The Bitcoin Halving, Explained Simply
Roughly every four years, an event coded into bitcoin since day one cuts the supply of new coins in half. It's called the halving, and it's the reason bitcoin is often described as "digital gold" — its scarcity isn't a promise, it's arithmetic.
What actually happens
Bitcoin miners earn newly created bitcoin as a reward for adding blocks to the blockchain. When bitcoin launched in 2009, the reward was 50 BTC per block. Every 210,000 blocks — about four years — that reward is cut in half:
- 2009: 50 BTC per block
- 2012: 25 BTC
- 2016: 12.5 BTC
- 2020: 6.25 BTC
- 2024: 3.125 BTC
- 2028 (expected): 1.5625 BTC
This continues until around the year 2140, when the last fraction of the 21 millionth bitcoin is mined. After that, no new bitcoin will ever be created.
Why it exists
Every currency in history has faced the same temptation: whoever controls the supply eventually prints more. Bitcoin's creator removed that decision from human hands entirely. The halving schedule makes bitcoin's inflation rate fall automatically over time — today it's already lower than gold's annual supply growth.
What halvings have meant for price
Historically, each halving preceded a major bull market: 2012 was followed by the run to $1,000, 2016 by the run to $20,000, 2020 by the run to $69,000, and the 2024 halving coincided with the ETF-driven rally past $100,000. Correlation isn't destiny — each cycle's returns have also been smaller than the last as bitcoin has grown. But the mechanism is real: demand meeting a supply that just got scarcer.
You can see every one of these cycles on our logarithmic price chart — on a log scale, the rhythm is hard to miss.
The bottom line
The halving is bitcoin's monetary policy, published in advance and enforced by code. No committee meets, no vote is held. That predictability — in contrast to every other currency on earth — is a big part of why people hold it.