When is the next Monero network upgrade?

The FCMP++ (Full-Chain Membership Proofs++) upgrade is in active development as of early 2026. No exact date has been announced yet — Monero doesn't set dates until code is ready, audited, and tested. Most community estimates point to late 2026 or early 2027. Follow the Monero Research Lab and GitHub for updates.

What is FCMP++ and why does it matter?

FCMP++ replaces ring signatures with a system where every transaction's anonymity set is the ENTIRE blockchain. Currently, each transaction hides among 16 decoys. With FCMP++, it hides among every output ever created — millions of possibilities instead of 16. This eliminates ring signature analysis attacks entirely and makes Monero's privacy mathematically optimal.

Do I need to do anything to prepare for the upgrade?

Just update your wallet software when the new version is released. Your XMR stays safe — you don't need to move funds. The upgrade is a hard fork, meaning the new version is incompatible with the old. All wallets (Monero GUI, Feather, Cake, Monerujo) will release updated versions before the fork. If you run a node, update it before the fork block height.

Will Monero's transaction size change with FCMP++?

Yes. FCMP++ transactions are expected to be slightly larger than current transactions, but the privacy improvement is massive. The exact size depends on the final implementation. Bulletproofs+ and other optimizations help offset the size increase.

Has FCMP++ been audited?

The cryptographic foundations have been reviewed by the Monero Research Lab and external cryptographers. A full security audit will be conducted before mainnet deployment — this is standard practice for all Monero protocol changes. Previous upgrades (Bulletproofs, CLSAG, RingCT) all underwent independent audits.

Monero Network Upgrade 2026 — FCMP++ and What's Coming

TL;DR: Monero's next major upgrade is FCMP++ (Full-Chain Membership Proofs). It replaces ring signatures with a system where every transaction's anonymity set is the entire blockchain — millions of outputs instead of 16 decoys. This is the biggest privacy upgrade in Monero's history. Timeline: active development, expected late 2026 or 2027.

Next Upgrade: FCMP++

Detail	Info
Name	FCMP++ (Full-Chain Membership Proofs++)
Status	Active Development
Expected	Late 2026 / Early 2027 (no fixed date)
Type	Hard Fork (consensus change)
Key Change	Ring signatures → full-chain membership proofs
Privacy Impact	Anonymity set: 16 → entire blockchain
User Action	Update wallet before fork block height

What FCMP++ Changes

Anonymity set: Currently, each transaction uses 16 decoys (1 real input + 15 fake ones). With FCMP++, the anonymity set becomes every output ever created — millions of possibilities. Statistical analysis of ring members becomes impossible.
Ring signature elimination: Ring signatures are replaced entirely. Known attack vectors (e.g., timing analysis, output age analysis) are eliminated.
Transaction size: Slightly larger proofs, but the privacy gain is orders of magnitude greater.
Backward compatibility: After the fork, old-style transactions can't be created. All wallet software must be updated.

For a deep dive into the cryptography, see our FCMP++ explainer.

Upgrade History

2014 — Launch

CryptoNote protocol. Basic ring signatures (ring size 3-7).

2017 — RingCT

RingCT hides transaction amounts. Mandatory for all transactions.

2018 — Bulletproofs

Replaces Borromean range proofs. ~80% reduction in transaction size.

2019 — RandomX

RandomX activated. CPU-only mining, ASIC-resistant.

2020 — CLSAG

Compact Linkable Spontaneous Anonymous Group signatures. ~25% smaller, ~20% faster than MLSAG.

2022 — Bulletproofs+, Ring 16

Bulletproofs+ (~6% smaller proofs). Ring size increased from 11 to 16. View tags for 40% faster wallet sync.

2026/2027 — FCMP++

Full-Chain Membership Proofs. Anonymity set = entire blockchain. The biggest upgrade ever.

How to Prepare

Wallet users: Update your wallet when the new version is released. Your seed phrase, addresses, and balance are unaffected. Download from official sources only.
Node operators: Update monerod before the fork block height. The old version will stop syncing after the fork.
Miners: Update your mining software and node. Mining the old chain after fork is wasted energy.
Traders: Exchanges will pause XMR deposits/withdrawals during the fork. P2P trading via Haveno may also pause briefly. Plan accordingly.

Why Monero Hard Forks

Monero uses scheduled hard forks to upgrade the protocol. Unlike Bitcoin's contentious fork history, Monero's forks are:

Community-driven: Changes are proposed, debated, and implemented by consensus.
Non-contentious: No chain splits have occurred. The community moves together.
Essential for privacy: Privacy technology advances. Ring signatures from 2014 aren't sufficient in 2026. Hard forks allow Monero to adopt the best available cryptography.
Anti-ASIC defense: The RandomX fork in 2019 was specifically to counter ASIC mining centralization.

What This Means for Traders

FCMP++ will make Monero's privacy mathematically optimal. For P2P traders, this means even stronger guarantees that your transactions can't be traced. The upgrade is seamless for users — just update your wallet when prompted.

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