Zcash NU7 Targets 25-Second Blocks, With Activation Still Pending

Published: 2026-10-22 16:12:40 |

Zcash developers have selected block 3,543,405, currently expected around November 5, as the target for the NU7 mainnet upgrade. The date is not final: developers still need to add the activation height to deployment specifications, complete compatible software releases and prepare network operators. Engineering work includes syncing fixes and development of the Zebra node release. NU7 would reduce Zcash’s target block interval from 75 seconds to 25 seconds, potentially speeding up transaction confirmations. It also introduces a Network Sustainability Mechanism that temporarily removes 60% of transaction fees from circulation, with the accumulated funds scheduled to be gradually reissued through miner rewards from around February 2031. The existing supply cap and halving schedule would remain unchanged. The NU7 upgrade will disable version 4 transactions used to spend funds in the legacy Sprout pool. Holders with Sprout funds must move them to a supported pool before activation or they may become unspendable under the new rules. Version 5 and version 6 transactions remain valid. NU7 is a technical and compatibility upgrade, not a wholesale change to Zcash’s privacy architecture.

Neutral

The upgrade is primarily a technical and compatibility change, so its direct price impact on ZEC is uncertain. Faster target block times could improve the user experience and support confidence in the network, which may be viewed positively over the longer term. However, this benefit is not guaranteed to translate into higher demand or token prices. In the short term, traders may focus on whether the activation date is confirmed, whether compatible releases are ready, and whether node operators can upgrade smoothly. Delays, implementation problems or disruption to network services could weigh on sentiment; a smooth activation could provide modest support. The fee mechanism temporarily removes 60% of transaction fees from circulation, but the funds are scheduled for gradual reissuance through miner rewards, so it does not amount to a permanent supply reduction. The unchanged supply cap and halving schedule, alongside the required migration of legacy Sprout funds, leave the overall market signal mixed rather than clearly bullish or bearish.