Aave Tax Guide: How Lending, Borrowing, and aTokens Are Taxed
Key Takeaways
- Depositing assets into Aave to receive aTokens is likely a taxable swap; your cost basis is the FMV of assets deposited.
- Interest accrued via aToken appreciation is ordinary income when you withdraw aTokens and realize the gain.
- Borrowing on Aave is not a taxable event, but liquidation of collateral is a taxable sale.
- AAVE governance tokens earned through protocol rewards are ordinary income at FMV when received.
- Safety Module rewards in AAVE are ordinary income.
What Is Aave?
Aave is the largest decentralized lending protocol by total value locked. Users deposit cryptocurrencies (like ETH, USDC, or DAI) to earn interest; borrowers deposit collateral and borrow against it.
When you deposit assets into Aave, you receive aTokens (an ERC-20 token representing your deposit). For example, deposit DAI and you get aDAI. Unlike traditional interest-bearing accounts, aTokens continuously accrue interest; your aToken balance grows over time as interest is automatically added.
The tax treatment of Aave activity involves multiple events: deposits, interest accrual, withdrawals, borrowing, and potential liquidations. Understanding each is critical for accurate tax reporting. For a broader overview of crypto tax obligations, see our complete guide to crypto taxes.
Depositing Assets and Receiving aTokens
When you supply assets to Aave, you exchange your crypto for aTokens. The critical tax question: is this a taxable event?
The IRS has not issued specific guidance on this scenario. However, most tax professionals take the conservative approach: treating the deposit as a taxable swap. You gave up your DAI and received aDAI; these are two different assets with different market values.
Your cost basis in the aTokens equals the FMV of the assets you deposited on the day of deposit. If you deposit $10,000 of DAI when DAI is at $1.00 (so 10,000 DAI), your cost basis in aDAI is $10,000.
This initial recognition is typically not a gain or loss event (assuming 1:1 value), but it establishes a crucial cost basis for your future withdrawal.
A note on aToken mechanics: aTokens increase in quantity over time. If you deposit 10,000 DAI, over a year you might accumulate 10,500 aDAI as interest accrues. This is reflected in your aToken balance growing.
Interest Income and Ordinary Income
The interest earned on Aave deposits is ordinary income. Here's where the tax gets tricky: when exactly do you owe tax on the interest?
Under IRS rules, you have taxable income when you have "dominion and control" over the income. With Aave, interest accrues automatically and is reflected in your growing aToken balance. The conservative tax position is that interest is taxable when accrued (annually), even though you haven't withdrawn.
The practical approach many taxpayers use: report the interest as income when you withdraw the aTokens. At that point, you've clearly realized the income.
Here's the calculation:
Interest Income = FMV of Tokens Withdrawn - Cost Basis of aTokens Withdrawn
If your cost basis in aDAI is $10,000 and you withdraw when your aDAI position is worth $10,500, you have $500 of ordinary income from interest.
This becomes the ordinary income portion of your withdrawal transaction. If you held the aTokens over a year, any further appreciation is a long-term capital gain.
Withdrawing aTokens from Aave
When you redeem aTokens for the underlying assets, you're triggering a taxable event. Calculate your total gain or loss:
Gain/Loss = FMV of Assets Received - Cost Basis of aTokens
If your aDAI cost basis is $10,000 and you withdraw $10,500 worth of DAI, you have a $500 gain. The character (ordinary vs capital gain) depends on what portion is interest (ordinary) and what portion is appreciation of the aToken itself (capital).
For simplicity and conservatism, treat the gain as ordinary income unless you have detailed records separating interest from aToken appreciation.
Borrowing on Aave
Borrowing on Aave is not a taxable event. When you deposit collateral (say, 10 ETH) and borrow $100,000 of USDC, you don't trigger a taxable sale. The collateral remains yours; it's simply locked as security for the loan.
This is true regardless of whether you use the borrowed USDC for further investment, spending, or reinvestment. Borrowing is not a taxable disposition.
Interest on borrowed assets: You pay interest on your Aave debt. This interest is generally a deductible expense if the borrowed funds were used for investment purposes. If you borrowed USDC and then swapped it for ETH to increase your holdings, the interest is deductible as an investment expense. Consult your CPA for the specifics of your situation.
Liquidation Risk and Tax Impact
Aave is a collateralized lending protocol. If the value of your collateral falls below a certain threshold (determined by Aave's lending parameters), your collateral can be liquidated. Someone else repays your debt and receives your collateral at a discount, keeping the difference as a liquidation bonus.
From a tax perspective, liquidation is a taxable sale. The collateral is sold at the liquidation price, and you must report a capital gain or loss based on the FMV of the collateral when liquidated versus its cost basis.
This is one of the highest-cost tax events in DeFi. If you borrowed 100 USDC against 10 ETH (cost basis $20,000) and a price crash causes liquidation when ETH is worth $18,000, you realize an $18,000 gain or loss depending on your cost basis and the liquidation price.
Liquidations are involuntary, but the IRS taxes them as regular capital transactions.
AAVE Governance Tokens and Safety Module
AAVE tokens are the governance token of Aave. You can earn AAVE through:
- Supplying assets (some markets offer AAVE incentives)
- Borrowing (some markets offer AAVE incentives)
- Participating in the Safety Module (staking AAVE to earn rewards)
When you receive AAVE tokens, they are ordinary income at fair market value at the time of receipt, following the same principles as crypto staking taxes. The FMV at receipt becomes your cost basis. Any future appreciation is a capital gain.
The Safety Module allows you to stake AAVE to earn rewards in additional AAVE (or other assets). These rewards follow the same rule: ordinary income at receipt.
How to Track Aave Transactions
Tracking Aave activity requires detailed record-keeping:
Key data points for each transaction:
- Deposit/Withdrawal date and FMV of assets
- aToken cost basis
- Interest accrued (the increase in aToken balance)
- Any liquidation events (critical to capture the liquidation price)
- AAVE rewards received and FMV at receipt
Tools for tracking:
- Etherscan for on-chain transactions
- Aave's dashboard (shows your deposits and balances)
- FastCryptoTax can import your Aave activity via your wallet and automatically calculate gains and ordinary income
The difficulty with Aave: interest accrual is continuous, and calculating the exact interest income requires tracking your aToken balance changes daily (or using tax software that can infer it from on-chain data).