Bitcoin halving cycles follow a fixed schedule and a loose pattern. The block reward has been cut in half four times, on November 27, 2012, July 9, 2016, May 11, 2020 and April 20, 2024, and now stands at 3.125 BTC per block, with the next cut to 1.5625 BTC expected around April 17, 2028 at block 1,050,000 [1]. Twelve months after the 2016 halving bitcoin (BTC) was up 282%, twelve months after the 2020 halving it was up 563%, and twelve months after the 2024 halving it was up 35% [3]. The cycle peaks came 17 to 18 months after each halving: $19,650 on December 16, 2017, $67,510 on November 8, 2021, and $124,720 on October 5, 2025, after which bitcoin fell 53.0% to $58,586 on June 30, 2026 [3]. On September 22, 2026, 29 months after the 2024 halving, bitcoin closed at $86,172 in DataPorium's series, 33% above its halving-day price [3][4].
What a halving is and why bitcoin halving cycles exist
Bitcoin's software pays miners a fixed number of new coins for each block, and cuts that number in half every 210,000 blocks, roughly every four years [1]. The reward started at 50 BTC, fell to 25 at block 210,000 in 2012, 12.5 at block 420,000 in 2016, 6.25 at block 630,000 in 2020 and 3.125 at block 840,000 in 2024 [1][2]. Because the supply of bitcoin is capped at 21 million, each halving reduces the flow of new coins reaching the market. The 2024 halving cut daily issuance from about 900 to about 450 BTC. The cycle theory holds that a sudden drop in new supply, against steady or rising demand, pushes prices up over the following year or two, and that the resulting speculation eventually overshoots and unwinds.
Prices on each halving day, per CoinMarketCap, were $12.20 in 2012, $640.56 in 2016 and $8,605 in 2020 [2]. The Coinbase series published by FRED begins in December 2014 and puts the 2016 and 2020 halving-day prices at $658 and $8,557, and the 2024 halving-day price at $64,906 [3].
What history shows in the 12 to 18 months after a halving
| Halving | Price on halving day | 6 months later | 12 months later | 18 months later | Peak within 18 months |
|---|---|---|---|---|---|
| July 9, 2016 | $658 | $903 (+37%) | $2,509 (+282%) | $14,481 (+2,102%) | $19,650 on Dec 16, 2017 (+2,888%) |
| May 11, 2020 | $8,557 | $15,724 (+84%) | $56,719 (+563%) | $64,794 (+657%) | $67,510 on Nov 8, 2021 (+689%) |
| April 20, 2024 | $64,906 | $67,346 (+4%) | $87,522 (+35%) | $108,362 (+67%) | $124,720 on Oct 5, 2025 (+92%) |
Source: FRED series CBBTCUSD (Coinbase), DataPorium calculations [3].
Three regularities appear. The first year after a halving has been positive in all three cases for which daily data exist, but the size has shrunk from 282% to 563% to 35% [3]. The cycle peak has landed 17 to 18 months after the halving each time: December 2017, November 2021 and October 2025 [3]. And the first six months have been unremarkable: +37%, +84% and +4%, with a drawdown to $537 in August 2016 and to $53,930 in September 2024 before the larger moves began [3].
Why the 2024 cycle was the weakest
Diminishing returns are the simplest explanation. Each halving removes half of a smaller flow: the 2024 cut took issuance from roughly 1.7% to roughly 0.85% of the existing supply a year, on a much larger base, so the supply shock was smaller in relative terms than in 2016 or 2020. A second factor is that the price had already moved. Bitcoin rose 130% in the 12 months before the 2024 halving, compared with 144% before 2016 and 19% before 2020, so more of the cycle's gain was booked before the event [3]. Spot ETFs launched in the months before the halving and brought in demand ahead of the event rather than after it. The result was a peak gain of 92% versus 689% and 2,888% in the two prior cycles [3].
What happened after the peaks
The pattern after month 18 has been the least flattering part of the cycle. After the December 2017 peak, bitcoin fell to $3,183 by December 15, 2018, an 84% decline [3]. After the November 2021 peak, it fell 76.7% to $15,756 on November 21, 2022 [3]. After the October 2025 peak, it fell 53.0% to $58,586 on June 30, 2026, a shallower decline than either prior cycle, and had recovered to $86,250 in the Coinbase series by September 22, 2026 [3]. DataPorium's daily series shows the same recovery from a $58,559 close on June 30 to $86,172 on September 22, including a 6.7% gain on September 21 alone, and a 52-week range from $57,748 to $126,198 [4]. The cycle map says the period 24 to 30 months after a halving has been a bear market twice and, so far, a shallower correction and recovery the third time.
- 2016 cycle: peak 17 months after halving, then an 84% decline over 12 months [3].
- 2020 cycle: peak 18 months after halving, then a 76.7% decline over 12 months [3].
- 2024 cycle: peak 17.5 months after halving, then a 53.0% decline over 9 months and a partial recovery [3][4].
What the pattern can and cannot tell investors
Three data points are not a law. The halving dates are fixed and public, so any predictable price effect should be arbitraged away by traders who buy in advance, and the shrinking post-halving returns are consistent with exactly that happening [3]. The 18-month peaks may reflect the halving, or they may reflect global liquidity cycles that happened to line up with it. Bitcoin's volatility remains the dominant fact: the Coinbase series shows annualized volatility of daily returns of about 43% over the year to September 22, 2026 and 46% over three years, so a cycle that is right on direction can still be wrong on timing by enough to force a sale at a loss [3]. The market-oriented view is that a transparent, rule-based issuance schedule is a strength, because no committee can change it, and that this predictability is part of why institutional products were built on it. The fair counterpoint is that a fixed schedule does nothing to stabilize demand, and demand is what drove the 84%, 77% and 53% declines.
Investors may consider using the halving calendar for what it reliably provides, a known supply path toward the 2028 halving, and using price data rather than the calendar for risk. The daily history behind these figures is available on DataPorium's crypto page [4]. The next halving is expected around April 17, 2028 at block 1,050,000, when the reward falls to 1.5625 BTC [1].
Every bitcoin halving since 2016 has been followed by a 12-month gain and a peak about 17 to 18 months later, but the gains shrank from 282% to 563% to 35% and each peak gave way to a decline of 53% or more.
Key takeaways
- Halvings occurred in November 2012, July 2016, May 2020 and April 2024; the reward is now 3.125 BTC and the next cut is expected around April 17, 2028 [1].
- Twelve months after the 2016, 2020 and 2024 halvings bitcoin was up 282%, 563% and 35% [3].
- Cycle peaks came 17 to 18 months after each halving: December 2017, November 2021 and October 2025 [3].
- Declines after the peaks were 84%, 76.7% and 53.0%; the 2024 cycle was both the weakest rally and the shallowest drawdown [3].
- Bitcoin closed at $86,172 on September 22, 2026, 33% above its 2024 halving-day price [3][4].
Frequently asked questions
What happens to bitcoin's price after a halving?
In the three halvings with daily price data, bitcoin was up 282%, 563% and 35% twelve months later and peaked 17 to 18 months later, at $19,650 in December 2017, $67,510 in November 2021 and $124,720 in October 2025, before falling 84%, 76.7% and 53.0% [3].
When is the next bitcoin halving?
It is expected around April 17, 2028 at block 1,050,000, when the block reward falls from 3.125 to 1.5625 BTC [1].
How did the 2024 bitcoin halving compare with earlier ones?
It was the weakest: a 35% gain after 12 months and a 92% gain to the October 2025 peak, versus 2,888% and 689% peaks in the 2016 and 2020 cycles, partly because bitcoin had already risen 130% in the year before the halving [3].
Where is bitcoin relative to the 2024 halving now?
On September 22, 2026, about 29 months after the halving, bitcoin closed at $86,172, 33% above its halving-day price and 31% below the October 2025 peak [3][4].
