This FAQ explains how many bitcoins are left to be mined, the mechanics of Bitcoin's supply cap, and what happens when all bitcoins are mined. It covers everything from the current circulating supply to the impact of the halving events.

How many bitcoins are left to be mined?

As of early 2026, there are approximately 1.3 million bitcoins left to be mined.

This is because the total supply is capped at 21 million, and about 19.7 million have already been mined. The remaining bitcoins will be released gradually through block rewards, which decrease by half approximately every four years in an event known as the halving. The last bitcoin is expected to be mined around the year 2140.

What is the total supply of bitcoins?

The total supply of bitcoins is capped at 21 million coins.

This limit is hard-coded into Bitcoin's protocol by its pseudonymous creator, Satoshi Nakamoto. No more than 21 million bitcoins can ever exist, making Bitcoin a deflationary asset. The cap ensures scarcity, which is a fundamental aspect of Bitcoin's value proposition.

Why is there a limit of 21 million bitcoins?

The 21 million cap was chosen by Bitcoin's creator to create scarcity and prevent inflation.

Satoshi Nakamoto designed Bitcoin to mimic the properties of gold, which has a finite supply. By limiting the total number of bitcoins, the protocol ensures that the cryptocurrency cannot be devalued by creating more units arbitrarily. This fixed supply is a key distinction from fiat currencies, which can be printed indefinitely by central banks.

When will the last bitcoin be mined?

The last bitcoin is expected to be mined around the year 2140.

This estimate is based on the halving schedule, which reduces the block reward by 50% every 210,000 blocks (roughly four years). As the reward gets smaller, it takes longer to mine the remaining bitcoins. The final fraction of a bitcoin will be so small that it will take many years to produce the very last satoshi.

How many bitcoins have been mined so far?

As of early 2026, over 19.7 million bitcoins have been mined.

This means that about 93.8% of the total supply is already in circulation. The remaining ~6.2% will be mined over the next century or so. The exact number of mined bitcoins can be verified on the blockchain, and it increases with each new block that is added.

What happens when all bitcoins are mined?

When all bitcoins are mined, miners will no longer receive block rewards, but they will still earn transaction fees.

Miners validate transactions and secure the network. Currently, they are compensated with both new bitcoins and transaction fees. Once the supply is exhausted, transaction fees alone will incentivize miners to continue their work. This transition is expected to be gradual, as the block reward decreases over time, and fees are likely to increase as the network grows.

How does the Bitcoin halving affect the number of bitcoins left?

Bitcoin halving reduces the rate at which new bitcoins are created, slowing down the release of the remaining supply.

During a halving, the block reward is cut in half. For example, in 2024, the reward dropped from 6.25 to 3.125 bitcoins per block. This means that fewer new bitcoins are introduced into circulation, making the remaining supply last longer. Halvings occur every 210,000 blocks, and the next halving is expected in 2028.

Can the 21 million bitcoin limit be changed?

Changing the 21 million cap would require a consensus change, which is extremely difficult to achieve.

Bitcoin's protocol is decentralized, and any change to the supply cap would require a hard fork and the agreement of the majority of miners, nodes, and users. Because the cap is a core principle of Bitcoin's value, it is unlikely to be altered. A change would effectively create a new cryptocurrency, as it would deviate from the original design.

Final Thoughts

Understanding how many bitcoins are left is crucial for grasping Bitcoin's scarcity and long-term value. With roughly 1.3 million bitcoins remaining, the supply is finite, and the last coin won't be mined for over a century. This slow release ensures that Bitcoin remains deflationary and resistant to inflationary pressures.

As the block rewards decrease, miners will rely more on transaction fees, which could impact the economics of mining. However, the built-in scarcity is a key reason why many consider Bitcoin a store of value. Whether you're an investor or just curious, knowing the supply dynamics helps you appreciate Bitcoin's unique monetary policy.