Commercial Crew Program: How NASA Buys Rides to Space

For nine years after the Space Shuttle retired in 2011, NASA had no American vehicle to fly astronauts to space. Every seat to the International Space Station required purchasing a ride on Russia's Soyuz spacecraft at prices that climbed from $21 million per seat in 2006 to over $90 million per seat by 2020. It was an expensive, geopolitically uncomfortable dependency.

The Commercial Crew Program (CCP) was NASA's answer, a fundamentally different approach to human spaceflight that bet on the private sector to build, own, and operate crew vehicles while NASA bought rides as a customer. That bet has paid off spectacularly with SpaceX's Crew Dragon, while Boeing's Starliner has been a cautionary tale about the challenges of fixed-price contracts.

How the Commercial Crew Model Works

The Commercial Crew Program represents a paradigm shift from how NASA traditionally procured human spaceflight systems:

Traditional Model (Apollo, Shuttle)

• NASA designs the vehicle and writes detailed specifications
• Contractors build to NASA's specifications under cost-plus contracts (NASA pays costs + a fee)
• NASA owns the vehicle and all intellectual property
• Contractor has limited incentive to control costs (cost overruns simply increase the contract value)

Commercial Crew Model

• NASA specifies requirements and safety standards but not the vehicle design
• Companies design, build, and own their own vehicles under fixed-price contracts
• The company retains intellectual property and can sell excess capacity to other customers
• NASA buys crew transportation services, seats on flights, rather than hardware
• Companies bear financial risk for cost overruns (incentivizing efficiency)

This model, pioneered by the Commercial Orbital Transportation Services (COTS) program that produced SpaceX's Dragon cargo vehicle and Orbital Sciences' Cygnus, treats spaceflight more like purchasing airline tickets than commissioning custom aircraft.

The Two Providers

SpaceX Crew Dragon

SpaceX's Crew Dragon, flying atop the Falcon 9 rocket, has become the workhorse of American human spaceflight:

• First crewed flight: Demo-2 in May 2020 (Doug Hurley and Bob Behnken)
• Operational missions completed: Crew-1 through Crew-9+ (as of 2026)
• Crew capacity: 4 astronauts (7 possible in alternate configuration)
• Contract value: $2.6 billion for development + $2.8 billion for 6 operational missions (initial contract)
• Cost per seat: ~$55 million, roughly 40% less than Soyuz's peak pricing
• Safety record: Perfect, no loss-of-crew incidents across all missions
• Abort capability: SuperDraco engines provide launch escape at any point during ascent

Crew Dragon has also flown private missions: Inspiration4 (the first all-civilian orbital flight), Axiom missions (Ax-1 through Ax-4 to the ISS), and Polaris Dawn (the first commercial EVA). This dual-use capability validates the commercial crew model: the same vehicle serves NASA, private customers, and international partners.

Boeing Starliner

Boeing's CST-100 Starliner has had a troubled development path:

• Contract value: $4.2 billion for development + $4.4 billion for 6 operational missions, significantly more than SpaceX despite similar capabilities
• OFT-1 (Dec 2019): Uncrewed test flight failed to reach the ISS due to software errors, a mission timer bug and a thruster mapping error that could have caused a catastrophic collision
• OFT-2 (May 2022): Second uncrewed test reached the ISS successfully, though with thruster anomalies and thermal protection issues
• CFT (June 2024): The crewed flight test with Butch Wilmore and Suni Williams docked at the ISS, but thruster failures and helium leaks led NASA to judge the vehicle too risky for crew return. The astronauts returned on SpaceX Crew Dragon in February 2025 after spending 8 months on the ISS instead of the planned 8 days.
• Status in 2026: Boeing's path to operational Starliner flights remains uncertain, with the company having taken over $1.6 billion in charges against the fixed-price contract

The Economics of Commercial Crew

The commercial crew model has been a financial success for NASA by several measures:

• Development cost savings: NASA's Inspector General estimated that developing crew transportation internally would have cost $5-8 billion per vehicle, versus the $2.6-4.2 billion paid to SpaceX and Boeing under fixed-price contracts
• Per-seat costs: SpaceX charges roughly $55 million per seat, compared to $90M+ for Soyuz. At 4 seats per mission, that's $220M per flight versus $360M+ for equivalent Soyuz capacity
• Schedule flexibility: With two providers (eventually), NASA has backup if one vehicle is grounded, unlike the post-Shuttle era when Soyuz was the only option
• Commercial market creation: SpaceX's ability to sell excess Crew Dragon capacity to private customers generates revenue that subsidizes NASA's per-seat cost and builds a broader market

Safety Oversight

A common concern about commercial crew is whether private companies can be trusted with astronaut safety. NASA addresses this through rigorous oversight:

• Loss-of-crew probability: NASA requires a maximum 1-in-270 probability of loss-of-crew across the mission, a standard that both providers must demonstrate through analysis, testing, and flight data
• NASA insight/oversight: NASA embeds engineers and safety personnel at contractor facilities, reviews design decisions, and conducts independent assessments
• Certification: Each vehicle must complete an extensive certification process including uncrewed and crewed flight tests before being approved for operational missions
• Continuous monitoring: NASA's Aerospace Safety Advisory Panel (ASAP) and independent review boards provide external oversight

The Starliner CFT experience demonstrated this system working as designed: NASA refused to fly crew home on a vehicle it judged too risky, even though that decision was politically and financially painful for Boeing.

Lessons for Future Programs

Commercial Crew has established a template that NASA is applying to other programs:

• Commercial LEO Destinations (CLD): NASA is using the same fixed-price, services-based model to fund commercial space stations that will replace the ISS
• Human Landing System (HLS): SpaceX's Starship HLS and Blue Origin's Blue Moon lander were selected under similar commercial contracts for Artemis lunar landings
• Commercial cargo: The model originated with COTS/CRS contracts that enabled SpaceX's Dragon and Northrop Grumman's Cygnus for ISS cargo delivery
• Mars exploration: Future Mars missions may use commercial services for transportation, habitat modules, and surface systems

The core lesson: when NASA specifies what it needs rather than how to build it, and when companies bear financial risk for performance, the result is faster development, lower costs, and vehicles that serve multiple customers, growing the overall market.

What's Next for Commercial Crew

Looking ahead through 2026 and beyond:

• SpaceX Crew Dragon: Continues regular ISS rotations (Crew-10, Crew-11, and beyond), plus private missions and Polaris program flights
• Boeing Starliner: Decision point on whether to attempt another crewed test or transition resources to other programs
• Dream Chaser (Sierra Space): While not a crew vehicle (yet), the Dream Chaser cargo spaceplane represents another commercial model for ISS servicing
• SpaceX Starship: If certified for crew, Starship could eventually offer dramatically higher capacity at lower per-seat costs for deep space missions

Track Commercial Crew Missions on SpaceNexus

SpaceNexus's Mission Pipeline tracks all upcoming crew launches, including Commercial Crew missions to the ISS, Axiom private astronaut missions, and future lunar landing missions. Follow the complete manifest of human spaceflight missions from development through launch and landing.

Explore the Mission Pipeline on SpaceNexus