The last Bitcoin will be mined in the year 2140.
Bitcoin has a hard supply cap of 21 million coins, and new bitcoins are introduced into circulation through mining rewards, which halve approximately every four years in an event called the "halving." Because of this design, the rate at which new bitcoins are created slows down over time.
Right now (as of 2025), over 93% of all bitcoins have already been mined — but the final fraction will take more than a century to complete due to the halving schedule. This deflationary model is a big part of Bitcoin’s appeal as "digital gold" — a scarce, decentralized asset resistant to inflation.
