This FAQ answers the most common questions about the total supply of Bitcoin, including how many exist, when the last one will be mined, and what happens after. It provides clear, fact-based answers to help you understand Bitcoin's scarcity.

How many bitcoins are there in existence right now?

As of early 2026, there are approximately 19.9 million bitcoins in existence, out of a maximum supply of 21 million.

This number increases by about 450 new bitcoins per day (since the April 2024 halving reduced the block reward to 3.125 BTC per block, with blocks mined roughly every 10 minutes). You can track the exact circulating supply on sites like CoinMarketCap or Blockchain.com.

What is the maximum number of bitcoins that can ever exist?

The maximum number of bitcoins that can ever exist is 21 million, a hard cap encoded in Bitcoin's protocol.

This limit ensures scarcity and is enforced by consensus rules. No more bitcoins can be created beyond this cap, making Bitcoin a deflationary asset. The last bitcoin will be mined around the year 2140, after which no new bitcoins will be issued.

When will the last bitcoin be mined?

The last bitcoin is expected to be mined in the year 2140, based on the halving schedule that reduces block rewards by 50% approximately every four years.

However, due to the limited decimal places (each bitcoin can be divided into 100 million satoshis), the reward will eventually become so small that it rounds to zero, effectively ending new issuance. After that, miners will rely on transaction fees for income.

How many bitcoins are left to be mined?

As of early 2026, there are roughly 1.1 million bitcoins left to be mined, since about 19.9 million are already in circulation.

This remaining supply will be gradually released over the next 114 years. The exact number decreases as new blocks are mined, and the rate slows down with each halving event.

Why is Bitcoin's supply limited to 21 million?

Bitcoin's 21 million cap is a deliberate design choice by its pseudonymous creator, Satoshi Nakamoto, to create a scarce digital asset that mimics the properties of gold.

Scarcity helps preserve value over time and protects against inflation. The limit is enforced by the protocol, meaning no one can change it without a consensus of the entire network. This predictability makes Bitcoin attractive as a store of value.

What happens when all bitcoins are mined?

When all 21 million bitcoins are mined, miners will no longer receive block rewards, and they will earn income solely from transaction fees.

This system is designed to be sustainable because fees are expected to increase as the network grows. In the meantime, miners still receive rewards, and the transition is gradual, giving the ecosystem time to adapt. Some experts predict that fees will be sufficient to keep mining profitable, though it's a topic of debate.

How many bitcoins are lost or inaccessible?

Estimates suggest that between 3 to 4 million bitcoins are lost or inaccessible, meaning they are in wallets whose private keys are lost or destroyed.

These lost coins reduce the effective circulating supply, making the remaining bitcoins even scarcer. However, because they are not truly removed from the blockchain, they still count toward the total supply cap. Lost coins can never be recovered, which adds to Bitcoin's deflationary pressure.

How does the rate of new bitcoin creation change over time?

The rate of new bitcoin creation halves approximately every four years in an event called the halving, reducing the block reward by 50%.

  • 2009-2012: 50 BTC per block
  • 2012-2016: 25 BTC per block
  • 2016-2020: 12.5 BTC per block
  • 2020-2024: 6.25 BTC per block
  • 2024-2028: 3.125 BTC per block

This decreasing issuance ensures that the total supply approaches 21 million asymptotically, with the last fraction of a bitcoin being mined in the next century.

Can the 21 million cap be changed?

No, the 21 million cap cannot be changed without a hard fork, which would require near-universal agreement from miners, nodes, and users.

Changing the cap would fundamentally alter Bitcoin's economics and is widely considered against its core principles. While there have been proposals to increase the supply, they have never gained traction. The cap is a central part of Bitcoin's identity and is enforced by consensus rules.

Final Thoughts

Bitcoin's supply is strictly limited to 21 million, with roughly 19.9 million already in existence as of 2026. The remaining bitcoins will be mined gradually over the next century, with the last coin expected around 2140.

This scarcity is one of Bitcoin's most defining features, driving its value proposition as digital gold. Understanding the supply dynamics helps investors and enthusiasts grasp why Bitcoin is often considered a hedge against inflation and a long-term store of value.

For the most up-to-date numbers, always refer to reliable blockchain explorers. As the network evolves, the economic model will continue to be a topic of discussion, but the 21 million cap remains unshakable.