SpaceX told investors its capital spending could nearly double this quarter, with the company guiding for $35 billion to $40 billion as fresh compute capacity comes online. The forecast overshadowed a third-quarter report that was otherwise in line with expectations, sending shares up 4 percent in after-hours trading.

The spending trajectory

Total capital expenditures reached $19.6 billion in the third quarter, matching analyst estimates. Of that, $16.4 billion was directed toward AI infrastructure, slightly below the $16.9 billion the Street had modeled. The new guidance implies a sequential jump of roughly 80 to 100 percent, a pace that would dwarf the quarterly increases seen throughout 2026.

Payback math

CFO Bret Johnsen said the newly deployed compute is generating a payback period of under one year at current pricing. That claim is the financial rationale for the acceleration: if the hardware earns back its cost in less than twelve months, the spending looks less like a speculative bet and more like a working-capital cycle.

Revenue crossover

The AI segment, now branded SpaceXSI, produced $7.6 billion of revenue in the quarter, surpassing the $6.3 billion consensus and overtaking Starlink’s $5.2 billion for the first time. Leasing arrangements with Anthropic, Google and Reflection AI contributed $1.6 billion, and Musk said inbound demand from hyperscalers and smaller firms is intense enough to rent the same capacity several times over. He described the internal-versus-external split as a rough 50/50 target that could drift to 60/40 either way month to month.

The constraint shift

Musk argued that chips are no longer the primary bottleneck for superintelligence deployment. Power, cooling and physical infrastructure have taken over as the limiting factors, a framing that conveniently aligns with a company whose core competency is building and operating massive engineered systems in harsh environments.

What to watch

The next quarter will test whether the payback claim holds as the $35 billion to $40 billion in fresh spend hits the income statement. Investors will also monitor the lease mix: a sustained tilt toward external tenants would turn SpaceX into a merchant compute landlord, while a tilt inward would signal that its own models are consuming the marginal capacity. Either way, the capex trajectory has moved from steady climb to vertical step.