Bitcoin's supply is hardcoded to decrease by 50% every ~4 years. Each halving has preceded the largest price rallies in Bitcoin's history. The 4th halving occurred on April 19, 2024 at block 840,000 — the current cycle is underway.
The Halving Cycle Position signal tracks daily cycle % progress alongside 24 other on-chain signals.
Embedded in Bitcoin's protocol is a rule: every 210,000 blocks, the reward paid to miners for adding a new block to the chain is cut in half. At launch in 2009, miners earned 50 BTC per block. After four halvings, that reward is now 3.125 BTC per block.
This isn't policy — it's code. No central authority can change it. The halving ensures that Bitcoin's maximum supply remains capped at 21 million coins, with approximately 94% already mined as of 2024. The final satoshi will be mined around the year 2140.
The practical effect: after each halving, roughly 450 fewer BTC enter circulation per day. Miners — who sell a portion of earnings to cover electricity and hardware costs — bring less selling pressure to the market. If demand stays constant or grows while supply drops, price rises to find equilibrium. This mechanism has driven every major Bitcoin bull market.
| # | Date | Reward | Cycle Peak | Peak Gain |
|---|---|---|---|---|
| 1st | November 28, 2012 | 50 → 25 BTC | Nov 2013 (~$1,150) | +57,000% |
| 2nd | July 9, 2016 | 25 → 12.5 BTC | Dec 2017 (~$20,000) | +2,900% |
| 3rd | May 11, 2020 | 12.5 → 6.25 BTC | Nov 2021 (~$69,000) | +700% |
| 4th | April 19, 2024 | 6.25 → 3.125 BTC | Jan 2025 (~$109,000) | +600% |
| 5th (projected) | ~April 2028 | 3.125 → 1.5625 BTC | TBD | TBD |
Gains measured from cycle bottom to cycle peak. Peak gains have diminished each cycle as Bitcoin's market cap grows.
The halving doesn't just affect price psychologically — it mechanically reduces the supply available to sell. Each halving roughly halves the daily sell pressure from miners.
| Era | BTC/Day Issued | % of Original |
|---|---|---|
| 2009 | ~7,200 | 100% |
| 2012 (post-1st halving) | ~3,600 | 50% |
| 2016 (post-2nd halving) | ~1,800 | 25% |
| 2020 (post-3rd halving) | ~900 | 12.5% |
| 2024 (post-4th halving) | ~450 | 6.25% |
| 2028 (post-5th halving) | ~225 | 3.125% |
The halving calendar tells you roughly where you are — on-chain signals confirm it with precision. These are the five signals most closely tied to halving cycle dynamics:
Tracks the exact % progress through the current 4-year cycle. Bottoms have historically formed at 60–75% cycle completion.
Miner revenue today vs. 365-day average. Below 0.5 = miner capitulation near cycle bottom. Post-halving revenue shock drives this signal.
30d/60d MA crossover of hash rate. Miner capitulation phases peak near cycle lows, particularly in the months before a halving.
Price vs. aggregate cost basis. Below 0 = market below realized price — historically the deepest accumulation zone, common in late bear markets before halvings.
Aggregate holder profit/loss. Capitulation zone (NUPL < 0) has coincided with every major bottom — typically forms in the pre-halving bear market trough.
The 4th Bitcoin halving occurred on April 19, 2024 at block 840,000, reducing the block reward from 6.25 BTC to 3.125 BTC. Bitcoin was trading at approximately $63,000 at the halving, having already rallied from the November 2022 cycle bottom at ~$15,500.
Daily miner issuance dropped from ~900 BTC/day to ~450 BTC/day — the smallest supply increase in Bitcoin's history. At the same time, US spot Bitcoin ETFs were absorbing substantially more than the daily mined supply, creating a structural supply-demand imbalance.
The cycle peak of ~$109,000 was reached in January 2025, representing a +600% gain from the cycle low. On-chain signals (MVRV Z-Score, Puell Multiple, NUPL) all moved into overheated territory during the peak, before beginning their reset toward the bottom-detection zone in early 2026.
Historically, yes — but with a delay. The price impact typically emerges 6–18 months after the halving as the reduced supply works through the market. Buying at the exact halving date has not always been optimal; the best entry points have consistently been at on-chain signal convergence during the bear market preceding the halving, not at the halving itself.
Bitcoin will experience 32 total halvings before the block reward becomes zero, which will occur around the year 2140. After the 5th halving (~2028), the reward will be 1.5625 BTC. By approximately 2032 (7th halving), the block reward drops below 0.1 BTC. The total supply of 21 million Bitcoin is asymptotically approached — never exactly reached.
This is debated. On-chain data suggests it is not fully priced in: the Puell Multiple (miner revenue relative to annual average) consistently falls to capitulation levels after halvings, indicating miners are genuinely surprised by the revenue reduction. If the halving were fully priced in, miner behavior would not change. The observed pattern of post-halving miner capitulation and subsequent recovery (visible in the Hash Ribbon) suggests the market repeatedly underestimates the supply shock.
Once all 21 million BTC are mined (~2140), miners will be compensated entirely by transaction fees rather than block rewards. Bitcoin's security model transitions fully to fee-based incentives. This is expected to work because higher adoption means higher transaction volume and fees. Most of this transition is already underway — by 2030, the block subsidy will be less than 0.2 BTC per block.