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DeFi vault

A smart contract that pools deposits and applies a defined strategy, often issuing shares that represent each depositor’s interest.

What is DeFi vault?

A smart contract that pools deposits and applies a defined strategy, often issuing shares that represent each depositor's interest.

Why it matters on your return

Vault shares are a claim on a changing pool of assets, which makes the deposit look like an exchange under the common position: you dispose of the deposited token and acquire vault shares. Gains inside the vault are then reflected in share value and taxed when you redeem.

Example

You deposit 5 ETH (basis $8,000, worth $15,000) into a vault and receive 5 shares. Under the exchange position you recognize a $7,000 gain now and hold shares with a $15,000 basis. Redeeming the shares later for 5.4 ETH is a second disposal.

Is depositing into a DeFi vault taxable?

Under the common position, yes, because vault shares represent a different asset than what you deposited. A minority position treats simple single-asset vaults as deposits. We document the position taken.

Source: No IRS guidance as of September 2026; IRS Notice 2014-21 (property treatment)

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

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