MakerDAO Tax Guide: How DAI, Vaults, and Stability Fees Are Taxed
Key Takeaways
- Locking collateral in a Vault is not a taxable event; you still own the collateral.
- Minting DAI is not a taxable event; it's a loan, not a sale.
- Stability fees (interest on DAI debt) are a deductible expense if borrowed DAI was used for investment.
- Each trade of DAI is a taxable event like any token swap.
- Vault liquidation is a taxable sale of collateral at the liquidation price.
- DAI Savings Rate (DSR) earnings are ordinary income.
What Is MakerDAO?
MakerDAO is a decentralized protocol that allows users to lock cryptocurrency collateral (ETH, wBTC, etc.) to mint DAI, a stablecoin pegged to the US Dollar.
The protocol operates like a collateralized debt position (CDP). You lock up crypto as collateral and borrow DAI against it at a ratio determined by MakerDAO governance. You pay interest (called a stability fee) to maintain this debt.
The tax treatment of MakerDAO is distinct from lending protocols like Aave or Compound. For a broader overview of crypto tax obligations, see our complete guide to crypto taxes. Because DAI is a stablecoin and the collateral is locked (not sold), several MakerDAO transactions have no immediate tax consequences.
Locking Collateral in a Vault
When you deposit collateral (say, 10 ETH) into a MakerDAO Vault, you are not selling the collateral. It remains yours; it's simply locked as security for the DAI loan you'll take.
From a tax perspective, locking collateral is not a taxable event. You still own the 10 ETH; its tax basis doesn't change. You're simply encumbering it with a debt obligation.
This is fundamentally different from Aave, where supplying assets nets you an interest-bearing token. With MakerDAO, the collateral stays collateral; you just can't access it until you pay back the loan.
Minting DAI and Borrowing
When you mint DAI against your locked collateral, minting DAI is not a taxable event. DAI is a loan you're taking out, not a sale of your collateral.
This is true regardless of how much DAI you mint or what you do with it afterward. Borrowing crypto is never a taxable event, per IRS guidance.
You can mint DAI and:
- Spend it on goods and services (no tax impact from the mint itself, though spending may trigger other transactions)
- Swap it for other crypto (the swap is taxable, not the minting)
- Earn interest on it (the interest is ordinary income)
- Use it to invest (the use isn't taxed; only the investing activity itself)
Stability Fees and Tax Deduction
MakerDAO charges an annual interest rate called the stability fee to maintain your debt. This is paid in DAI and added to your outstanding balance.
From a tax perspective, stability fees are interest expense. Interest paid on borrowed funds is potentially tax deductible if the borrowed funds were used for an investment purpose.
Important distinction:
- If you borrowed DAI and used it to buy more crypto for investment, the stability fee interest is deductible as an investment expense
- If you borrowed DAI and spent it on personal consumption (goods, services), the interest is NOT deductible
Example: You lock 10 ETH, mint 50,000 DAI, and swap it for more crypto to hold as investment. You pay 1,000 DAI in stability fees over a year. That 1,000 DAI interest is deductible.
Contrast: You lock 10 ETH, mint 50,000 DAI, and use it to pay for a vacation. The 1,000 DAI in stability fees is not deductible.
Consult your CPA about how to document the use of borrowed DAI to claim the deduction properly.
DAI Trading and Swaps
DAI is a cryptocurrency asset, even though it's a stablecoin. Each time you trade DAI for another token, you trigger a taxable swap.
Example: You swap 50,000 DAI for 25 ETH. You must calculate the gain or loss.
Gain/Loss = FMV of ETH Received - Cost Basis of DAI
Your cost basis in DAI is the amount you paid for it (whether you minted it from MakerDAO or bought it on an exchange). If you minted 50,000 DAI for a stability fee of 1%, your cost basis is 50,500 DAI or the equivalent in stablecoins/dollars.
Since DAI is designed to maintain a $1 peg, most DAI swaps create minimal gains or losses. But the transaction is still taxable and must be reported.
Vault Liquidation
If the price of your collateral drops significantly, or if you draw too much DAI against your collateral, your Vault can be liquidated. MakerDAO will sell your collateral and use the proceeds to repay your DAI debt.
Liquidation is a taxable sale of your collateral. You must report a capital gain or loss:
Gain/Loss = FMV of Collateral at Liquidation - Cost Basis of Collateral
This is an involuntary transaction, but the IRS taxes it as a regular capital transaction.
Example: You locked 10 ETH (cost basis $15,000) as collateral. A price crash causes liquidation when ETH is worth $12,000. You realize a $3,000 capital loss.
Liquidations are often painful from both an economic and tax perspective. Document the liquidation date, collateral liquidated, and liquidation price for your records.
DAI Savings Rate (DSR)
The DAI Savings Rate (DSR) allows you to deposit DAI and earn interest passively. When you deposit DAI into the DSR smart contract, you earn a daily interest rate on your DAI balance.
This interest is ordinary income when earned/accrued, following similar principles to crypto staking taxes. You must report the FMV of the interest income annually, even if you haven't withdrawn it from the DSR contract.
Practically, many taxpayers report the income when they withdraw from the DSR. For compliance, consult your CPA about whether accrual or withdrawal is appropriate for your situation.
The cost basis in earned interest is the FMV at the time of receipt/accrual. Any future appreciation of that interest (if the interest was in ETH or another volatile asset instead of DAI) would be a capital gain or loss.
MKR Governance Token
MKR is MakerDAO's governance token. You can acquire MKR through:
- Direct purchase on exchanges
- Holding DAI (some incentive programs have distributed MKR)
- Governance participation rewards (if applicable)
When you receive MKR tokens, they are ordinary income at FMV at the time of receipt. The FMV becomes your cost basis. Any future appreciation or depreciation is a capital gain or loss.
Holding MKR gives you voting rights on MakerDAO governance but doesn't generate automatic rewards. Only received MKR (not price appreciation) is a taxable event.
How to Track MakerDAO Transactions
Tracking MakerDAO activity requires capturing several key data points:
At vault creation/collateral locking:
- Date, collateral type, quantity, and FMV
- Note: no tax event, but important for future capital gains calculation on collateral
At DAI minting:
- Date, quantity of DAI minted
- Note: no tax event, but needed for tracking borrowed amount
At stability fee payments:
- Date, amount of stability fee paid
- Note: document use of DAI for deduction eligibility
At DAI trading/swaps:
- Date, quantity of DAI swapped
- Token received, quantity, FMV
- Calculate gain/loss
At DSR deposits/withdrawals:
- Date, quantity of DAI deposited
- Interest earned (FMV at withdrawal or accrual)
- Report as ordinary income
At liquidation:
- Date, collateral liquidated, quantity, liquidation price
- Calculate capital loss or gain
Tools like FastCryptoTax can import MakerDAO transactions via your wallet address and automatically calculate capital gains, ordinary income, and expense deductions.