How Zcash Mining Works

What is Zcash mining?

Zcash mining is the process of using computer hardware to solve a Proof-of-Work puzzle that lets a computer propose the next block on the Zcash blockchain — earning a share of newly issued ZEC in return. It's what turns Zcash from a database anyone could rewrite into a network nobody can, and it's still running today, open to anyone with compatible hardware, solo or through a mining pool.

How Zcash Proof of Work works

Every block a miner proposes has to satisfy a computationally hard puzzle before the rest of the network will accept it. That cost is the security model: rewriting Zcash's history would mean re-doing that work faster than the entire honest network combined — which gets harder as more mining power joins it. Mining applies equally to transparent and shielded activity: it orders and finalizes whichever valid transactions are waiting, without ever seeing inside a shielded one. For the fuller mechanics of how a candidate block actually gets assembled and accepted, see How Zcash Mining Works.

Equihash

Zcash's specific Proof-of-Work algorithm is Equihash — a memory-hard puzzle, meaning solving it efficiently takes large amounts of fast memory rather than pure computational speed. The goal at Zcash's 2016 launch was to keep mining accessible to ordinary GPUs for longer than a compute-only algorithm would. That worked for a while: Equihash-specific ASIC hardware has existed for several years now, and it — not general-purpose GPUs — is what competitive mining runs on today. Equihash secures the chain; it has nothing to do with how shielded transactions stay private, which is a separate system within the same protocol.

Mining rewards & issuance

Every mined block pays out a block subsidy — currently 1.5625 ZEC — split roughly 80% to the miner and 20% toward Zcash's on-chain development funding. That subsidy isn't fixed forever: it's cut roughly in half on a schedule called a halving, which is how Zcash's fixed 21 million ZEC max supply is reached gradually rather than all at once. Two halvings have happened so far, most recently in November 2024. For where things stand right now — calculated live from the current block height rather than a fixed date — see the Zcash Halving Countdown.

Mining and Zcash network security

Mining is what makes Zcash a functioning, decentralized network rather than a ledger someone could unilaterally rewrite. Every transaction — shielded or transparent — ultimately depends on miners continuing to secure the chain, and it remains the only mechanism through which new ZEC is created. You can see the result of that work directly: every confirmed block, and the difficulty it took to produce, is public on the Zcash Explorer.

Network upgrades and NU7

Zcash's mining parameters aren't permanently fixed — network upgrades can change block timing, subsidy accounting, or other consensus rules that affect miners directly. A proposed upgrade called NU7 is currently working through exactly that kind of change to block spacing and per-block subsidy. Rather than restate details here that can go stale the moment they change, the Zcash Network Upgrade Tracker is this site's live source for what's confirmed, what's targeted, and what's still just a proposal.