Bitmain · 2023
Antminer S21 Profitability
200 TH/s · 3500W · 17.5 J/TH. The efficiency baseline that reset 2024 fleets. Below is the live break-even and profit at today's hashprice.
Break-even power
$0.065
per kWh, at today's hashprice
Gross revenue
$5.46
per day, before power
Network hashprice
$0.0273
per TH/s per day
Profit at your power rate
Daily and monthly net for one Antminer S21 at today's hashprice, by electricity rate (before pool fees, hosting, and repairs). Green is profit, red is loss.
| Power rate | Net / day | Net / month |
|---|---|---|
| $0.03/kWh | $2.94 | $88.12 |
| $0.04/kWh | $2.10 | $62.92 |
| $0.05/kWh | $1.26 | $37.72 |
| $0.06/kWh | $0.42 | $12.52 |
| $0.07/kWh | -$0.42 | -$12.68 |
| $0.08/kWh | -$1.26 | -$37.88 |
| $0.10/kWh | -$2.94 | -$88.28 |
| $0.12/kWh | -$4.62 | -$138.68 |
Estimates at 100% uptime, before pool fees, hosting, and repairs. Educational only — not financial or operational advice.
Antminer S21 profitability FAQ
Is the Antminer S21 profitable in 2026?
At today's hashprice (about $0.0273/TH/day), the Antminer S21 breaks even around $0.065/kWh before pool fees, hosting, and repairs. Pay less than that for power and it profits; pay more and it loses money.
How much does the Antminer S21 make per day?
At today's hashprice it earns about $5.46 per day in gross revenue before electricity. Your net depends entirely on your power rate — see the table above.
What is the Antminer S21's efficiency?
17.5 J/TH — 200 TH/s at 3500W. Lower J/TH means more hashrate per watt, which is what decides survival when hashprice falls.
Is the Antminer S21 worth buying used?
Only if your power rate sits comfortably below its break-even. A cheap machine on expensive power still loses money. Run your real numbers in the calculator before buying.
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