Colors of Money in DoD: Appropriations, Tests, and Penalties

In Department of Defense budgeting, the “colors of money” are the five categories of congressionally appropriated funds the Pentagon uses to pay its bills, each with its own allowed purpose, its own expiration clock, and its own dollar rules. Mixing them up isn’t a bookkeeping quirk; it can be an Antideficiency Act violation with real personal and criminal consequences. The five colors are Research, Development, Test and Evaluation (RDT&E); Procurement; Operation and Maintenance (O&M); Military Personnel (MILPERS); and Military Construction (MILCON).¹

The Five Colors and What Each One Buys

Congress doesn’t hand DoD a single pot of cash. It provides budget authority in categories defined by DoD 7000.14-R, the Financial Management Regulation.¹

RDT&E funds the research and development of equipment, materiel, and software, plus testing and evaluation and the operation of dedicated R&D installations. It’s organized into budget activities from basic research (BA-1) through operational system development (BA-7), with a newer BA-8 for software and digital technology pilot programs.²
Procurement pays for acquisition programs approved for production, including low-rate initial production, and all costs integral to delivering a usable end item.¹
O&M covers day-to-day operating expenses: civilian salaries, travel, minor construction, operating forces, training, education, depot maintenance, stock funds, and base operations support.¹
MILPERS pays salaries, compensation, and allowances for active-duty and retired military personnel and reserve forces.³
MILCON funds major capital projects at installations: bases, schools, missile storage, maintenance buildings, medical clinics, and military family housing, plus land acquisition and defense access roads.⁴

The lifecycle logic behind the categories is deliberate. A capability starts in RDT&E while it’s being invented and tested, moves to Procurement once it’s ready to be built at scale, and then draws on O&M to be operated and maintained in the field. MILPERS pays the people, and MILCON builds the facilities they work in.

How Long Each Color Lasts

Every color comes with a period during which its funds can be legally obligated. Once that window closes, unobligated funds expire and generally can’t back new commitments.⁵

O&M: one fiscal year.⁵
MILPERS: one fiscal year.³
RDT&E: two years. Air Force RDT&E is commonly called “3600 funding” and can be obligated in the current and following fiscal year.⁶
Procurement: three years, with Navy Shipbuilding and Conversion funds available for five.⁷
MILCON: five fiscal years.⁴

These windows aren’t guidance. The bona fide needs rule at 31 U.S.C. § 1502(a) requires a fixed-period appropriation to be obligated only for legitimate needs arising during its period of availability, so current-year funds can’t be used for next year’s needs absent specific statutory authority. For a severable service contract paid with one-year O&M money, that means the work generally can’t extend beyond the fiscal year of obligation. A nonseverable contract, meaning a single discrete deliverable like a study, is charged to the year the contract was awarded regardless of when performance ends.⁸

Purpose, Time, and Amount: The Three Tests Every Dollar Must Pass

Federal fiscal law reduces to three constraints, and the color-of-money framework exists to enforce all three.

Purpose

Under 31 U.S.C. § 1301(a), appropriations “shall be applied only to the objects for which the appropriations were made.”⁹ Because Congress can’t list every possible expense, the GAO’s “necessary expense” doctrine supplies a three-step test: the expense must bear a logical relationship to the appropriation, must not be prohibited by law, and must not fall within the scope of another, more specific appropriation.¹⁰ That third step is where color-of-money disputes usually land. If the activity looks like research, it belongs in RDT&E. If it looks like a production buy, it belongs in Procurement. Picking the wrong color violates the purpose statute even when the money was otherwise available.

Time

Funds must be obligated within their statutory period of availability. An annual appropriation like O&M runs from October 1 through September 30.⁵

Amount

An agency can’t obligate more than Congress appropriated. This is the constraint most people associate with the Antideficiency Act, though the Act covers purpose and time violations too.¹¹

The Expense-Investment Threshold: When Does O&M Cross Into Procurement?

The most common color-of-money question in day-to-day contracting is whether a purchase is an expense (O&M) or an investment (Procurement). The line is a unit-cost dollar threshold set each year by Congress. As of fiscal year 2023, O&M funds can buy investment items with a unit cost up to $350,000, raised from the prior $250,000 limit. Above that, the item must be funded with Procurement dollars. In named contingency operations overseas, the threshold rises to $500,000, subject to annual authorization from the Under Secretary of Defense (Comptroller).¹² Equipment subject to centralized item management and asset control is funded with Procurement regardless of unit cost.¹³

What Happens When Someone Uses the Wrong Color

The Antideficiency Act is the enforcement mechanism. It prohibits federal employees from obligating or spending funds in excess of an appropriation, committing the government to pay before funds have been appropriated, or accepting voluntary services not authorized by law.¹¹ Violations also arise from spending the wrong color (a purpose violation) or obligating funds after their availability period expires (a time violation).¹⁴

Penalties run from administrative discipline (suspension without pay, removal from office) to criminal sanctions. A knowing and willful violation is a felony punishable by a fine of up to $5,000, imprisonment for up to two years, or both.⁶ When a violation is confirmed, the agency head must report the facts and corrective actions to the President and Congress and send a copy to the Comptroller General.¹¹

The cases are not hypothetical. In fiscal year 2024, the Defense Intelligence Agency was found to have violated the ADA by using O&M funds for an artificial intelligence research project that should have been funded with RDT&E. A budget analyst had advised staff to rewrite the statement of work to make it look like an O&M service contract. The violation totaled roughly $1.4 million, and no discipline was imposed because the employees involved had left government service. In the same reporting cycle, the Department of the Navy disclosed that it had spent over $5.6 million in MILPERS, O&M, and Reserve Personnel funds on personal expenses (food, travel, uniforms) for Marine Corps National Defense Cadet Corps students that were not authorized under the program’s enabling statute. The responsible officials received oral admonishments.¹⁵

Larger figures show up regularly. The FY 2025 compilation included a $102 million Army National Guard violation caused by a system malfunction that over-obligated bonus and retention incentive funds.¹⁶ A 2007 DoD Inspector General report found 69 potential ADA violations worth $130.6 million in a single fiscal year, largely tied to bona fide needs failures on orders routed through non-DoD agencies like GSA and the Department of the Interior.¹⁷

What Colors of Money Mean for Contractors

For defense contractors, the color of money on a contract dictates both how it’s structured and what risks arise during performance. The funding type has to match the purpose: RDT&E for research work, O&M for training or services, Procurement for production buys. The government bears the primary legal duty to pick the right color, but that choice shapes the Statement of Work and the contract’s line-item structure.⁶

Under the DFARS, each contract line item must reference a single Accounting Classification Reference Number (ACRN) tying it to a specific appropriation. When multiple funding sources apply to a single deliverable, such as a satellite program funded by both RDT&E and Procurement, informational subline items are established for each funding citation to maintain traceability.¹⁸ Contractors are also typically required to notify the government in advance, often 60 days before reaching 75 percent of available funding, if they’re approaching the exhaustion of obligated funds. Working past that point on your own dime does not guarantee reimbursement.⁶

Where the Rules Are Loosening: Software and the FY 2026 Proposals

Traditional color-of-money boundaries fit poorly with software programs that don’t move through a clean develop-then-produce lifecycle. Beginning in fiscal year 2021, DoD introduced Budget Activity 8, the “Software and Digital Technology Pilot Programs” category within RDT&E. BA-8 lets designated programs develop, acquire, and maintain software using a single appropriation rather than splitting the work across RDT&E, Procurement, and O&M. GAO found the pilot only “partially met” leading practices for pilot design and that DoD had not finalized an evaluation plan for whether the flexibility was working.¹⁹

In March 2024, the Commission on Planning, Programming, Budgeting, and Execution Reform released its final report with 28 recommendations, including one titled “Address Challenges with Colors of Money.” The commission proposed a long-term restructuring of defense appropriations around “major capability activity areas” rather than the current lifecycle categories, targeting fiscal year 2028 for adoption.²⁰

The DoD’s fiscal year 2026 budget request took smaller steps in that direction. It proposed extending O&M and MILPERS PCS funds from one-year to two-year availability, letting five percent of annual O&M carry over for unanticipated expenses. It sought higher below-threshold reprogramming limits ($30 million for O&M, $25 million for RDT&E, $40 million for Procurement) and proposed allowing Procurement, RDT&E, and O&M to be used across the entire lifecycle of software and digital technology programs department-wide.²¹ In the final FY 2026 defense appropriations bill, congressional appropriators rejected several of these modernizations, refused to update reprogramming thresholds, and warned the Pentagon against seeking greater flexibility until it demonstrates progress on internal financial reform and passes its financial audits.²²

Where to Look Up the Authoritative Rules

For any specific question about whether a color of money is legally available for a given expense, the controlling reference is the GAO’s multi-volume treatise Principles of Federal Appropriations Law, known as the Red Book. Its chapters on purpose (Chapter 3, 4th Edition), time (Chapter 5, 3rd Edition), and amount (Chapter 6, 3rd Edition) supply the doctrinal framework.²³ The DoD Financial Management Regulation (DoD 7000.14-R) translates those principles into department-specific policy, including the definitions of each appropriation category, the expense-investment threshold, and reprogramming procedures.¹

1
Defense Acquisition University. Appropriated Funds Support Contracts
2
Office of the Under Secretary of Defense (Comptroller). DoD Financial Management Regulation, Volume 2B, Chapter 5
3
West Point (WARU). Military Personnel Appropriation
4
Office of the Under Secretary of Defense (Comptroller). DoD Financial Management Regulation, Volume 3, Chapter 17
5
DoD Office of General Counsel. Fiscal Law Overview
6
MITRE AIDA. Understanding DoD Contracting
7
Congressional Research Service. Defense Primer: Procurement
8
Government Accountability Office. Decision B-322455
9
Cornell Law Institute. 31 U.S.C. § 1301
10
Government Accountability Office. Principles of Federal Appropriations Law, Chapter 3
11
Government Accountability Office. Appropriations Law Resources
12
Office of the Under Secretary of Defense (Comptroller). FPM 23-02 Memorandum
13
Defense Acquisition University. Procurement Funds
14
Office of the Under Secretary of Defense (Comptroller). DoD Financial Management Regulation, Volume 14, Chapter 2
15
Government Accountability Office. Fiscal Year 2024 Antideficiency Act Reports Compilation
16
Government Accountability Office. Fiscal Year 2025 Antideficiency Act Reports Compilation
17
Department of Defense Inspector General. Report No. D-2007-042
18
Defense Procurement and Acquisition Policy. DFARS Subpart 204.71
19
Government Accountability Office. GAO-23-105822
20
Congressional Research Service. PPBE Reform Commission Recommendations
21
Office of the Under Secretary of Defense (Comptroller). FY2026 PPBE Reform Activities
22
American Enterprise Institute. Final 2026 Defense Appropriations, Finally
23
Government Accountability Office. Principles of Federal Appropriations Law (Red Book)