Is ASIC Mining Profitable in 2026?

The honest answer is yes, ASIC mining can be profitable in 2026, and plenty of machines lose money every day they run. Which side of that line you land on comes down to four numbers, and only one of them is on the spec sheet. This guide walks through all four, shows the arithmetic with real machines from our range, and gives you a way to run your own numbers before you spend anything.

• The Four Numbers That Decide Profitability
• The Cost Side: What a Miner Spends
• The Earnings Side: Why We Use Live Data
• Difficulty and Halvings: the Long Game
• When Mining Makes Sense, and When It Does Not
• How to Run Your Own Numbers

The Four Numbers That Decide Profitability

• Your electricity price. The biggest factor by far, and the one nobody can see on a spec sheet. The same machine can pay its way at £0.04/kWh and lose money at £0.25/kWh. Everything else in this guide is downstream of this number.
• Machine efficiency. Measured in watts per terahash. A modern hydro unit like the Antminer S21 Hydro runs at 16 W/TH; an older generation air cooled unit like the S19k Pro runs at 23 W/TH. That gap decides how much of your earnings the electricity bill eats.
• Network difficulty. The SHA-256 network adjusts so blocks arrive on schedule no matter how many machines join. More competition means each terahash earns less. Difficulty trends upwards over time, with pullbacks when older hardware switches off.
• Coin price. Your rewards are paid in the coin you mine, so their value in pounds moves with the market every day. This is the number nobody controls and nobody can predict.

Uptime and pool fees matter too, but they are small levers next to these four.

The Cost Side: What a Miner Spends

Costs are the part you can calculate exactly, today, with no predictions involved. A miner’s daily electricity cost is its power draw multiplied by 24 hours multiplied by your rate. Three machines from our range, at an illustrative UK domestic rate of £0.25/kWh against our hosted rate of £0.04/kWh:

• Antminer S19k Pro 110Th at 2,530W uses 60.72kWh a day: about £15.18 at home, £2.43 hosted.
• Antminer L9 17Gh at 3,570W uses 85.68kWh a day: about £21.42 at home, £3.43 hosted.
• Antminer S21 Hydro 319Th at 5,104W uses 122.5kWh a day: about £30.62 at home, £4.90 hosted.

Notice the pattern: the electricity rate changes the running cost by a factor of six. That is why the same machine can be a sound purchase for one buyer and a mistake for another, and why the hosting or home question is worth answering before the which machine question. Add the purchase price, any electrical work and a margin for repairs, and you have the full cost side.

The Earnings Side: Why We Use Live Data

Any article that prints a fixed monthly earnings figure for a miner is wrong by the time you read it. Earnings move daily with coin price and difficulty, which is why we publish live figures instead of static claims.

Every listing in our shop shows estimated daily, monthly and yearly earnings calculated from current prices and difficulty, and our live profitability table ranks every machine we track by those numbers. For the earnings leaders at any given moment, see the most profitable miners ranking, and for the machines that keep the most of what they earn, the efficiency ranking. If you want an independent check with your own electricity rate in the calculation, WhatToMine shows the working in full.

All of these figures, ours included, are estimates modelled at a point in time. They are not guarantees, and they move in both directions.

Difficulty and Halvings: the Long Game

Two forces push against miners over time, and pretending otherwise sells machines dishonestly.

The first is difficulty. As more efficient hardware comes online, each unit of hashrate earns a smaller share. You can watch this happen in real time on mempool.space. The practical effect: a machine’s earnings in its second year are usually lower than its first, unless the coin price rises to offset it.

The second is the halving. Roughly every four years the Bitcoin block reward halves; since April 2024 it has been 3.125 BTC per block, and the next halving is expected in 2028. Each halving cuts the base earnings of every SHA-256 miner in half overnight. Historically, price movements have softened or overwhelmed that cut, but nobody can promise that pattern repeats.

What this means for buyers: efficiency is the margin of safety. When difficulty rises or rewards halve, the machines at 16 W/TH keep running while the machines at 30 W/TH switch off. Buying near the front of the efficiency curve is how you stay on the right side of that line for longer.

When Mining Makes Sense, and When It Does Not

• Strong position: cheap or free power. Solar, wind, hydro or a hosted rate near £0.04/kWh transforms the arithmetic. This is where most sustainable operations live.
• Strong position: heat you would pay for anyway. A miner is a 100% efficient electric heater that pays you something back. Workshops and outbuildings that need heating change the sums.
• Weak position: full domestic rates. At £0.25/kWh or more, most current machines struggle. Run the numbers before buying, and treat any seller who skips this warning with suspicion.
• Weak position: borrowed money or money you cannot afford to lose. Mining returns move with a volatile market. If a bad six months would hurt you, this is not the place for those funds.

If you are starting at home, our guide to home Bitcoin mining setup covers the practical side: power, noise, heat and what UK sockets can actually supply.

How to Run Your Own Numbers

1. Find your real electricity rate in pounds per kWh from your bill, not a national average.
2. Pick a machine and take its power draw and hashrate from the listing.
3. Calculate your daily cost: power in kW, times 24, times your rate.
4. Compare that against the live estimated earnings on the listing and on WhatToMine at your rate.
5. Stress test it: assume earnings 30% lower and ask whether you would still be comfortable. Difficulty rises and prices fall, sometimes together.
6. Compare the same machine at a hosted rate on our hosting page. If home rates kill the numbers, hosting from £0.04/kWh may not.

Ten minutes with a calculator beats any promise anyone can make you. If you want a second pair of eyes on your sums, talk to the team: we have mined since 2011 and we will tell you honestly whether the numbers work at your rate, including when the answer is no.