What Is Cloud Mining? How It Works and Why So Many Schemes Fail

Cloud mining means paying a company to point some of its mining machines at a cryptocurrency network on your behalf. You never touch the hardware: you buy a contract for a slice of hashpower, and the provider sends you a share of whatever that hashpower earns, minus its fees. The idea is real, but the sector has produced some of crypto’s largest frauds, so the risks deserve as much attention as the mechanics.

Mining in one paragraph

Bitcoin and a few other coins are secured by proof of work. Specialised computers race to find a number that, combined with a block of transactions, produces a hash below a target. Whoever finds it first adds the block and collects the reward: newly issued coins plus the fees paid by the transactions inside. On Bitcoin the issuance part has been 3.125 BTC per block since the halving at block 840,000 on 20 April 2024. The network retunes the difficulty every 2,016 blocks so that a block arrives roughly every ten minutes, however much computing power joins. A full explanation sits in our guide to what Bitcoin is.

Home mining stopped making sense for most people once ASICs (chips built only for hashing) took over. Machines are expensive, loud and hot, and electricity is the biggest running cost. Cloud mining sells a way around all of that.

How a cloud mining contract works

1. You pick a contract. It is usually priced per unit of hashrate (for Bitcoin, terahashes per second, TH/s) for a fixed term such as 12 or 24 months, or sometimes “until unprofitable”.
2. You pay up front. Most providers want card, bank or crypto payment before anything starts.
3. The provider mines. Its machines, usually pointed at a mining pool, produce a stream of rewards.
4. Payouts arrive. Your share is credited daily, typically in the mined coin, after maintenance and electricity charges are deducted.
5. The contract ends at the end of the term, or earlier if daily fees exceed daily revenue, depending on the small print.

Three common business models

The maths: why returns are hard to predict

Your gross revenue depends on four moving parts: your share of total network hashrate, the block subsidy, transaction fees and the coin’s price. Only one of them, your contracted hashrate, is fixed.

A simple way to picture it: if your contract equals one ten-millionth of all hashpower on the network, you can expect, on average, one ten-millionth of the rewards. Over a day with 144 Bitcoin blocks at 3.125 BTC each, issuance totals 450 BTC, so your expected share of the subsidy would be 0.000045 BTC plus a matching slice of fees. That figure shrinks every time the network adds machines.

A worked example (hypothetical numbers)

Suppose a two-year contract costs 600 units of your currency, the provider deducts a daily fee of 0.60, and the contract produces 1.00 of revenue per day in month one.

• Month one: net 0.40 per day, about 12 for the month.
• If network hashrate rises 3% a month and the coin price stays flat, revenue in month 12 is roughly 0.72 per day and net income has fallen to about 0.12.
• Around month 18 revenue drops below the 0.60 fee. A contract with an “unprofitable” clause stops there; one with fixed fees may start eating any balance you have left.
• Total net income over the life of the contract is well under 100, against the 600 you paid.

Change the assumptions and the outcome changes. A strong price rise could make the same contract profitable; a halving during the term cuts subsidy revenue in half overnight. The next Bitcoin halving is due at block 1,050,000, expected around 2028. The point of the exercise is that the buyer carries every one of these risks, while the seller already has your money.

Costs that are easy to miss

• Maintenance and electricity fees, often quoted per TH/s per day, deducted before you see anything.
• Pool fees, usually a small percentage of rewards.
• Withdrawal minimums that trap small balances.
• Contract terms letting the provider end or “pause” mining when it is unprofitable for them.
• Taxes: in many countries mining income is taxable when received, at its value on that day.

What the court cases show

Cloud mining has a long record of companies that sold hashpower they did not have and paid early customers with later customers’ money. The pattern matters because it recurs.

GAW Miners and “Hashlets” (2014-2015)

The SEC sued GAW Miners, ZenMiner and founder Homero Joshua Garza in December 2015, saying they sold more mining capacity than they owned through products called Hashlets. Garza later pleaded guilty to wire fraud and on 13 September 2018 was sentenced to 21 months in prison.

BitClub Network (2014-2019)

US prosecutors in New Jersey charged the people behind BitClub Network in December 2019, describing a scheme worth at least $722 million that sold shares in mining pools and rewarded recruitment of new investors. One defendant admitted he never knew of the three separate pools investors were told they could buy into.

Mining Capital Coin (2018-2022)

On 6 May 2022 the SEC announced fraud charges against Mining Capital Coin and its founders. According to the complaint, its “mining packages” were sold to 65,535 investors with promised returns of 1% a day, and investors were later pushed to withdraw in the company’s own token instead of bitcoin.

HashFlare (2015-2019)

HashFlare sold mining contracts worth more than $577 million, according to US prosecutors, while customer dashboards showed mining output that did not match reality. Its Estonian founders were arrested in 2022, extradited to the United States in 2024 and sentenced in Seattle on 12 August 2025 to time served, a fine and community service; prosecutors had asked for ten years and have appealed.

Red flags before you pay anyone

• Fixed or guaranteed daily returns. Real mining income moves with difficulty and price every day. A promise of 1% a day is a Ponzi tell, not a mining yield.
• Referral bonuses and ranks. When pay depends on recruiting others, the product is the recruitment.
• No verifiable fleet. A legitimate operator can name its data centres, show hardware and point to pool or on-chain payout addresses.
• Withdrawals in a house token. If you mined bitcoin, you should be paid in bitcoin.
• Pressure and “limited slots”. Urgency is a sales tactic.
• Payment only in crypto, no company details. Crypto payments are generally irreversible, as the US Federal Trade Commission points out, so there is no card chargeback if it goes wrong.

Checks that actually help

1. Search the company name on your national regulator’s warning list and in court records.
2. Find the legal entity, its registered address and the jurisdiction whose courts would hear a dispute.
3. Ask which pool the hashpower is pointed at, then confirm payouts on chain.
4. Run the contract through your own spreadsheet with rising difficulty and a falling price, not just the seller’s calculator.
5. Start, if at all, with an amount you can lose completely.

Alternatives to cloud mining

If the goal is simply to own some bitcoin, buying it directly from a registered platform and moving it to a wallet you control is cheaper and easier to verify; see how and where to buy bitcoin. People interested in mining itself can run a full node or a small home miner to learn how the network works without expecting profit. For other proof-of-work coins, such as Litecoin, the same economics apply. Unfamiliar words on this page, such as hashrate or pool, are defined in the Blocktionary.