- Bitcoin’s circulating supply is about 20.05 million $BTC, or 95.47% of the 21 million cap, leaving roughly 950,000 $BTC to be issued.
- The next halving is expected in 2028, reducing the block reward from 3.125 $BTC to 1.5625 $BTC as issuance continues slowing toward 2140.
- After the final Bitcoin is mined, miners would continue securing the network but rely entirely on transaction fees, making future block-space demand central to sustainability.
Bitcoin’s approaching 2140 milestone sounds like the end of mining, yet it actually marks the end of new coin issuance. Circulating supply currently stands near 20.05 million $BTC, representing 95.47% of Bitcoin’s fixed 21 million maximum, with roughly 950,000 $BTC still waiting to enter circulation. The strange reality is that almost all Bitcoin already exists, but the final fraction may require more than a century to emerge. That extraordinary delay comes from a monetary schedule designed to slow issuance repeatedly rather than stop it through one sudden, dramatic event for miners worldwide over future decades.
Halvings and the path to 2140
Why the supply cap is central to Bitcoin’s design and what changes once new $BTC stops being minted.
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— Binance (@binance) July 21, 2026
Mining Continues After Issuance Ends
Bitcoin currently issues about 3.125 $BTC every 10 minutes, but that reward is programmed to fall by half approximately every four years. The next halving is expected in 2028, when the subsidy would decline to 1.5625 $BTC per block. A system built around predictable scarcity becomes increasingly difficult to visualize as rewards shrink toward tiny fractions. Around 90,995 blocks reportedly remain before that event, placing Bitcoin more than halfway through the present cycle, while one estimate identifies April 13, 2028, as a potential date after a countdown of roughly 631 days from the current schedule.
Once the final Bitcoin is mined around 2140, block rewards from newly created coins will disappear, but miners are not expected to vanish. Today, their revenue combines the block subsidy with transaction fees paid by users sending $BTC. The end of issuance therefore shifts Bitcoin’s security model rather than ending the mining process itself. Miners would continue validating blocks and protecting the network, but their income would depend entirely on fees. The unresolved question is whether transactions can provide compensation to cover costs and keep mining profitable without the subsidy that supported miners for generations.
Binance framed the transition as a consequence of Bitcoin’s supply cap, which remains central to the asset’s design. The remaining 950,000 $BTC will be distributed gradually as successive halvings reduce issuance, stretching the process across more than 100 years. Bitcoin’s final mining era is less a cliff than a long economic handover. Nothing dramatic must happen on the day the last fraction appears, yet the incentive structure will have completed its transformation. By then, miners will rely on fees paid by users sending $BTC, without newly issued coins supplementing revenue after block subsidies disappear permanently.
