Zcash's NU7 Upgrade Triples Block Speed
The privacy coin's 9th network upgrade cuts block times from 75 to 25 seconds and wires in a fee-burning mechanism—going live November 5.
By The crypto-money Desk
Zcash has a date. [1][2] The headline change: block times drop from 75 seconds to 25 seconds, tripling the rate at which the chain confirms transactions.
The per-block subsidy will be divided by an additional factor of 3 relative to the post-Blossom subsidy, so total ZEC issuance per unit of wall-clock time stays flat. [2] Faster blocks, same annual supply—the math is deliberate.
[1][2] That mechanism reissues burned fees rather than destroying them. Reissued supply flows back into circulation starting February 2031, once Zcash's existing halving schedule has run its course. [1]
The reissuance question was the thorniest part of NU7 polling. The community ultimately settled on preserving halvings intact, with reintroduced supply flowing back only after February 2031. [1][2] The compromise closed a months-long debate and cleared the path for the upgrade to proceed.
Privacy chains tend to move slowly by design—every change to a shielded protocol risks exposing what it was built to conceal. That caution shapes how communities like this one negotiate upgrades: through polling, multi-org alignment, and staged testnet windows rather than top-down roadmaps.
The rollout follows a tight three-stage calendar. Code completion was targeted for September 30, 2026. Testnet activation went live October 6, 2026. [2]
Wallet users should feel little friction: the forum post notes that new transaction formats are not part of NU7, and the changes should not affect wallets in any significant way. [2] The stack most exposed is infrastructure—full nodes, indexers, and block explorers will need to handle the new block cadence and the retirement of v4 transaction support. [2]
What NU7 represents, beneath the engineering checklist, is a community that has learned to disagree in public and still ship. The multi-org structure—five separate teams required to reach consensus—is slower than a single foundation calling the shots, but it produces upgrades that arrive with broad buy-in rather than fractured adoption.
If testnet runs clean through October, Zcash enters November with its fastest block time ever, a fee mechanism designed to sustain long-term issuance, and a cleaner transaction format to build on. [1][2] The privacy coin has been quieter than its rivals in recent cycles. NU7 is its argument that deliberate still means moving.
This divides the per-block subsidy by an additional factor of 3 relative to the post-Blossom subsidy, so that the total issuance per unit of wall clock time remains the same.Zcash Community Forum