Bitcoin Mining Revenue Sees Modest Relief After September Retarget

Bitcoin mining revenue edges up after September retarget

Bitcoin's recent price rally gave miners a modest revenue boost after the network's September difficulty increase. A new CryptoSlate analysis found that the theoretical gross revenue per unit of computing power is now about 2.65% above the prior model baseline. However, transaction fees contributed almost nothing to this improvement, and a projected difficulty decline comes from an incomplete data set.

Key numbers

• BTC price: $84,751
• Difficulty increase on Sept. 19: 4.16%, from 127.451 trillion to 132.757 trillion
• Theoretical gross hashprice: about $40.31 per petahash per second per day
• Transaction fees across a 144-block sample: roughly 0.45% of total rewards
• Projected next difficulty change: down 2.48%, based on 14.43% of the epoch completed

Price rose above the modeled revenue hurdle

Before the September retarget, CryptoSlate calculated that BTC would need to reach about $82,877 to offset the expected revenue-per-hash impact of the difficulty increase. The actual price of $84,751 came in about 2.26% above that threshold. Since the Sept. 15 model was created, BTC's price had risen roughly 7.07% while the completed difficulty increase was 4.16%, improving the price-to-difficulty ratio by about 2.79%.

Hashprice measures the theoretical gross revenue a miner earns per unit of computing power each day. It depends on the block subsidy, transaction fees, BTC price, and network difficulty. The figure here is a theoretical benchmark, not reported profit.

Transaction fees contributed little to miner income

Blocks numbered 967,828 through 967,971 produced about 2.04858206 BTC in total fees, averaging roughly 0.01422626 BTC per block. That represented approximately 0.45% of the 452 BTC total reward across those 144 blocks. The analysis notes that this narrow window does not establish a durable fee regime, and that miner revenue remains overwhelmingly dependent on the block subsidy and BTC's price.

The projected difficulty decline is still an early signal

The next difficulty estimate points to a 2.48% reduction around Oct. 3. However, this projection was calculated when only 14.43% of the new epoch had been completed, with blocks averaging about 625.3 seconds. Bitcoin recalibrates its difficulty every 2,016 blocks to keep average block production near 10 minutes. Because block discovery is stochastic, short early samples can shift sharply even if the underlying computing power has not moved as much.

Research from Hashrate Index found that forecasts based on constant block times are especially inaccurate near the beginning of an epoch. Mempool's one-month estimated hashrate ranged from about 826.1 EH/s to 1.053 ZH/s, with the current estimate near 937.5 EH/s, showing no sustained collapse.

What the data confirms

Confirmed facts include: difficulty rose 4.1634% at block 967,680 on Sept. 19, from 127.451 trillion to 132.757 trillion; BTC was priced at $84,751 at the time of reporting; theoretical gross hashprice reached about $40.31 per petahash per second per day; fees averaged about 0.01422626 BTC per block across the 144-block sample; and the projected difficulty change stands at negative 2.48% with 14.43% of the epoch completed.

What remains unclear about mining conditions

The projected difficulty decline does not prove that miners are shutting down equipment, curtailing operations, or migrating machines. Network hashrate estimates are inferred from block production patterns, not from direct readings of individual machines, and the evidence does not support treating the early estimate as a diagnosis of any specific operator-level change. Additionally, network-wide revenue data cannot determine which individual operators were profitable, since fleet efficiency, power contracts, and other costs vary widely across businesses.

What would make the relief durable

Three factors would strengthen the case for sustained mining revenue improvement. First, BTC price remaining above the prior modeled hurdle would preserve the relief created by the rally. Second, larger fee contributions would add a second source of revenue instead of leaving miners almost entirely dependent on the subsidy and price. Third, a downward difficulty retarget that survives a much larger share of the epoch would provide stronger evidence that effective network hashrate had softened. Even then, the data would not identify the operational cause behind any hashrate changes.

Sources

• CryptoSlate