What Happens When the Last Bitcoin Is Mined?

Key takeaways

• The last block subsidy is paid in block 6,929,999, and the 33rd halving at block 6,930,000 brings it to zero. At the ten-minute pace that arrives around the year 2140.
• The final supply is slightly under 21 million, exactly 20,999,999.9769 bitcoin, because the subsidy is paid in whole satoshis that round down.
• After that, miners earn only transaction fees. Blocks, the difficulty adjustment, the nodes that check every rule and everyone’s existing coins carry on as before.
• Whether fees alone can pay for enough mining to keep attacks expensive is an open question, argued both ways, and it is more than a century away from a full test.
• Nobody can know how Bitcoin will look in 2140, and this article makes no price or fee predictions.

When will the last bitcoin be mined?

The last new bitcoin is expected around the year 2140, and it is not a whole coin but a single satoshi, the smallest unit, paid in block 6,929,999. Bitcoin’s software starts the subsidy at 50 bitcoin, counted in satoshis, and shifts it down by one bit for every 210,000 blocks, which halves it and drops any fraction. After 32 halvings the subsidy is one satoshi. At the 33rd halving, block 6,930,000, it becomes zero and stays there.

The year comes from simple arithmetic. Block 6,930,000 times ten minutes is about 131.8 years after the first block in January 2009, which lands in 2140. That is an estimate, not a date in the rules, because the schedule is tied to block numbers and real block times vary. When Is the Next Bitcoin Halving? shows how such estimates are made and why they drift. The same holds for every halving, and the Halving and supply explorer gives the schedule for any block height.

How does issuance shrink on the way there?

Each halving cuts the subsidy in half, so each period issues half as many coins as the one before and most of the supply arrives early. The table below follows from the rules in Bitcoin’s software. It shows the subsidy that starts at each halving and how much of the final total exists by the end of that period.

Notice how the tail behaves. By the time the 10th halving arrives, more than 99.9 percent of the final total will already exist, and the last tenth of a percent is spread over roughly ninety years at the ten-minute pace. This table says nothing about how much exists today. How Many Bitcoin Are Left to Mine? covers that question and the live-figure caveats.

The rounding is also visible in the table. Through the 9th halving, every halved subsidy is a whole number of satoshis. At the 10th, half of 9,765,625 satoshis would be 4,882,812.5, and the software keeps 4,882,812. Dropped halves like this one, added up over the whole schedule, are why the total ends at 20,999,999.9769 and not at exactly 21 million.

What changes when the subsidy ends?

When the subsidy ends, no new bitcoin is created, and miners are paid only the fees attached to the transactions in their blocks. The first transaction in every block, the coinbase transaction, still exists, but it can claim nothing beyond the fees. The total supply stops growing and stays where it is.

The mining process itself looks the same. Miners still assemble candidate blocks, hash the header over and over, and send out the first block that meets the target. What Is Bitcoin Mining? walks through those steps. What changes is the size of the prize, and with it the amount miners can spend on electricity and machines. Bitcoin Fees Explained shows how fees are set today.

What stays the same?

Almost everything a user sees stays the same, because the subsidy is only one rule among many.

Block pace. The difficulty adjustment is independent of the subsidy. Every 2,016 blocks it resets the target, so blocks keep arriving about every ten minutes however much mining power is left. Bitcoin Hash Rate and Mining Difficulty Explained describes the mechanism.

The rules nodes enforce. Nodes reject a block that claims more than the subsidy plus the fees. After block 6,929,999 that means any block claiming new coins is invalid, so a miner cannot restart issuance on its own.

Your coins. Balances, keys and addresses are untouched, and sending bitcoin works as it did the day before. A fixed supply also does not stop use, because every bitcoin divides into 100 million satoshis.

Will fees alone be enough to secure Bitcoin?

Nobody knows, and it is the most debated long-term question about Bitcoin’s design. Miners’ income pays for electricity and machines, and the more they collectively spend, the more it costs to attack the network. As the subsidy shrinks, fees have to cover more of that income, or the cost of an attack could fall. This is not a sudden event in 2140. Every halving moves the balance a little.

As of October 2026, press coverage of mining revenue shows fees as a small part of what miners earn on a typical day, with the subsidy providing the rest. Mining-statistics sites show the current split.

Those who expect fees to cope start from the fact that block space is limited, so rising demand for it pushes up the price of a place in the next block. They add that layers built on top of Bitcoin, such as the Lightning Network, settle on the main chain, where opening and closing channels pays fees. And if income does drop, the least efficient miners switch off, difficulty falls, and the network keeps running with fewer, leaner operators.

Skeptics make a different case. Fee income is lumpy, with busy hours paying far more than quiet ones. A 2016 academic paper presented at the ACM Conference on Computer and Communications Security, “On the Instability of Bitcoin Without the Block Reward,” argued that when miners are paid mainly in fees, a block holding an unusually large pile of fees becomes a tempting target to rebuild, which could weaken the stability of the chain. Skeptics also note that layers which bundle many payments into one settlement could mean fewer fee-paying transactions, and that if less is spent on mining, attacks get cheaper.

Both sides rely on models of behavior that cannot be tested until the situation arrives. Proof of Work vs Proof of Stake compares how each design pays for its security.

Could the 21 million limit be changed to keep paying miners?

It could be changed only if a very broad share of node operators, miners and users agreed to run new rules, and no single person or company can decide it. Some developers have raised the idea of a small permanent block reward, often called tail emission, as a long-term question. Many Bitcoin users oppose it, because the fixed supply is central to the case for Bitcoin.

As of October 2026 this remains a topic of discussion and not a scheduled change, and the halving rule in the current Bitcoin Core software is unchanged. How Many Bitcoin Are Left to Mine? explains why changing the cap would be so contested.

What about coins that are lost by then?

Lost coins will stay lost, and with no new issuance arriving, nothing will offset them. Keys that are forgotten, drives that are thrown away and owners who die without a plan all remove coins from use permanently, because the network cannot tell them apart from coins that are simply being held. Estimates of the amount are guesses, as What Happens to Lost Bitcoin? explains. Because bitcoin divides into satoshis, a shrinking usable supply does not stop it from working as a unit of account, although what it means for value is an open debate.

None of this changes how bitcoin works for someone who holds it today. The end of issuance is a 2140 event, and the fee question builds slowly. For decisions about your own money, ask a qualified professional. If the basics are new to you, the Start Here path lists the core guides in order.

Where to go next

• Halving and supply explorer: the subsidy and scheduled supply for any year or block height.
• How Many Bitcoin Are Left to Mine? The 21 Million Cap Explained: why the total is just under 21 million.
• What Is Bitcoin Mining? How It Works, Step by Step: how miners earn the subsidy and fees today.
• What Is the Bitcoin Halving? Dates, History and What It Changes: the four halvings so far.