Elon Musk’s SpaceX has poured more than $15 billion into developing its massive Starship rocket system, according to IPO documents obtained by Reuters, representing an enormous financial commitment as the company approaches nearly a decade of work perfecting a completely reusable launch vehicle.
The enormous investment vastly exceeds the approximately $400 million SpaceX invested in creating its reliable Falcon 9 rocket, which currently dominates the commercial launch market. Starship represents the cornerstone of SpaceX’s future operations as the company prepares for public trading with a valuation of $1.75 trillion.
The towering two-stage rocket system is essential to Musk’s grand vision of deploying larger groups of Starlink satellites, transporting astronauts to lunar and Martian destinations, and eventually launching thousands of artificial intelligence computing satellites to serve as space-based alternatives to energy-intensive Earth-based data centers.
“We have continued to invest significantly in further increasing our lead by pursuing full and rapid reusability at scale, including investing over $15 billion in our next-generation rocket, Starship,” SpaceX stated in its confidential IPO registration documents.
According to the filing, SpaceX plans to begin deploying its next-generation Starlink satellites, designated V3, during the latter half of 2026. These advanced satellites will likely launch aboard Starship, which features a cargo bay specifically designed to accommodate up to 60 of the upgraded satellites per mission.
This capacity represents a significant improvement over Falcon 9’s typical payload of approximately 24 smaller Starlink satellites, demonstrating how closely Starship’s performance is tied to Starlink’s financial viability.
Development of Starship now represents the majority of SpaceX’s research investments. The company allocated $3 billion to space segment research and development in 2025, with the entire amount directed toward the Starship program, according to filing documents. This marks a substantial increase from the previous year’s $1.8 billion investment.
Since 2023, SpaceX has completed 11 Starship test missions, experiencing both dramatic setbacks and remarkable achievements. Notable successes include capturing the rocket’s enormous Super Heavy booster using giant mechanical arms upon its return to Earth, a technique intended to significantly improve reusability efficiency.
Despite these advances, SpaceX acknowledges in its filing that numerous unprecedented obstacles must be overcome before Starship can achieve Musk’s ambitious target of “thousands of launches per year.” The company indicates this launch frequency would be necessary to deploy 100 gigawatts of solar-powered AI satellites annually, equivalent to roughly one-quarter of America’s yearly energy consumption.
“They’re getting really close,” commented Chris Quilty, president of Quilty Space, a space and satellite industry research company. “But what we still don’t know, and won’t know for a while is, can they do it repeatedly?”
Among Starship’s most significant challenges is constructing the massive ground infrastructure required to support Musk’s desired launch frequency, including fuel supply systems, water infrastructure, and developing a heat shield capable of withstanding multiple atmospheric re-entries for the main spacecraft.
Each Starship launch requires natural gas equivalent to 244 tanker trucks, according to Federal Aviation Administration analysis. Approximately one million gallons of water are needed to suppress the rocket’s powerful acoustic vibrations during takeoff.
“There is not enough water in the water system to support the launch of Starship” at such a massive scale, Quilty explained.
Another major hurdle involves in-orbit refueling, an untested and dangerous procedure requiring Starships to dock with tanker variants to transfer fuel. This capability would be crucial for deep space missions and would require multiple Starship launches to accomplish.
“That’s probably the last big challenge,” said Hans Koenigsmann, former SpaceX Vice President of Flight Reliability and one of the company’s founding employees. “If that happens, then I think from then on it should be more or less, success.”
The complexity increases due to the propellant requirements. Liquid oxygen must remain at extremely cold temperatures and be perfectly sealed to prevent leakage into space.
“In-orbit refueling is complex, and we have not yet demonstrated or attempted it,” SpaceX acknowledged in its filing.
“We may not be able to develop, commercialize, scale, or successfully implement these or other strategic initiatives on the timelines we currently anticipate, or at all,” the company added.
During the past decade, SpaceX has constructed an extensive development facility in South Texas called Starbase, dedicated entirely to Starship operations. The facility supports a manufacturing approach designed to produce rockets at speeds comparable to commercial aircraft rather than traditional spacecraft.
“When you build up your production before you actually have the product, you obviously run the risk that if you change your mind… every change on the rocket has a change on the factory now too,” Koenigsmann explained.
Test failures have necessitated hundreds of design modifications to the vehicle. Koenigsmann characterized Starship as “a totally different animal” compared to Falcon 9.
SpaceX is currently preparing for its first Starship test mission since October, representing the program’s longest gap between flights. The upcoming mission will introduce the Starship V3 prototype.
“Version 3 is basically a clean-sheet design of the ship,” stated Charlie Cox, Director of Starship Engineering, in a video SpaceX released on X Friday.
The V3 Starship, featuring dozens of critical improvements, is designed for orbital missions, extended space testing, and crewed lunar landings—the rocket’s most demanding mission type for which NASA has paid SpaceX at least $3 billion through its Artemis moon program.
“That Version 3 is what HLS is going to be based on,” said Kent Chojnacki, Deputy Manager of NASA’s Human Landing System program. “A lot’s gonna be dependent on this first flight.”
