The ISS will be replaced, but not all at once, and not by a single station

The International Space Station is not being retired as a whole project. Instead, NASA and its partners plan to shift to a mix of smaller, specialized orbital facilities over the next decade. The ISS itself will likely be deorbited around 2030 or 2031, but commercial space stations and government modules will begin operating before that happens. The transition is already underway — companies like Axiom Space and Orbital Reef have contracts to build and operate their own stations in low Earth orbit.

The replacement strategy differs from the ISS model in a fundamental way: instead of one massive government-owned laboratory shared by multiple nations, the future will include both commercial stations run for profit and government-owned modules that can dock to them. This means some research and manufacturing will happen on private stations, some on government facilities, and some on both.

Key Takeaways

  • NASA plans to stop funding the ISS around 2030 and shift operations to commercial space stations built by private companies.
  • Axiom Space is building the first commercial station with modules that will initially attach to the ISS before becoming independent.
  • The ISS will be deorbited in a controlled descent, likely between 2030 and 2032, rather than left to fall unpredictably.
  • Government agencies including NASA, ESA, and JAXA will rent space on commercial stations instead of owning and operating their own orbital laboratory.
  • The transition is designed to reduce government spending while keeping continuous human presence in orbit.

Why the ISS is being replaced now

The ISS has been continuously occupied since November 2000 and was originally designed to operate for about 15 years. It has been extended multiple times and is now aging — its modules are showing wear, maintenance costs are rising, and some systems are becoming harder to repair. NASA estimates the cost to keep the ISS running through 2030 at roughly $3 to 4 billion per year, a figure that does not include launch costs for crew and cargo.

The shift to commercial stations is partly financial and partly strategic. NASA wants to move away from being the sole operator of orbital infrastructure and instead become a customer that rents laboratory space. This model allows the agency to fund multiple stations at lower cost than maintaining one massive facility, and it opens the door for private companies to profit from space-based manufacturing, tourism, and research.

Axiom Space and the first commercial station

Axiom Space has the most advanced plan for a commercial replacement. The company is building modules that will dock to the ISS starting in 2026, initially serving as an extension of the existing station. Over time, Axiom will add more modules until it has enough to function independently. When the ISS is deorbited, Axiom's station will separate and continue operating as a free-flying facility.

Axiom's modules will include research laboratories, manufacturing facilities, and crew quarters. The company plans to sell time to government agencies, private researchers, and companies interested in microgravity manufacturing. NASA has already signed a contract to use Axiom's station for some of its research after the ISS is retired.

Other commercial stations in development

Axiom is not the only company building orbital infrastructure. Orbital Reef, a partnership between Blue Origin and Sierra Space, is designing a station with modules for research, manufacturing, and tourism. Orbital Reef is expected to begin operations in the late 2020s, overlapping with Axiom's timeline.

Nanoracks, a company that currently operates a commercial module attached to the ISS, is also developing its own free-flying station. These competing facilities mean that by 2032 or 2033, there will likely be multiple stations in orbit, each with different capabilities and pricing. Researchers and companies will choose based on what they need and what they can afford.

What happens to the ISS when it is deorbited

The ISS will not straightforward be abandoned or left to fall randomly. NASA and its international partners have planned a controlled deorbit — a series of burns that will lower the station's orbit until it enters the atmosphere and breaks apart over the ocean, far from populated areas. This process will take weeks and will be coordinated with space agencies worldwide.

The deorbit is scheduled to happen between 2030 and 2032, depending on funding and the condition of the station at that time. A specialized spacecraft, likely a cargo vehicle or a dedicated deorbit tug, will perform the burns. The goal is to may support that any debris that survives re-entry falls into the Pacific Ocean, where it poses no risk to people or infrastructure.

Government agencies' role in the new model

NASA, the European Space Agency (ESA), the Japan Aerospace Exploration Agency (JAXA), and other government space agencies will not disappear from orbit — they will straightforward change how they operate. Instead of owning and maintaining the ISS, these agencies will rent laboratory space on commercial stations. This is similar to how universities rent lab space in office buildings rather than owning entire buildings.

Some government agencies are also building their own modules that will dock to commercial stations. For example, NASA is developing a habitat module that could be attached to Axiom's station. This hybrid approach allows governments to maintain some control over their research while reducing operational costs.

Timeline for the transition

The transition from ISS to commercial stations is already happening. Axiom's first module is scheduled to dock in 2026. By 2028 or 2029, multiple commercial stations should be operational or nearing completion. The ISS will continue to operate during this period, allowing researchers to move their work gradually to the new facilities.

The final phase — deorbiting the ISS — will occur between 2030 and 2032. This gives commercial stations time to prove they can support the research and operations that currently happen on the ISS. If a commercial station fails or falls behind schedule, NASA has the option to extend ISS operations, though this would increase costs.

What research will move to the new stations

The research currently done on the ISS covers materials science, biology, physics, and Earth observation. Most of this work will continue on commercial stations, though some experiments may be modified to fit the different configurations and capabilities of the new facilities. Some research may shift to ground-based labs or to other platforms like suborbital vehicles.

Manufacturing in microgravity is expected to grow on commercial stations. Companies are interested in producing fiber optics, pharmaceuticals, and advanced materials that are difficult or impossible to make on Earth. Commercial stations will have more flexibility to accommodate manufacturing equipment than the ISS does, since they are designed from the start with profit-generating activities in mind.

Frequently Asked Questions

Will there be a gap in time when no one is in orbit?

No. Commercial stations are expected to be operational before the ISS is deorbited, so there will be continuous human presence in low Earth orbit. The exact timing depends on how quickly commercial stations complete their construction and pass safety reviews, but the plan is designed to avoid any gap.

Can other countries use the new commercial stations?

Yes, but access will depend on contracts and payment. Commercial stations will sell time to any government or company that can afford it, unlike the ISS, which was shared among partner nations. This means some countries may have less access to orbital research facilities unless they negotiate agreements with the commercial operators.

Why not just repair and keep using the ISS?

The ISS is aging and some of its systems are reaching the end of their design life. Repairs are becoming more expensive and complex. Shifting to commercial stations allows NASA to reduce spending while maintaining research capabilities. The ISS was also designed as a temporary facility, and extending it indefinitely would eventually become more costly than building new stations.

Who will own the commercial stations?

Private companies like Axiom Space and Blue Origin will own and operate the commercial stations. They will rent space to government agencies, researchers, and companies. This is different from the ISS, which is owned jointly by the participating nations and operated as a government facility.

What if a commercial station goes out of business?

If a commercial operator fails, research and operations would shift to other available stations. This is one reason NASA is supporting multiple commercial stations rather than relying on a single replacement. Having competing facilities provides backup and ensures that the loss of one operator does not shut down all orbital research.