- On 20 April bitcoin’s fourth ‘halving’ took place: the reward for each block mined fell from 6.25 to 3.125 bitcoins.
- The protocol cuts that reward in half roughly every four years, so the issuance of new coins is predictable.
- For mining, revenue is cut in half overnight: only those with competitive energy and efficient equipment hold up.
On 20 April 2024 bitcoin’s fourth ‘halving’ took place: the reward the network pays for each block mined fell from 6.25 to 3.125 bitcoins. It was neither a surprise nor a last-minute decision, but the application of a protocol rule that activates roughly every four years and that anyone could consult well in advance. That predictability is precisely what distinguishes it from other economic changes that take those affected by surprise.
Although the term sounds technical, the idea is simple and affects many people: miners, who see their income reduced; investors, who follow the issuance of new coins; and companies that provide services to the industry. And, beyond bitcoin, it offers a clear example of how to manage a cut in income that is known to be coming.
How the halving works
The bitcoin network rewards miners with new bitcoins for each block they validate. A block is a set of transactions that is added to the chain after being checked, and those who devote computing power to that task receive the reward in return. It is, in essence, the mechanism that keeps the network running and protects it. Without the reward, there would be no economic incentive to devote equipment and electricity to that task.
Its protocol cuts that reward in half roughly every four years, which limits the issuance of new coins in a predictable way. That is why the halving does not depend on an authority making a decision: it is written into the rules from the start. That predictability is one of the features its supporters emphasise, although it says nothing about the future price. Anyone who interprets it as a promise of a rise would be attributing to it something the rule does not contain.
The impact on mining
For mining, each halving cuts revenue in half overnight, at least per block. Costs, by contrast, do not fall on their own: electricity, equipment, maintenance and financing are still there. The margin narrows at a stroke, and what was comfortably profitable before may cease to be. The profitability of each operation depends on factors such as the price of electricity, the efficiency of the machines and how they are financed.
Only operations with competitive energy and efficient equipment remain profitable: it is the moment that reveals who is well managed. Those who had calculated their costs realistically and prepared for this scenario face it calmly; those who relied on a thin margin have to renegotiate, optimise or leave. The halving thus works as a periodic stress test for the sector, forcing everyone to look at the numbers realistically.
A management lesson
Income that falls under a rule known in advance forces close attention to costs, energy and equipment. It is a lesson that applies outside this sector: any business with an income source subject to a foreseeable change, such as the end of a subsidy, an expiring contract or a regulated tariff, can apply the same reasoning. The essential thing is not to treat as unexpected what had long been on the calendar.
It is worth knowing at what level a business stays profitable before the cut arrives, calculating that threshold prudently and frequently reviewing the costs that can be controlled. Talking to the financial adviser to build scenarios with and without the change helps decide in good time whether to adjust the structure, seek financing or diversify. Acting early allows a choice between several options; reacting late usually leaves only one.
Rules known in advance do not surprise those who prepare.
This article is general information. It is not legal, tax or investment advice, and it does not take anyone’s particular circumstances into account.
