Bitcoin miners earn two types of revenue: transaction fees paid by users for faster transaction processing, and newly created bitcoins issued into existence according to a fixed formula, known as the block subsidyCITE:E1. Together, fees and the block subsidy make up a miner's total block reward, and the balance between the two shifts as the subsidy itself shrinks over timeCITE:E1.
Bitcoin's protocol cuts the number of new bitcoins generated per block by 50% every 210,000 blocks, or roughly every four years, following a geometric reduction scheduleCITE:E2. The fourth halving under this schedule occurred in April 2024, cutting the block subsidy from 6.25 BTC to 3.125 BTC per block, according to Riot Platforms' Form 10-K for fiscal year 2024 filed with the U.S. Securities and Exchange CommissionCITE:E3.
Bitcoin's issuance schedule automatically halves the number of new coins created each year until issuance stops completely, at which point a total of 21,000,000 bitcoins will existCITE:E4. Because each halving reduces new supply by 50% rather than stopping it outright, the 210,000-block halving cycle documented above is the mechanism that steps issuance down toward that fixed ceilingCITE:E2CITE:E4.
Bitcoin's mining difficulty is recalculated every 2,016 blocks based on how long the network took to find the previous 2,016 blocksCITE:E5. At the network's target rate of one block every 10 minutes, 2,016 blocks would take exactly two weeks to produce, so in practice difficulty adjusts on a roughly two-week cycleCITE:E5.
The Cambridge Centre for Alternative Finance's CBECI real-time best-guess estimate puts Bitcoin's annualized electricity consumption at about 150 TWh, equivalent to roughly 17 GW of continuous power draw, as of September 2, 2026, based on an assumed electricity price of $0.05 per kWhCITE:E6. CCAF's modeled range runs from a low estimate of about 78 TWh (8.86 GW) to a high estimate of about 288 TWh (32.85 GW), reflecting uncertainty in the network's real-time hash rateCITE:E6.
Riot Platforms states in its FY2024 10-K that if a corresponding and proportionate increase in Bitcoin's price does not follow future halving events, the revenue it earns from mining operations would decrease, which could have a material adverse effect on its results of operations and financial conditionCITE:E7. That risk disclosure follows directly from the same April 2024 event described above, in which Riot's per-block subsidy was cut from 6.25 to 3.125 BTCCITE:E3CITE:E7.
| Metric | Value | Source |
|---|---|---|
| Halving interval | 210,000 blocks (~4 years) | CITE:E2 |
| Block subsidy before April 2024 | 6.25 BTC | CITE:E3 |
| Block subsidy after April 2024 | 3.125 BTC | CITE:E3 |
| Total supply cap | 21,000,000 BTC | CITE:E4 |
| Difficulty adjustment interval | 2,016 blocks (~2 weeks) | CITE:E5 |
| Target block time | 10 minutes | CITE:E5 |
| Estimated annual electricity use (best guess) | ~150 TWh | CITE:E6 |
| Estimated power draw (best guess) | ~17 GW | CITE:E6 |
| Electricity use range (low–high) | 78–288 TWh | CITE:E6 |
| Power draw range (low–high) | 8.86–32.85 GW | CITE:E6 |
| Assumed electricity price used by CCAF | $0.05/kWh | CITE:E6 |
The protocol's two clocks run independently of price: the halving cycle steps the block subsidy down by 50% every 210,000 blocks toward the fixed 21 million coin cap, while difficulty resets every 2,016 blocks based purely on how fast blocks were foundCITE:E2CITE:E4CITE:E5. Neither mechanism responds to Bitcoin's market price, yet miners' costs are measured against a network CCAF estimates consumes roughly 150 TWh a year, and their April 2024 revenue per block was fixed at 3.125 BTC regardless of price movementCITE:E6CITE:E3. Riot Platforms' own risk disclosure names the resulting gap directly: absent a proportionate price increase after a halving, mining revenue fallsCITE:E7.
Bitcoin miners earn two types of revenue: transaction fees paid by users for faster transaction processing, and newly created bitcoins issued into existence acc…
Bitcoin's protocol cuts the number of new bitcoins generated per block by 50% every 210,000 blocks, or roughly every four years, following a geometric reduction…
Bitcoin's issuance schedule automatically halves the number of new coins created each year until issuance stops completely, at which point a total of 21,000,000…
Bitcoin's mining difficulty is recalculated every 2,016 blocks based on how long the network took to find the previous 2,016 blocksCITE:E5.
The Riot Platforms filing states the core structural tension in Bitcoin mining plainly: a fixed, halving subsidy schedule meets a variable market price with no protocol-level mechanism to reconcile the two. Difficulty resets every 2,016 blocks regardless of what Bitcoin trades for, meaning miners keep covering electricity costs against a network CCAF estimates at roughly 150 TWh a year even after their per-block revenue was cut from 6.25 to 3.125 BTC in April 2024. The date of the next halving isn't the variable worth watching, since the 210,000-block interval is fixed by protocol; what matters is whether price moves proportionately in the quarters that follow, which is exactly the non-relationship Riot's own 10-K flags as a threat to its financial condition.
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