Nebius tests the neocloud playbook with $40 billion in planned spending

Nebius laid out $40 to $45 billion in planned 2027 capital spending on Thursday, far more than Wall Street expected. It plans to pay for most of it with customer prepayments and loans backed by customer contracts. Put simply, the future value of the data centers is financing their construction.

The weak spot is timing. Nebius's contract with Microsoft is worth up to $19.4 billion, and the Vineland, New Jersey, site serving it is months behind. Only a little over half of that Microsoft capacity is now slated for delivery by year-end, with the rest pushed to Q2 2027. Nebius cut its 2026 revenue forecast by $200 million to $3 billion, and the stock closed down 17%.

We think the neocloud model is a real contribution to the AI buildout. Firms like Nebius add capacity faster than the hyperscalers could alone, and prepayment financing is a clever way to grow without wrecking the balance sheet. When customers pay up front for compute, that's a strong demand signal, not a bubble tell.

But that financing only works when buildings arrive on schedule. If capacity is late, costs keep running while revenue slips, and the Microsoft contract allows termination after a grace period if dates are missed and no alternative capacity is offered. It also includes penalties for late delivery. Nebius says Microsoft has been part of the planning process. It didn't say Microsoft agreed to the new dates. That gap matters.

The New Jersey story also reaches beyond finance. The third-party operator, DataOne, ran at least 45 natural gas generators without permits, according to an investigation by Floodlight, and state regulators fined the facility $1.1 million. Residents are suing over a constant hum. Nebius blames the delay on the operator winding down temporary generation faster than expected while it switches to Bloom Energy fuel cells. Our read is that the community pushback and the schedule slip are the same story. Cut corners on power and permits and the delay just shows up later.

The bigger signal is Microsoft. Bloomberg reports it is tightening oversight on third-party builders, including Nebius, IREN and Nscale, and debating whether new deals are worth it. Microsoft also said third-party delays pushed its own capex below plan. If the biggest buyer of neocloud capacity starts demanding proof before paying, the prepayment engine slows for everyone.

To be fair, Nebius says the sites it builds itself are on time or early, that those will supply most new capacity from 2027, and that Q3 deals came with prepayments covering the build cost. It has $7.4 billion in cash and expects pre-tax breakeven by Q4 2027. I'm not betting against it. But a plan where up to 85% of spending rests on customer money is only as solid as the next delivery date.

Nebius posted third-quarter revenue of $981 million, up 571% from a year earlier, though roughly a third of that was a one-time payment tied to a new partnership model. It forecast 2027 revenue of $12 to $13 billion. Its finance chief named the Microsoft and Meta contracts as ones that can be financed with asset-backed debt.