Is Cloud Mining Legit? How to Spot a Scam Before You Pay

Some cloud mining contracts are real, but most are poor value and many are scams. One number, hashprice, tells you which is which in under a minute.

By Michal Beno, CEO, OneMiners14 October 2026

Specialised computers called Bitcoin miners secure the Bitcoin network by running a guessing process around the clock, and the network pays newly issued bitcoin to whoever finds the next valid block. Hashrate, measured in TH/s (terahashes, or trillions of guesses, per second), is how much of that work a machine does.

Cloud mining sells you a contract for a slice of hashrate, usually for a fixed term, inside hardware you never see. You own a promise, not hardware. That simplicity is exactly why the model attracts fraud: a promise is cheap to sell and hard to check.

Hosting works differently. You buy a real Bitcoin miner with its own serial number, and a professional facility plugs it in, powers it, cools it and maintains it for a fee per kWh of electricity it uses. The hardware is yours, and you can move it. That ownership is why regulators treat many cloud contracts as investments while hosting is a service.

Every honest mining return starts from hashprice: the revenue one unit of hashrate earns per day. It is usually quoted per TH/s or per PH/s (1 PH/s is 1,000 TH/s). With Bitcoin at about $85,739 and the whole network running about 970 EH/s (970 million TH/s), hashprice is about $0.040 per TH/s per day, or about $40 per PH/s per day, before electricity.

Apart from a small top-up from transaction fees, nobody earns more per TH/s than this, however large. The reward for each block is fixed by the protocol and shared by all the hashrate on the network, so a bigger operator gets more in total, never more per unit. That makes hashprice a hard ceiling you can use against any offer.

Now test a typical scam offer: 3% a day on a $1,000 deposit. That is $30 a day. At today's hashprice, paying $30 a day needs about 754 TH/s of real hashrate, roughly three Antminer S21 Pro units that sell for $2,299 each, running with free electricity. No real business hands you about $6,900 worth of output for $1,000.

Even the best hardware on sale earns well under 1% of its own price per day before power. An S21 Pro brings in about $9.75 a day, or about 0.42% of its price. At a hosting rate of $0.048 per kWh its electricity costs about $4.23 a day, leaving about $5.52. Scale that to $1,000 of hardware and you get the honest comparison below.

Any fixed return far above that line is paid from new deposits, not mining: early customers are paid with later customers' money until new money slows, and then withdrawals stop.

Hashprice also moves. CoinShares reported it fell to a record low of about $28 to $30 per PH/s per day in the first quarter of 2026, then recovered to about $40 today. A real mining payout would have fallen with it. A contract that paid the same fixed amount through that slump was, by definition, not passing on mining income.

In April 2019 the SEC and the CFTC, the two main U.S. market regulators, jointly warned that fraudsters pitch crypto mining farms promising high, fixed returns with little or no risk. It also lists pressure to buy now, unsolicited pitches and jargon-heavy documents. A stranger's message on social media promising mining profits is the most common start.

HashFlare (2015 to 2025). HashFlare sold more than $577 million of cloud mining contracts between 2015 and 2019. U.S. prosecutors said it had less than 1% of the computing power it claimed, while its dashboards showed invented profits. Founders Sergei Potapenko and Ivan Turogin were arrested in Estonia in November 2022, extradited to the U.S. in May 2024 and pleaded guilty to conspiracy to commit wire fraud. On 12 August 2025 a federal judge in Seattle sentenced them to time served (prosecutors had sought 10 years), and the U.S. government appealed. They also forfeited more than $400 million in assets under their plea deal.

GAW Miners and ZenMiner (2014 to 2017). The SEC said GAW Miners sold about $20 million of virtual mining contracts called Hashlets to more than 10,000 investors in 2014, while most of the computing power never existed. The SEC won default judgments in 2017 for about $10.4 million plus penalties, and founder Josh Garza pleaded guilty to wire fraud.

Ultra Mining (2020). On 8 April 2020 the Texas State Securities Board and the Alabama Securities Commission ordered Ultra Mining to stop, alleging it promised about 105% a year on rented hashrate, with affiliate programmes and unproven charity claims. Regulators said it had raised about $18 million. That is roughly 0.29% a day, promised as a steady figure although real mining revenue moves every day.

Yes, some contracts are real: the provider owns hardware and passes on a share of actual mining revenue. The problem is value. The provider takes a margin on hardware, electricity and the contract, and many contracts add a daily maintenance fee that can eat the whole payout when hashprice falls. You carry all of the downside, and at the end of the term you own nothing.

A fair cloud contract is possible but usually poor value, and an unfair one looks identical from the outside. Owning real Bitcoin miners in a professional facility gives you the hardware, the serial number and the right to move it. Here is what a hosted miner looks like on paper.

Antminer S21 Pro 245T$2,299Hashrate245 TH/sEfficiency15.00 J/THPower draw3,675 WBreak-even power$0.111/kWhNet/day at 4.80c$5.52View on OneMiners

Whatsminer M66S 298T$1,969Hashrate298 TH/sEfficiency18.50 J/THPower draw5,513 WBreak-even power$0.090/kWhNet/day at 4.80c$5.51View on OneMiners

Antminer S21 200T$907Hashrate200 TH/sEfficiency17.60 J/THPower draw3,520 WBreak-even power$0.094/kWhNet/day at 4.80c$3.90View on OneMiners

Live OneMiners store prices, 6 October 2026. Daily figures are at today's numbers and change with Bitcoin's price and network difficulty. No return is promised.

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Michal Beno

CEO of OneMiners, the global Bitcoin mining hosting and hardware platform with 15 published hosting locations, 7-year fixed electricity contracts and a 7-year hardware warranty. He writes about the economics of industrial Bitcoin mining.

Informational only, not financial advice. Figures are a snapshot from public market data and news reports as of 5 October 2026 and can change quickly. Crypto prices can fall as well as rise. No return is offered or implied. Do your own research.