How Alchemix self-repaying loans work

The lifecycle of a single Alchemix self-repaying loan

The cycle begins with a deposit. You send collateral to an Alchemix vault, and the protocol records both the deposited amount and your borrowing capacity, which is a conservative fraction of that deposit. If the ratio is fifty per cent, a deposit of ten thousand units of value entitles you to mint up to five thousand units of synthetic debt. Nothing forces you to borrow the maximum, and borrowing less is the single easiest way to make the position comfortable.

Once you mint, you hold a liquid synthetic token and you carry a debt line inside the vault. From that moment, every unit of yield your collateral earns is applied to that debt line. The debt only moves in one direction unless you mint again. When it reaches zero, the position is simply a deposit again, and the collateral can be withdrawn in full.

Why Alchemix loans have no interest and no ordinary liquidation

Conventional loans charge interest because a lender is giving up the use of real capital. Alchemix mints a synthetic token against collateral it already holds, so there is no lender to compensate and no interest rate to accrue. Your debt figure on day one is the same figure on day one thousand, minus everything the yield has repaid in between.

Liquidation in ordinary lending happens when the value of collateral falls relative to the value of a different borrowed asset. In Alchemix the debt is denominated in a synthetic version of the same asset you deposited, so a fall in the market price of that asset moves both sides of the equation together. This does not make the position risk-free, but it removes the price-driven liquidation cascade that defines most leveraged DeFi.

• No interest accrues on the outstanding balance
• Debt is denominated in a synthetic of your own collateral
• Yield is applied continuously and automatically
• Borrowing below the maximum increases your safety margin

Repaying early, withdrawing and closing an Alchemix position

You are never locked in. Two routes exist for clearing debt ahead of schedule. You can repay with the underlying asset, which credits your balance directly, or you can burn alAssets you have acquired on the market, which reduces the debt one for one. Traders sometimes prefer the second route when the synthetic trades slightly below par, because they clear a full unit of debt for less than a full unit of value.

Withdrawal follows the same logic. You may remove collateral at any time as long as the remaining deposit still covers the outstanding debt at the required ratio. Fully repaying first unlocks the whole balance. The important habit is to check your ratio before withdrawing rather than after, because the contract will simply refuse a withdrawal that would breach the limit.

How long does Alchemix self-repayment actually take?

The honest answer is that it depends entirely on the yield rate and how much you borrowed. Borrowing half of your maximum at a five per cent net yield takes roughly a decade to clear; borrowing a quarter at the same rate is far faster in proportional terms. Because yield rates in DeFi float, any projection is an estimate rather than a schedule.

This is why experienced users treat the repayment horizon as a planning range rather than a promise. Model a pessimistic yield, check whether the resulting timeline still suits your goals, and size the loan accordingly. A loan that repays itself slowly is still a loan that never demands a payment from you.