CryptoSlate
Tether's abandoned Bitcoin mining venture in Uruguay cost roughly $120 million across two sites, according to a former contractor's estimate. The collapse unfolded through 2025 as Tether's local subsidiary Microfin and state utility UTE deadlocked over power allocation terms, with UTE disconnecting both sites on July 25 and Tether notifying labor authorities of mass layoffs by November. Microfin settled the outstanding debt in December.
Why it matters
The unwind is now directly relevant to Tether's next South American project, a memorandum of understanding with Adecoagro announced five months after Adecoagro representatives toured Tether's Uruguay facility. The Brazil pilot uses roughly 10 megawatts of surplus renewable energy that would otherwise be sold into the spot market, materially smaller than the 230 MW figure cited in the announcement, which actually refers to Adecoagro's broader renewable generation capacity, not power committed to Bitcoin mining.
The episode is a stress test of an assumption Tether leaned into publicly when launching in 2023, that Uruguay's renewable generation and grid reliability made it an ideal Bitcoin mining jurisdiction. That assumption held on generation. It collapsed on commercial terms.
Market impact
The $120M figure is an estimate of contractor spending, not a confirmed loss Tether has disclosed. It is large enough, though, that the Brazil project will be read as Tether's second attempt at the same thesis with the same renewable-energy angle but a much smaller commitment. The disclosures do not show Tether redesigned Brazil because of Uruguay, but they make Brazil the next test of whether the issuer's regional mining strategy can survive contact with local power markets.
The lesson for the wider sector: renewable-energy availability alone does not guarantee a workable mining operation. Clear power terms, dependable capacity and sustainable economics proved just as important in Uruguay, and will in Brazil.
Frequently asked questions
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How much did Tether spend on its Uruguay mining project?
A former contractor estimated total spending at roughly $120 million across two sites in Uruguay's Florida department, about $60 million at each. The figure is an estimate of spending, not a confirmed loss Tether has disclosed.
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Why did Tether's Uruguay mining venture collapse?
Tether's local subsidiary Microfin and state utility UTE deadlocked over electricity allocation terms. Microfin read its contract as a minimum that could be expanded, while UTE treated it as a maximum. The dispute was underway by late 2024.
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When did UTE disconnect Tether's Uruguay mining sites?
UTE disconnected both sites on July 25, 2025, after Microfin stopped paying power bills in May and notified UTE the following month that it planned to terminate the contracts without ever closing revised terms.
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What is Tether's Bitcoin mining project in Brazil?
Tether signed a memorandum of understanding with Adecoagro for a pilot using about 10 megawatts of surplus renewable energy that would otherwise be sold into the spot market. The 230 MW in the announcement refers to Adecoagro's broader renewable generation capacity, not power committed to mining.
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Did Tether redesign the Brazil project because of Uruguay?
The disclosures do not show that. They do, however, make Brazil the next test of whether Tether's regional mining strategy can survive contact with local power markets, after renewable availability alone proved insufficient in Uruguay.
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