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By
Thomas StelzerUpdated
The next Bitcoin halving has an approximate ETA of early 2028 when Bitcoin reaches a block height of 1,050,000.
This will see Bitcoin mining rewards drop from 3.125 BTC to 1.5625 BTC per block.
Approximately every 4 years, the Bitcoin network experiences a halving — an event that has historically preceded a Bitcoin bull run.
In simple terms, the Bitcoin halving is when Bitcoin mining rewards are cut in half. This has the effect of slowing the supply of new Bitcoin coming into existence.
Bitcoin's monetary policy is programmatic and built into the protocol's code. There will only ever be 21 million Bitcoin (BTC), and the schedule for which Bitcoin tokens are mined — or brought into existence — was established in the original design of Bitcoin.
Every 10 minutes or so, a Bitcoin block is mined. A block is filled with records of transactions that occurred on the Bitcoin network. To mine a block, a Bitcoin miner must contribute computational power to the network. For contributing this power, Bitcoin miners earn a block reward — a set amount of Bitcoin for each block they mine.
After every 210,000 blocks — about 4 years — the block reward size is cut in half. For the first 210,000 blocks, the block reward was 50. After the next 210,000 blocks, the reward was cut to 25, and so on.
The halving occurs to control the number of new Bitcoin tokens that come to market and to keep Bitcoin a scarce asset.
Because Bitcoin's inflation is controlled and decreases over time, the asset's price should continually increase — at least theoretically.
Thus far, this dynamic has played out, and it should continue to play out as Bitcoin becomes more widely adopted.
The next Bitcoin halving will take place around March to April 2028. As the halving is scheduled to take place when Bitcoin hits a certain block height, the precise date of each halving is not locked in.
The closer we get to the relevant block, the better idea we'll have on when the next halving will actually occur.
The 4th Bitcoin halving arrived on Friday 19 April 2024 (EST)/Saturday 20 April 2024 (AEST).
Bitcoin mining rewards are now at 3.125 BTC per block, down from 6.25 BTC.
Since this halving, only about 6.5% of the total supply of Bitcoin will be left to be mined.
This is the list of all Bitcoin halvings that have taken place so far:
The reduction in the number of Bitcoin produced every 10 minutes can bring about a supply shock, which can cause Bitcoin's price to rise.
Prices are determined by the law of supply and demand. When the supply of an asset decreases and the demand for that asset stays the same or increases, the asset's price increases.
Bitcoin was designed to be a deflationary asset like gold. Throughout history, the price of gold has risen. Theoretically, the same should be true for Bitcoin moving forward.
And Bitcoin has its biggest price spurts right after halvings — which is why savvy investors like to buy Bitcoin before halvings.
"Bitcoin was designed to have a deflationary, fixed supply in direct contrast to fiat currencies like the dollar, which are inflated over time by design, and therefore lose purchasing power over time."
Bitcoin experienced a dramatic price increase in the year following its first halving.
It climbed from US$12.20 on the day of the halving to over US$1,000 within the year.
Graphic sourceBitcoin's price also skyrocketed after the second halving.
It ran from US$663 on the day of the halving to almost US$20,000 within a year and a half.
Graphic sourceBitcoin's price action in the wake of the third Bitcoin halving wasn't much different.
Its price went from US$8,771 on the day of the halving to almost US$65,000 less than a year later.
Graphic sourceIt's too early to say what the long-term price impact will be for the fourth halving, but it's been a mixed bag so far. The price of Bitcoin has ranged between US$50,000 and $70,000.
All 21 million Bitcoin will be mined by the year 2140, so long as Bitcoin miners keep producing blocks every 10 minutes on average.
Once this occurs, miners will have to be incentivised by the fees they will receive for transaction fees on the Bitcoin blockchain.
Even now, Bitcoin miners not only receive block rewards for adding computational power to the network, but they also receive varying fees that users of the Bitcoin blockchain pay for transactions.
Some wonder whether the fees will be enough incentive for miners in the year 2140. It's difficult to predict whether they will, as this largely depends on how many people are using the Bitcoin network at that point in time.
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How we picked these
Tom Stelzer is a journalist with 6 years of experience covering personal finance, specialising in investment and cryptocurrency. With a Master of Media Arts and Production and a Bachelor of Communications in Journalism from the University of Technology Sydney, Tom provides expert analysis on digital assets and market trends, helping readers navigate the fast-evolving world of finance. See full bio
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