What the halving is
Each new Bitcoin block pays the miner who finds it a block subsidy of newly created bitcoin, plus the fees from the transactions inside it. The subsidy started at 50 BTC and halves every 210,000 blocks, which takes roughly four years.
- The subsidy went 50, 25, 12.5, 6.25 and then 3.125 BTC after the April 2024 halving at block 840,000.
- The next halving is due at block 1,050,000, expected around 2028. The exact date depends on how fast blocks are found.
Why supply stops near 21 million
Because the subsidy keeps halving, the total amount of bitcoin that can ever be created approaches, but never quite reaches, 21 million. Most of it has already been mined; each halving makes the remaining issuance smaller.
- The schedule is part of the software rules every node checks, so a miner cannot simply award itself more.
- Changing it would need the network to adopt new rules, which is why it is treated as fixed.
What it means for miners
A halving cuts a miner’s bitcoin income from new coins in half overnight, while electricity and equipment costs stay the same. Miners with expensive power or older, less efficient machines can become unprofitable and switch off.
- Every 2,016 blocks, about two weeks, the network adjusts difficulty so blocks keep arriving roughly every ten minutes. If miners leave, mining gets easier for those who stay.
- Transaction fees matter more after each halving, because they become a larger share of what a block pays.
What it does not promise
Halvings are often discussed alongside past price rises, but a smaller flow of new coins is only one input. Demand, interest rates, regulation and sentiment all move prices, and past cycles are a small sample.
- Treat claims that a halving guarantees a rally as opinion, not a rule.
- If you hold or mine bitcoin, plan for the reward cut itself, whatever the price does.
Try it in the Nodora Miner
Nodora Miner speeds the same idea up: a fixed reward is shared by every player’s share of the network, and it halves every 45 days within a 90-day season. You can watch what a halving does to a farm without any real money involved.
- Your share of each block depends on your hashrate compared with everyone else’s.
- Upgrading efficiency matters more after each halving, just as it does for real miners.
Your next steps.
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Sources & fact check
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- Bitcoin Wiki: controlled supply and the halving schedule
- Bitcoin developer guide: blocks, difficulty and transaction fees
- Bitcoin: A Peer-to-Peer Electronic Cash System (white paper)
Keep learning
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See a halving in the Nodora Miner →Curious about real cloud mining after a halving? Is GoMining profitable? →