Ethereum Glamsterdam Upgrade Explained: What Is ePBS and Why ETH Holders Should Care in 2026

Ethereum is about to go through its biggest change since the Merge — and most people holding ETH have no idea it's coming.

The upgrade is called Glamsterdam, and it's scheduled to hit Ethereum's mainnet around September 2026. Core developers are calling it the most significant protocol overhaul in Ethereum's history after the Merge, and for good reason: it touches how blocks are built, how transactions are processed, and how much you pay in gas fees.

If you've been watching ETH trade well below its October 2025 highs while Bitcoin gets all the headlines, Glamsterdam is one of the biggest reasons the smart money is still watching Ethereum closely. We covered institutional interest in Ethereum in our S&P Pantera Digital Asset Index breakdown — this upgrade is part of the same story.

What Is the Glamsterdam Upgrade?

Glamsterdam is Ethereum's next scheduled hard fork — a coordinated update where all nodes on the network upgrade to new rules at the same time. The name combines two things: Gloas (the Consensus Layer changes) and Amsterdam (the Execution Layer changes), named after a past Devconnect host city.

It follows two successful upgrades in 2025 — Pectra and Fusaka — and is built around two headline proposals that developers have been working toward for years:

• EIP-7732 — Enshrined Proposer-Builder Separation (ePBS)
• EIP-7928 — Block-Level Access Lists (BALs)

Together, these two changes aim to make Ethereum faster, fairer, and cheaper to use at its base layer.

What Is ePBS? (The Most Important Change)

Right now, over 80–90% of Ethereum blocks are built using external tools — specifically a system called MEV-Boost, where validators outsource block construction to third-party builders they have to trust to behave honestly. This works, but it creates centralization risks and means important parts of Ethereum's block production happen outside the actual protocol.

EIP-7732 fixes this by moving the whole process on-chain.

Under ePBS (Enshrined Proposer-Builder Separation), the proposer (validator) and the builder (who assembles transactions) are formally separated at the protocol level. No external relay needed, no trusting third parties — the block-building rules become part of Ethereum itself.

For regular users, the most tangible benefit is fairer transaction execution. MEV — Maximal Extractable Value — is the profit that block builders make by reordering or front-running your transactions. If you've ever had a swap on Uniswap execute at a worse price than expected, MEV is likely why. Research estimates that ePBS could reduce MEV extraction by up to 70%, which translates to more predictable prices when you trade, borrow, or provide liquidity on Ethereum.

What Are Block-Level Access Lists? (EIP-7928)

Today, Ethereum processes transactions one at a time, like a single checkout lane at a supermarket. EIP-7928 changes this by pre-announcing which accounts and storage slots a block will touch, allowing nodes to process non-conflicting transactions in parallel — like opening multiple checkout lanes simultaneously.

The target outcome: Ethereum's gas limit rises from 60 million today to 200 million per block, pushing throughput toward roughly 10,000 transactions per second — about 10 times what the network handles today. Gas fees for certain transaction types are projected to drop by up to 78% during periods of high demand.

For context on why gas fees matter to institutional investors, check our CLARITY Act breakdown — lower fees make Ethereum more viable for the real-world financial applications that regulation is now paving the way for.

When Is the Glamsterdam Mainnet Launch?

Here's the current timeline:

Important caveat: Ethereum developers have been clear that ePBS is proving more complex than previous upgrades. A slip into Q4 2026 is possible. The Ethereum Foundation's position is that getting ePBS right matters more than hitting a fixed date.

What Does Glamsterdam Mean for ETH Price?

No one can guarantee price movements, but here's the fundamental picture:

ETH closed three consecutive losing quarters from Q4 2025 through Q2 2026 — something that had never happened before in Ethereum's history. It currently trades well below its 2025 highs, which means a lot of bad news is arguably already priced in.

Glamsterdam changes the technical trajectory: lower fees, faster transactions, fairer block production, and — for the first time — Ethereum becomes directly competitive with Layer 2 networks on cost. The whale accumulation patterns we tracked in our on-chain analysis post suggest smart money is positioning ahead of these catalysts, not after them.

Do ETH Holders Need to Do Anything?

No action needed for regular holders. If you hold ETH in a wallet or on an exchange, your assets are not affected by the upgrade itself — you don't need to swap, bridge, or take any steps.

If you run a validator or node, you'll need to update both your consensus layer and execution layer clients before mainnet activation. Staking providers like Everstake and Lido have confirmed they will support the upgrade across their infrastructure.

Frequently Asked Questions

What is the Ethereum Glamsterdam upgrade? Glamsterdam is Ethereum's next scheduled hard fork, targeting mainnet launch around September 2026. It introduces ePBS (EIP-7732) and Block-Level Access Lists (EIP-7928), making block production fairer and enabling parallel transaction processing.

What is ePBS in simple terms? ePBS (Enshrined Proposer-Builder Separation) moves Ethereum's block-building process on-chain, removing the need for external relay networks like MEV-Boost. It reduces centralization and cuts MEV extraction by up to 70%, meaning fairer transaction prices for regular users.

Will Glamsterdam reduce Ethereum gas fees? Yes, EIP-7928's Block-Level Access Lists enable parallel transaction processing and target a gas limit increase from 60M to 200M per block. Gas fees for certain transaction types are projected to drop significantly during high-demand periods.

Do I need to do anything as an ETH holder? No. Regular ETH holders and stakers do not need to take any action. Only node operators and validators need to update their clients before mainnet activation.

When is Ethereum Glamsterdam mainnet? The current target is approximately September 16, 2026, following Sepolia testnet activation around August 3. A delay into Q4 2026 is possible given the complexity of the ePBS implementation.

Is Glamsterdam bullish for ETH price? Fundamentally yes — lower fees, higher throughput, and reduced MEV make Ethereum more competitive. However, market price depends on many factors beyond technical upgrades. Always do your own research before making investment decisions.

Related Reading on BlockHustle Crypto

• S&P Pantera Digital Asset Index: Why Bitcoin Got Left Out
• CLARITY Act 2026: What the New Crypto Regulation Means for Bitcoin
• Whale Accumulation: What Bitcoin & Solana On-Chain Data Is Showing

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Vishal Deshmukh is a cryptocurrency researcher, 

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Disclaimer: This article is for informational purposes only and does not constitute financial, investment, or trading advice. Cryptocurrency markets are volatile and carry risk. Always do your own research before making investment decisions.