What Happens When Bitcoin 'Halves'?

Understanding the Halving Cycle

In our last article, we looked at Bitcoin mining, covering how miners are rewarded with newly created Bitcoin for each block they successfully mine. That reward doesn't stay fixed forever - it's cut in half at regular intervals, in an event known as “the halving.” It's one of the more closely watched moments in Bitcoin's entire schedule, for reasons worth understanding properly.

Halving, in one sentence

A Bitcoin halving is a scheduled event, built into the network's code, that cuts the reward miners receive for each new block exactly in half - occurring roughly every four years, or precisely every 210,000 blocks.

A quick history of halvings so far

Why is this built into Bitcoin at all?

Halving is the mechanism behind Bitcoin's fixed, predictable supply of 21 million coins. Rather than issuing new Bitcoin at a constant rate forever, the network deliberately slows issuance over time, on a schedule fixed in advance and enforced by the entire network - with the very last fraction of Bitcoin expected to be mined more than a century from now.

Does halving actually affect Bitcoin's price?

This is genuinely debated, and worth treating carefully rather than as settled fact. The basic argument is straightforward: reducing new supply entering the market, while demand stays the same or grows, should in theory support the price. Historically, previous halvings have indeed been followed by significant price increases over the following year or two.

But this needs real caveats. There have only been a handful of halvings in Bitcoin's entire history - far too small a sample to draw firm statistical conclusions from. Each halving also happened alongside other major developments, from growing adoption to broader macroeconomic conditions, making it genuinely hard to isolate the halving itself as the cause. And because block rewards are now a much smaller share of total circulating supply than in Bitcoin's early years, each halving's mechanical effect on overall supply growth is smaller than the last. Some analysts see the halving as a meaningful structural driver of price; others view the historical pattern as more likely tied to broader market cycles that simply happened to coincide with it. Reasonable people disagree, and nobody can say with confidence which view will hold going forward.

When is the next halving?

Based on the fixed, block-based schedule, the next halving is expected around 2028 - though the exact date can shift slightly, since block production times vary a little around their ten-minute average rather than running with perfect precision.

What should you actually take from this?

Halving is a real, predictable, and verifiable part of how Bitcoin works - unlike almost any other asset, its future supply schedule is known in advance, in full, by anyone who cares to check. What it means for the price going forward is far less certain, and shouldn't be treated as a reliable prediction of anything. Nothing in this article is financial advice, and anyone considering an investment should do their own research and consider speaking to a regulated financial adviser.

Next in knowledge base

In our next article, Who Controls Bitcoin? Understanding Decentralisation and Network Security, we'll look at the broader question of who, if anyone, is actually in charge.