Bitcoin halving: Why it happens and how it affects pricing

When the pseudonymous Satoshi Nakamoto launched Bitcoin (BTC), they built scarcity into this digital asset’s design. Similar to metals like gold – and distinct from fiat currencies – BTC has a limited supply that plays a major role in its value proposition.

Not only is BTC’s supply pre-set at 21 million coins, Nakamoto built in a predictable inflation schedule so node operators and investors know what to expect for future issuance. These encoded events, called Bitcoin halvings, happen at preprogrammed intervals and have the potential to drive up the cryptocurrency’s value.

If you’re curious about the dynamics of BTC’s price, we’ll explain what halving is and how it affects the BTC supply.

What’s Bitcoin halving?

Bitcoin halvings are preprogrammed events that automatically reduce the amount of BTC entering circulation. Even though BTC’s total supply will never exceed 21 million tokens, the rate at which new coins enter the market depends on the latest inflation rate.

Nodes like miners, who verify transactions on Bitcoin’s blockchain, have a chance to claim newly minted BTC as block rewards. But after a halving occurs, miners get 50% of the rewards they previously received.

When Bitcoin launched in 2009, a node operator could earn 50 new coins as a block reward. In 2012, however, the first halving event brought this issuance down to 25 BTC. Then the reward decreased to 12.5 BTC in 2016, 6.25 BTC in 2020, and 3.125 BTC in 2024.

How does Bitcoin halving affect the crypto market?

In their 2008 Bitcoin whitepaper, Satoshi Nakamoto wrote that BTC’s issuance was deliberately influenced by gold mining. Halving events play a major role in mimicking that precious metal’s scarcity in a digital format.

The gradual reduction sets expectations for future rewards, and it ensures that the inflation rate steadily declines to 0%. Halving also has a strong psychological impact on market participants, so it often correlates with adjustments to BTC’s market cap and price.

Let’s look closer at the main impacts of BTC halving.

Creating scarcity

Halving creates scarcity by slowing the rate at which new Bitcoins are released onto the blockchain. Fewer coins enter the market with each block reward, which means there’s less BTC available for investors.

Controlling inflation

Inflation measures the increase in supply of a currency, including digital assets like BTC. The halving event controls inflation by restricting the amount of new coins released to miners over time, while priming market participants for a future with 0% inflation.

Influencing digital economics

Traditional economics relies on supply versus demand to explain how asset prices rise and fall. When there’s more demand and less supply, the price should go up (and vice versa). Since halvings act as a supply control mechanism, they directly influence BTC’s economics. Traders often gauge this impact by watching BTC’s market cap, which shows the current value of this asset relative to its supply.

Affecting price

Halving events bring a feeling of consistency to the world’s largest blockchain, but this issuance schedule impacts price in unpredictable ways. In theory, halvings make each BTC in circulation more valuable by reducing the supply of new coins. But many other factors affect how cryptocurrency prices rise and fall, such as miner behavior and the latest macroeconomic conditions.

How does a Bitcoin halving work?

The halving mechanism is part of Bitcoin’s code, so it goes into effect automatically. After 210,000 blocks are created, the protocol halves the current reward rate and keeps it in place for another 210,000 blocks. When they verify transaction batches after the halving, miners get 50% fewer new coins as block rewards.​

Because halving is part of Bitcoin's decentralized protocol, no individual can change it. The only way to alter halving would be with a radical modification to Bitcoin’s underlying structure. While that’s technically possible, altering or deleting halving events would require broad consensus among core developers and node operators, and it could result in a completely new blockchain via a hard fork.

When is the next Bitcoin halving?

Since it generally takes 10 minutes for a block confirmation to complete, there should be 2,100,000 minutes – or about 4 years – between halving events. However, block rewards don’t always go out exactly 10 minutes apart. As nodes join or leave the Bitcoin network, confirmation times can speed up or slow down slightly.

Bitcoin adjusts for these fluctuations in hashrate by automatically scanning the network every 2,016 blocks (or about 2 weeks) to make difficulty adjustments. If confirmation speeds are too fast, the blockchain will increase difficulty so it’s harder for nodes to confirm transactions. When confirmation speeds are too slow, the algorithm decreases difficulty to speed up validations.

Since BTC has the most-watched halving event in crypto, you can find many online timers, such as CoinGecko’s BTC Halving Countdown, that offer precise estimates for the next halving. At time of writing, it’s likely that the next BTC halving will occur in April 2028.

Keep in mind that some other digital assets use their own halving issuance schedules to create scarcity and control inflation. For example, Litecoin (LTC) and Bitcoin Cash (BCH) have halving events every four years.

Should you invest in BTC during a halving?

There’s a theory in crypto investing circles known as the four-year cycle, which revolves around Bitcoin halving. According to this model, the supply shock from halving events tends to send the crypto market into a bull run for a few months or years afterward. Then BTC crashes into a multi-year bear market, and the whole pattern repeats at the next halving.

For example, in 2012 the price per BTC on halving day was $12, but that rose to about $1,000 one year later. In 2016, BTC went from about $650 on halving to roughly $2,500 a year later, and it had an even more dramatic one-year surge from about $8,700 to over $55,000 after the 2020 halving.

But just because the four-year cycle theory suggests that buying into a halving event can be profitable, there isn’t enough data to confirm that this pattern will always play out. Rather than buying BTC solely because of a halving event, research all aspects of this cryptocurrency – including its tokenomics metrics, goals, and significant news – to make informed decisions about when you’re comfortable investing in BTC and how it fits into your crypto portfolio.

How many Bitcoin halvings are left?

Bitcoin will have 32 halving events throughout its lifetime, and four have already passed since the network’s 2009 launch. That means there are still 28 halving events left, scheduled to take place over about 112 years. So if block times stay consistent at 10 minutes (and if Bitcoin itself survives that long), it’s likely the final halving will take place around 2140.

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Although there’s no telling how a halving will affect BTC’s price, everyone knows when these events will happen and how they’ll change the token’s issuance rate. The halving system makes it easier for miners and market participants to anticipate BTC’s liquidity rather than guessing how much will appear on the blockchain. This kind of transparency is crucial in all aspects of crypto investing, so you can stay safe and invest wisely in volatile markets.

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Disclaimer: This post is informational only and is not intended as tax advice. For tax advice, please consult a tax professional.