Crypto Gloss

Bitcoin Halving 2024

The Bitcoin Halving of April 19–20, 2024 (block 840,000) was the fourth halving in Bitcoin’s history, reducing the block subsidy from 6.25 BTC to 3.125 BTC per mined block. This cut Bitcoin’s annualized inflation rate roughly in half and reduced the daily issuance of new Bitcoin from approximately 900 BTC to 450 BTC.

The 2024 halving was historically distinctive for one reason above all others: it was the first halving to occur in the presence of large-scale institutional demand created by the spot Bitcoin ETFs. Previous halvings took place when Bitcoin was primarily inaccessible to institutional capital. The 2024 halving reduced supply issuance at the same moment that regulated ETF products were creating unprecedented new demand.

Halving History

Halving Date Block Reward Before Reward After BTC Price at Halving
1st Nov 28, 2012 210,000 50 BTC 25 BTC ~$12
2nd Jul 9, 2016 420,000 25 BTC 12.5 BTC ~$650
3rd May 11, 2020 630,000 12.5 BTC 6.25 BTC ~$8,600
4th Apr 19–20, 2024 840,000 6.25 BTC 3.125 BTC ~$64,000

Halvings occur every 210,000 blocks — approximately every four years given Bitcoin’s 10-minute target block time. They will continue until approximately 2140, when the last satoshi is mined and block rewards reach zero.

The 2024 Halving: What Was Different

Supply context: At the time of the 2024 halving, cumulative Bitcoin supply was approximately 19.7 million BTC out of the 21 million maximum. Only ~1.3 million BTC remain to be mined — distributed over more than a century of decreasing issuance.

ETF demand context: The spot Bitcoin ETFs approved in January 2024 were absorbing approximately 3,000–5,000+ BTC per day in net inflows during their strongest early months, against a total new supply of 900 BTC/day (pre-halving). After the halving, new supply dropped to 450 BTC/day while ETF demand continued. This supply-demand imbalance was qualitatively different from anything seen in previous halving cycles.

Ordinals and inscription fees: By April 2024, Bitcoin’s Ordinals ecosystem had created sustained demand for block space, with transaction fees representing a meaningfully larger fraction of total miner revenue than in previous cycles. The halving’s impact on miner economics was partly cushioned by elevated fee income.

Miner economics: Halvings are particularly consequential for miners. The 2024 halving cut miner revenue from block subsidies by 50% overnight. This created:

  • Pressure on inefficient miners with high electricity costs
  • Acceleration of consolidation toward large-scale, low-cost operations
  • Migration to jurisdictions with cheapest power (US states, Kazakhstan, Ethiopia, Paraguay)

The “Halving Trade”

Halvings have historically been associated with bullish price cycles:

  • 12–18 months before the halving: Pre-halving accumulation as market anticipates supply reduction
  • Immediately post-halving: Mixed/flat (buy the rumor, sell the news dynamic)
  • 12–18 months post-halving: Strong bull market as reduced supply issuance compounds with any demand catalysts

The 2024 cycle was complicated because Bitcoin had already reached new all-time highs in March 2024 (~$73,000) before the halving — a pattern not seen in previous cycles, attributed to the ETF demand catalyst. This led many analysts to question whether the traditional “halving trade” still applied.

Post-Halving Market Performance (2024)

Bitcoin’s post-halving price trajectory in 2024 was generally bullish:

  • March 2024: New ATH ~$73,000 (pre-halving)
  • Post-halving April–June 2024: Consolidation, some pullback
  • November 2024: Election-related rally to new ATH ~$99,000
  • December 2024–January 2025: Price volatility around the $90,000–$107,000 range

Significance for Miners

After the 2024 halving, mining economics compressed dramatically:

  • At $65,000 BTC price and 3.125 BTC reward: ~$200,000 per block mined
  • Break-even electricity cost for efficient ASICs (Antminer S21 series): ~$0.03–0.06/kWh
  • Miners paying over $0.07/kWh faced losses at $65,000 BTC; profitability required either higher BTC prices or lower power costs

The public mining companies (Marathon Digital, Riot Platforms, CleanSpark) had raised capital in advance to upgrade hardware (S21, S21 Pro ASICs) before the halving, specifically to survive the revenue compression.

Related Terms

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