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DeFi collateral

Crypto pledged to support a borrowing position and potentially available for liquidation if the position becomes undercollateralized.

What is DeFi collateral?

Crypto pledged to support a borrowing position and potentially available for liquidation if the position becomes undercollateralized.

Why it matters on your return

Pledging collateral is not a sale; you still own it, and basis and holding period continue. The tax event is the liquidation, when the protocol sells your collateral to cover the loan. That is a disposal at the protocol's execution price.

Example

You pledge 10 ETH (basis $15,000) for a stablecoin loan. No tax. ETH falls and 4 ETH are liquidated at $2,000 each: an $8,000 sale against a $6,000 basis, a $2,000 gain, even though you received nothing new.

Is posting collateral taxable?

No. The tax event is a liquidation, or your own repayment and withdrawal if you later sell the collateral.

Source: IRC 1001; IRS Notice 2014-21

Last reviewed September 18, 2026. Tax rules change; confirm current law before acting.

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