Bitcoin Halving Explained: What is Bitcoin Halving and How Does it Work?

One unique feature distinguishing Bitcoin from traditional FIAT currencies is its fixed supply. Unlike central banks that can print an indefinite amount of money, Bitcoin operates with a fixed total supply that cannot be altered. With only 21 million Bitcoins slated ever to exist, the current count stands at over 19.6 million, leaving less than 1.4 million to be mined. To manage the release of new coins, the Bitcoin protocol incorporates a process known as halving.

Halving is an important event in the Bitcoin ecosystem. It involves reducing the rewards earned by miners for validating transactions so things remain balanced as Bitcoin reaches close to its maximum supply of 21 million. In this article, we will dive into the details of what halving is, how it works, and why it is considered significant even in the crypto world.

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What is Bitcoin Halving?

Bitcoin halving is often regarded as the most significant event in the crypto world and is a process that is important to maintaining the integrity of the Bitcoin network. During halving, the reward given to Bitcoin miners for validating transactions is cut in half so the influx of new coins into the system can be controlled better.

Bitcoin operates on a Proof-of-Work (PoW) algorithm, and miners play a vital role within this consensus mechanism. These individuals utilize specialized computers to solve complex mathematical problems, thereby creating new blocks, releasing coins into circulation, and earning rewards for their efforts.

Initially, miners were rewarded 50 BTC for each block they successfully mined. However, thanks to a provision in the Bitcoin code known as “halving,” this reward has steadily decreased over time and will continue to do so in the future as well. Halving events occur approximately every four years, or after about 210,000 Bitcoin blocks have been mined.

The primary objective of Bitcoin halving, in addition to the fixed total supply of 21 million coins, is to regulate the rate at which new coins enter circulation. Once the cap of 21 million coins is reached, mining new Bitcoins will not be possible anymore. At this stage, miners will rely on transaction fees paid by network users to sustain their operations and keep the network functional. These fees will then serve as incentives for miners to continue participating in the network’s activities.

How Does Bitcoin Halving Work?

How Does Bitcoin Halving Work

Halving is ingrained into Bitcoin’s blockchain protocol and has been present in the system since its genesis block. This event is especially relevant for Proof-of-Work (PoW) based networks and is governed by just two lines of code. One line determines when a halving occurs, while the other establishes when the blockchain should stop the process. In the case of Bitcoin, the process will repeat 64 times before the halving ends, and all 21 million BTCs have been mined.

The most recent Bitcoin halving unfolded on May 12, 2020. The event unfolded in a flash as the blockchain reached the predetermined block target, slashing the block reward by half. The efficiency of this process is a testament to the quick and streamlined nature of the blockchain protocol.

The next Bitcoin halving is anticipated in April 2024, which is not far. This scheduled event will be similar to the last halving event, as the blockchain is designed to go through these halving events quickly when the targets are reached.

When Was the First Bitcoin Halving?

The first Bitcoin halving took place in November 2012, and it was considered a major event in cryptocurrency history. Following this milestone, subsequent halving events occurred in July 2016 and May 2020, each reducing the rewards to half as more Bitcoins got mined.

When Bitcoin was introduced in 2009, miners were rewarded with 50 BTC per block mined. However, with each halving event, this reward is halved. For instance, after the first halving, the mining reward decreased to 25 BTC per block.

The final halving is projected to occur in 2140, by which time the total supply of Bitcoin will reach its maximum of 21 million coins. At this point, mining rewards will solely consist of transaction fees, as no new coins will be generated.

Some experts anticipate a potential shift in miners’ behavior following each halving. As the block rewards decrease, miners may seek alternative sources of revenue, possibly affecting the network’s security and flow.

Bitcoin Halving History

We can learn about Bitcoin’s halving history by looking at this simple chart below:

DateHalving EventBlock NumberReward
03-01-2009Bitcoin Launch050 BTC
28-11-2012First Halving210,00025 BTC
09-07-2016Second Halving420,00012.5 BTC
11-05-2020Third Halving630,0006.25 BTC
April 2024
Fourth Halving740,0003.125 BTC

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How Bitcoin Halving 2024 Will Impact Miners?

How Bitcoin Halving 2024 Will Impact Miners

Following the upcoming Bitcoin Halving, miners will see a reduction in their block rewards and will only receive 3.125 BTC. This reward decrease could pose challenges for miners as electricity and hardware maintenance costs associated with Bitcoin mining are pretty high.

As the reward decreases miners might opt to exit the market. This shift could contribute to a more decentralized Bitcoin network. The overall hash rate, representing the computational power dedicated to mining, may decrease as miners either shut down their operations or migrate to other cryptocurrencies with similar proof-of-work algorithms.

Despite potential changes in miner participation, the fundamental processes of the Bitcoin network remain solid. The software is designed to adjust the difficulty of verifying transactions, which ensures a consistent rate of block creation and Bitcoin distribution. This mechanism helps maintain the integrity of the network and the steady flow of new bitcoins into circulation.

Beyond a mere reduction in miner earnings, the Bitcoin halving also has another purpose, which is to control Bitcoin’s inflation rate. In contrast to fiat currencies, Bitcoin’s carefully designed halving mechanism acts as a safeguard against inflation and makes it an asset that is more similar to gold than any currency.

Will Bitcoin Mining Still be Profitable After the Halving?

The profitability of Bitcoin mining post-halving depends on the Bitcoin price at that time. While halvings initially diminish miner profitability, the actual impact always depends on Bitcoin’s price. If the price rises substantially, miners may not experience a much reduction in profitability. However, without a decent price increase, mining could become viable only for large companies that can afford the necessary resources.

The halving acts as a leveling mechanism for Bitcoin. Some miners may cease operations due to reduced returns, but that will also reduce the mining difficulty level. This, in turn, makes it more accessible for new miners to enter the scene and keeps the process going.

What Happened to Bitcoin’s Price During the Last Halving?

The most recent Bitcoin halving occurred on May 11, 2020, reducing mining rewards by 50% to 6.25 bitcoins per block. This event had a significant impact on the price of cryptocurrency. About a month before the halving, on April 11, 2020, Bitcoin was valued at $6,877. As the halving approached, the price experienced an upward trend and was sitting at $8,821 at the time of the event.

Despite encountering fluctuations, Bitcoin’s price continued to rise over the following year, reaching $50,000 in February 2021. This surge in value could have been influenced by the reduced supply resulting from the halving, creating a bullish scenario for Bitcoin.

This price behavior is similar to patterns observed in previous halving events in 2012 and 2016, where the price continued to rise in the aftermath of the halving event. The data suggests that there is a correlation between halving events and positive price momentum for Bitcoin. However, there are no guarantees that the price will behave the same way during the coming halving event.


In conclusion, Bitcoin halving is an important event that reduces the rate of new Bitcoin issuance by half. This event will continue to take place until the projected limit of 21 million bitcoins is met around the year 2140. The rewards have diminished from 50 bitcoins per block in 2009 to 6.25 as of the recent halving on May 11, 2020. Beyond impacting miners, these halving events also influence the market dynamics and contribute to Bitcoin’s stability. The next halving event is not too far, and it will be interesting to see how the miners will react this time.

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