When Will Bitcoin Run Out? Three Different End Dates

New bitcoin issuance is expected to fade to zero around 2140, but bitcoin already held by people will not vanish on that date. The answer to “when will bitcoin run out” depends on what you mean: newly minted coins, coins available to purchase, or incentives for miners to process transactions. Those three ideas run on different clocks. The 21-million-BTC supply limit governs the first one; willing sellers and transaction fees influence the other two.

The issuance clock is written in block heights

Bitcoin creates new coins as a subsidy for a miner who adds a valid block. It began at 50 BTC per block and halves after every 210,000 blocks. Issuance declines rather than releasing every remaining coin suddenly. Bit.Fan’s explanation of what it means for bitcoin to run out separates the end of new issuance from the continued circulation of existing coins.

The Bitcoin.org halving schedule lists the April 2024 change at block 840,000, which reduced the subsidy to 3.125 BTC. It places the next change at block 1,050,000, when the subsidy would become 1.5625 BTC. Each successive cut makes the new-coin flow smaller. The total approaches 21 million BTC, and the subsidy eventually becomes zero because bitcoin has a smallest unit, the satoshi. You cannot keep halving a whole number of satoshis forever.

Bitcoin.org describes the final issuance period as occurring around the year 2140. “Around” is deliberate. Halvings are triggered by block heights, while their calendar dates depend on how quickly blocks arrive. Bitcoin targets roughly ten minutes per block on average, but actual blocks do not follow a wall-clock appointment. A future network may reach a particular height somewhat earlier or later than a neat four-year calendar would suggest.

The market clock has no final sale date

The end of a subsidy is not the end of bitcoin trading. Coins that were issued decades earlier can move from one address to another when a holder chooses to spend or sell them. If an exchange shows an available BTC balance after 2140, that can be existing bitcoin offered for sale; it need not be a newly mined coin. A limited flow of fresh supply and a market with no sellers are different things.

Imagine a rare book with a fixed print run. After printing stops, someone can still buy a copy from an owner. Its price depends on buyers and willing sellers. Bitcoin differs because one BTC can be divided into 100 million satoshis. People can transfer fractions even if a whole BTC is expensive. Divisibility allows small transaction sizes; it does not guarantee low prices or deep liquidity.

Some coins may also be permanently inaccessible because their owners lost the credentials needed to spend them. Such loss can reduce spendable supply without changing the protocol’s issuance schedule. An observer generally cannot know from an inactive address alone whether its coins are lost or merely held. Therefore “21 million created in the protocol” is not the same as “21 million available to buy at a quoted price.”

The miner-revenue clock changes gradually

Miners receive two kinds of compensation in a block: new coin subsidy and transaction fees from users. The Bitcoin developer guide to block transactions explains that the coinbase reward comprises the subsidy plus fees from transactions included in the block. Fees transfer existing coins; they do not raise the supply cap. As halving reduces subsidy, fees can become a larger share of miner revenue.

When the subsidy eventually reaches zero, a miner could still earn fees for including transactions. Whether those fees will support a given level of mining and security in the distant future depends on demand for block space, fee levels, equipment costs and competitive conditions. Nobody can know those economics more than a century in advance. The protocol offers a fee mechanism, but that mechanism is not a promise that every miner will remain profitable or that the network will have exactly today’s security budget.

The transition also happens over many halvings, not as a switch thrown in 2140. Miners already receive fees alongside subsidy, and each later halving changes the mix. Someone analyzing the network should ask how much revenue comes from each component at the relevant time. A combined “block reward” number alone may hide the difference between new BTC and previously existing BTC paid as fees.

Why a supply cap does not settle the price question

A finite supply can make bitcoin scarce, but scarcity alone cannot tell you what one BTC will cost. If demand falls or sellers need liquidity, a capped asset can decline in price. If demand rises while sellers hold, market prices may increase. Both cases are compatible with the same issuance schedule. The date of the last subsidy therefore does not provide a price forecast for 2140, next year or tomorrow.

A practical question hidden in “run out” is whether you can buy a small amount today. Check market depth, the seller’s offer, custody conditions and transaction costs. The halving schedule explains future creation; a current market quote tells you what is offered now.

Put the three clocks together

For new issuance, the answer is approximately 2140, with block height more precise than a calendar date. For available coins, there is no predetermined “sold out” date: existing bitcoin can keep changing hands as long as holders choose to transact. For mining, subsidy fades toward zero, while transaction fees remain a possible revenue source whose future adequacy is uncertain.

That is why “bitcoin runs out” is an imprecise shortcut. Specify which clock you mean before drawing conclusions. Bitcoin’s rules can end the creation of new units without deleting old ones, ending trade or forcing a particular price. The distinction turns a distant milestone into a useful explanation of how supply and markets actually differ.