Zcash developers have settled on block number 3,543,405 as the activation point for NU7, the network's next major protocol upgrade. Based on current block production, that height is projected to arrive around November 5th, though the date remains provisional pending final software integration.
Faster blocks, quicker confirmations
The centerpiece of NU7 is a reduction in target block time from 75 seconds to 25 seconds, effectively tripling block production speed. For an exchange requiring three confirmations before crediting a deposited $ZEC balance, this would shrink waiting times from roughly four minutes down to about 75 seconds. Developers say this could make Zcash more workable for everyday payments and transfers between exchanges, where speed often determines whether a cryptocurrency sees practical use beyond trading.
Managing fees and the supply schedule
Producing blocks three times faster raises an obvious question: won't that also speed up coin issuance? Zcash's developers addressed this by adjusting the per-block reward so the overall supply curve and halving schedule stay intact despite the faster cadence. Separately, NU7 will temporarily withhold 60% of transaction fees from circulation rather than paying them out immediately. According to the plan, this accumulated pool of $ZEC is intended to begin flowing to miners as a supplemental reward starting around February 2031, a mechanism designed to smooth incentives over the long term.
The end of the line for Sprout
NU7 will also permanently retire Sprout, Zcash's original shielded-transaction system from the network's early years, which has since been succeeded by more efficient privacy protocols. Any $ZEC still sitting in Sprout addresses risks becoming inaccessible once the upgrade activates. Users still holding funds on the legacy system are advised to move those balances to currently supported address types before the activation block is reached.
What still needs to happen
The November 5th estimate is not locked in. The chosen activation height still needs to be formally written into the deployment specification and built into node software that operators will run. NU7 has been live on Zcash's testnet since early October, giving developers time to catch bugs before the change reaches the mainnet, but final mainnet activation depends on that integration work being completed first.