Bitcoin Halving Explained: A Beginner’s Guide

Bitcoin has a built-in monetary policy that controls how new bitcoin enters circulation. One of its most important features is an event known as the Bitcoin halving.

Approximately every four years, the amount of new bitcoin miners can receive for producing a block is cut in half. The process continues over time as Bitcoin gradually approaches its maximum supply of nearly 21 million BTC.

But why does the halving happen, what does it mean for miners, and does it actually affect Bitcoin’s price?

This guide explains the Bitcoin halving, its history and why it matters.

What Is the Bitcoin Halving?

The Bitcoin halving is a programmed reduction in Bitcoin’s block subsidy.

When miners successfully produce a valid Bitcoin block, the block reward can consist of two components:

Newly created bitcoin — the block subsidy

Transaction fees — paid by users whose transactions are included in the block

Every 210,000 blocks, the block subsidy is reduced by 50%. Because Bitcoin targets roughly one block every 10 minutes on average, halvings occur approximately every four years.

Bitcoin began with a block subsidy of 50 BTC in 2009.

It has since fallen to:

25 BTC → 12.5 BTC → 6.25 BTC → 3.125 BTC

The April 2024 halving reduced the subsidy from 6.25 BTC to 3.125 BTC per block. The next halving will reduce it again to 1.5625 BTC.

How Does the Bitcoin Halving Work?

Bitcoin’s halving doesn’t depend on a company, government or individual deciding when to reduce issuance.

The schedule is part of Bitcoin’s protocol.

Once another 210,000-block interval is reached, the maximum block subsidy permitted by Bitcoin’s consensus rules is automatically reduced.

A simplified sequence looks like this:

1. Miners produce Bitcoin blocks

Miners use computing equipment to compete in Bitcoin’s proof-of-work system.

2. A successful miner produces a valid block

The block can contain transactions waiting to be confirmed.

3. The miner can collect the block reward

This consists of the block subsidy plus applicable transaction fees.

4. Bitcoin reaches another 210,000-block milestone

The permitted subsidy falls by half.

5. Bitcoin issuance slows

Fewer new bitcoins are created through mining for each subsequent block.

The cycle repeats until the subsidy eventually reaches zero.

Bitcoin Halving History

Bitcoin has experienced four halvings so far.

The next halving is expected around 2028, although its exact date cannot be known far in advance because halvings are determined by block height rather than a calendar date.

That distinction is important.

You may see websites showing a precise Bitcoin halving countdown. Those dates are estimates based on block production. If blocks are produced faster or slower than expected, the projected date changes.

Why Does Bitcoin Have Halvings?

The halving is part of the mechanism that controls Bitcoin’s issuance.

Unlike a monetary system in which a central authority can change the rate of currency creation, Bitcoin has protocol rules defining how new BTC is issued.

Every halving reduces the rate at which new bitcoin enters circulation.

This creates a declining issuance schedule:

50 BTC → 25 BTC → 12.5 BTC → 6.25 BTC → 3.125 BTC → 1.5625 BTC

…eventually approaching zero

This decreasing subsidy schedule is what allows Bitcoin’s total issuance to approach its maximum of nearly 21 million BTC.

Does the Halving Make Bitcoin Scarcer?

A halving does not suddenly remove half of the bitcoins already in circulation.

If you own 1 BTC before a halving, you still own 1 BTC afterward.

Instead, the halving reduces the rate at which new bitcoin is created.

For example:

Before the 2024 halving:

6.25 BTC per block

After the 2024 halving:

3.125 BTC per block

So the new supply generated through the block subsidy fell by 50%.

This is why you’ll often hear the halving discussed in relation to Bitcoin’s scarcity. The existing supply isn’t cut in half—the flow of newly issued BTC decreases.

What Does the Halving Mean for Bitcoin Miners?

Miners are directly affected because the block subsidy they can receive falls by half.

Suppose a miner successfully produced a block immediately before the 2024 halving.

The maximum subsidy was:

6.25 BTC

After the halving:

3.125 BTC

That’s a major reduction in subsidy revenue if everything else remains unchanged.

However, mining economics involve much more than the subsidy alone.

Profitability can depend on factors including:

• Bitcoin’s market price
• Mining difficulty
• Mining hardware efficiency
• Electricity costs
• Operational expenses
• Transaction fees

A miner that remains profitable under one set of conditions may become unprofitable when conditions change.

Less-efficient miners may therefore face greater pressure following a halving, while more efficient operations may be better positioned to absorb the reduction.

What Happens When All Bitcoin Is Mined?

Bitcoin’s block subsidy will continue declining through future halvings until it eventually reaches zero.

Under Bitcoin’s current rules, this is expected to occur around 2140, although projecting an exact date that far into the future isn’t practical.

At that point, miners would no longer receive newly created bitcoin as a subsidy.

That doesn’t mean mining is automatically supposed to stop.

Bitcoin miners can also earn transaction fees.

As the block subsidy declines, transaction fees become an increasingly important component of miner revenue. Bitcoin’s long-term security model therefore increasingly depends on fee revenue as issuance approaches zero.

Does the Bitcoin Halving Increase the Price?

You’ll frequently encounter claims such as:

“Bitcoin always goes up after the halving.”

That’s too simplistic.

The halving objectively reduces Bitcoin’s new issuance rate. It does not guarantee that demand will stay as is, or even increase. Since the price of Bitcoin is deremined by the demand to supply ratio, the price increase isn’t a guarantee.

Bitcoin’s price is affected by many variables, including:

• Investor demand
• Global liquidity
• Interest rates
• Regulation
• Institutional participation
• Market sentiment
• Economic conditions
• Crypto-specific events

Previous Bitcoin market cycles have experienced substantial price increases around broader halving cycles, but a small number of historical events cannot establish a reliable rule for future returns.

The better way to think about it is:

The halving changes Bitcoin’s supply issuance. The market determines what that change is worth.

When Will Be The Next Bitcoin Halving?

The next Bitcoin halving is expected at block 1,050,000, currently projected approximately for 2028.

At that point, the block subsidy will decrease from:

3.125 BTC → 1.5625 BTC

The exact date will depend on how quickly Bitcoin blocks are produced between now and then.

Why Does the Bitcoin Halving Matter?

The halving matters because it connects several fundamental characteristics of Bitcoin.

Predictable Issuance

Bitcoin’s protocol determines the rate at which new BTC can be created through mining.

Limited Supply

Repeated halvings gradually reduce issuance as Bitcoin approaches its maximum supply.

Mining Economics

Every halving changes the economics of receiving new BTC through mining.

Network Security

As subsidies decline over the long term, transaction fees become increasingly important to miner incentives.

Market Attention

Halvings attract significant attention from investors, miners and the broader crypto industry because they represent a predictable change in Bitcoin’s issuance.

Understanding the halving therefore helps explain not just Bitcoin’s supply, but also how mining and Bitcoin’s monetary system work together.

Explore Our Bitcoin Halving Guides

Learn why Bitcoin’s mining reward is cut in half and how the halving schedule works.

Explore every Bitcoin halving from 2012 onward and see how the block subsidy has changed.

Learn when the next halving is expected and why its exact date can change.

Understand how lower block subsidies affect miners, profitability and Bitcoin’s network.

Examine what happened around previous halvings—and why historical performance doesn’t guarantee future results.

Understand Bitcoin’s issuance schedule and how halvings gradually move the network toward its supply limit.

Continue Learning

Crypto Mining

Learn how miners use proof of work to produce blocks, process transactions and secure Bitcoin.

Blockchain

Understand the technology behind Bitcoin, including blocks, transactions, nodes and consensus.

Crypto ETFs

Learn how Bitcoin and other crypto assets can be accessed through exchange-traded investment products.

Bitcoin Halving FAQ

How often does Bitcoin halve?

Bitcoin’s block subsidy halves every 210,000 blocks, which works out to approximately once every four years.

When was the last Bitcoin halving?

The most recent halving occurred on April 20, 2024, at block 840,000. The block subsidy fell from 6.25 BTC to 3.125 BTC.

When is the next Bitcoin halving?

The next halving will occur at block 1,050,000, expected around 2028. The subsidy will decrease from 3.125 BTC to 1.5625 BTC.

Does Bitcoin halving reduce my BTC?

No. The halving doesn’t reduce existing Bitcoin balances. It reduces the amount of new BTC miners can receive through the block subsidy.

Does Bitcoin always rise after a halving?

No. A halving changes Bitcoin’s issuance schedule, but it does not guarantee a price increase. Bitcoin’s market price depends on both supply and demand as well as many broader market factors.

What happens to miners after a halving?

Miners receive a smaller block subsidy. Their economics then depend on factors including BTC’s price, transaction fees, mining difficulty, electricity costs and hardware efficiency.

When will the last bitcoin be mined?

Under Bitcoin’s current issuance rules, the block subsidy is expected to reach zero around 2140.

Understand Bitcoin Beyond the Price

The halving is only one part of Bitcoin. Learn how blockchain, mining, wallets and other technologies make crypto work.