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Bridging and cross-chain transfers

Moving an asset from one blockchain to another through a bridge, which typically locks the original and issues a representation on the destination chain. The IRS has not said whether a bridge is a taxable exchange.

What is Bridging and cross-chain transfers?

Moving an asset from one blockchain to another through a bridge, which typically locks the original and issues a representation on the destination chain. The IRS has not said whether a bridge is a taxable exchange.

Why it matters on your return

The conservative view treats a bridge like a swap; the common practitioner view treats it as a transfer of the same asset when the bridged token is redeemable one-for-one. Bridges also break the basis trail, so the transfer has to be matched on both sides.

Example

You bridge 10 ETH from Ethereum to Arbitrum. Under the transfer position nothing is taxed and basis carries over; the reconciliation shows 10 ETH leaving one address and arriving at another. The bridge fee paid in ETH is a small disposal.

Is bridging crypto taxable?

Unsettled. Most practitioners treat a one-for-one bridge as a non-taxable transfer and document it. Bridges that give you a different, non-redeemable token look more like an exchange.

Source: No IRS guidance as of September 2026

Last reviewed September 17, 2026. Tax rules change; confirm current law before acting.

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