DeFi lending platforms promise to do what banks do, lend and borrow money, but without the bank. The comparison is useful because it shows exactly what you gain and what protections you give up when you move from one system to the other.
How Traditional Bank Lending Works
A bank takes deposits, holds a fraction in reserve, and lends the rest out to borrowers, earning the difference between what it pays depositors and what it charges borrowers. Regulation requires banks to hold capital buffers, and depositor funds are protected up to a set limit by schemes like the UK’s Financial Services Compensation Scheme.
How DeFi Lending Works
DeFi lending protocols let users deposit crypto into a smart contract-based pool, which other users can then borrow against, typically by posting collateral worth more than the loan itself. Interest rates adjust algorithmically based on supply and demand for each asset, updating far more frequently than a bank’s rates would. We covered the underlying mechanics in our how DeFi works guide.
Key Differences That Actually Matter
Collateral requirements
Most DeFi loans are over-collateralised, meaning you must deposit more value than you borrow. Traditional bank loans can be under-collateralised or entirely unsecured, based on credit history and income, which DeFi protocols generally cannot assess.
Access and approval
DeFi lending has no credit check or approval process; anyone with sufficient collateral can borrow instantly. Traditional lending requires an application, credit assessment, and approval process that can take days.
Protection if something goes wrong
Bank deposits are protected by the FSCS up to the current limit. DeFi deposits have no equivalent protection; if a protocol is exploited or its smart contract fails, deposited funds can be lost entirely with no recourse.
Transparency
DeFi lending pools are visible on-chain in real time, meaning anyone can verify the protocol’s total deposits, loans and collateral ratios directly. Bank balance sheets are reported periodically and are far less transparent to individual depositors.
The Risks DeFi Lending Introduces
Smart contract risk, meaning bugs or exploits in the protocol’s code, is a risk that simply does not exist in traditional banking. Liquidation risk is also distinct: if your collateral’s value falls too far, it can be automatically sold to repay your loan, sometimes at an unfavourable price during volatile market conditions.
Which Should You Use?
DeFi lending makes sense if you already hold crypto and want to borrow against it without selling, or want to earn yield on idle crypto holdings, and you understand and accept smart contract risk. Traditional banking remains the more appropriate choice for anyone who needs deposit protection or an unsecured loan based on income rather than collateral.
Frequently Asked Questions
Is DeFi lending regulated in the UK?
DeFi protocols themselves generally operate outside traditional UK financial regulation, though the exchanges and on-ramps used to access them may be regulated. This is an evolving area, so check current guidance before relying on any specific protocol.
Can I lose more than I deposit in DeFi lending?
As a lender depositing funds, your losses are generally limited to what you deposited. As a borrower, poorly managed collateral ratios can result in liquidation, but you cannot typically end up owing more than your collateral was worth.
Do DeFi lending returns count as income for UK tax?
Interest or yield earned through DeFi lending can potentially count as income at the point you receive it. This is general information, not personalised tax advice, so check HMRC’s current DeFi guidance for your situation.
This article is for general information only and is not financial advice. DeFi protocols carry risks not present in traditional banking, including smart contract failure and lack of deposit protection.
