A new Ethereum proposal would slash staking rewards to zero if the total amount of ETH staked hits 50% of the circulating supply. The yield cut wouldn't happen overnight — it would phase in gradually over 18 months after the proposal is activated.
The 50% threshold
The proposal sets a hard cap on staking participation. Once half of all ETH is locked up, rewards stop entirely. That's a sharp departure from the current model, where rewards scale down but never hit zero. The idea is to prevent the network from becoming too centralized — if too much ETH is staked, smaller validators get squeezed out and large pools dominate.
18-month phase-in
The reduction doesn't trigger instantly. After activation, the yield would decline steadily over 18 months until it reaches zero at the 50% threshold. That gives validators time to adjust — either by exiting or by accepting that their returns will eventually disappear. The gradual approach also avoids a sudden shock to the staking ecosystem.
Validator economics
For current stakers, the math changes. Right now, returns are around 3-4% annually. Under the proposal, if staking approaches 50%, those returns would dwindle to nothing. That could push some validators to exit, which would lower the staking ratio and potentially restart rewards. It's a self-balancing mechanism, but one that relies on rational economic behavior.
Next steps
The proposal is still in early discussion. It needs to go through the Ethereum improvement process, get feedback from developers and the community, and then be implemented in a future hard fork. No timeline has been set. The next major Ethereum upgrade, Pectra, is already being planned — but this proposal could land in a later one if it gains traction.
