The next Bitcoin halving is expected around spring 2028, cutting the mining reward from 3.125 to 1.5625 BTC and slowing new supply. Here's what the halving actually does, why it matters for UK investors, and why past cycles guarantee nothing about the next.
Important Risk Warning
This is not financial advice. Cryptocurrency investments are highly volatile. The value of your investment can go down as well as up, and you could lose all the money you invest. Don't invest unless you're prepared to lose all the money you put in.
The next Bitcoin halving is expected around spring 2028, when the reward miners earn for adding a block will drop from 3.125 to 1.5625 BTC — halving the rate at which new bitcoins enter circulation. It's a scheduled part of Bitcoin's code that happens roughly every four years, and it's the mechanism behind Bitcoin's "digital scarcity" story. What it means for the price is the part nobody can honestly promise, and this isn't advice: past cycles are not a forecast.
Let me set expectations before we go further. Every halving generates a wave of "this time to the moon" content. The event is real and mechanically important. The confident price targets attached to it are not.
The halving is a pre-programmed event that cuts the block reward paid to Bitcoin miners in half. It occurs every 210,000 blocks — about every four years — and the next one is projected for around April 2028, though the exact date drifts because block times vary. After it, miners will receive 1.5625 BTC per block instead of the current 3.125.
This is baked into Bitcoin's design to enforce its 21-million coin cap. Each halving slows the creation of new coins until, sometime around 2140, the last fraction of a bitcoin is mined and issuance stops entirely. The 2028 event is the fifth in Bitcoin's history, following halvings in 2012, 2016, 2020 and 2024.
Because it's a supply shock. The halving cuts the flow of new bitcoins reaching the market roughly in half, and if demand holds steady or grows against a shrinking new supply, basic economics points toward upward pressure on price. That's the theory behind why halvings get so much attention.
Historically, the year or so after each halving has seen major bull runs. But — and this matters enormously — three or four data points is not a pattern you can bank on, correlation isn't causation, and the market increasingly "prices in" the halving well before it happens. The 2024 halving played out against a very different backdrop from 2012, with regulated products, institutional holders and far larger market size. Anyone claiming the 2028 halving guarantees a repeat is selling certainty that doesn't exist.
Not react to the halving as a trading signal, honestly. Trying to time entries and exits around a widely-anticipated, pre-scheduled event is exactly the kind of market timing that trips up even professionals. The halving is known to everyone; there's no edge in "front-running" something the whole market has had years to prepare for.
If anything, the halving is a reason to understand Bitcoin's supply mechanics, not to make a leveraged bet. The disciplined approaches we cover elsewhere still apply: only invest losable money, consider cost averaging rather than lump-sum timing, and hold for years. Our is Bitcoin a good investment piece lays out the risk framing, and how to buy Bitcoin in the UK covers the mechanics if you decide to.
No — the halving itself is not a taxable event for an ordinary holder. You don't dispose of anything when the network's reward schedule changes, so there's nothing to declare just because a halving happened. Your tax position only changes when you sell, swap or spend at a gain above the £3,000 annual exempt amount for 2026 (and whatever the allowance is in 2028).
One group it does affect directly: UK miners. A halving cuts mining rewards in half, changing the income miners receive — taxed as income at the sterling value when received — and squeezing profitability for smaller operations. Our HMRC Bitcoin mining tax guide covers that side. For everyone else, the halving is a supply story, not a tax one.
When exactly is the next Bitcoin halving? It's projected for around April 2028, but the precise date shifts because it's tied to block count (every 210,000 blocks) rather than the calendar. Block times vary, so estimates move by days or weeks.
Will Bitcoin's price go up after the 2028 halving? No one can guarantee it. Past halvings were followed by bull runs, but that's a handful of data points, the market anticipates the event, and conditions in 2028 will differ. Treat any specific prediction as speculation.
What happens to miners at the halving? Their block reward halves — from 3.125 to 1.5625 BTC in 2028 — cutting mining income and pressuring less efficient operations. In the UK, mining rewards are taxed as income when received.
Does the halving affect how many bitcoins exist? It doesn't reduce existing coins; it slows the creation of new ones. Each halving tightens new supply until the 21-million cap is reached around 2140, after which no new bitcoins are issued.
Should I buy Bitcoin before the halving? There's no proven edge in timing purchases around a pre-scheduled, widely-known event. If you invest, do it with losable money on a long horizon rather than as a bet on the halving specifically.
Understand the halving for what it is — a scheduled supply cut that reinforces Bitcoin's scarcity design — and ignore anyone using it to promise a price. If you hold or plan to, focus on the fundamentals that always apply: sensible sizing, self-custody for long-term holdings, and clean tax records. The 2028 halving will come and go on schedule. What the market does around it is nobody's to guarantee.
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