NASA Budget 2026: Where the $24.4 Billion Goes

Correction (September 26, 2026): an earlier version of this article described NASA's FY2026 budget request as about $25.4 billion. That was wrong. The White House request, submitted in May 2025, proposed a cut of about 24% (to roughly $18.8 billion). Congress rejected nearly all of it: the final FY2026 appropriation, passed in January 2026, gives NASA about $24.4 billion, against $24.9 billion enacted for FY2025. The FY2027 request, released in April 2026, again proposes a cut of about 23%, including about 47% from the Science Mission Directorate. The account and program figures below were rebuilt on September 26, 2026 from the enacted appropriations act (Public Law 119-74, signed January 23, 2026); an earlier version of this article carried approximate figures that did not match it.

NASA's Fiscal Year 2026 budget reflects an agency at a critical inflection point. The Artemis program demands increasing funding as it approaches crewed lunar surface missions. The Science directorate is navigating the tension between flagship missions and a constrained budget envelope. And the agency's growing reliance on commercial partnerships (from crew transportation to lunar landers to space stations) is reshaping how taxpayer dollars flow through the space economy.

This analysis breaks down the FY2026 budget by directorate, examines the key line items, and assesses what it all means for the private sector companies building the future of space.

The Top-Line Numbers

NASA's FY2026 enacted appropriation of $24.44 billion is slightly below the FY2025 enacted level of approximately $24.9 billion, after Congress set aside the proposed 24% cut. Adjusted for inflation it is a small real decline, continuing a decade-long trend of NASA's funding growing more slowly than the space economy it catalyzes. For context, it is roughly 0.35% of federal spending. Separately, the July 2025 budget reconciliation law (H.R. 1) gave NASA about $3.1 billion more for FY2026, most of it for Exploration (SLS, Gateway and a Mars telecommunications orbiter) and $250 million for the ISS.

The enacted appropriation breaks down across NASA's accounts as follows:

Account	FY2026 enacted	% of Total
Exploration (Artemis)	$7,783.0M	31.8%
Science	$7,250.0M	29.7%
Space Operations	$4,175.0M	17.1%
Safety, Security & Mission Services	$3,000.0M	12.3%
Aeronautics	$935.0M	3.8%
Space Technology	$920.5M	3.8%
Construction & Environmental Compliance & Restoration	$185.3M	0.8%
STEM Engagement	$143.0M	0.6%
Office of Inspector General	$46.5M	0.2%
Total	$24,438.3M	100%

Source: Commerce, Justice, Science; Energy and Water Development; and Interior and Environment Appropriations Act, 2026 (Public Law 119-74), Division A, Title III. Program figures below are from the same act and its explanatory statement, as tabulated by The Planetary Society. Reconciliation (H.R. 1) money is shown separately and is not in this table.

Artemis: The Largest Single Program

The Exploration account, run by the Exploration Systems Development Mission Directorate (ESDMD), receives $7.78 billion, about 32% of NASA's enacted appropriation (plus about $2.8 billion from the reconciliation law), making Artemis the agency's most expensive program by a wide margin. This funds the core elements of the lunar return architecture:

• Space Launch System (SLS): $1.31 billion in the appropriation, plus $1.03 billion from the reconciliation law, for the heavy-lift rocket, including continued operations of the Michoud Assembly Facility. (Update, September 2026: NASA has since dropped the planned SLS upgrade built around the Exploration Upper Stage and Mobile Launcher 2, per its March 3, 2026 architecture update.) SLS remains one of the most expensive line items in NASA's budget, and its per-launch cost (NASA's Inspector General estimated in 2021 about $2.2 billion per flight for the rocket's production and operations alone, not counting development) continues to draw scrutiny as commercial alternatives mature.
• Orion spacecraft: $1.42 billion for the crew capsule built by Lockheed Martin. This includes the European Service Module provided by ESA and mission-specific hardware for Artemis III and beyond.
• Human Landing System (HLS): $2.01 billion, split between SpaceX (Starship HLS, originally for Artemis III/IV) and Blue Origin (Blue Moon, originally for Artemis V). Since the February 2026 restructuring, NASA says lander readiness will decide which provider flies the first landing, on Artemis IV. The HLS contracts are among the most consequential commercial partnerships in NASA history: they effectively outsource the most iconic element of lunar exploration (the lander) to private companies for the first time.
• Gateway: $50 million in the appropriation, plus $1.1 billion from the reconciliation law, for the lunar orbital station. Northrop Grumman's HALO (Habitation and Logistics Outpost) module and Maxar's Power and Propulsion Element were in advanced manufacturing. (Update, September 2026: NASA paused Gateway on March 24, 2026 and plans to repurpose applicable hardware; the FY2027 request proposes redirecting its $2.6 billion toward a lunar surface base.)
• Spacesuits and surface mobility: $856 million for the xEVA and Human Surface Mobility program, covering spacesuits (developed by Axiom Space) and lunar rovers. The xEMU-derived Axiom Extravehicular Mobility Unit (AxEMU) spacesuit contract is another example of NASA's commercial partnership model.

Artemis Timeline Pressure

The budget reflects the reality that Artemis is entering its most expensive phase. Artemis II (the crewed lunar flyby) flew in April 2026. Artemis III (restructured in February 2026 into a crewed Earth-orbit Starship HLS docking demonstration) has ceded the first crewed landing since Apollo 17 to Artemis IV, whose schedule still depends on Starship HLS readiness. Each mission requires concurrent development of hardware for future missions, creating overlapping cost peaks. The fundamental tension in Artemis is between schedule ambition and budget reality: every delay adds cost, but budget constraints make schedule compression difficult.

Science: Flagships Under Pressure

The Science Mission Directorate (SMD) receives $7.25 billion, about 1% less than in FY2025 (the request had proposed a 47% cut), making it the second-largest account. This funds planetary science, astrophysics, heliophysics, Earth science, and biological/physical sciences across hundreds of missions and research grants.

Key line items include:

• Mars Sample Return (MSR): Congress's explanatory statement says it does not support the existing MSR program, which an independent review had warned could cost up to $11 billion. Instead it provides $110 million for a Mars Future Missions line that keeps MSR-derived technologies (radar, spectroscopy, entry, descent and landing) alive. Planetary Science as a whole receives $2.54 billion.
• Europa Clipper: Now in its cruise phase following a successful October 2024 launch, the mission requires ongoing operations funding through its arrival at Jupiter in 2030. The mission's transistor radiation concern was resolved, and the spacecraft is performing nominally.
• Dragonfly: The Titan rotorcraft mission receives $500 million for continued development. It remains one of the most technically ambitious planetary missions NASA has ever undertaken.
• Earth Science: $2.15 billion for climate monitoring, weather observation, and Earth system science. This includes contributions to NOAA's Joint Polar Satellite System and the Earth System Observatory.
• Astrophysics: $1.6 billion, including $208 million for the James Webb Space Telescope, $98 million for Hubble, $300 million for the Nancy Grace Roman Space Telescope, and $150 million for the Habitable Worlds Observatory (HWO), the next great astronomical observatory after JWST.
• Heliophysics: $875 million.

Space Technology: Seeding the Future

The Space Technology Mission Directorate (STMD) receives $920.5 million, a modest allocation that punches well above its weight in terms of impact on the commercial space sector. STMD funds the technologies that enable future missions and spin out to the private sector.

Priority areas include:

• Nuclear propulsion: DARPA ended the DRACO (Demonstration Rocket for Agile Cislunar Operations) flight demonstration, its partnership with NASA and Lockheed Martin, in 2025. The FY2026 appropriation still provides $110 million for nuclear thermal propulsion and $50 million for nuclear electric propulsion. Nuclear thermal propulsion could shorten Mars transit times substantially and is widely seen as important for sustained human Mars exploration.
• In-space manufacturing and assembly: Investments in on-orbit servicing, assembly, and manufacturing (OSAM) technologies. While the OSAM-1 refueling mission was canceled, the underlying technology investments continue through smaller programs.
• SBIR/STTR programs: Small Business Innovation Research and Small Business Technology Transfer awards, funded by law as a fixed share of NASA's extramural research budget. These programs are a critical funding pipeline for early-stage space startups.
• Tipping Point partnerships: Continued funding for Tipping Point contracts that co-invest with commercial companies in technologies near the threshold of commercial viability. Past Tipping Point awards have gone to companies developing lunar landers, in-space refueling, and advanced materials.

Space Operations: ISS Transition

The Space Operations Mission Directorate receives $4.18 billion (plus $250 million for the ISS from the reconciliation law). Its main line items:

• International Space Station: $1.24 billion in the appropriation, plus $250 million from the reconciliation law, for ISS operations and maintenance. With ISS retirement targeted for 2030, the budget includes increasing funding for the ISS deorbit vehicle (awarded to SpaceX) and transition planning to commercial successors.
• Commercial Crew Program (CCP): Crew transportation services from SpaceX (Crew Dragon) and Boeing (Starliner). SpaceX has become the primary crew transportation provider, with Crew Dragon flying regular rotation missions. Boeing's Starliner program has faced repeated delays and technical issues, though its crewed flight test in 2024 provided partial validation of the system. The CCP model (where NASA buys transportation as a service rather than owning the vehicle) has been transformative for the agency's cost structure.
• Commercial LEO Development (CLD): $273 million for commercial space station development. NASA's funded 2021 agreements went to Blue Origin (Orbital Reef) and Voyager Technologies (Starlab); Axiom Space holds a separate NASA contract to attach modules to the ISS, and Vast is building Haven-1 largely with private money. These companies must raise private capital alongside NASA's investment, creating a public-private partnership model for the next generation of orbital infrastructure.

Aeronautics: The Quiet Directorate

NASA's Aeronautics Research Mission Directorate (ARMD) receives $935 million, a small but important allocation that funds research in sustainable aviation, advanced air mobility, and hypersonics.

The most visible program is the X-59 Quesst quiet supersonic demonstrator, which is conducting community overflight testing to demonstrate that sonic booms can be reduced to sonic "thumps." If successful, the data could lead the FAA to revise the ban on overland supersonic flight, opening a market for companies like Boom Supersonic.

Commercial Crew and Cargo: The Model That Works

Across the budget, NASA's commercial partnership model continues to expand. The agency now relies on private companies for:

• Crew transportation: SpaceX Crew Dragon and Boeing Starliner
• Cargo delivery to ISS: SpaceX Dragon and Northrop Grumman Cygnus
• Lunar landers: SpaceX Starship HLS and Blue Origin Blue Moon
• Lunar cargo delivery: Commercial Lunar Payload Services (CLPS) contracts with Astrobotic, Intuitive Machines, and Firefly Aerospace
• Commercial space stations: Axiom, Blue Origin, Voyager (Starlab), and Vast
• Spacesuits: Axiom Space
• ISS deorbit: SpaceX

This model consistently delivers capabilities at lower cost and faster timelines than traditional cost-plus contracts. NASA's Commercial Crew Program delivered crew transportation for approximately $55 million per seat on Crew Dragon (NASA Inspector General, 2019), well below the roughly $80 million average (up to $86 million) NASA paid Russia per seat in its later Soyuz purchases during the gap between Shuttle retirement and Commercial Crew availability.

Impact on the Private Sector

NASA's roughly $24.4 billion FY2026 budget ripples through the private space sector in multiple ways:

• Direct contracts. Major prime contractors (Boeing, Lockheed Martin, Northrop Grumman, SpaceX, Aerojet Rocketdyne/L3Harris) receive the largest share of NASA contract dollars. The budget sustains manufacturing facilities, engineering workforces, and supply chains across nearly all 50 states.
• Subcontracts and supply chain. For every dollar that goes to a prime contractor, a portion flows to hundreds of subcontractors and suppliers. The Artemis program alone draws on suppliers in nearly every state.
• SBIR/STTR pipeline. Small business awards provide non-dilutive funding for startups that would otherwise struggle to attract venture capital at the earliest stages. These awards validate technology and provide references that help companies raise follow-on funding.
• Market creation. NASA's commercial programs do not just purchase services; they create markets. Commercial Crew created a human spaceflight market. CLPS is creating a lunar delivery market. CLD is creating a commercial space station market. These market-creation activities have multiplier effects far beyond NASA's direct spend.
• Technology transfer. NASA's technology investments often spin out to commercial applications. The agency's small satellite technology, advanced materials, and propulsion research benefit the broader industry even when they do not result in direct contracts.

What Is at Stake

NASA's FY2026 budget is adequate for maintaining current programs but insufficient for the ambitions the agency and the nation have articulated. Flat funding means painful trade-offs: Artemis schedule pressure, deferred science missions, and reliance on commercial partners to bear increasingly large shares of development cost and risk.

For the private sector, the budget signals continued opportunity in commercial services but growing pressure to deliver on fixed-price commitments. Companies that can execute on cost and schedule, as SpaceX has demonstrated repeatedly, will capture disproportionate share of NASA's commercial portfolio. Those that cannot will find the agency less patient than in the cost-plus era.

Monitor NASA budget allocations, contract awards, SBIR opportunities, and procurement forecasts with SpaceNexus Government Budgets, including real-time tracking of congressional appropriations and agency spending by directorate.