Rocket Lab's Backlog Just Hit $2.4 Billion. Here's Why Neutron's First Flight Matters More.

Rocket Lab's (NASDAQ: RKLB) recently released second-quarter results revealed that the company has $2.36 billion in contract backlogs. It's an impressive amount and signals the rocket company is attracting customers. But some of that potential revenue, and it's only potential right now, is dependent on the successful flight of the company's all-important Neutron rocket.

Management has said that Neutron is expected to be on the launchpad in the fourth quarter after two years of delays. But any further delays will stifle Rocket Lab's ability to convert its contract backlogs into revenue.

Image source: Rocket Lab.

Neutron is the future of Rocket Lab

Rocket Lab is currently depending on its existing Electron rockets for its launch business, and while they've been a successful piece of the company's growth, Rocket Lab can't reach its full potential without Neutron.

Neutron is a medium-lift rocket -- similar in size to Space Exploration Technologies' Falcon 9 -- that's reusable and capable of lifting to 28,000 lbs into lower earth orbit (LEO). An electron can only lift about 661 lbs.

Rocket Lab has made progress in its Neutron hot fires and stand tests, but Neutron's first launch is already two years behind schedule. And some of the company's latest contracts are specifically tied to Neutron.

For example, a recently announced $397 million contract with the U.S. Space Force states that Rocket Lab will use Neutron to deploy next-generation satellite technology called "flatellites" into LEO for the government agency. Rocket Lab's flatellites are stackable and flatter than traditional satellites, and will be used for the Space Force's Space-Based Airborne Moving Target Indicator (SB-AMTI) program.

To scale its business and achieve more efficiencies, the company needs to move beyond its Electron rockets and shift toward Neutron. SpaceX is doing the same -- although to a much larger scale -- with its Starship rocket. The larger the reusable rocket, the more payload and revenue these companies can earn from it.

Neutron may reach the launchpad in the 2026 launch, but will it launch?

Rocket Lab CEO Peter Beck said on the second-quarter earnings call that Neutron's target delivery to the launchpad is Q4 of this year. But he added that "the window for an end-of-year launch is narrowing" and that Rocket Lab is focused on balancing its first launch with scaling for future launches. And CFO Adam Spice said on the call that the first test launch would "hopefully" be later this year.

To me, it seems as if Rocket Lab management is very much leaving open the possibility that a launch may not happen this year.

Rocket Lab now has 90 launch missions in its backlog, both for Neutron and Electron rockets. For perspective, the company sold more launches in the first three months of 2026 than in all of 2025. And at least seven launches between now and 2029 are Neutron-specific for confidential commercial customers, excluding launches tied to the Space Force contract and other government defense launches.

This demand spurred Beck to say earlier this year: "Of all the things that I sit awake at night worrying about, Neutron demand is not one of them."

But with so much riding on a successful Neutron launch, investors should keep a close watch on how well the company executes on its current launch timeline. Further delays of Neutron's launch will mean Rocket Lab will have to wait longer to convert some of that impressive $2.4 billion backlog into sales.

Chris Neiger has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Rocket Lab. The Motley Fool has a disclosure policy.