Emission Rate

Emission rate describes how quickly a blockchain protocol releases new units of its native asset into circulation, and it is fixed by the network's code rather than by any company or central bank. Because the rule lives in the protocol itself, anyone can calculate exactly how many coins will exist at a given block height or date, which is why plotting it produces the so-called emission curve.

Most designs follow one of a few patterns. Bitcoin uses a disinflationary schedule: the block reward paid to mining nodes is cut in half every 210,000 blocks, roughly every four years, falling from 50 BTC at launch to 3.125 BTC after the April 2024 halving, with the next reduction to 1.5625 BTC expected around 2028. Issuance keeps shrinking on this step curve until it approaches zero near Bitcoin's 21 million maximum supply, projected around the year 2140. Ethereum shows a different, more dynamic model: after its 2022 move to proof of stake, base issuance fell by roughly 90 percent and is now partly offset by transaction fees that get burned rather than paid out, so net emission drifts between mild inflation and brief deflation depending on network activity instead of following one fixed curve.

A steep or shrinking emission rate is often promoted as a scarcity signal, but it can also concentrate early rewards among early participants and, if issuance falls too fast, weaken the incentive to keep securing the network. That trade-off is why some projects add a small permanent "tail emission" instead of letting rewards hit zero. When comparing coins, the shape of the emission curve matters as much as the eventual supply cap, since two assets with identical caps can grow at very different speeds in the near term.