Public Bitcoin miners have spent the past few years making a bet: the power they secured for mining could be worth more if it ran artificial intelligence workloads instead. Now the bill for that idea is coming into focus.
The sector needs approximately $50 billion in near-term capital to complete its planned AI and high-performance computing (HPC) infrastructure, according to data from Blocksbridge Consulting and reports from VanEck.
Who needs the money
The shortfall is far from evenly spread. A handful of companies account for most of it, and one name stands well above the rest.
IREN is expected to face the largest gap of any public miner, at about $21.1 billion.
Riot Platforms follows with a projected shortfall of $7.2 billion. HIVE Digital rounds out the top three with an estimated gap of $4.6 billion.
IREN’s number looks large partly because its ambitions are large. The company has secured a $9.7 billion contract with Microsoft spanning five years. It is also guiding capital expenditures of $25-30 billion for fiscal year 2027.
Why miners are making this move at all
The pivot traces back to the economics of Bitcoin mining after the 2024 halving. Halvings cut the reward miners receive for each new block, which squeezes margins for any operator that does not find cheaper power or more efficient machines.
The catch is that a Bitcoin mine and an AI data center are not the same building with a new sign out front. AI-grade facilities typically demand different cooling, networking, redundancy and hardware. Converting a site means spending heavily before the new revenue arrives.
The execution problem
Raising capital is one challenge. Delivering on promises is another, and the early track record is mixed.
Only around 25% of the AI and HPC capacity that miners have leased out has actually been delivered so far. Three quarters of the contracted capacity still exists mostly on paper and in construction schedules.
That ratio matters because leases are only as valuable as the megawatts behind them. A customer that signs for capacity expects it online on time. Delays push back revenue while costs, including financing costs, keep accruing.
What this means for investors and the industry
The most immediate implication is that miners will probably need to look well beyond their traditional funding sources. The scale of the gap suggests capital from conventional finance, infrastructure investors and possibly the AI customers themselves, rather than the crypto-native backers that funded earlier mining expansions.
Contracts like IREN’s Microsoft deal offer multiyear visibility that Bitcoin mining revenue, tied to a volatile asset and a shrinking block subsidy, has never provided.
The risks run in the other direction too. Raising tens of billions usually means some combination of heavy debt, significant share issuance, or project-level partnerships that give away part of the upside.
The things to watch are fairly concrete. First, how and at what cost IREN, Riot and HIVE close their funding gaps, whether through debt, equity or partnerships. Second, whether the share of delivered capacity climbs meaningfully from around 25%. Third, whether more multibillion-dollar hosting contracts emerge to justify the spending.
Disclosure: This article was edited by John Chen. For more information on how we create and review content, see our Editorial Policy.