Iran Suspended Cryptocurrency Mining as Power Cuts Deepened

Iran ordered cryptocurrency miners to stop operating on May 26, 2021, including businesses holding government licenses, as widespread electricity outages placed the country’s power policy under pressure.

President Hassan Rouhani announced the suspension during a televised cabinet meeting. Contemporaneous reports said it took effect immediately and would continue through September 22. The development mattered beyond Iran because it demonstrated how quickly access to electricity could become a binding constraint on proof-of-work mining—even where operators had entered a government licensing system.

The measure was a mining suspension, not a prohibition on Bitcoin’s network, cryptocurrency ownership everywhere, or every digital-asset transaction. Iran could disconnect identifiable facilities within its jurisdiction, but it could not switch off a decentralized network operating across many countries.

Licensed miners lost their operating distinction

Iran’s cabinet had recognized cryptocurrency mining as an industrial activity in 2019, subject to licensing, special electricity pricing and restrictions on the use of ordinary subsidized power connections. That framework created a formal category of authorized mining businesses alongside a much larger, harder-to-measure unlicensed sector.

Rouhani’s May 26 direction temporarily erased the practical distinction between the two groups: neither licensed nor unlicensed mining was supposed to continue through September 22. Ministries responsible for energy, communications and intelligence were directed to act against the activity, according to reports preserving the cabinet remarks.

Rouhani said licensed miners consumed approximately 300 megawatts while unlicensed operations consumed approximately 2,000 megawatts. Those were government estimates presented during the cabinet meeting, not independently audited meter totals. The surviving reports did not explain how authorities estimated electricity use by operators that, by definition, were outside the licensing system.

That uncertainty was operationally important. Registered facilities could be identified and disconnected through administrative controls. Enforcement against machines hidden in homes, factories or other premises required detection, inspection and continuing compliance. An order covering all miners therefore did not establish that all mining stopped on May 26 or that the claimed 2,300 megawatts became available to the grid.

Why Iran mattered to Bitcoin mining

Elliptic estimated shortly before the suspension that Iran accounted for approximately 4.5% of global Bitcoin mining. The analytics company explicitly described exact measurement as difficult. Its estimate combined Cambridge Centre mining-pool data collected through April 2020 with a January 2021 statement from Iran’s state-controlled power company that miners were consuming as much as 600 megawatts.

The 4.5% figure was consequently a modeled estimate, not a live May 26 census. It also referred specifically to Bitcoin mining, while Rouhani’s order used the broader category of cryptocurrency mining. The government’s electricity figures and Elliptic’s Bitcoin estimate measured different things and should not be treated as directly interchangeable.

Even if Iranian Bitcoin miners disconnected, the immediate network effect could not be calculated from the announcement alone. Unlicensed operators might ignore the order, facilities could already be offline, and mining equipment could later be moved. Bitcoin’s global hashrate is itself inferred from block production and can fluctuate for reasons unrelated to one country.

What was knowable on May 26

The verified development was an institutional response to a domestic electricity emergency. Iran had placed household and grid needs ahead of an industry it had previously licensed, showing miners that regulatory permission did not guarantee continuous access to power.

The event-day record did not establish how many facilities complied, how much electricity was actually saved, or whether the announcement caused a measurable change in Bitcoin’s price or global hashrate. No exchange-specific price window or facility-level computing data reviewed for this reconstruction could support such a causal market claim.

The defensible May 26 conclusion was therefore narrower: Iran imposed a temporary nationwide mining suspension through September 22, but the order’s enforcement and network consequences remained uncertain.