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A Detailed Breakdown of Bitcoin’s Four-Year Cycles

Bitcoin’s halvings reduce new issuance every 210,000 blocks. Past cycle peaks followed roughly 12 to 18 months later, but the small historical sample cannot predict future prices.
From TheFinanceBase Team4 min to read
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Bitcoin’s four-year cycle is a historical pattern often linked to its halving events: the three completed post-halving periods saw their market peaks about 12 to 18 months after each halving. That pattern is not a rule built into Bitcoin, and it cannot tell you when prices will rise or fall next. A halving reduces the rate of new Bitcoin issuance; demand and broader market conditions still help determine the price.

What is a Bitcoin halving?

A halving cuts the block subsidy—the new Bitcoin awarded to miners for adding a block to the blockchain—in half when the network reaches each 210,000-block threshold. The block count, not a calendar date, triggers the change. Because blocks are produced over time, a halving happens roughly every four years, but the interval is not an exact calendar timer.

The first four halvings took the subsidy from 50 BTC per block to 3.125 BTC per block. A SEC-filed company report lists the events as follows:

Date Block height Subsidy after halving
November 28, 2012 210,000 25 BTC per block
July 9, 2016 420,000 12.5 BTC per block
May 11, 2020 630,000 6.25 BTC per block
April 20, 2024 840,000 3.125 BTC per block

The next threshold is block 1,050,000. The SEC-filed report estimates that it will be reached around April 2028; that calendar timing is an estimate, while the block threshold is the protocol trigger.

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What has happened to Bitcoin prices around past halvings?

The historical pattern is visible in the rounded cycle figures below, reported by Bitcoin.com in a review last updated September 18, 2026. Prices vary by exchange and data aggregate, so the figures are approximate rather than a single definitive price series.

Halving Approximate cycle peak Peak timing after halving Later low and decline from peak
November 28, 2012 About $1,150 in November 2013 About 12 months About $152 in January 2015; roughly an 87% decline
July 9, 2016 About $19,800 in December 2017 About 17 months About $3,200 in December 2018; roughly an 84% decline
May 11, 2020 About $69,000 in November 2021 About 18 months About $15,500 in November 2022; roughly a 77% decline
April 20, 2024 About $126,200 on October 6, 2025 About 18 months Near $58,000 in June 2026; about a 54% decline so far, with the low unconfirmed in the Bitcoin.com review

The latest row is an incomplete cycle, not a settled full-cycle result. Bitcoin.com also reports that Bitcoin set a record high before the April 2024 halving, and that 2025 was the first post-halving year to close negative. Its September 17, 2026 price snapshot put Bitcoin near $76,000, about 40% below the October 2025 record. Those are dated, source-specific observations—not live prices.

How reported cycle returns compare

CoinGecko’s 2025 Bitcoin report gave a peak-cycle return of 29x for 2017 and 6.7x for 2021, measured from each halving through that cycle’s all-time high. It also reported a 93.1% return so far in 2025, explicitly a then-current figure for an incomplete cycle, not a final full-cycle return. These reported figures are not a promise that another cycle will produce a similar return.

Why might a halving matter to price?

A halving reduces the rate at which new Bitcoin enters circulation. If demand holds steady or increases while new issuance slows, the reduced flow of new supply could put upward pressure on price. But the protocol does not set a market price, and the historical cycle record does not establish that a halving caused the subsequent gains.

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Several factors can operate at once: demand may rise or fall; macroeconomic conditions and liquidity can change; traders may buy or sell in anticipation of a widely known event; and access to Bitcoin markets can evolve. Spot Bitcoin exchange-traded funds changed access to the asset during the 2024 cycle. Bitcoin.com discusses these as possible influences, not as a causal result proven by the cycle data.

Does the cycle predict what Bitcoin will do next?

No. The three completed post-halving episodes are too small a sample to establish a dependable timetable or forecast. The Associated Press reported that prices in the first months after the three prior halvings were mixed, although they were substantially higher one year later; it also noted that other bullish conditions contributed to those returns. Kaiko research analyst Adam Morgan McCarthy told AP: “The sample size of three (previous halvings) isn’t big enough to say ‘It’s going to go up 500% again,’ or something.”

The percentage drawdowns in Bitcoin.com’s historical outline—roughly 87%, 84%, and 77% in the three earlier cycles—also do not form a reliable rule. The review’s roughly 54% decline from the October 2025 peak to the June 2026 low was smaller, but the low was unconfirmed in that review. The apparent reduction in peak-to-low swings is an observation across a few episodes, not proof that future declines will be smaller.

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How to compare Bitcoin cycles responsibly

Cycle comparisons can be misleading when the data are measured differently or when a current cycle is incomplete. For a consistent comparison:

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  • Use the same price source or exchange aggregate for every cycle, and state which one you used.
  • Specify whether prices are daily closes or intraday highs and lows, and give the data cutoff date.
  • Compare like with like: halving-to-peak time, peak-to-trough drawdown, and the subsidy change are distinct measurements.
  • Label an ongoing cycle as incomplete; do not compare its return or trough with a completed cycle as if both were final.
  • Consider market context, including demand, macroeconomic and liquidity conditions, and changes in access such as spot Bitcoin ETFs.

The useful takeaway is that halvings create a predictable change in Bitcoin’s issuance schedule, while the market response remains uncertain. Historical timing describes what happened in a few past episodes; it is not a dependable price signal.

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