Is Bitcoin mining worth it in 2026? How to buy a miner (and avoid scams)

What decides whether bitcoin mining is worth it?

Quick answer: five numbers.

• Hashprice: what one petahash per second of computing power earns per day, in dollars: $39.87 on 28 September 2026, with bitcoin at $83,479 and difficulty at 132.76 T (Hashrate Index).
• Efficiency: joules per terahash (J/TH), lower is better (Cambridge). Our example: an Antminer S21 XP, 270 TH/s, 3,645 W, 13.5 J/TH, 75 dB, about $6,000 (Kryptex, which doesn't name the seller).
• Price of power: the number that decides.
• Difficulty: it adjusts itself to the computing power on the network (whitepaper): more machines, less revenue for each.
• The halving: at block 1,050,000 the reward falls from 3.125 to 1.5625 bitcoin, estimated around 13 April 2028 (CoinWarz, date varies). With price and difficulty unchanged, revenue per TH/s roughly halves: transaction fees are only 0.70% of block rewards (Hashrate Index).

How much does a miner earn? A worked example

Quick answer: at US household prices it loses money; it earns only on cheap power, and the halving changes the maths.

Assumptions: S21 XP running 24/7, hashprice $39.87, pool fees and taxes ignored. Gross revenue: 270 TH/s × $39.87 per PH/s = about $10.77 a day. Consumption: 87.5 kWh a day. Break-even power price: $0.123 per kWh, falling to about $0.062 after the halving. For reference, the US average residential price was 18.31 cents per kWh in July 2026 (EIA, preliminary).

At Blockware's $0.07 all-in hosting rate the gross margin is about $4.64 a day, roughly 3.5 years to recover $6,000. With a 15% fee like Sazmining's, and power at the same rate (our assumption), about $3.03 a day and 5.4 years. After the halving, with everything else equal, both lose money. These are examples, not forecasts. If the heat replaces electric resistance heating the picture changes: see Bitcoin heater: does a mining space heater really work?.

Mine at home or use hosting?

Quick answer: at home you deal with noise, heat and your electrical service; with hosting the machine lives elsewhere and you rely on a provider.

At home, 75 dB is loud and 3,645 W is a lot of appliances at once. With hosting, a provider houses, powers and monitors the machine. Two examples, with what their own pages say (not recommendations):

• Sazmining (page read on 14 October 2026): you buy the machine and own it; 15% of the bitcoin mined; electricity at a fixed per-kWh rate with no markup (monthly fee non-refundable); sites named in its FAQ: Texas and Paraguay; Luxor (0.7% fee) and OCEAN pools. If the service ends within a year the machine passes to Sazmining; one-year manufacturer warranty; 5% discount if you pay in bitcoin or stablecoins; no refunds on machines.
• Blockware: $0.070 per kWh "all-in"; sites in Texas, North Dakota, Missouri and Kentucky; the customer owns the machines (info page).

How do bitcoin mining scams work?

Quick answer: guaranteed returns, cloud mining and fake shops.

Serious providers don't guarantee profits: Sazmining says so on its own page. The HashFlare case shows what cloud mining fraud looks like: according to the US Department of Justice, its equipment mined with less than 1% of the computing power it claimed, and customers had paid over $575 million; the founders were sentenced in 2025 (Decrypt). On fake shops, the FTC says to search the seller's name with "complaint" or "scam", never to buy from sellers who insist on gift cards, wire transfers, payment apps or cryptocurrency, and that paying by credit card protects you best. Some legitimate sellers accept bitcoin, so then it matters even more to know who they are.

What should I ask a miner seller?

1. Who are you? Company name, address, tax ID, how long have you sold miners: can I verify them?
2. New or used? Serial number, manufacturer's invoice, warranty: who honours it, and where?
3. Power draw (W) and efficiency (J/TH): where did you measure them, and do they match the manufacturer's sheet?
4. Final price with tax, duties, shipping, insurance and payment fees, in a written quote?
5. How do I pay and what protection do I get (card, bank transfer, bitcoin)? Refunds and cancellation?
6. Who owns the machine and the bitcoin? Does the payout go to my wallet? Which pool?
7. If the hosting ends or you go out of business, what happens to the machine, at what cost and how fast?
8. Power rate and fees: what do they cover (kWh, rack, network, repairs) and when can they change?

If any answer includes a guaranteed return, stop.

What are the hidden costs: duties, tax, shipping?

Duties depend on the machine's customs classification and origin. The Block reported total US duties, from 7 August 2025, of 21.6% on machines from Indonesia, Malaysia and Thailand and 57.6% on China-made ones (The Block); we couldn't confirm today's rates, so ask for the landed cost in writing. In the UK, GOV.UK says VAT applies to the whole package value (goods, postage, packaging, insurance) plus any duty, paid to the delivery company before delivery or on collection above £135.

Is bitcoin mining legal, and what about tax?

Just pointers. These official pages treat mining as a taxable activity, not a banned one; local rules on power, noise and zoning vary. The IRS says income from digital assets is taxable and lists mining among the receipts to report. HMRC says whether mining is a trade depends on activity, organisation, risk and commerciality; if not, the sterling value at receipt is miscellaneous income. The CRA says that in most cases mining is a business, and ASIC miners can qualify for capital cost allowance. Talk to an accountant before you buy.

Frequently asked questions

Is bitcoin mining still worth it?

It depends on your power price: in our example break-even is about $0.123 per kWh, or $0.062 after the halving. At the US residential average it loses money.

How do I buy a bitcoin miner?

Compare price per TH and efficiency (J/TH), get a written all-in quote with tax and duties, check the seller, and use the eight questions above before paying.

Can you mine bitcoin at home?

You can, but the example machine draws 87.5 kWh a day and makes 75 dB. Power cost and what you do with the heat decide.

What is bitcoin mining hosting?

A provider houses your machine with power and cooling and charges for electricity and fees. Ask what happens if the service ends.

What is the best bitcoin miner to buy?

We don't recommend models: it depends on price per TH, efficiency, your power rate and the seller's terms. Use the checklist and your own numbers.

Not financial advice

This article explains how to think about mining costs. It is not financial advice or investment advice: it doesn't say what to buy, and it promises no returns. The calculations are examples with stated assumptions.

Sources

1. Hashrate Index Roundup, 28 September 2026 (hashprice, bitcoin price, difficulty, fees as a share of rewards).
2. Kryptex, Antminer S21 XP (specs and price; page updated 13 October 2026).
3. Cambridge CBECI (note on efficiency in J/TH).
4. Bitcoin whitepaper (difficulty adjustment).
5. CoinWarz, halving (block 1,050,000, reward, estimated date; read 14 October 2026).
6. U.S. EIA, Electric Power Monthly, Table 5.6.A (average residential price, July 2026, preliminary).
7. Sazmining (official page, read 14 October 2026): hosting terms; company statements.
8. Blockware, info page (read 14 October 2026): rate and sites; company statements.
9. US Department of Justice, United States v. Potapenko and Turogin (HashFlare) and Decrypt (13 August 2025, trade press).
10. FTC, Online Shopping (page dated May 2023).
11. The Block (trade press), Trump's latest tariff overhaul squeezes US bitcoin miners (6 August 2025).
12. GOV.UK, Tax and duty on goods sent from abroad.
13. IRS, Digital assets (page reviewed 2 September 2026).
14. HMRC, Cryptoassets Manual, CRYPTO21150 (updated 28 November 2025).
15. Canada Revenue Agency, Reporting income from crypto-asset mining and staking activities (page dated 10 November 2025).