Bitcoin hashprice rises 4.1% despite a higher mining difficulty
Source report: 2026-09-21 · Editorial analysis published: 2026-09-22
Luxor's September 21 snapshot puts spot hashprice at $40.93 per PH/s/day after a 4.16% difficulty increase. The dollar rebound is not a guarantee of net profit.
Analysis and practical implications
This section is our analysis and illustrative calculations, separate from the source report.
The dated market snapshot
Hashrate Index's September 21 weekly roundup records spot USD hashprice of $40.93 per PH/s per day, up 4.1% from $39.31 a week earlier. Bitcoin's spot price rose about 10.9% over the same seven-day comparison, while the network difficulty increased 4.16% on September 19 to 132.76 trillion. These values describe the publisher's roughly 19:00 UTC snapshot, not live prices on every later visit. Hashprice is gross expected Bitcoin mining revenue for a unit of hashrate; it excludes a farm's electricity, hosting, pool and financing costs.
Why revenue moved against difficulty
A difficulty rise normally reduces the expected BTC earned by each unchanged miner between adjustments. Yet USD hashprice also responds to Bitcoin's dollar price and transaction fees. In this week, the dollar price gain outweighed the difficulty drag in the reported USD measure. That does not imply the BTC-denominated measure improved: the roundup puts BTC hashprice at 0.00047652 BTC per PH/s/day, down 3.9% from 0.00049594. Operators should separate coin output from the dollar value of those coins when explaining a weekly revenue change.
Hashrate and the latest retarget
The seven-day simple moving average of network hashrate eased from 949 to 946 EH/s, a 0.3% change, while the 30-day average stood at 934 EH/s. The September 19 difficulty adjustment is historical; a displayed estimate of minus 1.80% for the next adjustment around October 3 is a forecast based on early-epoch blocks, not a scheduled protocol result. At the time of the report only 347 of 2016 blocks in the new epoch had been mined. A few unusually fast or slow blocks can move such an early estimate substantially.
Fees remain a small component
The publisher counted about 3,203 BTC in block rewards over the week and about 19 BTC in transaction fees, with fees equal to 0.59% of the stated block-reward total. It also reports average fees of 0.0191 BTC per block for the seven-day period, up from 0.0185 BTC previously. That small fee share means miners still depend mainly on the subsidy and the Bitcoin exchange price in dollar accounting. The figures are network aggregates, not what any particular pool or ASIC earned; pool payout rules and uptime alter realized receipts.
A transparent example, not a quote
At the stated hashprice, a hypothetical 200 TH/s machine represents 0.2 PH/s and would imply about $8.19 in gross daily revenue: 0.2 multiplied by $40.93. If it drew 3.5 kW continuously, it would use 84 kWh each day; at an illustrative $0.06/kWh the electricity bill would be $5.04, leaving roughly $3.15 before pool fees, cooling, repairs, downtime, taxes and hardware cost. This arithmetic is our scenario, not a manufacturer specification or a profitability promise. A different tariff or acceptance rate can reverse the result.
Energy hashprice helps compare fleets
Luxor's fleetwide energy-revenue bands show about $136 per MWh for equipment below 14 J/TH and $99 per MWh for the 14–19 J/TH band. These are gross compute revenues per consumed energy under the report's market assumptions, not an electricity tariff that every operator can afford. Site PUE, transformer losses and hydro-cooling auxiliaries can add energy beyond the ASIC nameplate. A useful operating comparison needs wall-meter consumption and accepted pool shares for each group, with identical time windows.
What the forward curve can and cannot say
The roundup says the six-month forward market averaged roughly $38.96 per PH/s/day, below the snapshot's $40.93 spot value. Forward prices express current trading terms and risk premia; they do not prove future spot hashprice will follow that exact path. Similarly, the report's stock-price table is a dated market observation, not a proxy for ASIC revenue. A farm buying machines on credit should stress-test lower Bitcoin prices, higher difficulty, power interruptions and repair periods separately instead of treating one favorable week as a durable margin.
What to check next
Recheck the next difficulty retarget using finalized blocks, compare several hashprice days rather than one close, and reconcile pool statements against meter data. Record the quote date and units whenever sharing screenshots: $/PH/s/day, BTC/PH/s/day and $/MWh answer different questions. This weekly report is valuable because it shows a price-driven dollar rebound even with higher difficulty and modest fees. It does not establish that every miner became profitable or that the network has entered a sustained expansion cycle.
Source: Hashrate Index / Luxor ↗
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