Record Data Sheet
NASA’s Artemis program was projected to cost $93 billion through fiscal year 2025. New mission plans, rising contract values and incomplete cost estimates raise a bigger question: how much will it ultimately cost to establish a sustained human presence on the Moon?
Returning astronauts to the Moon is not a single engineering project. It is a long-term investment in launch vehicles, crew spacecraft, lunar landers, ground infrastructure and the technology required to keep humans operating beyond Earth.
The financial scale is already substantial. In November 2021, NASA’s Office of Inspector General (OIG) projected that the Artemis effort would cost $93 billion from fiscal year 2012 through fiscal year 2025. That figure was a historical projection, not a final audited total, and it should not be mistaken for the current cost of completing the program.
Since then, NASA has changed its mission architecture. In 2026, the Government Accountability Office (GAO) reported that several Artemis projects were under review following changes to planned missions, while the agency continued to face challenges in cost transparency and acquisition management.
The available evidence reveals three distinct financial questions: what NASA has committed to building, how much individual systems cost, and whether the agency can accurately calculate the full cost of returning humans to the lunar surface.
Record Data Sheet
| Field | Details |
|---|---|
| Program | NASA Artemis |
| Entity | National Aeronautics and Space Administration (NASA) |
| Vertical | Space, Government Expenditure, Infrastructure |
| Record Type | Government Program Cost |
| Historical Cost Projection | $93 billion through FY2025 |
| Projection Published | November 2021 |
| Principal Cost Oversight | NASA OIG and U.S. GAO |
| Current Status | Active program; mission architecture and several project estimates under review |
| Primary Sources | NASA OIG, GAO, NASA budget documents |
The $93 billion figure covers the wider Artemis effort from FY2012 through FY2025, according to the NASA OIG’s November 2021 analysis. It is not a verified final expenditure figure or a current estimate of the program’s remaining cost.
1. The $93 Billion Question: What Is Included?
The NASA OIG’s November 2021 report, NASA’s Management of the Artemis Missions, estimated that the program would require approximately $93 billion through FY2025.
The estimate included $40 billion spent during FY2012, FY2020 and a projected $53 billion for FY2021, FY2025. The latter figure incorporated costs beyond NASA’s initial estimates for the first three missions, including future launch systems, additional Orion spacecraft, Gateway-related work and other activities distributed across NASA directorates.
Table 1. Historical Artemis Cost Projection
| Period | Amount | Financial classification |
|---|---|---|
| FY2012, FY2020 | $40 billion | Historical costs identified by NASA OIG |
| FY2021, FY2025 | $53 billion | Projection incorporating planned program costs |
| Total through FY2025 | $93 billion | Historical program cost projection |
Source: NASA Office of Inspector General, IG-22-003.
The distinction between the two periods matters. The first represents costs identified through NASA’s accounting systems, while the second was a projection based on budget plans and operating estimates. The combined $93 billion figure therefore should not be described as $93 billion of independently verified final expenditure.
It also does not establish how much NASA will ultimately spend. Subsequent mission changes have altered the program’s scope, and some costs are still being reassessed.
2. How Much Does One Artemis Launch Cost?
One of the most striking figures in the program is the estimated cost of operating the Space Launch System (SLS) and Orion spacecraft.
In its 2021 analysis, NASA OIG estimated that producing and operating the SLS/Orion system for the first four Artemis missions would cost approximately $4.1 billion per launch.
Table 2. Estimated Cost Per SLS/Orion Launch
| Component | Estimated cost |
|---|---|
| Space Launch System (SLS) | $2.200 billion |
| Orion crew spacecraft | $1.000 billion |
| European Service Module | $300 million |
| Exploration Ground Systems | $568 million |
| Total | $4.068 billion |
| Rounded estimate published by NASA OIG | $4.1 billion |
Source: NASA OIG, NASA’s Management of the Artemis Missions.
These are historical estimates for the early Artemis missions, not current commercial launch prices. They also do not represent the full lifetime cost of the program. The calculation excluded certain parallel development activities, including next-generation technologies and additional infrastructure.
The figures nevertheless illustrate the economics of a human lunar mission. A large share of the cost is tied to building and operating a specialised launch system, rather than simply paying for the launch itself.
For context, a launch-cost comparison is only meaningful when the mission, payload, development costs, production model and operational scope are defined. Comparing the $4.1 billion estimate directly with a commercial launch price would omit major differences in what each figure covers.
3. Where the Cost Estimates Stand Today
The latest detailed GAO assessment, published in July 2026, provides a more recent view of individual Artemis-related projects. It compares their original life-cycle cost baselines with the latest estimates available to the auditors.
The figures below were collected as of January 2026. They are not all final: NASA had paused or stopped work on several projects, and some estimates were under review.
Table 3. Artemis Project Cost Estimates
| Project | Original baseline | Latest reported estimate | Change |
|---|---|---|---|
| Orion crew spacecraft | $11.284bn | $14.756bn | +30.8% |
| Solar Electric Propulsion | $335.6m | $402.4m | +19.9% |
| SLS Block 1B | $4.953bn | $5.182bn | +4.6% |
| Gateway Initial Capability | $5.281bn | $5.281bn | No reported change |
| Human Landing System, Initial Capability | $4.878bn | $4.878bn | No reported change |
| Mobile Launcher 2 | $1.873bn | $1.873bn | No reported change |
Source: U.S. Government Accountability Office, GAO-26-108556, Appendix IV. Percentage changes calculated from the published estimates.
Important qualification: these figures are not a complete Artemis budget and should not be added together to produce a definitive program total. They cover selected projects, may include different program boundaries and reflect estimates made before or during subsequent mission changes.
The distinction is particularly important for Gateway, SLS Block 1B and Mobile Launcher 2. NASA announced pauses or changes to these projects in 2026, meaning their previously reported costs and schedules no longer necessarily describe the program as it will be completed.
Orion provides a clearer example of cost growth. Its reported life-cycle estimate increased from approximately $11.3 billion to $14.8 billion, a rise of about $3.5 billion. The GAO also reported that Orion accounted for more than half of the annual cost overruns across NASA’s major projects in development and almost 75% of their cumulative cost overruns in its 2026 assessment.
That does not mean every dollar of the increase represents waste. Complex spacecraft development involves testing, redesign, integration and technical risks. The financial question is whether the additional expenditure is understood, justified and controlled.
4. The Cost of Changing the Plan
Large engineering programs rarely remain static over a decade. But changing the architecture after substantial development has begun can create costs that are difficult to recover.
In June 2026, NASA OIG published an assessment of Artemis systems that had been cancelled or repurposed following changes to the campaign. The review covered the Exploration Upper Stage, Universal Stage Adapter, Mobile Launcher 2 and Gateway Habitation and Logistics Outpost.
The combined contract value of the efforts examined increased from $2.8 billion to $5.9 billion, while delivery dates were extended by as much as seven years.
Table 4. Contract Value of Cancelled or Repurposed Artemis Systems
| Measure | Amount |
|---|---|
| Combined original contract value | $2.8 billion |
| Combined subsequent contract value | $5.9 billion |
| Absolute increase | $3.1 billion |
| Increase relative to original value | 110.7% |
| Maximum reported delivery extension | 7 years |
Source: NASA OIG, NASA’s Management of Programs and Projects after Mission Termination, June 24, 2026.
The 110.7% increase is calculated from the two combined contract values reported by NASA OIG. It should not be interpreted as a 110.7% overrun on a completed, unchanged project: the systems were affected by changing requirements, cancellation or repurposing.
The financial lesson is more subtle. A contract can become more expensive even when its original intended capability is no longer delivered in the same form. When the program changes direction, the relevant question is not just how much has been spent, but how much of the investment remains useful under the revised plan.
For governments, this is a capital-allocation problem as much as an engineering one. Money already committed to a particular design may not be recoverable, while a new architecture requires additional development and testing.
5. Why the Total Cost of Artemis Is Difficult to Calculate
A program-wide cost estimate should include all the work necessary to complete the intended mission, not merely the contracts that have a formal cost baseline.
That is where NASA’s financial reporting has faced persistent challenges.
In its 2024 review of the Artemis lunar landing plans, GAO noted that NASA had not established a comprehensive official cost estimate for the entire Artemis III mission. The agency had requested $6.8 billion to support Artemis III-related programs in its FY2024 budget request, but that figure did not establish the full cost of the mission.
In its July 2026 assessment, GAO again highlighted the need for greater transparency into Artemis program and mission costs. It also reported that NASA had not fully implemented some earlier recommendations on cost transparency and program cost and schedule controls.
Table 5. Three Different Measures of Program Cost
| Measure | What it tells us | What it does not tell us |
|---|---|---|
| Budget appropriation | How much funding Congress authorises | How much has actually been spent |
| Contract or project estimate | The expected cost of a defined scope of work | The full cost of every activity needed for a mission |
| Program life-cycle estimate | The expected cost across a defined program scope and period | A guaranteed final cost if assumptions or plans change |
Sources: GAO, Artemis Programs: Lunar Landing Plans Are Progressing but Challenges Remain and GAO, NASA: Assessments of Major Projects, 2026.
These distinctions explain why apparently conflicting Artemis figures can all be legitimate. One may describe a contract, another a project’s development and operations, and another the cost of the wider lunar program across multiple NASA directorates.
The most useful number is therefore not necessarily the largest one. It is the number whose scope, time period and accounting basis are clearly defined.
6. What the Numbers Say About Public Investment
Artemis is intended to return astronauts to the lunar surface and establish the foundations for sustained human exploration. Its value cannot be measured solely by the cost of a launch or the number of missions completed.
The program also funds engineering capabilities, scientific research, industrial contracts and infrastructure that may support future missions. Those potential benefits matter, but they should be evaluated separately from expenditure.
Three conclusions emerge from the available figures.
First, launch economics remain a central constraint. NASA OIG’s historical $4.1 billion estimate for each of the first four SLS/Orion launches illustrates how expensive the program’s initial operating model was. A lower cost per mission would make repeated exploration more financially sustainable, provided the changes preserve safety and mission capability.
Second, design changes create financial exposure. The increase in combined contract values from $2.8 billion to $5.9 billion for cancelled or repurposed systems shows how expensive a change in direction can become. Future program assessments should distinguish the value of work completed, the cost of termination and the value of any hardware or technology retained for later use.
Third, transparency is part of cost control. Without a credible estimate covering the full mission, decision-makers cannot reliably compare the cost of completing the existing plan with the cost of changing it. Better reporting would also make it easier to determine whether delays reflect technical difficulties, procurement decisions or changing policy priorities.
None of these conclusions means the program should be judged only by whether it stays within its initial budget. They mean that its costs should be measured consistently against the objectives it is expected to deliver.
7. How Much Will It Ultimately Cost to Return to the Moon?
There is no single definitive figure in the sources examined here that establishes the final cost of returning astronauts to the Moon and maintaining a sustained lunar presence.
The $93 billion estimate remains a useful historical benchmark for the wider Artemis effort through FY2025, but it is not a final audited total. The $4.1 billion figure describes the estimated production and operating cost of an early SLS/Orion launch, while the GAO’s project-level estimates cover selected components and are being reassessed following changes announced in 2026.
A credible final estimate would need to combine the cost of launch systems, crew spacecraft, lunar landers, ground operations, mission execution and other necessary capabilities, while accounting for changes in scope and avoiding double-counting shared program costs.
Until NASA publishes a sufficiently comprehensive and current estimate, the full financial commitment remains uncertain.
The more useful question for taxpayers and policymakers is not simply how much it costs to reach the Moon once. It is how much it will cost to make lunar exploration repeatable, safe and sustainable, and how much capability the United States will obtain for every additional dollar invested.
Sources
- NASA Office of Inspector General. NASA’s Management of the Artemis Missions (IG-22-003, November 15, 2021). Historical program cost projection and estimated SLS/Orion cost per launch. Read the report.
- U.S. Government Accountability Office. NASA: Assessments of Major Projects (GAO-26-108556, July 23, 2026). Project-level cost and schedule estimates, mission changes and oversight findings. Read the report.
- NASA Office of Inspector General. NASA’s Management of Programs and Projects after Mission Termination, Canceled or Repurposed Artemis Campaign Systems (June 24, 2026). Contract values and delivery delays for affected systems. Read the report.
- U.S. Government Accountability Office. NASA Artemis Programs: Lunar Landing Plans Are Progressing but Challenges Remain (GAO-24-107249, January 17, 2024). Mission-cost transparency and the Artemis III estimate. Read the report.