Nebius plans $40 billion spending dependent on customer prepayments as Microsoft delays loom

Nebius is wagering $40 billion on a neocloud expansion that depends heavily on customer prepayments and third-party operators who are already missing deadlines. For allocators and balance-sheet watchers, the company’s ability to execute at scale now directly affects the financial sustainability of AI infrastructure financing.

• Nebius plans $40 billion in capital spending for 2027, far exceeding Wall Street expectations and relying on customer prepayments and asset-backed financing to cover 85% of costs.
• The company’s largest customer, Microsoft, has a contract worth up to $19.4 billion but faces months of delays at a New Jersey data center operated by third-party DataOne.
• Microsoft’s public cooling on neocloud projects and internal tightening of oversight exposes Nebius’s core vulnerability: revenue models built on prepayments collapse if delivery windows slip beyond contractual grace periods.

• $40B Nebius’s planned 2027 capex, substantially above prior Wall Street consensus
• $19.4B Maximum contract value with Microsoft for GPU infrastructure in New Jersey
• 571% Third-quarter revenue growth year-over-year to $981 million
• 85% Percentage of 2027 capex expected to be covered by prepayments and asset-backed financing

Nebius announced Thursday (November 12) on its third-quarter earnings call that it will spend $40 billion next year on data center construction, a figure substantially exceeding analyst expectations and putting significant pressure on the neocloud company’s financing model. According to TechCrunch, the spending plan rests almost entirely on prepayments from customers and loans secured by customer contracts, a strategy that works only if projects stay on schedule and customers honor their commitments despite delays.

Microsoft’s New Jersey delays reveal the financing trap

The most immediate threat to Nebius’s plan is the Vineland, New Jersey data center, where DataOne operates GPU infrastructure that Microsoft has contracted to use. According to the SEC filing, Microsoft’s agreement with Nebius specifies deployment tranches originally meant for 2025 and 2026, with a total contract value of up to $19.4 billion. Only just over half of that capacity will now arrive by the end of this year, with the remainder pushed to the second quarter of 2027.

The delay stems from DataOne’s decision to accelerate the shutdown of temporary natural gas generators faster than planned as it transitions to permanent Bloom Energy fuel cells. But the transition was not entirely voluntary. In August, investigative outlet Floodlight identified at least 45 gas generators operating without permits at the site, and New Jersey regulators subsequently fined DataOne $1.1 million for violations of federal law. DataOne also faces a noise-complaint lawsuit from local residents over humming emissions from the facility.

The Microsoft contract permits termination of service after a grace period if Nebius misses agreed delivery dates and cannot provide alternative capacity, and includes liquidated damages for late delivery.

Microsoft’s pullback signals broader risk to the prepayment model

Nebius’s vulnerability deepens because Microsoft has begun cooling on neocloud deals more broadly. Bloomberg reported last week that Microsoft is tightening oversight on third-party infrastructure projects, including those from Nebius, IREN, and Nscale, and questioning whether new agreements are worth signing. Microsoft has already declined to exercise an option to more than double its commitment to Nscale’s Texas data center and stopped being an anchor customer for Nscale’s Essex site after power delays.

Chief Revenue Officer Marc Boroditsky told the earnings call that Microsoft and Meta prepaid substantially for their deals, money that arrived well before delivery. But if Microsoft can terminate tranches that miss deadlines by too much, Nebius faces a cascade of risks: it will have collected cash for capacity it cannot deliver on time, spent money on construction that generates no revenue until completion, and lost a customer whose contract subsidizes the entire financing model.

Nebius cut its 2026 revenue forecast by $200 million to $3 billion, citing delays at third-party sites including the New Jersey facility, and shares fell 17% on the announcement.

Nebius’s own capacity and alternative financing paths

Nebius contends that delays are concentrated at sites it does not control. According to the earnings call, data centers that Nebius itself operates are coming online on time or ahead of schedule and will supply most of the new capacity from 2027 onward. The company ended the third quarter with $7.4 billion in cash and forecasted total prepayments plus asset-backed financing to cover up to 85 percent of the $40 to $45 billion expected 2027 capex spend.

Boroditsky said Nebius could “tap prepayments to shore up any additional cash requirements” if needed. The company also reported third-quarter revenue of $981 million, up 571 percent year-over-year, though roughly one-third of that figure was a one-time payment tied to a new partnership model. Nebius forecast full-year 2027 revenue of $12 to $13 billion and expects to break even on a pre-tax basis by the fourth quarter of 2027.

CEO Arkady Volozh acknowledged the execution risk during Thursday’s call: “Building at this scale is hard, and delays are part of our industry right now. We are not immune.”

Building at this scale is hard, and delays are part of our industry right now. We are not immune.

Arkady Volozh, Nebius CEO

The BlockWest read. Nebius’s $40 billion spend bet is structurally sound only if Microsoft treats the New Jersey delays as temporary and does not invoke its termination rights. The filing shows Microsoft can walk away after a grace period if capacity misses deployment dates by too much. Whether Microsoft exercises that option will determine whether Nebius’s prepayment-funded model looks prescient or reckless by mid-2027.

Nebius will deliver the clearest test of its model in Q2 2027 when the remaining Microsoft capacity is due. If the New Jersey site meets that deadline and Microsoft continues funding without invoking termination rights, the prepayment-backed financing model holds; if either event fails, cascading contract defaults and customer pullback become the dominant risk for the entire neocloud sector.

BlockWest is a news publication. Nothing here is investment advice. Read our disclaimer and editorial policy.