Bitcoin miners' AI capex hits $30.7B, outpacing revenue 15-to-1

Bitcoin miners and AI peers spent $30.7 billion on capital assets in H1 2026, generating just $341 million in AI revenue — a 15-to-1 gap.

"The filings already show that AI revenue is growing," according to BlocksBridge Consulting's analysis published by TheEnergyMag. "The question is whether that revenue can begin catching up with the unprecedented amount of cash already committed to produce it."

A dozen public mining companies tracked by TheEnergyMag recorded $6.87 billion of net cash spending on capital assets in the first half of 2026, compared with $6.50 billion for all of 2025. Adding Applied Digital, CoreWeave and Nebius, the 15-company cohort spent $30.7 billion, up 42.6 percent from $21.53 billion in 2025. CoreWeave alone paid $14.12 billion for property and equipment in the six months ended June 30, exceeding its $10.31 billion expenditure for all of 2025. Nebius spent $8.13 billion, roughly double its prior-year figure.

The gap captures the central risk of the transition: expenditure is immediate and largely irreversible, while revenue conversion depends on construction schedules, grid connections, customer acceptance and sustained demand. For the rest of 2026, the key question is whether AI revenue can begin catching up with the unprecedented amount of cash already committed to produce it.

Revenue accelerates from a smaller base

Across nine miners present in both quarters of the supplied revenue schedule, directly reported HPC, AI cloud and colocation revenue increased 52 percent to $205.8 million in Q2 from $135.4 million in Q1. Including estimates for MARA and Hut 8, the comparable totals were $215.8 million and $140.3 million.

Core Scientific supplied most of the absolute increase. Its colocation revenue rose to $136.7 million from $77.5 million. TeraWulf's HPC leasing revenue increased to $31.9 million from $21 million, while Bitdeer's AI Cloud revenue climbed to $14 million from $3.7 million.

The acceleration nevertheless remains small beside the construction bill. Those nine comparable miners generated $341.2 million of directly reported HPC and AI revenue during the first half while spending $5.11 billion on capital assets — about 15 times the revenue.

The same pattern is visible at the AI-native companies, although their revenue bases are considerably larger. CoreWeave's revenue increased 24 percent to $2.58 billion in Q2 from $2.08 billion in Q1. Its $4.65 billion of first-half revenue was equivalent to about one-third of its $14.12 billion of cash capital spending. Nebius recorded $582.3 million of Q2 revenue, up 46 percent from $399 million in Q1. First-half revenue reached $981.3 million, compared with $8.13 billion of net capital spending.

Long-term contracts carry reversion risk

The capex surge follows a wave of multi-billion-dollar AI contracts signed by former bitcoin miners. Core Scientific has committed up to 2.5 GW of available computing capacity to AMD and CoreWeave, with total potential revenue exceeding $24 billion over the contract period. Hut 8 has secured 949 MW of contracted computing power with a contract base value of $26.6 billion. TeraWulf signed a 20-year lease agreement worth approximately $19 billion. IREN delivered its first AI cloud deployment nodes to Microsoft under a five-year contract worth $9.7 billion.

HIVE Digital Technologies this week signed a five-year, $350 million GPU cloud services agreement through its BUZZ High Performance Computing subsidiary, adding roughly $70 million in annualized revenue and bringing BUZZ HPC's total annualized revenue to about $180 million. The deployment of 2,016 NVIDIA Blackwell Ultra GPUs at the Bell AI Fabric facility in British Columbia is expected to generate approximately $500,000 in daily revenue once operational in Q4.

The contracts have ignited market enthusiasm, but the risk-to-reward profile of long-term AI contracts remains uncertain. Bitcoin's network difficulty has dropped from its 2025 peak of approximately 156 trillion to 127.5 trillion as miners exit, creating a self-repairing mechanism for remaining miners. The AI computing industry lacks this automatic adjustment — if a large number of participants enter, oversupply could push prices lower.

Marathon Digital and Hut 8 have taken a more cautious approach, maintaining mining operations and Bitcoin holdings while funding AI expansion. MARA secured $150 million through a 2026 credit facility using its remaining Bitcoin as collateral, while still holding over 35,000 Bitcoin on its balance sheet as of June 30.

This article is for informational purposes only and does not constitute investment advice.