In one sentence
The Bitcoin halving is an event programmed into the code that cuts the reward miners receive for validating blocks in half, occurring roughly every four years.
The halving is an event programmed into Bitcoin’s code that cuts the reward miners receive for validating blocks in half, occurring roughly every four years.
Bitcoin was designed with a fixed, immutable monetary policy, with 21 million BTC as its total cap, issued gradually as a reward for miners. For that issuance to last more than a century, Satoshi Nakamoto programmed an automatic brake that kicks in every 210,000 blocks, roughly every four years, cutting the reward in half. That brake is the halving.
How the halving works, by the numbers
The sequence is pure arithmetic. The reward started at 50 BTC per block in 2009, dropped to 25 in 2012, to 12.5 in 2016, to 6.25 in 2020, and to 3.125 at the halving in April 2024. Each cut reduces the new supply reaching the market every day, without touching the bitcoins already issued. The process will continue until the 2140s, when issuance reaches zero and miners live solely off fees.
Halving and price, the relationship everyone debates
The first three halvings were followed, in the 12 to 18 months after, by the largest bull cycles in Bitcoin’s history, and that correlation turned the event into the market’s metronome. The economic explanation is reasonable (less new supply with equal or growing demand pushes the price up), but the sample size is small and each cycle had its own context. With each edition, moreover, the market anticipates it more, which according to many analysts dilutes the effect. A historical reference, yes; a guarantee, no.
