IREN remains predominantly a Bitcoin miner by revenue, even as it retires mining hardware to free up space for AI infrastructure and expand its AI Cloud business.

According to the company's fiscal 2026 results, filed Aug. 27, Bitcoin mining generated $578.2 million of IREN's $707 million in annual revenue — roughly 81.8%. AI Cloud Services contributed $128.8 million.

The split illustrates a tension running through the crypto-mining sector: publicly traded miners hold powered data center capacity and grid connections that AI cloud customers want, but converting that capacity means shutting down a working revenue stream — Bitcoin mining — before the replacement AI contracts deliver GAAP revenue. IREN's results are a concrete accounting snapshot of that trade-off.

The ongoing transition produced a $638.8 million non-cash impairment, primarily tied to decommissioning miners as data center sites were converted for AI workloads. IREN also reported a $702.6 million net loss, which was affected by the impairment and other items. The charge did not represent a $638.8 million cash outflow; rather, it assigned an accounting value to assets retired before the replacement business had fully entered service.

As of Aug. 26, IREN had $1 billion in operating annualized run-rate revenue (ARR), compared with $4 billion in contracted ARR for its 2026 capacity. The company targets having the larger run rate operational by Dec. 31.

IREN calculates ARR from contracted GPU pricing multiplied by a full year of hours, including storage and related services. It is an operating measure rather than GAAP revenue, and IREN cautions that recognized revenue may be materially lower. Closing the gap depends on physical infrastructure being delivered and accepted, as well as the company's utilization and pricing assumptions.

IREN's Form 10-K states that revenue generally begins only after data centers are built and energized, equipment is installed and commissioned, performance testing is complete, and customers accept the capacity. Delays can postpone revenue recognition while financing and operating costs continue, and can trigger delay or service credits.

As of June 30, IREN still had installed Bitcoin mining capacity of approximately 23.2 EH/s across roughly 380MW. The company aims to substantially complete the transition of that data center capacity toward AI Cloud Services by year-end.

Delay also carries a financing cost. IREN raised GPU financing to support the Microsoft contract through a delayed-draw loan priced at one-month SOFR plus 2.25%, along with senior notes at 5.96%, with tranches subject to conditions. A separate Mackenzie financing of up to $2.4 billion carries a 9% fixed rate and matures 30 months after each relevant staged funding date.

IREN holds contracts that could replace the mining business on a run-rate basis. The filing does not show that replacement as completed. The next proof point is customer acceptance of the remaining deployments and the GAAP AI revenue they begin to produce — the milestone that would show whether the pivot has actually replaced the mining income it is displacing.

Source: CryptoSlate