When the Last Bitcoin Will Be Mined and What Happens Then

The last bitcoin will be mined around the year 2140, based on the rate at which new bitcoins enter circulation

Bitcoin's supply is capped at 21 million coins. The network releases new bitcoins through a process called mining, but the rate slows over time. Every four years, the number of new bitcoins miners receive is cut in half — an event called a halving. At the current pace, the final bitcoin should be mined sometime in 2140, though the exact date could shift by a few years depending on how fast miners solve the mathematical puzzles that release new coins.

This is not a guess or a projection that could change. The halving schedule is written into Bitcoin's code and has been since its creation in 2009. Miners cannot override it, and neither can any other participant in the network. The 21 million cap is the one hard limit Bitcoin was designed around.

Key Takeaways

• Bitcoin's total supply will never exceed 21 million coins, and the last one should be mined around 2140 based on the current halving schedule.
• Every four years, the reward miners receive for solving blocks is cut in half, which slows the rate new bitcoins enter circulation.
• The halving schedule is built into Bitcoin's code and cannot be changed by miners, developers, or any other group.
• After 2140, no new bitcoins will be created, but the network will continue to operate and process transactions.

How the halving schedule works

When Bitcoin launched in 2009, miners received 50 bitcoins for each block they successfully mined. In 2012, that reward dropped to 25 bitcoins. In 2016, it fell to 12.5 bitcoins. In 2020, it became 6.25 bitcoins. The next halving is scheduled for 2024, when the reward will drop to 3.125 bitcoins.

Each halving cuts the reward exactly in half. Because the reward keeps shrinking, the rate at which new bitcoins are created slows down over time. Early on, millions of bitcoins entered circulation each year. By 2140, the remaining bitcoins will be released so slowly that adding the final coins will take years. Eventually, the reward becomes so small that it rounds to zero in the network's accounting system, and no more bitcoins can be created.

The halving happens automatically every 210,000 blocks. Because miners typically solve a block every 10 minutes on average, one halving occurs roughly every four years. However, if miners become faster or slower at solving blocks, the time between halvings can shift slightly. This is why the 2140 date is an estimate rather than a certainty.

Why Bitcoin has a supply cap

Bitcoin's creator, known only by the pseudonym Satoshi Nakamoto, designed the 21 million cap to make Bitcoin scarce. Scarcity was meant to give the currency value and prevent inflation. Traditional currencies like the US dollar can be printed in unlimited quantities by central banks, which can reduce the value of each unit over time. Bitcoin cannot be printed. Once all 21 million coins exist, no more can ever be created.

This design choice is fundamental to how Bitcoin works. It is not a rule that could be changed later or a limit that might be lifted. Changing the cap would require altering Bitcoin's core code in a way that the majority of the network's participants would have to accept. Such a change would be extremely difficult to achieve and would likely split the network into two separate cryptocurrencies.

What happens to miners after 2140

After the last bitcoin is mined, miners will no longer receive newly created bitcoins as a reward. However, miners will still have a reason to keep the network running: transaction fees. When someone sends bitcoin to someone else, they can include a small fee that goes to the miner who processes that transaction. Today, miners earn far more from newly created bitcoins than from fees, but as the block reward shrinks, fees will become a larger part of their income.

By the time 2140 arrives, the expectation is that transaction fees alone will be enough to motivate miners to keep securing the network. If fees are too low to make mining profitable, fewer miners will participate, which could slow down transaction processing. However, Bitcoin's design assumes that demand for transactions will remain high enough to keep fees valuable.

The difference between total supply and circulating supply

Bitcoin's total supply is 21 million coins, but the circulating supply — the number of bitcoins actually in use or held by people — is lower. As of now, roughly 21 million bitcoins have been mined, but some have been lost permanently because their owners forgot passwords, threw away hard drives, or sent them to addresses that no one can access. These lost coins still count toward the 21 million cap, but they will never move again.

Additionally, some bitcoins are held in long-term storage and rarely traded. The actual number of bitcoins available for everyday use is smaller than the total that has been mined. This distinction matters if you are trying to understand Bitcoin's real scarcity or its price dynamics, because the coins that are lost or locked away do not participate in the market.

Why the 2140 date matters less than you might think

The year 2140 is so far in the future that it has little practical impact on Bitcoin today. By then, the block reward will be so tiny that it contributes almost nothing to the total supply. In fact, more than 99 percent of all bitcoins that will ever exist have already been mined. The remaining coins will trickle out over the next century, with each halving making the new supply smaller and smaller.

What matters more to Bitcoin's current value and function is the halving that happens every four years, not the final one in 2140. Each halving reduces the rate of new supply, which can affect price. Miners also adjust their behavior based on the upcoming halving, sometimes stockpiling coins before the reward drops. These near-term halvings shape Bitcoin's market dynamics far more than the distant end date.

Frequently Asked Questions

Can the 21 million bitcoin cap be changed?

Technically, Bitcoin's code could be modified to increase the cap, but doing so would require consensus from the network's participants — miners, developers, and node operators. Such a change would be extremely controversial and would likely cause the network to split. Most participants view the 21 million cap as essential to Bitcoin's value proposition, so a change is considered highly unlikely.

What happens to Bitcoin's price after all coins are mined?

No one can predict Bitcoin's price with certainty. However, the theory is that a fixed supply with ongoing demand should support value. After 2140, the only new bitcoins entering the market will be zero, so price movements would depend entirely on how many people want to buy or sell existing coins. Transaction fees would become the only reward for miners.

How many bitcoins have been mined so far?

The number changes constantly as new blocks are mined. As of early 2024, approximately 21 million bitcoins have been mined, meaning the vast majority of Bitcoin's total supply already exists. You can check the current number on blockchain tracking websites that update in real time.

Will Bitcoin stop working after 2140?

No. Bitcoin will continue to process transactions and operate normally after 2140. The only change is that miners will no longer receive newly created bitcoins. They will instead earn transaction fees from people sending bitcoin. The network's security and functionality do not depend on new bitcoins being created.

Why does Bitcoin halve every four years?

The halving schedule was built into Bitcoin's code from the start to create a predictable release of new coins. By cutting the reward in half every four years, Bitcoin's creator ensured that the supply would grow quickly at first and then slow down over time, eventually reaching the 21 million cap. This schedule is automatic and cannot be changed without rewriting Bitcoin's core rules.