The Bitcoin halving is a scheduled event, written into Bitcoin's software, that cuts the rate of new Bitcoin issuance in half every 210,000 blocks, or roughly every four years. The most recent halving took place in April 2024 and reduced the reward for each new block from 6.25 to 3.125 BTC.
For a finance team, the halving is best understood as a known change in supply growth. It is a fact about issuance, not a forecast about price.
What the Bitcoin halving is
New bitcoin enters circulation only one way: as a reward to the miner who adds each new block to the ledger. That reward has two parts:
- The block subsidy. Newly created bitcoin, fixed by the protocol.
- Transaction fees. Paid by users whose transactions are included in the block.
The halving applies only to the subsidy. Every 210,000 blocks, the subsidy is cut by 50%. Because blocks arrive on average every ten minutes, 210,000 blocks takes roughly four years.
No committee decides this. It happens automatically at a known block height, and every participant on the network can verify it.
Two points are worth making clear to a board early:
- The halving does not reduce anyone's existing holdings. It only changes how much new bitcoin is created from that point on.
- It does not change transaction fees directly. Fees are set by demand for space in each block, which rises and falls independently of the schedule.
The halving schedule so far
| Halving | Approximate date | Block subsidy after |
|---|---|---|
| Launch | January 2009 | 50 BTC |
| First | November 2012 | 25 BTC |
| Second | July 2016 | 12.5 BTC |
| Third | May 2020 | 6.25 BTC |
| Fourth | April 2024 | 3.125 BTC |
The next halving is expected around 2028, depending on how quickly blocks are produced. Because block times vary slightly, the exact date is only known as it approaches. The block height is known exactly.
Why the halving exists
The halving is how Bitcoin reaches its fixed supply cap of 21 million. Each cut makes new issuance smaller, so total supply approaches the cap more and more slowly. After enough halvings, the subsidy rounds down to zero, which is expected to happen around the year 2140.
By that point, miners will rely entirely on transaction fees. Our explainer on Bitcoin's 21 million supply cap covers the arithmetic.
For finance teams, the key idea is simple. Bitcoin's monetary policy is published, fixed and the same for everyone. That is very different from fiat currencies, whose supply can change with policy decisions.
What the halving means for miners
Mining is a business with real costs: hardware, electricity and facilities. When the subsidy halves, a miner's revenue in bitcoin from new issuance halves overnight, while costs do not.
Typical consequences include:
- Less efficient miners may switch off or sell hardware.
- Mining tends to consolidate towards operators with cheaper power.
- Transaction fees become a larger share of miner revenue over time.
- Miners may sell more of their bitcoin, or less, depending on their finances.
These effects matter to a treasurer mainly as background. Network security depends on miners being paid enough to keep operating, and the long-term shift from subsidy to fees is one of the open questions in Bitcoin's design.
Does the Bitcoin halving move the price?
This is the question most boards ask. The honest answer is that nobody knows in advance.
What can be said:
- The halving reduces the flow of new supply, which is a fact.
- Each halving is smaller in absolute terms than the last, so its effect on total supply growth shrinks.
- Past halvings have been followed by periods of both rising and falling prices, alongside many other factors such as interest rates, liquidity and new institutional demand.
- Because the date is known years ahead, markets have every opportunity to anticipate it.
Correlation across four events is not a basis for a treasury decision. We do not make price predictions, and a company should not time purchases around a halving. Our article on what drives the price of Bitcoin explains the wider set of forces.
CFO tip: if a board paper relies on the next halving to justify a purchase, rewrite it. The case for holding Bitcoin, if there is one, should stand regardless of where the halving cycle sits.
How finance teams should use this
The halving is useful in three practical ways:
- Board education. It is a clear, verifiable example of how Bitcoin's fixed supply works.
- Risk framing. Periods around halvings often attract attention and volatility. Plan liquidity and communication accordingly.
- Counterparty awareness. If the company deals with miners as suppliers, customers or counterparties, their finances may change after each halving.
It should not be used to set the timing or size of a purchase. Those decisions belong in a written Bitcoin treasury policy and a sizing framework such as how much Bitcoin a company should hold. Companies should take their own accounting, tax and legal advice. Definitions of terms such as block height and subsidy are in our glossary.
How The Bitcoin World helps
We help finance teams explain Bitcoin's supply mechanics to boards in plain language, and build treasury plans that do not depend on market timing. Where a company decides to buy, we design the execution plan and custody architecture. Execution, custody and settlement are carried out by licensed third-party institutions. See our board advisory work.