How Many Bitcoin Are There? The Complete BTC Supply Explained

Bitcoin has a hard cap of 21 million coins. That number is hardcoded into the protocol Satoshi Nakamoto released in 2008. No government can raise the ceiling. No committee can vote to print more. The fixed supply is one of the core reasons Bitcoin is compared to gold, and it is the single most important feature that separates Bitcoin from every fiat currency in existence.

As of early 2026, approximately 19.95 million Bitcoin have been mined. That leaves roughly 1.05 million still to be created. The remaining coins will be released gradually over the next century, with the final Bitcoin expected to be mined around the year 2140.

The 21 Million Cap Is Hardcoded and Cannot Be Changed

The 21 million limit was set by Satoshi Nakamoto when Bitcoin launched in January 2009. It is not a target or a guideline. It is an enforced mathematical rule built into the consensus code that every Bitcoin node runs. Changing it would require a coordinated agreement from the majority of the network to fork the protocol, and the entire economic value proposition of Bitcoin depends on that limit holding. In practical terms, the cap is permanent.

Each Bitcoin can be divided into 100 million smaller units called satoshis. That granularity means Bitcoin can support tiny transactions even as the price per coin rises. A satoshi at a $100,000 BTC price is worth one tenth of a US cent, which is plenty of resolution for any real-world use case.

Roughly 19.95 Million Have Been Mined, With 1.05 Million Left

The current state of Bitcoin's supply has reached an important milestone. More than 95% of all Bitcoin that will ever exist has already been mined. The 20 million mark is expected to be crossed around March 2026. From that point onward, every new Bitcoin issued will represent less than 5% of total supply.

New coins enter circulation through mining at a fixed rate of approximately 450 BTC per day, or about 164,000 per year. That issuance rate is set by Bitcoin's block reward, which currently sits at 3.125 BTC per block following the 2024 halving. New blocks are produced roughly every 10 minutes by the global network of miners competing to solve the cryptographic puzzle that secures the chain.

The Halving Cuts New Supply by 50% Every Four Years

Bitcoin's most distinctive supply feature is the halving. Approximately every four years, the block reward miners receive for adding a new block is cut in half. The schedule is fixed in the protocol and the cumulative effect is dramatic.

The halving is what makes Bitcoin's supply schedule deflationary. Each halving roughly halves the rate at which new coins enter circulation, while demand has historically continued to grow. Bitcoin's current annual inflation rate is around 1%, already below gold's roughly 1.6% annual supply growth. After the 2028 halving, Bitcoin's inflation rate will fall to approximately 0.4%, less than one quarter of gold's. No monetary asset in recorded human history has ever achieved that level of predictable scarcity.

Between 3 and 4 Million Bitcoin Are Lost Forever

The supply numbers above tell you how much Bitcoin has been mined. They do not tell you how much is actually usable. A meaningful share of all mined Bitcoin has been lost permanently through forgotten passwords, lost private keys, hard drive failures, deaths without recovery instructions, and sends to invalid addresses.

Industry estimates of permanently lost Bitcoin range from 2.3 million to 3.7 million BTC, with most credible analyses landing between 3 and 4 million. That puts the effective circulating supply closer to 16 million Bitcoin rather than the 19.95 million headline figure. The most well-known dormant holding belongs to Satoshi Nakamoto, who is estimated to own approximately 1 million BTC mined in the early days of the network. Those coins have not moved in over a decade and are widely assumed to be inaccessible or deliberately preserved.

The practical implication is that real scarcity is materially tighter than the supply schedule suggests. Every lost coin effectively raises the value of every remaining accessible coin, because the demand curve is met by a smaller pool of usable supply.

The Fixed Supply Is the Whole Point

Understanding Bitcoin's supply schedule is the closest thing to understanding why Bitcoin exists at all. Fiat currencies can be expanded at will by central banks. The US Federal Reserve created roughly $4 trillion in new dollars during the COVID pandemic alone. Government bonds, real estate and equities all have flexible supply curves that respond to demand. Bitcoin is the only major financial asset where the supply curve is a fixed mathematical function with no discretionary input.

That predictability is what underwrites the institutional thesis. Bitcoin treasury companies, ETF managers, sovereign wealth funds and central banks now allocate to Bitcoin specifically because the supply ceiling cannot be moved. The 21 million cap is the difference between Bitcoin and every other monetary innovation that has been tried over the past century.

After 2140, Miners Earn Only Transaction Fees

When the final Bitcoin is mined around 2140, the block subsidy reaches zero. The network does not shut down. Miners continue to validate transactions and produce blocks every 10 minutes, but their entire revenue comes from transaction fees paid by users rather than newly issued coins.

This transition will be slow and is already underway. As block rewards shrink through future halvings, transaction fees become a larger share of miner revenue with each cycle. By the time the last Bitcoin is mined, the network should have transitioned smoothly to a fee-based security model. Whether that model can sustain enough miner revenue to keep the network secure is one of the longest-running debates in Bitcoin economics, with most analysts believing transaction fee markets will scale enough to compensate.

For most readers, the 2140 question is academic. What matters today is that the supply schedule between now and then is fully known. Every Bitcoin that will ever exist is on a publicly verifiable timeline, with no surprises possible.