IREN Remains Primarily a Bitcoin Miner, With 82% of FY2026 Revenue Still From BTC as AI Cloud Expansion Advances

Even as it phases out mining equipment to accommodate AI infrastructure, IREN remains predominantly a Bitcoin mining operation in terms of revenue.

According to IREN’s fiscal year 2026 results filed on August 27, Bitcoin mining accounted for $578.2 million of the company’s total $707 million revenue—an estimated 81.8 %. AI cloud services contributed $128.8 million.

The shift has generated a $638.8 million non‑cash impairment, principally linked to the decommissioning of mining rigs as data‑center sites were repurposed for AI workloads. The impairment contributed to a $702.6 million net loss for the period, which also reflected other charges. The impairment does not represent a cash outflow but reflects the write‑down of assets retired before the new AI business achieved full service.

IREN AI cloud revenue faces a $3 billion operating gap

As of August 26, IREN reported an operating annualized run‑rate revenue (ARR) of $1 billion, compared with $4 billion of contracted ARR for its 2026 capacity. The company expects the higher run‑rate to become operational by December 31.

IREN defines ARR as contracted GPU pricing multiplied by a full year of usage, inclusive of storage and ancillary services. This metric is non‑GAAP and, according to the firm, recognized revenue could be materially lower. Achieving the targeted run‑rate depends on the delivery and acceptance of physical infrastructure, as well as on utilization rates and pricing assumptions.

The Form 10‑K filing stipulates that revenue recognition typically begins only after data centers are constructed, powered, and equipped; equipment is installed and commissioned; performance testing is completed; and customers accept the capacity. Any delays extend the revenue‑recognition timeline while financing and operating costs continue, potentially resulting in service credits or penalties.

The deployment schedule is staged. Microsoft accepted Horizon 1 in August, with Horizons 2 through 4 planned for phased delivery during Q4 2026 and contractual grace periods extending into early Q2 2027.

As of June 30, IREN still maintained Bitcoin mining capacity of roughly 23.2 EH/s across about 380 MW. The company intends to complete the transition of this capacity to AI cloud services by the end of the year.

Financing the AI expansion entails additional costs. IREN secured GPU financing through a delayed‑draw loan indexed to one‑month SOFR plus 2.25 % and senior notes at 5.96 %, with tranches conditional on certain milestones. A separate Mackenzie financing arrangement of up to $2.4 billion carries a 9 % fixed rate and matures 30 months after each staged funding date.

Microsoft and NVIDIA together constitute the bulk of IREN’s contracted revenue, the company noted. While new customers are being added, acceptance, performance, and counterparty risks remain concentrated among these key partners.

IREN’s contracts have the potential to replace its mining revenue on a run‑rate basis, but the transition has not yet been reflected in GAAP results. The next validation will come from customer acceptance of the remaining AI deployments and the GAAP‑compliant AI revenue they generate.

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