Polygon Bridge moves tokens between Ethereum and Polygon PoS

Polygon Bridge moves tokens between Ethereum and Polygon PoS by locking them on one chain and releasing or creating the matching amount on the other. That lets you use supported assets on Polygon without making a separate market trade, but moving them back to Ethereum takes extra steps.

The name Polygon Bridge also appears at polygonbridge.dev. Before signing, check that the token and source and destination networks shown in your wallet match the transfer you intend to make.

How does Polygon Bridge move tokens?

A deposit from Ethereum locks the tokens in a bridge contract on Ethereum. The bridge then makes the same amount available on Polygon PoS as a pegged token, which represents the asset held on the other chain. It is a cross-chain transfer, not a swap: the bridge does not exchange one token for another.

Going back to Ethereum reverses that process. The Polygon version is burned, meaning it is removed from circulation, and the corresponding tokens are released on Ethereum. The bridge links balances across two separate blockchains; it does not merge them or make a Polygon token interchangeable with every token that has a similar name.

What do you need to bridge in either direction?

You need a wallet with the asset you want to move, enough native currency to pay fees on the source chain, and some on the destination chain if you plan to transact there. A native currency is the coin used to pay network fees. Ethereum transactions need ETH for gas; Polygon PoS transactions need POL. The bridge amount itself does not cover those fees.

Choose Ethereum and Polygon PoS as the two networks, select the token, and enter an amount. Read the wallet prompt before approving it. Depending on the token and transaction, an initial approval may be needed to let the bridge contract use your tokens, followed by a separate deposit transaction. Each on-chain step has its own fee.

• On an Ethereum-to-Polygon transfer, keep enough ETH for the Ethereum transaction and any required approval.
• On a Polygon-to-Ethereum transfer, keep enough POL to start the withdrawal.
• To finish a withdrawal, keep ETH available for the claim transaction on Ethereum.

The bridge’s transaction status can help you see whether a transfer is pending or ready for its next step. Check the receiving wallet and network before assuming the funds are missing; the tokens may have arrived on the other chain but not in the view currently selected in your wallet.

Why can withdrawals take longer than deposits?

A withdrawal from Polygon PoS to Ethereum usually involves a burn on Polygon, a wait for the network’s checkpoint process, and a claim on Ethereum. A checkpoint is a record of Polygon activity submitted to Ethereum. Once the withdrawal is ready, you must sign the claim transaction and pay its Ethereum fee before the tokens are released to your wallet.

That extra wait and second fee are the main trade-offs of the native route. For most readers who want the asset on Polygon PoS and can wait for the native withdrawal process when returning, it offers a direct link between the chains. Plan around the slower trip back, and keep gas funds on both networks so you can complete each step.