Fourth Bitcoin halving occurs at block 840,000

On April 20, 2024, Fourth Bitcoin halving occurs at block 840,000. Bitcoin's block subsidy falls from 6.25 BTC to 3.125 BTC at block 840,000.

At block 840,000 the block subsidy fell from 6.25 BTC to 3.125 BTC. The change was automatic under Bitcoin's fixed issuance schedule and immediately reduced the number of new bitcoin paid to miners for each block.

The event is historically useful because Bitcoin's development history is built not only from activated consensus changes but also from standards, implementation milestones, security maintenance and proposals that shape later engineering choices.