How Many Bitcoins Are Left To Mine? Bitcoin Supply Explained

• Total supply: 21 million BTC
• Current block reward: 3.125 BTC per block, since the April 2024 halving
• Mined so far (May 2026): ~20.03 million BTC issued
• Left to mine: ~971,400 BTC, under 5% of total supply
• Next halving: Expected at block 1,050,000, around 2028, when the reward drops to 1.5625 BTC
• Final BTC expected: ~2140, when the subsidy reaches zero

About 971,400 BTC are left to mine as of May 2026. That figure comes from Blockchain.com's live Bitcoin circulating supply chart, which shows 20,028,600 BTC are now circulating in the market. Subtract that from the 21 million cap and less than one million BTC remains.

The number changes every time a miner adds a valid block, because each block currently releases 3.125 BTC as a subsidy on top of whatever transaction fees are included. Those steps are small and continuous, so the remaining count falls gradually rather than in daily batches.

Three terms help keep the numbers straight:

• Issued BTC is everything already created by valid blocks since Bitcoin launched in 2009.
• BTC left to mine is the future subsidy that hasn't been created yet.
• Lost or dormant BTC still counts as issued, even if nobody can spend it.

“How many bitcoins are left” is a supply question. “How many BTC are available to buy” is a liquidity question, and the two are not the same. If you're new to how Bitcoin works as a system, the Bitcoin guide covers the basics before the supply mechanics make full sense. Newly mined supply is only one part of what moves on exchanges on any given day.

Bitcoin supply gets confusing because the same question, phrased slightly differently, can have a different answer depending on which definition you're using. The table below separates the headline cap from what's been mined, what's still left, and what miners earn per block right now.

For price, market cap, and asset context, the Bitcoin asset page is the better starting point. For supply mechanics, the key idea is that the mining schedule is separate from exchange float or market demand. If you want to understand what is blockchain before going further, that guide covers how the ledger that tracks all of this actually works.

The remaining Bitcoin takes until roughly 2140 to mine because the block subsidy is cut in half every 210,000 blocks. That schedule front-loads issuance heavily in the early years, which is why over 19 million BTC were mined in Bitcoin's first decade while the last fraction will take more than a century.

Bitcoin's halving interval is set at 210,000 blocks in Bitcoin Core, and the subsidy calculation starts from 50 BTC before applying the halving count in GetBlockSubsidy. After the 2024 halving at block 840,000, the subsidy fell to 3.125 BTC per block.

The way the math compounds:

• Early reward eras issued large chunks of supply quickly, with 50 BTC per block from 2009 to 2012.
• Each 210,000-block era cuts the new subsidy in half, making each era's total issuance smaller than the last.
• Calendar dates are estimates because real block times vary around the 10-minute target.
• The 21 million cap is approached asymptotically rather than in a straight line.

The Bitcoin blockchain keeps advancing block by block while the BTC attached to each block keeps shrinking. The halving schedule is the core mechanism driving that. Picture a supply curve that rises steeply in the early years, then flattens into a long tail that runs to 2140. Bitcoin can be almost fully issued while more than a century of tiny subsidies still remain.

The table below shows how halving eras map to approximate years and block subsidies.

About 450 bitcoins are mined per day on average in the current subsidy era. The math is simple: 3.125 BTC per block, multiplied by roughly 144 blocks per day at the 10-minute target block time.

That figure is an average across a full day. Bitcoin targets a 10-minute block interval but doesn't enforce it rigidly, so some days produce more blocks and some produce fewer. The daily subsidy output moves in proportion.

Here's what drives the daily number:

• Current subsidy: 3.125 BTC per block.
• Target pace: one block approximately every 10 minutes.
• Daily average: about 144 blocks per day.
• Daily output: about 450 new BTC before the next halving.

After the next halving, expected at block 1,050,000, the subsidy drops to 1.5625 BTC per block. At the same block cadence, that cuts average daily new supply to about 225 BTC per day.

Transaction fees don't create new BTC. They transfer existing BTC from the user sending a transaction to the miner who includes it in a block. Fees add to miner revenue without touching total supply.

Mined Bitcoin and spendable Bitcoin are not the same thing. A coin can exist on-chain, count toward total supply, and still be permanently inaccessible if the private keys are gone. For a beginner, that distinction matters because it changes what “Bitcoin supply” actually represents.

Bitcoin does not reissue lost coins. A destroyed seed phrase, a lost hardware wallet, or BTC sent to an unspendable address all stay in the issued count forever. The ledger has no recovery mechanism.

No public source can prove the exact number of lost coins. Analysts estimate ranges using dormant wallet data, known burn addresses, early mining patterns, and behavioral research, but private-key loss leaves no on-chain signal.

That makes custody part of the supply story. Because lost BTC is never replaced, key management matters more than it would for an asset with a flexible supply. One question beginners often have is whether deliberately burned coins count as lost. For storage, cold hardware wallets covers the options most relevant to long-term BTC holders. If you're just getting started with storage options more broadly, crypto wallets for beginners is a better first stop.

Bitcoin is mined by participants who compete to add valid blocks, collect the subsidy, and earn transaction fees from users whose transactions they include. In practice, the mining landscape today is almost entirely industrial, ASIC-based, and organized through mining pools.

Individual miners do still participate, but almost never solo. The probability of a solo miner winning a block is proportional to their share of total network hashrate, and that share is tiny against global competition. Most individuals who mine join pools, which aggregate hashpower and distribute rewards proportionally. This guide to cryptocurrency mining explains how the process works from the ground up if this is your first time reading about it.

Modern Bitcoin mining depends on several layers working together:

• ASIC machines purpose-built for Bitcoin's SHA-256 proof-of-work algorithm, which are orders of magnitude more efficient than general-purpose hardware.
• Mining pools that combine hashpower from many contributors and pay out proportional shares.
• Low-cost power contracts and cooling infrastructure, since electricity is the primary operating cost.
• Fleet operators, both public and private, that manage thousands of machines at scale.
• Continuous hardware reinvestment as machines age and network difficulty adjusts upward.

When the last Bitcoin is mined, the block subsidy reaches zero and miners stop receiving newly created BTC. The network itself doesn't stop. Miners continue processing transactions and earning fees paid by users, but new BTC issuance ends entirely.

The shift is economic. Right now, miner revenue combines a subsidy, new BTC, and fees, existing BTC transferred from users. After the final subsidy era, fees carry all of that economic weight. Whether the fee market can sustain a strong security budget depends on transaction demand, average fee levels, miner operating costs, hardware efficiency, and what BTC is worth at the time. None of those variables are predictable a century out.

The main unresolved question is the security budget. High demand for Bitcoin block space could sustain miners on fees alone. Low demand could pressure revenue and, in theory, reduce the incentive to mine. That debate is active in the Bitcoin research community and has no settled answer.

The end of new issuance is a supply milestone. The network's ability to function past that point depends on whether fees can replace what the subsidy currently does.

Bitcoin's 21 million limit can technically be changed, but only if the people running the network choose to accept different consensus rules. In practice, that makes the cap one of the hardest commitments to alter in any monetary system.

No single miner, exchange, company, or developer can raise the cap unilaterally. A changed rule set would need to be adopted voluntarily by node operators and economic users. Anyone who rejects the change continues following the existing Bitcoin rules, and the two groups would effectively be on separate chains.

Several groups would each play a role in any attempted cap change:

• Developers could write and publish code with different rules.
• Node operators could refuse to run that code, keeping the existing cap enforced.
• Miners could produce blocks under either rule set, depending on which they run.
• Exchanges and custodians could decide which chain they recognize as BTC.
• Wallets and end users could choose which asset they treat as Bitcoin.

The real constraint on a cap change is social and economic: holders, exchanges, and users have strong incentives to reject any rule that dilutes the supply they already hold.