This guide is educational and is not financial advice. Crypto lending carries a real risk of losing money. Check current terms directly with any platform before you deposit.
In short
- Uncollateralized crypto loans are lent against the borrower’s creditworthiness, not against crypto locked in a smart contract.
- Most DeFi lending is the opposite: borrowers post more collateral than they take out, and a liquidation bot sells it if the value falls.
- On-chain credit pools fill the gap with identified borrowers, human underwriters, legal agreements and sometimes first-loss capital.
- The yield is higher because the risk is higher. When a borrower fails, lenders can lose most of their deposit, as the 2022 and 2023 defaults showed.
What “uncollateralized” actually means
Every loan answers one question: what happens if the borrower does not pay back? In crypto there are three common answers, and the name of the loan tells you which one applies.
| Type | Collateral | If the borrower does not repay |
|---|---|---|
| Over-collateralized | More than the loan, for example $150 of ETH for a $100 loan | The protocol sells the collateral automatically |
| Under-collateralized | Some, but less than the loan | Collateral covers part of the loss, the rest depends on recovery |
| Uncollateralized | None on-chain | Lenders depend on legal claims, recovery and any first-loss cover |
The word “unsecured” is often used for the same thing. In practice many products sit somewhere in between: a pool may ask for no on-chain collateral but hold a legal claim on the borrower’s receivables or business assets. Read the loan terms, not the marketing label.
Why DeFi lending is over-collateralized by default
A smart contract cannot sue anyone. Wallets are pseudonymous, there is no credit history attached to an address, and a borrower who walks away faces no consequence unless something forces repayment. Over-collateralization solves this with code: the collateral is always worth more than the debt, and if prices move, a liquidation sells it before lenders lose money. You can read how that works in our guides to the loan-to-value ratio and crypto collateral.
The cost is that this kind of loan is useless to most real borrowers. A business that needs working capital rarely has more crypto than it wants to borrow. If it did, it would not need the loan.
How uncollateralized on-chain lending works
On-chain credit protocols keep the settlement on the blockchain (deposits, loans, repayments and interest are visible on-chain) but move the credit decision back into the real world. The details differ between platforms; the building blocks are usually the same.
- Identified borrowers. Borrowers pass KYC or KYB checks. Lenders may also need to be verified, especially in pools that lend to regulated businesses.
- Underwriting by a person or a firm. A pool delegate, curator or credit manager reviews the borrower’s financials and sets limits and rates. Lenders are trusting this underwriter as much as the borrower.
- A legal agreement. The loan sits on a contract that can be enforced in court. Some structures lend through a special purpose vehicle that holds the claim on the borrower.
- A credit line or term loan. The borrower draws stablecoins from the pool and repays with interest on a schedule.
- Loss buffers. Some pools have first-loss capital from the underwriter or a junior tranche that absorbs the first defaults before senior lenders are hit.
How the borrower is judged is a topic of its own. We explain the methods, from audited accounts to privacy-preserving credit ratings, in our guide to on-chain credit scoring.
Who borrows without collateral
Two groups have used on-chain credit most:
- Crypto-native firms such as market makers and trading desks, which need short-term liquidity and were the first borrowers on several under-collateralized protocols.
- Real-world businesses such as fintech lenders, exporters and companies financed against future revenue. See our use cases for revenue-based financing, trade finance and emerging market credit.
The two behave very differently. Loans to trading firms depend on crypto markets, so they tend to fail together in a crash. Loans to real-world businesses are less tied to crypto prices but carry business, currency and legal risk in the borrower’s country.
What went wrong in 2022 and 2023
Uncollateralized lending had its stress test in the bear market, and the results are the best guide to the real risk.
- Maple Finance, December 2022. Trading firm Orthogonal Trading defaulted on $36 million of loans after the collapse of FTX, roughly 30% of active loans on the protocol at the time. Maple said the firm had misrepresented its financial position. Lenders in the affected USDC pool faced losses of about 80% (The Block, 5 December 2022).
- Maple’s change of course, 2023. After the defaults, Maple made all pools launched in 2023 over-collateralized and wound down the legacy under-collateralized pools (DL News, 25 September 2023).
- Goldfinch, October 2023. The real-world lending protocol wrote down $7 million of a $20 million loan to the borrower Stratos to zero (The Defiant, October 2023).
The lesson
Uncollateralized loans do not fail gradually. A pool can look healthy for months and then lose a large part of its value in one event, because the protection is a legal claim, not collateral that can be sold in minutes.
Risks for lenders
- Default risk: the borrower cannot or will not pay, and recovery through courts is slow and partial.
- Underwriter risk: the person or firm vetting borrowers misjudges them or is misled.
- Concentration: a pool with a few large borrowers can lose a big share of its value in one default.
- Liquidity: deposits are lent out, so withdrawals may have to wait for repayments.
- Smart contract and stablecoin risk: the same technical risks as any DeFi deposit. See smart contract risk and stablecoin depeg risk.
- Legal risk: your claim depends on the contract, the jurisdiction and whether you, as a lender, are actually a party to it.
A checklist before you lend
- Who is the borrower, and can you read their financial reports?
- Who underwrites the pool, how have their past pools performed, and do they put their own money in first?
- Is there a legal agreement, under which law, and who enforces it for lenders?
- How concentrated is the pool, and what is the largest single loan?
- How long can your money be locked, and what happens to withdrawals during a default?
- Is the rate high because the risk is high? Compare it with the yields on over-collateralized lending.
Frequently asked questions
Are uncollateralized crypto loans legal?
Lending without collateral is a normal part of finance. Whether a specific platform may offer it to you depends on its licences and your country. Many on-chain credit pools are open only to verified or professional lenders.
Can I borrow crypto without collateral as an individual?
Rarely. Most uncollateralized on-chain credit goes to companies that pass business verification and underwriting. Flash loans are borrowed without collateral but must be repaid in the same transaction, so they are a developer tool, not a personal loan.
Why are rates higher than on Aave or Compound?
Because lenders carry credit risk. In over-collateralized lending the collateral protects you; in uncollateralized lending only the borrower’s ability to pay and the legal agreement do.
What happens to my deposit if a borrower defaults?
Losses are usually shared by all lenders in the pool after any first-loss capital is used up. Recovery, if any, comes later through legal action and can take years.
Sources
- The Block: Orthogonal Trading defaults on $36 million of loans on Maple Finance (5 December 2022)
- DL News: Crypto lender Maple ditches under-collateralised lending (25 September 2023)
- The Defiant: Goldfinch writes down $7M of $20M Stratos loan to $0 (October 2023)
Our standards
This article was researched from primary sources and checked by a second person before publication. Found an error or an outdated number? Tell us and we will correct it. Corrections policy.
