Tax Treatment of DeFi Yield

The Core Question

DeFi yield comes in many forms: lending interest (Aave, Compound, Morpho), trading fees earned as an LP (Uniswap v2, v3, v4), liquidity mining rewards (many DEXs and lending protocols), option premium capture, funding rate capture in perpetuals, and various farming strategies that combine these. The core tax question is when and how each form of yield is taxed. Most jurisdictions treat active DeFi yield as ordinary income, but the timing of recognition, the valuation basis, and the treatment of associated capital events differ. This is educational, not tax advice — get specific guidance from a qualified adviser for your situation.

Lending Interest

Lending interest earned via Aave, Compound, Morpho, and similar protocols is generally treated as ordinary income when earned. The specific timing question is whether interest is recognised as it accrues (continuously in most protocols) or when it becomes withdrawable. Most tax authorities have not been prescriptive here; the safer position is to recognise as it accrues, which usually means daily. Consumer tax software will typically do this automatically if you connect the wallet. Cross-chain positions (lending on Aave Base while custodying on Ethereum mainnet) can complicate reporting.

LP Fees and Rewards

Being a liquidity provider generates two types of return: trading fees (a share of every swap through the pool) and liquidity mining rewards (a separately-issued token like OP, ARB, veCRV bribes). Trading fees accrue as your LP position value increases; most jurisdictions treat them as ordinary income when realised — usually when you withdraw or claim. Liquidity mining rewards are generally taxable at receipt, similar to airdrops. Impermanent loss reduces your capital-gains basis but is not itself a taxable event; it becomes real only when you actually exit the position at a loss versus what a hold-and-not-LP strategy would have produced.

• Lending interest: ordinary income, usually as it accrues
• LP trading fees: ordinary income, usually at claim/withdrawal
• Liquidity mining rewards: ordinary income at receipt
• Impermanent loss: reduces basis, not a separate taxable event