A Commercial Future in Low Earth Orbit

· By Montserrat Zeron ·

The International Space Station (ISS) stands as a prime example of a successful government-led space model, generating positive scientific, economic, and diplomatic outcomes over 25 years of continuous human presence in orbit. Yet despite far exceeding its intended 15-year operational lifespan, the ISS has also become an emblem of a past model increasingly incompatible with the rise of the commercial space sector and broader space economy, both of which seek to move beyond direct government operation.

While the station has become an indisputable cornerstone of low-Earth orbit (LEO) research, it now faces the physical costs of its longevity, with increasing reports of cracks, air leaks, and deteriorating components. As safety concerns mount, experts have warned that ISS risk management has reached an alarming level. The station's high annual operating cost—between $2 and $4 billion, accounting for roughly one-third of NASA's human spaceflight budget—also raises questions of its long-term economic sustainability.

With this in mind, NASA planned to retire the ISS and carry out a controlled deorbit by 2030 while transitioning low-Earth orbit operations to commercial providers. This shift aims to lower government costs, free resources for deep-space exploration and human spaceflight, and reduce NASA's infrastructure burden, enabling the agency to focus on leadership over direct operations in an increasingly commercial space environment.

The move away from a government-led model took shape through the Commercial LEO Destinations (CLD) program, NASA's plan to preserve the benefits of low-Earth orbit through commercial partnerships. The agency modeled the CLD program on the successful Commercial Crew and Cargo programs, where NASA fostered competition to develop industry alternatives for transporting astronauts and supplies to the ISS, serving as an anchor tenant through consistent financial backing, clear market signals, and technical requirements. Their success validated NASA's commercial partnership model, demonstrating that private industry could provide reliable ISS transportation at a lower cost while ending U.S. dependence on Russian Soyuz seats. SpaceX's initial price of $55 million per seat, for example, was well below the $86 million NASA had been paying Russia.

NASA's intent to empower commercial entities also reflects the urgency of scaling microgravity research and sustaining U.S. leadership in space as China’s ambitions continue to grow, particularly following the successful operation of the country’s Tiangong space station since 2021. 

Despite the benefits of a reduced government role and the urgency of a deteriorating ISS, NASA has struggled to deliver a successful commercial transition due to institutional and political barriers that have limited sustained investment, organizational transformation, and the adaptation of international partnerships for a commercially driven low-Earth orbit. 

A Commercial Alternative

While the commercial alternative was designed to improve efficiency and reduce costs through destinations that serve multiple government and private customers, its implementation has proven challenging over the years.

Back in 2017, Congress authorized NASA’s commercial future by directing the agency to prepare for an orderly transition away from the government-led ISS operating model. NASA’s 2018 transition report outlined the handoff of low-Earth orbit activities to commercial operators by 2025.

In 2020, NASA signed a contract with Axiom Space to attach commercial modules to the ISS, building the capacity and expertise needed for a commercial future in line with Congressional requirements.

A 2021 Bryce Tech report complicated the picture, confirming that while demand for commercial LEO manufacturing existed across 29 identified market segments, it was not self-sustaining. The market still required targeted government intervention to enable commercial production, address regulatory barriers, and provide certainty for investors.

That same year, NASA’s inspector general issued an audit report concluding that the agency faced serious structural problems that made its revised 2028 CLD goal likely unachievable. The audit identified limited market demand due to inadequate funding, with Congress appropriating just $72 million of the $450 million requested and causing a three-year procurement delay. It also highlighted unreliable cost estimates ranging from $5.1 to $37.5 billion and unclear requirements that prevented industry partners from properly scoping their designs. The report concluded that without further extension of the ISS, the U.S. would likely face a gap in low-Earth orbit access.

The Politics of Change

A central challenge to the CLD transition lies in NASA’s funding structure, which is shaped by the U.S. appropriations process and often conflicts with the sustained investment required for commercial development. Unlike the European Space Agency (ESA) or the Japan Aerospace Exploration Agency (JAXA), which operate on multi-year institutional planning, NASA must justify its budget annually to a Congress balancing competing policy and political priorities. This annual process often undermines strategic continuity, affecting the direction of an agency operating under a mentality of scarcity while subjecting NASA to the political priorities of those who wield the power of the purse. Appropriators whose districts benefit from NASA’s current model have a strong incentive to preserve current ISS operations, with less motivation to fund the reduction of the agency’s footprint. 

Congress recently justified extending ISS operations to 2032 based on delays in a commercial alternative. This decision would keep CLD funding levels modest relative to what a full-scale commercial transition would require.

These developments have left NASA structurally conflicted. Congress has constrained budgets while seeking both ISS extension and CLD development simultaneously, leaving NASA incentivized to preserve control and unable to commit funding at the level analysts say the program needs. The result is an agency committed, in name, to a commercial transition but structurally designed to maintain the status quo. 

Pitfalls in Pricing

Partnerships are central to the commercial transition, but the pricing mechanisms that supported the ISS are difficult to transfer to CLDs. NASA adopted a barter agreement to cover common system operation costs for the non-Russian segments of the ISS, allowing partner nations to reimburse NASA through investment in their domestic industries and avoid direct cash transfers between governments. This arrangement helped offset NASA’s ISS operating costs while reinforcing international participation in the program. 

However, the barter model is incompatible with a commercial space station market. Because CLD operators must establish prices without equivalent hardware or service exchanges, international partners would need to transition toward direct cash agreements with private companies. NASA’s 2019 ISS pricing policy for commercial users was intentionally set low to encourage participation, but this approach may not be sustainable under the CLD model, where private operators must establish prices that support long-term operations. 

The geopolitical implications of this commercial transition could be significant. If a replacement for ISS barter agreements cannot be effectively integrated into the commercial model, the U.S. risks losing a diplomatic tool that has sustained international participation in its human spaceflight programs for decades. NASA leadership, diplomats, and policymakers will therefore need new mechanisms to maintain these partnerships in the era of the Artemis Accords and commercial space stations.

Some nations have already begun adapting to this model by purchasing access through commercial providers. Since 2022, countries including Saudi Arabia, Turkey, Sweden, India, and Poland have directly purchased seats from Axiom Space for short-duration ISS missions, a practice expected to continue.

NASA’s Anchor Tenant Problem 

The CLD model depended on NASA serving as an anchor tenant to stimulate private investment, but uncertainty over the agency’s commitment has raised questions about whether the commercial approach can succeed. 

In March 2026, NASA officials stated that there was no independently verifiable market research confirming the economic viability of a commercial space station that the agency only partially funded. Instead, the agency announced plans to develop a core module derived from the ISS, allowing commercial modules to dock and detach after the station's deorbit. This approach marked a significant departure from the free-flying CLD model that NASA had originally envisioned and that industry partners had invested in for years.

Returning to a government-led model was justified by the assessment that the commercial approach had failed to close its business case. Congress failed to provide sustained funding, while NASA, unwilling to relinquish operational control, did not commit the resources necessary for a true transition. A successful commercial shift would have required ceding mission control, replacing the ISS barter framework with industry-based agreements, and restructuring NASA's human spaceflight workforce–an institutional transformation the agency was not prepared to embrace.

NASA’s pivot further eroded confidence among its industry partners. Although the agency ultimately abandoned the core module concept and returned to its original commercial strategy after receiving extensive feedback from industry, the reversal highlighted the uncertainty surrounding its role as an anchor tenant.

The Issue of CLD Economics

At the core of the CLD transition is the assumption that low Earth orbit activities can become commercially sustainable. For CLDs to be economically viable, they must present a positive business case that generates sufficient revenue to offset the costs of development and operation. Operating a station could cost between $463 million and $2.25 billion annually, while revenues may only reach $455 million to $1.187 billion. Under this model, only the highest-revenue, lowest-cost scenario generated a profit. From this perspective, CLDs remain a risky and uncertain prospect for venture capitalists, who are unlikely to invest until projected revenues show greater potential.

Despite these challenges, CLD operators remain optimistic, provided NASA demonstrates reliability as a partner. A station could be profitable if NASA covers 40 to 60 percent of its development costs. Under this model, companies may only need to support one six-month NASA mission and one 30-day private mission with an international astronaut annually to make a profit without depending on revenue from tourism or in-space manufacturing. Additionally, anticipated reductions in launch costs from SpaceX’s Starship could further improve CLD economics.

Building a Commercial Future

Despite these challenges, optimism remains for the commercial LEO market. Demand is real, technology continues to advance, and Commercial Crew and Cargo have demonstrated that public-private partnerships can succeed when supported by sustained congressional funding and commitment from NASA.

Competing CLD models represent different approaches to developing a sustainable LEO economy while racing the timeline of a deteriorating ISS. The closest to completion is currently Vast, with Haven-1 targeting a 2027 launch aboard a SpaceX Falcon 9 to demonstrate its technology before the larger Haven-2. Starlab has fully booked the commercial payload capacity of its first mission and carries some of the strongest international industrial partnerships among competitors, with launch planned for 2029. Blue Origin's Orbital Reef could benefit from vertical integration by leveraging its own launch capabilities, though the recent explosion of its New Glenn rocket may complicate that strategy. Axiom, having already flown four private astronaut missions, is first developing modules attached to ISS infrastructure, reducing early operational risk while remaining tied to the station’s timeline.

While none of these approaches solve NASA’s anchor tenant problem, they demonstrate that industry remains committed to building a commercial future in LEO. The success of this transition will ultimately depend less on technological capability than on whether NASA and Congress can commit to the funding stability, institutional change, and long-term vision required to move beyond the ISS model. The question now is whether NASA can overcome the remaining challenges to embrace the commercial future set in motion nearly a decade ago.