What the halving is
Bitcoin issues new coins to miners with every block, roughly every ten minutes. Every 210,000 blocks — about four years — the issuance is cut in half. The schedule is fixed in the protocol and has never been altered:
| Halving | Date | Block | Reward after | Annual issuance after (approx.) |
|---|---|---|---|---|
| Launch | January 2009 | 0 | 50 BTC | — |
| 1st | November 2012 | 210,000 | 25 BTC | ~12% of supply |
| 2nd | July 2016 | 420,000 | 12.5 BTC | ~4% |
| 3rd | May 2020 | 630,000 | 6.25 BTC | ~1.8% |
| 4th | April 2024 | 840,000 | 3.125 BTC | ~0.85% |
| 5th | expected spring 2028 | 1,050,000 | 1.5625 BTC | ~0.4% |
About 19.9 million of the 21 million maximum already exist. Each halving now removes a smaller absolute amount of new supply; the 2024 halving cut daily issuance from ~900 BTC to ~450.
What history shows — and does not prove
After each of the first three halvings, Bitcoin reached a new all-time high within 12–18 months, followed by a drawdown of 75–85%, followed by a long base. That pattern is the basis of the "four-year cycle" idea. Three observations are a pattern; they are not a law:
- The supply effect is shrinking. A halving in 2012 removed a large share of new supply relative to daily trading volume; in 2024 the removed amount is small against volumes and against the holdings that change hands for other reasons.
- The macro backdrop has coincided. 2012, 2016 and 2020 each fell in an easy-money period; the price cycle may owe as much to liquidity as to issuance.
- The sample is three. No statistician would call that a model.
Why 2024 was different
The 2024 halving was the first to occur after a structural change in demand: US spot Bitcoin ETFs launched in January 2024 and absorbed, within months, multiples of the new issuance. Bitcoin set a new all-time high before the halving — the first time that had happened — and then again in 2025, well above the 2021 peak. The cycle did not disappear, but its driver visibly shifted from miner selling pressure to institutional flows, corporate treasuries and macro liquidity. Analysts who model only the halving missed the timing; those who model flows did better.
The practical reading: the halving is a guaranteed supply event with an unguaranteed price effect, now one input among several rather than the dominant one.
What the 2028 halving will and will not do
Will: cut issuance to ~1.56 BTC per block; reduce miner revenue from subsidy by half overnight, forcing less efficient miners out and pushing the industry further toward fee revenue; attract a year of anticipatory commentary.
Will not: guarantee a price rise on any timescale; change anything about Bitcoin's security in the short run (difficulty adjusts); alter the maximum supply.
Swapping sensibly in a cyclical market
Volatility around cycle turns changes how swaps behave, in three concrete ways:
- Fees spike. When Bitcoin moves fast, the mempool fills and confirmation fees jump. A deposit sent with a low fee can wait hours, during which the floating rate moves. In volatile weeks, pay a priority fee for the deposit — the cost is small relative to the drift it prevents. The floating vs fixed guide explains the arithmetic.
- Spreads widen. Liquidity sources widen quotes during fast moves. The pair page's all-in cost against the market rate makes this visible; if it is unusually wide, waiting an hour often helps.
- Fast rails reduce exposure. Funding a swap from a stablecoin on TRON confirms in seconds; the rate you see is the rate you get. Funding from Bitcoin takes ~20 minutes at a normal fee. If you are rotating between Bitcoin and dollars around volatility, the BTC → USDT (TRC-20) direction is the slow one and USDT (TRC-20) → BTC the fast one.
Beyond mechanics, the boring advice holds: decide the allocation in calm periods, execute in pieces rather than at once, and do not let a halving countdown — or its aftermath — set the timing. An account-free swap makes each piece a two-minute action from your own wallet with no account to log into; that removes friction, which is useful, and removes any excuse to delay a planned move, which is more useful.
Frequently asked questions
When is the next halving? Around spring 2028, at block 1,050,000. The exact date depends on block times; block height is the reliable measure.
Does the halving affect other coins? Directly, no. Litecoin and Bitcoin Cash have their own halving schedules; most other assets have no equivalent. Indirectly, Bitcoin's cycle has historically pulled the whole market.
Is Bitcoin's issuance really fixed? The schedule is protocol consensus; changing it would require near-universal agreement of nodes, which has never come close to happening.
Should I buy before the halving? This page does not give investment advice. The halving is public information and is priced by a market that knows the date years ahead.
How do miners survive halvings? Efficiency gains, cheaper energy, and fee revenue. After each halving, hash rate has dipped briefly and then reached new highs.
BTC → USDT (TRC-20)
USDT (TRC-20) → BTC