If you have ever wondered how a small technology startup with no federal contracting experience wins a project with the Department of Defense, the answer is often a mechanism most traditional contractors have never used: other transaction authority. An Other Transaction Agreement — usually called an OTA — lets certain agencies buy research and prototypes outside the Federal Acquisition Regulation. OTAs move faster than FAR contracts, attract companies that would never bid on a traditional procurement, and have become one of the government’s main tools for buying innovation.
This guide explains what other transaction authority is, the three types of OTAs, which agencies hold the authority, how prototype OTAs work in practice, what consortia are, and how a small or nontraditional firm can get involved. It also covers how OTAs differ from FAR contracts, and the risks to understand before you participate.
What Is Other Transaction Authority?
Other Transaction Authority is a legal authority granted by Congress that allows certain federal agencies to enter into agreements that are not procurement contracts, grants, or cooperative agreements. The key point is what an OTA is not: it is not a FAR contract. The Federal Acquisition Regulation does not apply to OTAs, which means the government and the performer can negotiate the terms freely — the structure of the agreement, the payment schedule, the intellectual property terms, and the reporting requirements are all matters of negotiation rather than regulation.
OTA was created to solve a specific problem. The traditional federal procurement system is slow, complex, and expensive to navigate. That works tolerably for buying established products and services, but it discourages the companies the government most wants to reach: commercial technology firms, startups, and nontraditional defense contractors that have never done business with the government and do not want to build a compliance department just to sell a prototype. OTA removes many of those barriers. A company can participate without a full government accounting system, without cost accounting standards, and without the standard FAR clauses that make traditional contracts so burdensome.
The Three Types of OTAs
OTAs fall into three categories, and the differences matter because they determine what the agreement can do and how it can end.
Research OTAs fund research and development work. The government uses them to explore new technologies and fund early-stage research that is too uncertain or too novel for a traditional contract. They are often the entry point for universities, research labs, and small technology firms.
Prototype OTAs are the best known and most widely used type. They fund the development of prototypes — working models of a technology, system, or capability that the government can test and evaluate. Prototype OTAs are governed by a specific statute, 10 U.S.C. 4022, and they carry specific requirements, including the nontraditional contractor rule discussed below. Most of the OTA activity you will hear about is prototype work.
Production OTAs are not a separate agreement so much as a follow-on option. When a prototype OTA is successful, the government may award a follow-on production contract — or a follow-on production OTA — for the item or system, without a new competition. The follow-on is not guaranteed; it depends on the prototype meeting the agreed success criteria. But the possibility of a sole-source production award is a powerful incentive for firms to invest in prototype work.
Which Agencies Hold OTA Authority?
The Department of Defense holds the broadest and most active OTA authority, and it is where most OTA dollars flow. Within DoD, the military services, the Defense Advanced Research Projects Agency (DARPA), and other defense agencies use OTAs extensively. The Defense Innovation Unit (DIU) is one of the most visible users: it runs challenges and solicitations specifically aimed at commercial technology companies, and it uses prototype OTAs to move promising technologies into testing quickly.
Other agencies with OTA authority include the Department of Homeland Security, which uses OTAs for border and security technology; the Department of Energy, for energy research and development; NASA, for space technology; and the Department of Health and Human Services, for health-related research and response capabilities. The list grows as Congress extends the authority, so it is worth checking whether the agency you want to work with holds it. Note that OTA authority is agency-specific: an agency that holds it can use it only within the scope of its own statute. The offices that run OTA programs tend to be innovation-focused — DIU, DARPA, the Army’s innovation units, and similar organisations — and they publish their needs openly through challenges, solicitations, and consortium announcements.
How Prototype OTAs Work
A prototype OTA typically starts with the agency identifying a problem or a capability gap. Rather than writing a detailed specification and running a traditional procurement, the agency issues a broad solicitation — often through a consortium or through SAM.gov — describing the problem and inviting solutions. Companies respond with short proposals, often called white papers, describing their technology and how it addresses the problem.
The agency evaluates the responses, selects one or more promising solutions, and enters into a prototype OTA with the selected firms. The agreement sets out the prototype to be built, the milestones, the payment schedule, and the success criteria. Payments are often tied to milestones rather than to costs incurred, which is a significant departure from traditional cost-reimbursement contracting. Prototype OTAs are usually awarded faster than FAR contracts: the solicitation-to-award cycle can be measured in weeks or a few months rather than the year or more that a major FAR procurement can take. The process is also more interactive, with the agency and the performer working closely during performance and adjusting the prototype as testing reveals what works.
There is one important statutory requirement for prototype OTAs. The law requires that at least one nontraditional defense contractor participate in the prototype project to a significant extent, or that the agreement include at least one-third cost sharing by the non-federal parties, or that the government make a written determination that exceptional circumstances justify the OTA. A “nontraditional defense contractor” is a company that has not performed a contract or subcontract for DoD under the FAR for at least a year before the OTA solicitation. This rule is deliberate: it exists to make sure OTAs actually reach the new companies they were created for, rather than simply becoming a faster route for the same traditional contractors. For a small firm or a commercial technology company with no recent DoD work, that rule works in your favour.
Consortia: The Front Door to Most OTAs
Most prototype OTAs are awarded through consortia, and understanding consortia is essential to participating. A consortium is a group of companies, universities, and research organisations that have joined together under a single consortium management organisation. The government awards an OTA to the consortium manager, and the manager then issues project awards to individual members.
Joining a consortium is the practical front door to OTA work. There are dozens of them, organised around different mission areas — space, cyber, medical technology, energy, ground vehicles, and many more. Membership typically involves an application and an annual fee, which varies by consortium. For a small firm, consortium membership is a modest investment that opens access to solicitations you would otherwise never see. The consortium manager handles the administrative burden — the OTA agreement itself, the payment flow, the reporting — so the member company can focus on the technical work. That said, membership alone wins nothing: you still have to respond to solicitations, compete against other members, and deliver a prototype that meets the government’s needs. Choose the consortia that match your technology and your market, join one or two rather than a dozen, and participate actively in the ones you join.
How Small and Nontraditional Firms Participate
OTAs were designed for firms like yours. If you are a small technology company, a startup, or a commercial firm with no federal contracting history, the OTA route may be easier than the traditional route. You do not need a GSA Schedule, you do not need to be registered for a specific contract vehicle, and you do not need the compliance infrastructure that a FAR contract demands.
The practical steps are straightforward. First, make sure your SAM.gov registration is current, because you will still need it to receive federal funds. Second, identify the consortia in your mission area and join the one or two that fit best. Third, watch for solicitations and challenges from the agencies and offices that buy your kind of technology — DIU, DARPA, the service innovation units, and the consortia themselves all publish opportunities regularly. Fourth, respond with a clear, short white paper that explains your technology, what it does, and why it solves the government’s problem. Keep it focused on the capability, not on your company history.
It also helps to understand the landscape of government-wide vehicles alongside OTAs. Many firms that start with an OTA later pursue a place on a vehicle such as OASIS+ for professional services work, or a GWAC for IT work, to convert prototype success into sustained revenue. Our guides on OASIS+ explained and how to get on a GWAC explain those routes. And if you are weighing a schedule contract as a longer-term platform, our comparison of GSA schedule vs open market buying is a useful starting point.
OTAs vs FAR Contracts: The Key Differences
The differences between an OTA and a FAR contract are the reason OTAs exist, and they are worth understanding clearly.
Regulation. A FAR contract is governed by the Federal Acquisition Regulation, the Defense FAR Supplement, and a thicket of clauses. An OTA is governed by the agreement the parties negotiate. That makes OTAs faster to award and more flexible to administer, but it also means there are fewer standard protections when something goes wrong.
Competition. FAR contracts generally require full and open competition with detailed, formal procedures. OTAs require competition too — the government must compete prototype OTAs to the maximum extent practicable — but the procedures are far less formal. Solicitations can be short, evaluation can be fast, and the agency has much more discretion in how it runs the competition.
Intellectual property. Under a FAR contract, the government typically receives broad rights in technical data and software developed with government funding. Under an OTA, the intellectual property terms are negotiated. A company can often retain much stronger rights to its technology, which is a major reason commercial firms prefer OTAs — though the government will still negotiate for the rights it needs to use and maintain the prototype.
Accounting and compliance. A FAR contract, especially a cost-reimbursement one, requires an approved accounting system, cost accounting standards compliance for larger contracts, and a host of reporting obligations. An OTA does not impose those requirements. Payment is typically milestone-based, and the reporting is whatever the agreement specifies. For a small firm without a government accounting system, this is often the deciding difference.
Protests. FAR contract awards can be protested at the Government Accountability Office, and bid protests are a routine part of federal procurement. OTA awards generally cannot be protested at GAO in the same way, because an OTA is not a procurement contract. That means faster awards, but also less recourse if you believe an award was made unfairly.
Pros, Cons, and Risks
The advantages of OTAs are real: speed, flexibility, lighter compliance, stronger intellectual property terms, and access for companies that have never done federal work. The follow-on production option is a genuine path from prototype to revenue without a new competition. For a technology firm, an OTA can be the fastest route to a government customer.
The risks deserve equal attention. First, an OTA is not a FAR contract, so many of the protections contractors rely on — the disputes process, the standard clauses, the protest rights — do not apply. If a dispute arises, you are relying on the terms of the agreement and the relationship with the government team. Second, the flexibility cuts both ways: because terms are negotiated, a firm that negotiates poorly can end up with unfavourable payment terms or intellectual property provisions. Get legal advice before you sign, especially on intellectual property and on the follow-on production language.
Third, OTA funding is tied to the agency’s research and prototype budgets, which can change with appropriations. Fourth, prototype success does not guarantee a production award: the follow-on is available only if the prototype meets its success criteria and the government decides to proceed. Many prototypes are tested, evaluated, and not taken further, for reasons that may have nothing to do with the quality of the work. Treat an OTA as a funded opportunity to prove your technology, not as a promise of a production contract.
The Bottom Line
Other transaction authority gives certain agencies a way to buy research and prototypes outside the FAR — faster, more flexible, and open to the commercial and nontraditional companies the government most wants to reach. Prototype OTAs, usually awarded through consortia, are the main route in, and the nontraditional contractor rule means the system is built to include firms like yours. The follow-on production option can turn a successful prototype into real revenue. But an OTA is not a FAR contract: the protections are thinner, the terms are negotiated, and success is never guaranteed. Join the right consortium, watch for solicitations in your mission area, respond with a clear white paper, and get advice on the agreement before you sign. Used well, an OTA is one of the best doors into federal work a small technology firm will find.
Related Guides
OTAs: Start Small, Then Scale
OTAs are the fastest way for a nontraditional firm to get its first federal work, so treat your first prototype agreement as a proof of concept, not a payday. Keep your SAM.gov registration current, join a consortium in your technology area, and answer every solicitation with a prototype you can actually build.
Once you have one OTA win, use it as the foundation for the next step: compare it with a GWAC or a GSA schedule contract to decide which vehicle fits your longer-term growth. The firms that turn OTAs into real revenue are the ones that treat the prototype as the start of a relationship, not the end of one.