Antminer S21 XP: price, profit per day & hosting
The S21 XP is Bitmain's most efficient air-cooled Bitcoin miner: 270 TH/s at about 13.5 J/TH. Air cooling means it runs in a normal rack with fans, so it's the easiest top-efficiency machine to host.
We sell it new from Hong Kong stock and used from our California warehouse. Used units are tested before storage and again before they ship, and come with a 7-day DOA.
- From $2,280
- $2.76/day hosted at 7.75¢
- Hong Kong stock · USA stock
Questions? Telegram (preferred) or WhatsApp +1 (951) 598-1515, or email sales@805mining.com. Wyatt, sales manager, or Scott, owner.
Antminer S21 XP prices and profit
Prices as of October 29, 2026; revenue at network rates from October 29, 2026. Prices move with the market, and we confirm your final price after you order, before you pay.
| Option | Hashrate | Power | Price | Revenue/day | Power at 7.75¢ | Profit/day | Payback |
|---|---|---|---|---|---|---|---|
| Used Ships from California, usually within the week | 270 TH/s | 3,645 W | $2,280 | $9.54 | $6.78 | $2.76 | 826 days |
| New Ships from Hong Kong, usually 1–2 weeks | 270 TH/s | 3,645 W | $3,080 | $9.54 | $6.78 | $2.76 | 1,116 days |
7.75¢/kWh is our metered air hosting rate (7.5¢ for 20+ machines). Revenue is what the hashrate earns per day at current difficulty and coin price; it changes daily. Payback is price divided by today’s profit and ignores future difficulty changes.
Good fit if…
- You want the lowest power cost per TH without moving to hydro
- You plan to host at a site like ours (it's too loud and too hot for a home)
- You want a used unit that ships from the USA within the week
Worth knowing
- Needs 200–240 V power. Expect about 75 dB, so it isn't a home or office machine.
- New units carry the manufacturer's warranty. Used units carry our 7-day DOA.
Antminer S21 XP questions
Is the S21 XP worth it at 7.75¢/kWh?
At today's network rates the table above shows the daily profit after power. Efficiency is what keeps a miner profitable as difficulty rises, and at 13.5 J/TH the S21 XP is among the last air-cooled machines to go negative.
Should I buy a used or a new S21 XP?
Used units cost less and ship from California within the week, with a 7-day DOA. New units come from Hong Kong in 1–2 weeks with the manufacturer's warranty. Hashrate and power are the same.
Can you host my S21 XP?
Yes. Air-cooled hosting at partner sites in Iowa and Idaho is 7.75¢/kWh, metered, or 7.5¢ for 20+ machines. Setup is $50 per machine bought from us.
More answers: buying & hosting FAQ · returns & warranty · delivery
Want a quote on the Antminer S21 XP?
Tell us how many and where it’ll run. We’ll confirm today’s price and shipping.
Other guides: Antminer S21 Pro · Antminer Z15 Pro · Antminer Z15K · Antminer L9 · Antminer S23e U2H Hydro