Zcash activated its NU7 network upgrade on a public testnet on October 5, 2026, with a mainnet activation decision scheduled for October 20 and a November 5 target, according to FXStreet. NU7 cuts block times from 75 seconds to 25 seconds and reroutes a share of transaction fees toward future mining rewards.
What is the NU7 upgrade?
NU7 is Zcash’s next network upgrade, and FXStreet reported that it went live on the public testnet on Monday, October 5. Its headline change is a faster block time, cut from 75 seconds to 25 seconds, which FXStreet described as roughly a threefold increase in transaction speed. The upgrade also introduces a fee-redirection mechanism and new limits on shielded actions designed to reduce network spam. The testnet phase lets developers and node operators validate the changes before any mainnet switch. Zcash is a privacy-focused network that lets users shield transaction details, so changes to block cadence, fees and shielded-action limits touch both its usability and its economic security.
When could NU7 reach mainnet?
According to FXStreet, the mainnet activation decision is scheduled for October 20, with a November 5 target for the upgrade to take effect on the live network. That two-step cadence, a testnet run followed by a go or no-go decision, mirrors how most chains stage consensus-level changes. As with any such timeline, the dates are contingent on the testnet proceeding without critical issues, and readers should confirm against official Zcash channels before relying on them.
How does the faster block time change Zcash?
Shorter block times generally mean transactions confirm more quickly, which FXStreet framed as a meaningful throughput improvement for the privacy-focused network. By moving from 75-second to 25-second blocks, Zcash would produce blocks about three times as often, reducing the typical wait for an initial confirmation. The change is one of several in NU7 aimed at making the network more usable and at tightening its economic model.
What is the Network Sustainability Mechanism?
FXStreet reported that NU7 introduces a Network Sustainability Mechanism that sends 60% of transaction fees toward future rewards, rather than having them consumed immediately. The design is intended to help fund the network’s long-term security budget rather than relying solely on block subsidies. The upgrade additionally limits shielded actions to curb spam, and, on mainnet activation, would retire older Sprout v4 transactions, which FXStreet cautioned would leave any funds still sitting in that legacy pool unspendable, a migration risk holders using very old shielded addresses should note well before the November 5 target. Taken together, the fee change and the spam limits are aimed at keeping the privacy network economically durable as activity grows.
How have ZEC price and the Grayscale ETF behaved?
Zcash entered October after a powerful late-summer rally. DailyCoin reported that ZEC surged past $1,500 in September, reaching multi-year highs amid attention from investors including Paradigm and anticipation of NU7. By early October, FXStreet put ZEC around $1,340, down roughly 23% from a September 27 peak near $1,697, as the market cooled. DailyCoin reported that the rally had been dramatic, with ZEC climbing roughly 215% from around $470 in mid-August, and that moves through round-number levels triggered waves of short liquidations on the way up, including about $34 million in short positions wiped out on September 4 alone as the token cleared $1,050. On the fund side, FXStreet reported that the Grayscale Zcash ETF saw an outflow of about $3.57 million on Monday after three sessions of more than $25 million in outflows the prior week totaling $93.56 million, a reversal after a September stretch of heavy inflows that included about $98.21 million in a single week and marked a fourth consecutive week of inflows at the time. Other coverage noted that the pace of ETF outflows had begun to ease as NU7 entered its testnet phase, suggesting the upgrade itself was a focal point for traders. DailyCoin also linked part of the September rally to interest from investors including the trading firm Paradigm.
What are the risks to watch?
The clearest near-term risks are execution risks around the upgrade itself: a delayed or contested October 20 decision, testnet issues, and the Sprout v4 retirement that could strand funds in the legacy pool if holders do not migrate. Price and ETF flows have been volatile, swinging from a sharp rally to a double-digit pullback within weeks, which KuCoin tied in part to the NU7 upgrade vote and broader sentiment. This article is informational and does not contain price predictions or investment advice. Zcash holders can follow the project’s official governance and release channels for the confirmed mainnet decision. Because NU7 is a consensus-level change, it requires coordinated adoption by miners, node operators and wallet providers, and the October 20 checkpoint is essentially a readiness decision based on how the testnet performs. Users holding ZEC in modern shielded or transparent addresses are not expected to need to act, but those with funds in the legacy Sprout pool should plan to move them before activation to avoid the unspendable-funds scenario FXStreet described.
Sources
FXStreet – Zcash Price Forecast: NU7 upgrade sets the stage for ZEC to resume its rally (Oct 6, 2026)
DailyCoin – Zcash Price Hits 10-Year High as Paradigm and NU7 Upgrade Boost Rally
KuCoin – Zcash Price Hits 8-Year High: How the NU7 Upgrade Vote Could Shape ZEC’s Future
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Sarah Williams is STnews's Blockchain Editor, leading coverage of blockchain technology, DeFi investigations, exchange analysis and crypto regulation. Her reporting adheres to STnews's editorial standards — primary-sourced, cited, and non-advisory.
Conflicts of interest
I hold no positions in any cryptocurrency mentioned in my coverage. All investment-related content is reviewed by senior editors before publication. I am not compensated by any project I cover.
