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Zcash network upgrade · NU7

Ready for NU7?

Zcash's next network upgrade activates at block 3,543,405, planned for around 5 November 2026. Blocks get three times faster and old Sprout funds can no longer be spent normally. Here is what to check, depending on how you hold ZEC.

What do I need to do? Check a service

Every claim on this page links to its source.

Watch it happen

The Zcash chain, live

Last 40 minutes. Each square is a real block, placed at its timestamp. After NU7 they should come three times as often.

Latest block
#3,537,089
Average gap, last 100 blocks
79.2 s
Target
75 s now, 25 s after NU7

Before block 3,543,405

What do I need to do?

  • Before activation

    I keep ZEC in a wallet app

    Update the app before activation. The upgrade team expects NU7 not to affect wallets in any significant way, but each app still has to ship a version built for NU7, and one that hasn't may not be able to send after activation.

    An independent check found several apps and hardware wallets still waiting on an NU7 update a week before activation.

    Check your wallet on the NU7 readiness tracker

    An independent list: every line links to the issue, pull request or code it is based on.

    Source: NU7 Timeline (forum), NU7 readiness tracker (Cryppit)

  • Before activation

    I have old Sprout funds (a zc… address)

    Move them out before block 3,543,405. NU7 disables v4 transactions, the only kind that can spend Sprout, so Sprout funds left behind can't be spent normally after activation.

    An old zcashd wallet.dat can hold Sprout funds you have forgotten about. Check it now.

    Read the recovery thread

    Source: NU7 Timeline (forum), Zebra 7.0.0 release (Zcash Foundation)

  • I withdraw ZEC from exchanges

    Exchanges and custodial wallets have to upgrade too, and some may pause ZEC deposits and withdrawals while they do.

    Before you withdraw, check whether the service can pay a shielded address at all. After NU7, blocks come every 25 seconds, so a withdrawal should reach the chain sooner.

    Check a service on the board

    Source: Zebra 7.0.0 release (Zcash Foundation)

  • Before activation

    I run a node, indexer or explorer

    Upgrade before block 3,543,405: Zebra 7.0.0 or later. After activation, NU7 nodes disconnect older peers, and nodes that haven't upgraded follow a different chain.

    Zebra 7.0.0 migrates its database on first start, and a downgrade means a full resync, so back up first. Indexers and explorers may need changes too.

    Zebra 7.0.0 release notes

    Source: Zebra 7.0.0 release (Zcash Foundation), NU7 Timeline (forum)

In plain words

What NU7 changes

  1. 1

    Blocks every 25 seconds

    Down from 75, so the first confirmation comes about three times sooner. Daily issuance stays the same: block rewards are divided by three and the remaining halving intervals are tripled.

    Source: ZIP 218, Zebra 7.0.0 release (Zcash Foundation)

  2. 2

    Sprout is frozen

    v4 transactions are disabled and no new Sprout JoinSplits are allowed, so funds still in Sprout can no longer be spent normally.

    Source: NU7 Timeline (forum), Zebra 7.0.0 release (Zcash Foundation)

  3. 3

    Part of every fee is set aside

    60% of each block's transaction fees go into a reserve and miners keep 40%. From block 8,939,664, blocks start reissuing a small, predictable part of that reserve on top of the normal reward.

    Source: ZIP 235, ZIP 237, ZIP 259, Zebra 7.0.0 release (Zcash Foundation)

  4. 4

    More shielded capacity, lighter sync

    With 25-second blocks and new per-block limits on Orchard, Ironwood and Sapling activity, Orchard capacity goes from 2.9 to 6.6 transactions per second, and the worst-case spam a light wallet has to download falls by about 37%.

    Source: ZIP 218, Zebra 7.0.0 release (Zcash Foundation)

  5. 5

    What stays the same

    The four-year halving schedule and the 21 million ZEC supply cap. NU7 also adds no new transaction format; it switches off the old v4 one.

    Source: Zebra 7.0.0 release (Zcash Foundation), NU7 Timeline (forum)

Spread the word

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Wide share card: Zcash NU7 activates in about 5 d 12 h (6,316 blocks to go). Is your ZEC ready?
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Can I Shield and NU7

Before you withdraw after the upgrade

These services have been tested on mainnet. Every result here was recorded before NU7, and we plan to retest them after activation. Until then, treat them as the last known behaviour.

See the full board

Sources

Can I Shield is independent and not part of any upgrade team. Read 29 October 2026; if a source and this page disagree, the source wins.