Zcash Accelerates Private Payments: Shorter Wait Times Come at a Cost of Modernization

The cryptocurrency Zcash (ZEC) has successfully implemented the NU7 technological upgrade, directly changing the user experience of private transactions. The network has reduced its target block time from more than one minute to approximately 25 seconds, seeking to transform its original technological advantage into a financial service suitable for everyday use. While ordinary users benefit from faster payment confirmations, the upgrade also affects the economics of mining and, for some investors, means that older assets are currently locked up indefinitely.

Faster Confirmations and Higher Capacity

The main benefit of the upgrade is the reduction in waiting times for so-called shielded transactions. Under the previous configuration, mining a single block took an average of 75 seconds. If a merchant or cryptocurrency exchange requires three confirmations before crediting funds, users now wait only approximately 1 minute and 15 seconds instead of just under four minutes. In terms of confirmation speed, private payments can therefore move closer to conventional payment transactions.

Alongside faster block production, developers have also addressed the problem of network congestion. The upgrade introduced stricter limits on the number of private operations within individual blocks. However, thanks to more frequent confirmations, the theoretical capacity for ordinary payments increased from 2.9 to 6.6 transactions per second. For users, this also brings a technical improvement, as the maximum daily data load required to synchronize a lightweight wallet has decreased from 271 to 169 megabytes.

Initial Results and Network Stability

The upgrade took place on November 6, 2026, without splitting the blockchain into competing chains. The network did not immediately reach the target interval of 25 seconds, as the protocol first had to automatically adjust mining difficulty. However, initial data collected after more than 11,000 blocks had been mined confirm that the average interval stabilized very close to the new target, at 25.4 seconds.

Faster blocks, however, come at a technical cost. Already during preliminary stress tests, the proportion of competing blocks that the network failed to accept, known as orphan blocks, increased from 1.57% to 3.43%. Shorter intervals leave less time for data distribution between nodes, meaning that the system's technical stability will require longer-term monitoring under real operating conditions.

Changes to Miner Rewards

The network is also introducing a new security funding mechanism called the Network Sustainability Mechanism (NSM). Previously, 100% of transaction fees went directly to miners. Under the new arrangement, miners retain 40%, while the remaining 60% is temporarily transferred to a publicly recorded reserve. These funds will only begin returning to circulation in the form of rewards from 2031 onward.

As the blockchain now produces three times as many blocks, the reward per mined block has decreased proportionally from 1.5625 to 0.5208 ZEC. The total daily issuance of new coins and the maximum supply of 21 million tokens remain unchanged. For now, the financial impact of deferred fees is minimal, but the mechanism will establish a direct link between the intensity of network usage and its long-term funding.

Discontinuation of the Old System and Frozen Capital

An objective cost of this modernization is the discontinuation of support for the old Sprout transaction format introduced in 2016. At the time of NU7 activation, approximately 12,224 ZEC tokens remained in this system, with a value of around USD 15 million. Under the network's current rules, their owners cannot move these assets even if they possess the corresponding private keys. Although the tokens have not been burned and developers are discussing possible recovery mechanisms, no solution has yet been approved.

The use of private transactions itself is also undergoing structural changes. According to available data, nearly 5 million ZEC were held in shielded pools at the end of October, with 84% held in the newest Ironwood pool. However, the growth of assets in this modern pool largely stems from internal transfers from older systems rather than a massive inflow of entirely new capital.

Summary

The NU7 upgrade has increased the performance of the Zcash network and simplified its architecture, but technological improvements alone do not guarantee an increase in the token's market price. Following the implementation of the new features, the price of ZEC had fallen below USD 1,220 by November 9, 2026. The network's technological readiness represents only half of the equation for success. The real test for Zcash will now be whether cryptocurrency wallet providers and exchanges update their systems quickly and whether shorter waiting times for private payments can attract actual users who incorporate shielded transactions into their everyday financial activities.

Warning: The content of this article is intended solely for informational and analytical purposes and does not constitute investment advice, a financial recommendation or a proposal to buy or sell any digital assets or securities.