What is Bitcoin halving?
Bitcoin halving is a programmed event built into Bitcoin's protocol that cuts the block subsidy (the amount of new BTC miners receive per block) in half. It happens every 210,000 blocks — roughly every 4 years given the 10-minute average block time.
Halvings enforce Bitcoin's hard supply cap of 21 million BTC. Without halvings, new BTC would be issued indefinitely. With them, the last satoshi is estimated to be mined around 2140.
Complete halving data table
| # | Date | Block Height | Reward Before | Reward After | BTC Price (halving day) | Peak price ~18 months after | Status |
|---|---|---|---|---|---|---|---|
| Genesis | Jan 3, 2009 | 0 | — | 50 BTC | ~$0 | ~$32 (Jun 2011) | Done |
| 1st | Nov 28, 2012 | 210,000 | 50 BTC | 25 BTC | ~$12 | ~$1,150 (Nov 2013) | Done |
| 2nd | Jul 9, 2016 | 420,000 | 25 BTC | 12.5 BTC | ~$650 | ~$19,800 (Dec 2017) | Done |
| 3rd | May 11, 2020 | 630,000 | 12.5 BTC | 6.25 BTC | ~$8,700 | ~$69,000 (Nov 2021) | Done |
| 4th | Apr 19, 2024 | 840,000 | 6.25 BTC | 3.125 BTC | ~$63,800 | TBD (est. late 2025) | Done |
| 5th | ~Apr 2028 | 1,050,000 | 3.125 BTC | 1.5625 BTC | TBD | TBD | Upcoming |
Note: Price figures are approximate at-the-time market prices. Peak prices are the observed 12–18 month post-halving highs. Past performance does not guarantee future results.
Halving #1 — November 28, 2012
1st Bitcoin Halving
The first halving cut the block reward from 50 BTC to 25 BTC. At the time, Bitcoin was a niche interest with a market cap well under $200M. The event was watched closely by early adopters but received little mainstream attention.
The rally to ~$1,150 in November 2013 happened approximately 12 months after the halving. It was Bitcoin's first major bull run and drew its first wave of mainstream coverage.
Halving #2 — July 9, 2016
2nd Bitcoin Halving
The second halving reduced rewards from 12.5 BTC. Bitcoin's price had already recovered from the 2014–2015 bear market and was trading near $650 on halving day — its highest level since 2014.
The 2017 bull run culminated at ~$19,800 in December 2017, roughly 17 months after the halving. The ICO boom and mainstream media coverage drove the rally far beyond prior expectations.
Halving #3 — May 11, 2020
3rd Bitcoin Halving
The third halving occurred during the COVID-19 pandemic, cutting rewards from 12.5 to 6.25 BTC. Markets had just crashed in March 2020 and Bitcoin was trading around $8,700. The subsequent rally was the largest in absolute dollar terms.
Bitcoin hit its all-time high of ~$69,000 in November 2021, 18 months after the third halving. Institutional adoption (MicroStrategy, Tesla), PayPal integration, and the first US Bitcoin ETF applications all contributed to the run.
Halving #4 — April 19, 2024
4th Bitcoin Halving
The most-anticipated halving yet, occurring just weeks after the approval of US spot Bitcoin ETFs in January 2024. Block rewards dropped from 6.25 to 3.125 BTC at block 840,000. The ETF launch had already driven a strong pre-halving rally.
The 4th halving is notable because: (1) it occurred in the same year as the first US spot BTC ETF approvals, (2) Bitcoin had already broken its 2021 ATH before the halving, (3) institutional demand from ETF inflows was offsetting reduced miner selling pressure immediately.
Next halving — 2028 forecast
The 5th halving will reduce the block subsidy to 1.5625 BTC. By this point, transaction fees are expected to make up a growing share of miner revenue, as the subsidy becomes an increasingly small fraction of total income.
Supply math
By the time of the 5th halving (~2028), approximately 19.9 million BTC of the 21 million cap will have been mined. The remaining ~1.1 million BTC will be issued over the following ~100 years through progressively smaller halvings.
After the 5th halving, annual BTC issuance will be approximately 82,125 BTC/year (1.5625 BTC × 144 blocks/day × 365), representing under 0.4% of total supply — far below traditional central bank inflation targets.
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When is the next Bitcoin halving?
The next (5th) Bitcoin halving is estimated around April 2028 at block 1,050,000. The exact date depends on actual block times — if blocks average faster than 10 minutes, it will occur earlier.
Why does Bitcoin halving matter?
Halving reduces the rate of new BTC supply. If demand stays constant or grows, reduced supply issuance tends to support price increases over time. Historically each halving has preceded a significant bull market, though timing varies and is not guaranteed.
How many Bitcoin halvings are left?
As of 2026, there have been 4 halvings. Bitcoin has approximately 29 more halvings to go before the block reward reaches zero (around 2140). Each subsequent halving has a smaller absolute impact on supply because the reward is already so small.
Does halving always cause a price rally?
All 3 completed halvings (2012, 2016, 2020) were followed by significant price rallies within 12–18 months. However, each cycle has had unique macro drivers — the 2020 rally was boosted by pandemic-era monetary policy; the 2024 cycle by ETF launches. Halving alone is not a guaranteed price catalyst.
What is the current block reward?
After the April 2024 halving, the current Bitcoin block reward is 3.125 BTC per block. Miners also earn transaction fees on top of this subsidy.
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