The short answer: a halving cuts the number of new bitcoin minted per block in half, every 210,000 blocks — roughly every four years. There have been four: 2012, 2016, 2020 and 2024, taking the reward from 50 BTC down to today's 3.125. The fifth arrives at block 1,050,000 — 88,252 blocks from now (live number) — when the reward becomes 1.5625 BTC.
The complete record
| # | Date | Block | Reward before | Reward after | Supply issued at that point |
|---|---|---|---|---|---|
| — | Jan 3, 2009 | 0 (genesis) | — | 50 BTC | 0% |
| 1st | Nov 28, 2012 | 210,000 | 50 BTC | 25 BTC | 50% |
| 2nd | Jul 9, 2016 | 420,000 | 25 BTC | 12.5 BTC | 75% |
| 3rd | May 11, 2020 | 630,000 | 12.5 BTC | 6.25 BTC | 87.5% |
| 4th | Apr 20, 2024 | 840,000 | 6.25 BTC | 3.125 BTC | 93.75% |
| 5th | ~Spring 2028 (est.) | 1,050,000 | 3.125 BTC | 1.5625 BTC | 96.875% |
Dates are historical fact; the next date is an estimate from the ~10-minute block average. The block height is the only real trigger — which is why serious countdowns (like ours) count blocks, not days.
What a halving verifiably does
- Cuts new supply in half, overnight. Daily issuance dropped from ~7,200 BTC (2009) to ~450 BTC today; in 2028 it falls to ~225.
- Halves miner subsidy revenue, forcing efficiency and pushing the system one epoch closer to running on fees alone.
- Proves the schedule is real. Four times, an event that reprices an entire industry's revenue executed automatically, globally, with zero drama. No central bank has ever done anything comparable.
What a halving does not verifiably do is move the price — see the FAQ below for the honest version. The halvings' real monetary work is already mostly done: over 95% of all bitcoin exists. What remains is the ritual — a scheduled reminder, every four years, that nobody is in charge and the math doesn't negotiate.
Questions people actually ask
When is the next bitcoin halving?
At block 1,050,000, when the reward drops from 3.125 to 1.5625 BTC. Blocks average ~10 minutes, which currently projects to spring 2028 — but the trigger is the block height, not a calendar date. Our dashboard runs the live countdown computed from the actual chain.
Why do halvings exist at all?
They are how bitcoin issues its fixed supply: a predictable, front-loaded schedule that rewarded early risk, hard-coded in 2009 and enforced by every node. Halving every 210,000 blocks makes the 21M cap a mathematical consequence, not a promise.
Do halvings make the price go up?
Unknowable, and anyone certain is guessing. Past halvings preceded large rallies, but three data points prove nothing, markets may pre-price known events, and each cycle had huge confounding factors. What a halving verifiably does is cut new supply — what the market does with that is not physics.
Can miners or anyone skip a halving?
No. A block claiming the wrong subsidy is invalid and every node rejects it automatically — mining it would just burn electricity. The halving executes itself; there is no committee, no vote, no ceremony.