- DFARS — Defense Federal Acquisition Regulation Supplement
- Fair opportunity
- FAR — Federal Acquisition Regulation
- Firm-fixed-price — Firm-Fixed-Price contract (FFP)
- GAO protest
- GWAC — Governmentwide Acquisition Contract
- HUBZone — Historically Underutilized Business Zone program
- IDIQ — Indefinite-Delivery, Indefinite-Quantity contract
- Joint venture
- Limitations on subcontracting
- Micro-purchase threshold
- Miller Act
- NAICS code — North American Industry Classification System code
- Novation
- Past performance
- Payment bond
- Performance bond
- PSC — Product and Service Code
- Responsive bid
- RFI — Request for Information
- RFP — Request for Proposal
- RFQ — Request for Quotation
- Rule of two
- SAM.gov registration
- SDVOSB — Service-Disabled Veteran-Owned Small Business
- Sealed bidding
- Service Contract Act — Service Contract Labor Standards
- Set-aside
- Simplified acquisition threshold — Simplified Acquisition Threshold (SAT)
- Size standard
- Sole source
- Solicitation amendment
- Subcontracting plan
- Task order
- Teaming agreement
- Time-and-materials — Time-and-Materials contract (T&M)
- UEI — Unique Entity ID
- Wage determination
- WOSB — Women-Owned Small Business federal contract program
This vs that
The pairs contractors most often mix up, and the distinction in one line. Each links to the fuller explanation.
- 8(a) vs HUBZone
8(a) tests the owner's social and economic disadvantage and lasts nine years; HUBZone tests where the business and its employees are located and lasts as long as the firm stays qualified.
- 8(a) vs WOSB
EDWOSB uses the same three economic-disadvantage figures as 8(a) — $850,000 net worth, $400,000 AGI, $6.5 million total assets — but tests ownership by women rather than by socially and economically disadvantaged individuals.
- Bid bond vs Performance bond
A bid bond guarantees you will enter the contract if selected; a performance bond, furnished after award, guarantees you will complete the work.
- Bid bond vs Payment bond
A bid bond protects the government against a bidder walking away; a payment bond protects your subcontractors and suppliers against not being paid.
- Bid protest vs GAO protest
A bid protest can be filed at three forums; a GAO protest is the specific route to the Government Accountability Office, with its own timeliness rules and a 100-day decision deadline.
- BPA vs IDIQ
An IDIQ guarantees a minimum order and is a contract in itself; a simplified-acquisition BPA is a pre-arranged charge account for repetitive buys.
- BPA vs RFQ
A BPA is often established after a period of repeated RFQ buying from the same vendor, and removes the need to re-quote each time.
- CAGE code vs UEI
CAGE identifies a facility and comes from DLA; the UEI identifies the entity and comes from SAM.gov.
- CPFF vs Firm-fixed-price
FFP pays a price regardless of cost; CPFF pays allowable costs plus a fee fixed independently of them.
- Davis-Bacon Act vs Service Contract Act
Davis-Bacon covers construction, alteration and repair above $2,000; the Service Contract Act covers service contracts above $2,500. Which one applies is decided by the nature of the work.
- DFARS vs FAR
The FAR is the governmentwide baseline; DFARS adds DoD-specific requirements to it and never stands alone.
- Firm-fixed-price vs Time-and-materials
T&M pays fixed hourly rates for hours actually worked, so the government carries quantity risk; FFP fixes the total for the delivered result.
- GAO protest vs Debriefing
The required-debriefing date is what can extend the suspension window past the 10-days-after-award date — which is why the debriefing should always be requested.
- GWAC vs IDIQ
A GWAC is an indefinite-delivery vehicle for IT open to the whole government; an ordinary IDIQ serves the awarding agency.
- Joint venture vs Teaming agreement
A joint venture bids as a single entity formed by the partners; a prime-subcontractor teaming agreement has one firm bid as prime and the other perform as its subcontractor.
- Limitations on subcontracting vs Subcontracting plan
Limitations on subcontracting cap how much of a set-aside a prime may push out; a subcontracting plan is the opposite obligation, requiring a large prime to plan how much it will push out to small businesses.
- Micro-purchase threshold vs Simplified acquisition threshold
Below the micro-purchase threshold no competitive quotes are needed at all; between it and the SAT the buy uses simplified procedures and is reserved for small business.
- Miller Act vs Payment bond
The Miller Act is the statute; the payment bond is one of the two instruments it requires.
- NAICS code vs PSC
NAICS classifies the industry that performs the work; a PSC classifies the product or service being bought. Federal solicitations commonly carry both.
- NAICS code vs Size standard
The NAICS code is the classification; the size standard is the dollar or headcount threshold SBA attaches to it.
- Past performance vs CPARS
Past performance is the evaluation factor; CPARS is the government system in which the performance record that feeds it is written.
- Payment bond vs Performance bond
The payment bond runs to the benefit of subcontractors and suppliers; the performance bond runs to the benefit of the government.
- Responsive bid vs Sealed bidding
Responsiveness is a sealed-bidding concept; in a negotiated procurement the equivalent failure is being excluded from the competitive range or rejected as noncompliant with Section L.
- RFI vs RFP
An RFI gathers information and awards nothing; an RFP solicits proposals the government intends to award from.
- RFI vs Rule of two
RFI and sources-sought responses are the evidence a contracting officer uses to decide whether two or more capable small businesses exist — which is the rule-of-two test.
- RFP vs RFQ
An RFQ asks for a quote, which is information rather than an offer; an RFP asks for a proposal, which is an offer the government can accept and thereby form a contract.
- RFP vs Sealed bidding
Sealed bidding awards to the lowest responsive, responsible bidder on price; an RFP lets the buyer trade price against technical merit and past performance.
- RFQ vs Simplified acquisition threshold
RFQs live mostly below the simplified acquisition threshold, which is the ceiling on the streamlined procedures that make them quick.
- SDVOSB vs 8(a)
SDVOSB has no program term and no income test; 8(a) runs nine years and tests the owner's personal finances.
- Set-aside vs Sole source
A set-aside narrows the competition to a class of firms; a sole-source award under a program authority removes the competition entirely for one firm.
Common questions
- What is the FAR, and why does every definition cite it?
- The Federal Acquisition Regulation is the uniform rulebook executive agencies buy under, codified at 48 CFR chapter 1. Almost every term in federal contracting is defined somewhere in it — or in Title 13 of the CFR, where SBA's small-business rules live, or in a statute like the Miller Act. We cite the source on every entry because contracting is one of the few fields where the authoritative answer is free, public and one click away, and because a definition with no citation cannot be checked.
- Are the dollar thresholds on these pages current?
- Every figure was read from its cited primary source on 2026-08-04, and each one is published beside its authority and that date. Acquisition thresholds do move — they are adjusted for inflation on a cycle and by statute in between, and several figures widely repeated on contractor-education sites are years out of date. Where we could not verify a figure we describe the concept without the number rather than guess. Check the cited regulation before you rely on any threshold in a bid.
- Which terms matter most if I have never bid a federal contract?
- Five, in this order: SAM.gov registration, because without an active one you cannot be awarded anything; NAICS code, because the code on the solicitation sets the size standard you are judged against; size standard, because it decides whether you count as small; set-aside, because it tells you whether the contract is open to you at all; and wage determination, because on construction and services work it sets the labour cost your bid has to be built from.
- Is a quote the same as a bid?
- No, and the FAR is explicit about it. A quotation submitted in response to a request for quotation is not an offer and cannot be accepted by the government to form a contract — the government's resulting purchase order is the offer, which you accept by performing. A proposal submitted in response to a request for proposals, and a bid submitted in sealed bidding, are offers the government can accept outright.
- Do I need a lawyer to read a solicitation?
- Not for most small contracts. The parts that decide whether you win are readable: the set-aside line, the NAICS code, the deadline, the submission instructions, the evaluation factors, and any wage determination or bonding requirement. What is worth professional help is a teaming agreement, a joint venture agreement, or a protest — those are legal instruments with consequences that outlast the bid. Nothing on this site is legal advice.
Knowing the words is step one
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