The teams behind Zcash have decided to aim for November 5, 202, as the activation date for NU7, the network's next significant upgrade, on the mainnet. All of Zcash's development organizations have reached unanimous agreement on both the contents of upgrade package and the schedule for network upgrades, following a community sentiment collection conducted earlier this month. That unanimity carries weight because Zcash's engineering work is spread across several independent organizations, making the shared schedule the product of cross-team coordination rather than a single team's decision.

The upgrade is expected to introduce faster block production, modifications to transaction compatibility, and emerging strategies addressing network sustainability. Among its headline changes, NU7 will cut the target block interval from 75 seconds to 25 seconds, ensure that ZEC issuance halvings continue, and incorporate the Network Sustainability Mechanism. With the schedule now set, attention turns to implementing the upgrade's features and validating them on testnet.

According to Zcash developer Sean Bowe and the Zcash Community Forum, NU7 is scheduled to reach the official testnet on October 6, followed by a targeted mainnet activation on November 5. A final decision on the mainnet activation height is set for October 20, after the ecosystem has reviewed how NU7 performs on testnet.

Bowe announced the consensus in a post on X on September 17, 2026:

NU7 is coming! All of the Zcash development orgs have come to unanimous agreement about the contents and timeline of our next network upgrade, following the sentiment collection results earlier this week. Activation approximately November 5. Learn more:
— Sean Bowe (@ebfull) September 17, 2026 (source post)

25-Second Block Target Under ZIP-218

The most impactful technical change in NU7 is the change in block spacing from 75 seconds to 25 seconds, passed with ZIP-218. That threefold reduction is proposed to reduce transaction confirmation latency. Block interval is one of the most user-visible parameters in a proof-of-work network: it determines how often new blocks arrive and, in turn, how long a transaction typically waits to be considered confirmed. According to the proposal, the reduced interval will lead to a better experience for transactions that require one or two confirmations, as well as an increase in the bandwidth of consensus.

Faster Blocks Bring Infrastructure Changes

The change is not only a matter of timers. Because blocks will arrive more frequently, Zcash developers have also proposed the necessary changes in network parameters to ensure that time-based behavior remains similar after NU7. Since many chain operations are measured in blocks rather than seconds, keeping real-world timing stable requires recalibrating those block-based parameters whenever spacing changes. As one example, ZIP-218 suggests increasing the proof-of-work goldrush window from 17 to 102 blocks. Although the number of blocks rises, the smoothing time remains close to the intended wall-clock duration.

The faster schedule may also require a bit of help from full nodes, indexers, and block explorers. Ordinary wallets, however, would not see major modifications, as NU7 does not introduce new types of transactions, developers said.

Halving Schedule Maintained, Issuance to Return in 2031

Based on the newest community sentiment results, NU7 will also carry changes to the Network Sustainability Mechanism for Zcash. The existing ZEC halving structure is maintained, and issuance that was previously stopped will return in February 2031. The network upgrade will also remove transaction version 4.

Halving events govern the pace at which new ZEC enters circulation, which places them at the center of the network's issuance policy. The decision was based on discussions with several organizations and engineering teams within the Zcash ecosystem, such as the Zcash Foundation, Tachyon, Valar, ZODL, and Shielded Labs. The community sentiment collection took place earlier in September, and the reported results demonstrated that both the 25-second blocks and keeping the halving schedule were supported.

NU7 Timeline Moves Into Testing

Under the agreed schedule, the features are planned to be implemented and available on the testnet by September 30, which is the deadline for this release. The next milestone falls on October 6, when NU7 activates on the official Zcash testnet. Developers will then gain experience on the testnet before making the final decision on the mainnet activation height on October 20. In practical terms, how NU7 behaves on testnet between October 6 and October 20 is what will determine whether the November date stands.

If the current timeline holds, NU7 will activate on the Zcash mainnet on November 5, 2026.

Source: Crypto Ninjas