When will the final Bitcoin be mined? Full timeline explained

Explaining Bitcoin’s 21 Million Supply Cap

Satoshi Nakamoto, Bitcoin’s creator, built the cryptocurrency with a hard cap of 21 million coins. This rule is embedded in Bitcoin’s protocol and can only be changed if the entire network reaches consensus. This supply limit makes Bitcoin a deflationary asset, fundamentally different from traditional fiat currencies, which central banks can expand at will.

Bitcoin’s fixed supply draws a parallel to gold: just as Earth’s gold supply is finite, the number of bitcoins is capped. This scarcity helps preserve—and potentially grow—Bitcoin’s value over time, especially as demand increases.

New bitcoins enter circulation through mining. Miners use high-powered, specialized computers (ASIC miners) to solve complex mathematical problems, which both validate transactions and secure the network from attack. Every ten minutes, a miner adds a new block of transactions to the blockchain and receives newly issued bitcoins as a reward. Following the 2024 halving, miners earn 3.125 BTC per block.

The halving event is the main supply control mechanism. Every 210,000 blocks—roughly four years—the mining reward is automatically cut by half. When Bitcoin launched in January 2009, the reward was 50 BTC per block. The first halving in 2012 reduced it to 25 BTC, then to 12.5 BTC in 2016, 6.25 BTC in 2020, and 3.125 BTC in 2024. This pattern of exponential reduction continues until the reward reaches zero.

By early 2025, approximately 19.9 million bitcoins—about 94.8% of the maximum—will have been mined. About 1.5 million coins remain to be mined, a process that will stretch into the next century. Notably, due to rounding in Bitcoin’s code, the final supply will actually be about 20,999,999.98 BTC, just shy of 21 million.

When Will the Last Bitcoin Be Mined? The 2140 Outlook

The last bitcoin is projected to be mined around 2140. The reason for this long timeline is Bitcoin’s halving schedule, which exponentially slows new coin creation. The protocol calls for 32 halvings, each reducing block rewards further, until they approach zero.

By early 2025, miners will create about 900 new bitcoins daily (144 blocks × 6.25 BTC). After the next halving in 2028, this drops to 450 bitcoins per day. By 2032, just 225 bitcoins a day will be issued. Approaching 2140, new coins are created at a microscopic scale: by 2136, the block reward will be 0.00000001 BTC (one satoshi). The final halvings between 2136 and 2140 will distribute the last remaining satoshis—the smallest bitcoin units.

Importantly, the exact timing for the last bitcoin is not fixed and may vary. The Bitcoin network automatically adjusts mining difficulty every 2,016 blocks (about two weeks) to maintain an average ten-minute block time. Shifts in network computing power can speed up or slow down the process.

Though the final bitcoin won’t be mined until 2140, most of the supply enters circulation much sooner. By 2035, more than 99% of all bitcoins will be issued. Over the last 105 years of mining, only about 0.5% of the total will be produced—a phase of very slow issuance.

Projected Halving Timeline:

• 2028: reward drops to 1.5625 BTC per block
• 2032: falls to 0.78125 BTC per block
• 2036: down to 0.390625 BTC per block
• 2060: below 0.006 BTC per block
• 2136: 32nd and penultimate halving
• ~2140: final satoshi mined

Mining won’t stop in 2140. Miners will still process transactions and build blocks, but block rewards will be zero, and the network will be fully supported by transaction fees.

What Happens When All Bitcoins Are Mined?

When all 21 million bitcoins are mined around 2140, mining will continue—miners will rely solely on transaction fees paid by users. This transition has been part of Bitcoin’s design from the outset and is a central issue for the network’s long-term security and sustainability.

Transaction fees on the Bitcoin network work like an auction. When sending bitcoin, users can add a fee to incentivize miners to prioritize their transaction. During high network activity, users compete by paying higher fees for faster inclusion in blocks. When activity is low, fees are minimal.

Currently, transaction fees are a relatively small part of overall miner revenue, compared to block rewards. But with every halving, this balance shifts, and by 2140, fees will be miners’ only income.

The critical question: will transaction fees alone be enough to secure the Bitcoin network? The answer depends on several factors. If bitcoin’s price rises significantly due to its scarcity and growing demand, even small fees (in satoshis) could have high fiat value. For instance, a 1,000 satoshi fee would be $10 if bitcoin trades at $1 million.

Second, second-layer solutions such as the Lightning Network are essential. These systems allow millions of small, everyday transactions to take place off-chain, with periodic settlement on the main blockchain. This lets the base chain focus on high-value transfers and settlements between major participants, who are willing to pay higher fees.

Moving to a fee-only mining model will reshape the mining industry. Only the most efficient miners—using renewable energy, advanced equipment, and optimized operations—are likely to stay profitable. This could consolidate the sector, with large professional miners dominating smaller players.

Bitcoin’s economic model may evolve so that the network’s value and high-value transaction volume provide enough incentive for miners to maintain security. History shows the Bitcoin community adapts to changing circumstances, and the coming decades will test the resilience of this model.

Conclusion

Bitcoin’s journey to its final issuance around 2140 is a unique experiment in monetary engineering and economic theory. The 21 million supply cap creates a new form of digital scarcity, intensified by predictable, immutable halvings every four years.

Understanding this long-term issuance schedule is essential for everyone in the Bitcoin ecosystem. Investors can better assess Bitcoin’s long-term value and plan capital allocation. Miners must strategize for a future based on transaction fees. Developers need to focus on network scaling and optimizing fees.

Although over 94% of bitcoins are already in circulation, and by 2035 that number will exceed 99%, the final decades until 2140 will be a crucial test of a fee-based security model. The outcome will depend on bitcoin’s price, second-layer technology, mining hardware efficiency, and wider adoption as a store of value and settlement medium.

Bitcoin’s economic model has proven resilient, and the coming decades will reveal whether this decentralized system can reach its final issuance while preserving security and utility.

FAQ

When will the last bitcoin be mined?

The last bitcoin will likely be mined around 2140. Bitcoin’s protocol ensures a new block is mined every ten minutes on average, regardless of available computing power.

Why does Bitcoin have a 21 million coin cap?

Bitcoin’s 21 million limit prevents endless issuance and keeps money supply in check. The halving mechanism reduces mining rewards every four years, creating a deflationary model.

How does halving affect mining profitability?

Each halving cuts miners’ block rewards by half. Without a significant rise in bitcoin’s price, mining becomes less profitable, raising costs and potentially forcing some operations to close.

Will miners still earn profits after all bitcoins are mined?

Yes. Miners will earn income from transaction fees and blockchain services. Once bitcoin issuance ends, fees will be their main reward, supporting network profitability.

What happens after the last bitcoin is mined?

After the last bitcoin is mined in 2140, block rewards end and miners rely solely on transaction fees. Bitcoin’s deflationary design will increase scarcity, positioning it as digital gold and a store of value.

How many bitcoins have been mined to date?

As of January 2026, about 19.91 million bitcoins out of the total 21 million have been mined. Roughly 1.09 million remain, with final issuance expected around 2140.

What’s the connection between mining difficulty and the last bitcoin’s issuance schedule?

Mining difficulty rises over time and directly affects the timeline. Every four years, the halving event adjusts difficulty, ensuring the last bitcoin is issued in 2140.