The Bitcoin halving is a pre-programmed event that cuts the reward miners receive for each new block in half. It happens every 210,000 blocks — roughly every four years — and it is the mechanism that keeps Bitcoin’s total supply capped at 21 million coins. The most recent halving took place in April 2024, reducing the reward from 6.25 to 3.125 BTC per block.
Key takeaways
- Halvings occur every 210,000 blocks, about every four years.
- Each halving cuts new bitcoin issuance by 50%.
- There have been four halvings so far: 2012, 2016, 2020 and 2024.
- The next halving is expected around 2028, when the reward falls to 1.5625 BTC.
How the halving works
New bitcoins are created only as a reward to miners who add valid blocks to the blockchain. Bitcoin’s code says this reward started at 50 BTC and must be divided by two every 210,000 blocks. No committee decides when it happens; every node enforces the rule automatically. Because blocks arrive about every 10 minutes, 210,000 blocks takes roughly four years.
The halving doesn’t affect the coins people already hold. It only slows down how fast new coins are added to the supply.
Bitcoin halving history
| Halving | Date | Block height | Reward after |
|---|---|---|---|
| Launch | January 2009 | 0 | 50 BTC |
| 1st halving | November 2012 | 210,000 | 25 BTC |
| 2nd halving | July 2016 | 420,000 | 12.5 BTC |
| 3rd halving | May 2020 | 630,000 | 6.25 BTC |
| 4th halving | April 2024 | 840,000 | 3.125 BTC |
| 5th halving (expected) | ~2028 | 1,050,000 | 1.5625 BTC |
The exact date of a future halving depends on how quickly blocks are found, so estimates can shift by days or weeks.
Why the halving matters
1. It enforces scarcity
Halvings are why Bitcoin’s issuance curve flattens over time. More than 19 million of the 21 million coins have already been mined, and the remaining ones will trickle out more and more slowly until around 2140.
2. It squeezes miners
Overnight, miners earn half as many new coins for the same work. Less efficient operations can become unprofitable and shut down, while others upgrade hardware or seek cheaper electricity. Over the long run, Bitcoin’s security budget is expected to rely increasingly on transaction fees.
3. It shapes market narratives
Past halvings were followed by large bull markets within 12–18 months, which is why the event gets so much attention. But correlation is not causation: market conditions, adoption and macroeconomics also played huge roles, and the halving is fully known in advance. There’s no guarantee future cycles will look the same.
Bitcoin’s stock-to-flow and inflation rate
Because new supply shrinks with each halving, Bitcoin’s annual inflation rate drops too — after 2024 it fell to below 1% per year, lower than many estimates for gold. Some analysts use a «stock-to-flow» ratio to compare Bitcoin’s scarcity with precious metals, but models built purely on scarcity have proven unreliable at predicting prices.
What should investors do around a halving?
- Zoom out. Look at weekly charts to see the bigger trend — our chart-reading guide explains how.
- Don’t trade on hype. Expectations of a halving rally are widely discussed, so much of it may already be priced in.
- Think in years, not weeks. If you believe in Bitcoin’s long-term thesis, strategies like dollar-cost averaging reduce timing risk.
- Beware of scams. Halving events attract fake «double your bitcoin» giveaways. Learn the warning signs in common crypto scams.
Frequently asked questions
When is the next Bitcoin halving?
The fifth halving is expected in 2028 at block 1,050,000. The precise date depends on block times between now and then.
Does the halving make bitcoin’s price go up?
Not automatically. It reduces new supply, but price depends on demand as well. Historical bull runs after halvings coincided with many other factors.
How many halvings will there be?
About 33 in total. After that, the block reward rounds down to zero and miners rely entirely on transaction fees.
Do other cryptocurrencies have halvings?
Yes, some proof-of-work coins copied the idea. Litecoin, for example, halves its block reward every 840,000 blocks.
New to Bitcoin? Start with What is Bitcoin and how does it work?
