A wrapped token represents another asset one for one, issued so the original can be used somewhere it otherwise cannot. WBTC represents bitcoin on Ethereum. WETH represents ether in a form that behaves like a standard ERC-20 token. The wrapper is redeemable: hand back the wrapped token and you get the original asset.
The mechanism differs by asset, and that difference is what matters for tax.
Wrapping ether is a contract deposit. You send ETH to the WETH contract, it holds the ETH and mints you an equal amount of WETH, and the process reverses on demand. No third party holds anything.
Wrapping bitcoin is not the same. BTC cannot move to Ethereum, so a custodian holds the bitcoin and WBTC is minted against it. You end up holding a token issued by someone else, backed by reserves you do not control.
Bridged assets sit between the two, depending on whether the bridge locks the original in a contract or hands it to a custodian. Worth checking before assuming a wrap and a bridge transfer are the same thing. Liquid staking tokens are sometimes described as wrapped ETH, and they are a different animal again, because they accrue staking rewards.
Protocols are built around token standards. ETH predates ERC-20 and does not implement it, so most DeFi contracts want WETH instead. Bitcoin holders wrap to use BTC as collateral, supply it to a pool or lend it out without selling. In both cases the point is access rather than exposure. The holding has not changed.
Unresolved. The IRS has issued no guidance on wrapping, and there is no ruling stating that it is or is not a disposal.
The conservative reading treats a wrap as an exchange of one property for another under section 1001, taxable on the difference between the value received and your basis in the asset given up. The competing reading is that a redeemable one for one wrapper leaves your economic position where it was, so nothing has been disposed of, and basis and holding period carry into the wrapped token.
Where you land tends to follow the mechanism. A custodial wrapper such as WBTC swaps an asset you hold directly for a claim against a third party, which is a stronger case for a disposal. A contract wrapper such as ETH to WETH keeps the asset in a contract you can call yourself.
Take a position, apply it to every wrap and unwrap without exception, and keep a record of the reasoning behind it.
Wrapping is high volume and low value per transaction, so it gets ignored until the numbers add up. A trader who wraps and unwraps ETH a hundred times has either a hundred disposals to report or none, and those two answers produce very different returns. Software often takes the decision for you by defaulting one way, without flagging that a call was made at all.
Read our 2026 Guide to DeFi Taxes
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