Budget both sides of a Polygon PoS withdrawal

Budget for a Polygon PoS withdrawal by holding POL for the withdrawal transaction on Polygon and ETH for the final claim on Ethereum. The transfer has two paid steps: the first burns the Polygon version of the asset, and the second uses proof of that burn to release the corresponding asset on Ethereum. The checkpoint between them takes time, but it is not a third wallet fee.

Start by checking which asset and route the Portal offers. The ordinary PoS bridge flow applies to supported, mapped assets; a different route can have different steps and costs. The reverse trip also differs from depositing an ERC-20: this walkthrough of Polygon Bridge ERC-20 approvals and deposits explains the allowance step on the way in. For a withdrawal, check the Portal’s displayed route and wallet prompts instead of assuming that a deposit approval applies.

Which fees does a Polygon PoS withdrawal require?

A standard withdrawal requires gas on both networks, paid in their respective native tokens. First, you submit the withdrawal on Polygon PoS, where POL pays the transaction fee. This burns the bridged token representation and records the withdrawal in a Polygon block. Polygon validators later include that block in a checkpoint submitted to Ethereum. Once the checkpoint is available, the bridge can verify the burn and release the asset on Ethereum. You then submit the claim on Ethereum, where ETH pays the transaction fee.

Think of the checkpoint as a sealed batch receipt: it lets Ethereum verify that the Polygon-side burn happened before releasing funds. The wait is part of the bridge’s verification process, not a fee charged by the bridge. A standard withdrawal is therefore not priced as a fixed percentage of the amount sent. The two transaction fees depend on gas use and conditions on each network when the transactions are submitted.

How much POL and ETH should you set aside?

Use the Portal and your wallet’s transaction previews to estimate each fee close to the time you act. The Polygon estimate covers the burn transaction. The Ethereum estimate covers the claim, which happens later and may face different network conditions. Neither estimate is a reliable price for both steps at once.

Before starting, make sure your wallet has enough of each gas token to cover its step, with a margin above the displayed estimate. Gas prices can change while you wait for the checkpoint, and an Ethereum claim submitted during busier conditions can cost more than an earlier estimate. The exact fee depends on the transaction and the networks at submission, so a budget written in advance should leave room for movement rather than assume a fixed dollar cost.

• Check that the asset and route shown in the Portal match your intended withdrawal.
• Keep POL available in the sending wallet for the Polygon withdrawal transaction.
• Keep ETH available in the wallet that will claim on Ethereum; confirm that it is the same address if the Portal requires that address to complete the flow.
• Leave a buffer above both wallet estimates, and avoid starting if you need the asset on Ethereum immediately.

When does the withdrawal finish, and what should you plan for?

The withdrawal finishes after the Polygon transaction is checkpointed and the Ethereum claim is submitted. The time between those steps is not a guaranteed countdown: checkpoint timing and Ethereum transaction inclusion can vary. Treat the funds as unavailable on Ethereum until the claim succeeds, rather than budgeting around a precise arrival hour.

After initiating the withdrawal, save the transaction details and check its status in the Portal. When the interface marks the claim ready, connect to Ethereum, review the wallet’s fee estimate again, and submit the claim. If the estimate is higher than your remaining ETH balance, you may need to add ETH before proceeding. In practice, the most useful budget is two separate gas allowances—POL now and ETH later—plus enough time and fee headroom to finish the second step.