Bitcoin mining companies shifting resources toward artificial intelligence and high-performance computing are encountering a more selective lending environment for data center projects. Securing large customer contracts addresses only part of the challenge. Operators must still raise substantial sums to acquire computing hardware, construct facilities and install the power capacity needed to meet performance obligations.

Lenders have grown more cautious about underwriting these builds. Approvals now hinge less on broad expectations of future demand and more on the specific customer, the strength of the contract and a credible route to operational readiness.

Divergent Rates Within a Single Company

IREN, which has moved from Bitcoin mining into AI infrastructure, provides a clear illustration of how financing terms can vary even for the same borrower. In June the company arranged a $3.65 billion GPU financing package tied to its Microsoft cloud contract at a blended interest rate of 6 percent. Two months later it closed a separate $2.4 billion arrangement at a fixed rate of 9 percent to support an air-cooled expansion at its Mackenzie site.

The two packages fund different projects and carry distinct risk profiles, so they cannot be read as a simple rise in the company’s overall cost of capital. Still, the three-percentage-point gap shows how project-specific details—equipment versus full facility development, construction contingencies and power readiness—shape the terms lenders are willing to offer.

Equipment financing that covers most GPU purchases does not automatically extend to buildings, electrical infrastructure or working capital. Companies therefore often need layered funding sources to bridge the full development cycle.

Structures Beyond Interest Rates

Some deals introduce costs that extend past coupon payments. In a September 2025 transaction, Google agreed to backstop $1.4 billion of lease obligations for Cipher Digital’s Barber Lake project. In return Google received warrants representing approximately 5.4 percent of Cipher’s equity on a pro forma basis, subject to adjustments. The arrangement also contemplated possible cash settlement under certain conditions.

If the warrants are exercised for shares, existing shareholders face dilution. Investors evaluating expansion economics therefore weigh not only interest expense but also equity components, required parent guarantees, restrictions on project cash flows and potential ownership dilution.

Cipher separately maintains a $200 million revolving credit facility maturing in March 2030, with an interest rate of the Secured Overnight Financing Rate plus 1.25 to 1.75 percentage points. The facility remained undrawn at closing and can be expanded by up to $50 million. Rate reductions are available based on the company’s total debt-to-market-capitalization ratio.

IREN also tapped the convertible-debt market in May, raising $3 billion through senior notes carrying a 1 percent coupon and maturing in 2033. Net proceeds after fees and expenses totaled about $2.96 billion. The company allocated $201.3 million to capped-call transactions designed to limit shareholder dilution if the notes convert, with an initial cap price of $110.30 per share.

Large Funding Gaps Persist

Capital needs remain substantial even as Bitcoin mining economics have weakened. A June 2026 analysis that drew on VanEck data estimated publicly traded Bitcoin miners require roughly $50 billion to complete planned AI infrastructure projects. Within that total, IREN faces a $21.1 billion funding gap, Riot Platforms $7.2 billion and HIVE Digital $4.6 billion.

At the peak of the previous Bitcoin bull market in October, miners’ debt had already risen roughly 500 percent from the second quarter of 2024. The demand for additional capital has not eased with softer crypto prices. Companies continue to layer debt and alternative structures to advance AI and high-performance computing campuses.

Spending Far Outpaces Current AI Revenue

Across nine publicly traded miners, capital expenditures reached $5.11 billion in the first half of 2026. Directly reported AI and high-performance computing revenue for the same period stood at $341.2 million. Some of the spending continued to support Bitcoin mining operations, so the full amount cannot be attributed solely to AI.

Second-quarter AI and high-performance computing revenue totaled $205.8 million, a 52 percent increase from the prior quarter. IREN added $2.8 billion in multi-year AI cloud contracts during the summer and raised its year-end annualized revenue target above $4 billion, with about 85 percent of that target already under contract. Advance customer payments covering roughly 45 percent of associated GPU capital spending reduced the amount the company needed to finance itself. As of June 30 its cash and cash equivalents, including restricted cash, stood at approximately $7.6 billion.

The gap between capital outlays and current revenue underscores the scale of the build-out still required before contracted performance can generate meaningful cash flow. Lenders continue to differentiate between projects that demonstrate clear customer commitments, power readiness and construction milestones and those that present greater execution uncertainty.