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How does DeFi Lending Work?

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Alexander Safonov
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Let's describe how DeFi-lending works. We'll talk about its advantages and disadvantages, as well as give examples of platforms where you can take DeFi-lending.

According to DeFi Pulse and Defistation, DeFi lending/borrowing protocols such as Aave, Maker, Venus, and Alpaca Finance lead among projects by total blocked funds (TVL), indicating an unusually high demand for such solutions. Next, we'll tell you how DeFi lending works and why it has become so popular.

What is DeFi Lending

In the world of traditional finance, lending and borrowing work as follows: people and organizations that have free funds lend them to other people or organizations for a period of time in exchange for a predetermined percentage of the borrowed funds. This usually involves intermediaries in the form of a bank or credit broker, who are responsible for checking on the borrower, drawing up the loan agreement, and monitoring its implementation. Of course, banks and brokers also take a fee in the form of a percentage for their services.

Devi-lending, as the name implies, is a decentralized version of such relationships, in which people and organizations can grant credits to other people and organizations without the involvement of third parties: banks and brokers. Their role is assumed by smart contracts - automated and self-executing algorithms in which all obligations of both parties and terms of lending contracts are coded, as well as the payment of percentages to creditors.

By removing intermediaries from the lending process, DeFi makes the transaction easier and the lending itself cheaper. But this comes at a price: the increased risk for the creditor of losing his money by giving it to a borrower who is unwilling or unable to pay it back. This problem is usually solved by the borrower providing excessive insurance.

Let's figure out what that means in DeFi-lending and how it works.

How DeFi-lending works


Scheme of the algorithm of the decentralized credit protocol. Source

The principle of lending platforms is simple: first, the protocol collects users' funds into "money markets," and then uses them to issue loans to other users via smart contracts. Money markets are the same liquidity pools of cryptocurrency exchanges, only on lending platforms they are not needed to buy and sell cryptocurrency assets, but to provide loans of money.

For the creditor, the process is as follows:

  1. The customer chooses the credit DeFi-platform.
  2. The user then locks their assets into a smart contract on that platform, after which they become available for borrowing.
  3. When someone takes out lending denominated in these assets, the smart contract issues so-called "percentage tokens" to the lender, for example, in Aave these tokens are called aTokens, while in Maker they are called Dai.
  4. Percentage tokens the user can exchange for bitcoins, ether, or another crypto at any time and withdraw or reinvest them.
  5. Funds locked in a smart contract (money market) can usually also be withdrawn at any time.
For the borrower, the process is as follows:
  1. The user chooses a credit DeFi-platform.
  2. The user then needs to pay a pledge, which is usually larger than the loan itself, for example, on the Compound platform, the minimum pledge is 133%. Excess collateral is needed to protect against the ultra-high volatility of the cryptocurrency markets, that is, to have time to sell the collateral before its value falls below the actual value of the lending itself.
  3. When a pledge is locked in a smart contract, the borrower receives funds denominated in the cryptocurrency or fiat money they want.
  4. If the value of the pledge falls (concerning the value of the loan) before repayment, the borrower must increase it. If it does not happen, the pledge is usually put up for public auction.
  5. At the end of the lending term, the borrower must repay it. If this does not happen, and in this case, the pledge is put up for auction.
And while on paper it may seem absurd, since a user can simply sell their cryptocurrency assets and get the amount of money they need, there are many reasons why DeFi-borrowing makes sense.
  • Users may need funds to cover any unforeseen expenses they may have incurred in avoiding selling their assets because those assets may be held to sell them at a higher value from the long-term perspective.
  • In some countries, borrowing through DeFi-protocols can avoid or defer payment of capital gains tax on crypto.
  • Traders can use borrowed funds to quickly increase their leverage on certain trading positions.
  • The cost of a DeFi-lending may be cheaper than the fees and commissions that need to be paid when selling a cryptocurrency asset.

Pros and cons of DeFi-lending

Main advantages of  DeFi-lending. Source

Now as we know how DeFi lending works, we can move on to look at the advantages and disadvantages of these types of lending platforms.

Among the main advantages of DeFi-lendings are the following:

  • Higher speed. Thanks to blockchain and smart contracts, DeFi-lendings are very fast - about a minute (a little more if you need to register). Without intermediaries and any verification, transactions are almost instantaneous. Whereas, loans from a bank can take several weeks to be disbursed.
  • Ease of Loan Delivery. To apply for a DeFi-lending, all you have to do is register on a relevant platform, such as Aave or Maker, and make a deposit, which is as easy as buying a phone on Amazon.
  • No intermediaries. Smart contracts allow lenders and borrowers to contract directly. In addition to speeding up and simplifying the transaction, it also allows lenders to earn higher returns and borrowers to borrow at lower interest rates.
  • Easy access to the market. DeFi is an open and transparent ecosystem that anyone with internet access and a crypto wallet can join. Location and credit history don't matter either.
  • More control over assets. Banks, credit brokers, and other centralized platforms can lose user funds due to inefficient financial activity, system errors, or hacker attacks. Whereas, DeFi-lending platforms do not store and have no access to their users' funds, which gives them much more control over their cryptocurrency assets and personal data.
  • Attractiveness for lenders. To lend your money at percentage in traditional finance, you need either to give private credit (which is not always legal and very risky), or to organize a credit cooperative (which is long and expensive), or to invest money in bank deposits (which is not always profitable and often risky). Whereas in DeFi-lending you can do it in a couple of minutes, with relatively low risks and fairly high percentages.
  • The programmability of processes. DeFi's smart contracts are easy to program, customize and automate execution, eliminating the need for constant monitoring by contractors.
  • Interoperability.  DeFi's protocols and applications use an interoperable software stack that allows them to integrate and complement each other - functioning as a single ecosystem.
  • Greater logic and objectivity in processes. In decentralized lending, credit policies are prescribed in smart contracts, which guarantees greater consistency and reduces variations in the evaluation of applicant attributes and the structuring of transactions by underwriters.
  • Market transparency. DeFi-lending platforms are based on public blockchains, so any user can check the terms and specifications of smart contracts and understand how the system works.
  • Greater analytics efficiency. Since DeFi lending is done digitally, it allows you to track all related processes and data. This creates an excellent environment for improving the quality of analytics for both the lender and the borrower.
  • Compliance with laws and regulations. Unlike banks and other traditional financial institutions, where no one can guarantee compliance with international, state, and local regulations because of the human factor. In DeFi-lending, laws, and regulations can be spelled out in a smart contract that guarantees their enforcement.
  • Immutability.  Another benefit of DeFi is the inability to change the data entered into the blockchain. This ensures reliable data coordination, increases security, and enables quality auditing.
  • Anonymity.  DeFi-lending usually does not require verification or identification, so users can borrow and lend money anonymously. Sometimes this can be useful, for example, if you don't want to attract the attention of criminals or competitors.
In addition to the above advantages, DeFi-loans have significant disadvantages that you also need to be aware of. Here are the main ones:
  • The risk of counterfeiting/hacking smart contracts. Although rare, users borrowing money from DeFi-platforms should still have at least an average level of technical knowledge and blockchain skills to be able to recognize a scam project. Or, they should only use DeFi-platforms that have been verified by independent auditing agencies.
  • Higher percentage rate. Even though DeFi allows you to make loans cheaper by eliminating intermediaries, this does not always give the desired result, because the absence of intermediaries, who act as an auditor of the borrower, increases the risks of default, which in turn increases the cost of credit. So, if you take the U.S., Britain, Canada, and other first world countries, the interest rate on loans there is on average 5-6% per year, while on DeFi-platforms, it ranges from 15-20% per year. But even this relatively high interest rate is much better than the interest rates in Brazil, Nigeria, Argentina, Belarus, and other developing countries - from 30 to 50% per year.
  • Regulatory issues. Because DeFi-platforms do not require user authentication and proof of source of funds, many regulators may consider transactions through them illegal or, at the very least, questionable.

DeFi- vs traditional lending

Decentralized lending emerged as an alternative to traditional banks, credit brokers, and private lenders. The main difference between them is the absence of centralized authorities and a much smaller number of intermediaries (there are almost none in DeFi). But this is not the only difference.

Here's a more detailed comparison of DeFi- and traditional lending:

How does DeFi Lending Work?

How does DeFi Lending Work?

As you can see from the table, DeFi-lending is very different from traditional practices. First, anyone can take a loan on DeFi-platform if he/she has the right amount of cryptocurrencies for pledging. Whereas on centralized platforms, the decision to lend depends on a moderator. Secondly, DeFi-platforms do not have access to users' money, they are responsible for its storage themselves.

How safe is DeFi-lending

DeFi lending is quite secure because users do not store their funds on the platform, and all transactions are done via open-source smart contracts. Thus, DeFi's lending and borrowing process has become transparent and secure. Although, only to the extent that the smart contracts themselves are transparent and secure. That's why code testing by an independent audit is standard for all DeFi projects.

The possibilities of DeFi-lending protocols

DeFi-lending services have similar functionality to conventional lending platforms, but they also often have some unique features due to the decentralized nature of the product. Here's a brief description of those features.

External wallet. To take advantage of DeFi-platforms, users need to connect their crypto-wallet like defi, which will be responsible for storing the user's money. For example, Compound provides integration with crypto wallets Metamask, Ledger, Wallet Connect, Coinbase Wallet. Service Aave provides more opportunities - now there are 30 cryptocurrencies available.

Instant loans. This type of collateral-free lending has gained popularity in DeFi thanks to the Aave and dYdX lending platforms. They were the first to introduce the ability to take out instant unsecured loans in cryptocurrency. These loans issue smart contracts for a limited term, often with restrictions (no selling or transferring coins until the loan is repaid), and they are automatically canceled if the user cannot repay the loan.

Although term loans are a rather innovative and controversial concept, users have already appreciated their advantages. The ability to get a collateral-free credit almost instantly provides traders with more options to make money on newsworthiness, price discrepancies on different exchanges, etc.

Investment rewards. To motivate users to lend their funds to a lending platform to lend to other users, such platforms provide all investors with remuneration in the form of a percentage of funds invested. And this interest is usually two-three times higher than the interest on deposits in the United States, Canada, the United Kingdom, and EU countries. At the same time, the risks are lower than when investing in bank deposits in developing countries.

Shift speed. Fast rate switching allows borrowers to switch between stable and variable interest rates and thus protect themselves from sudden fluctuations in cryptocurrency markets, which are still very volatile. An example of the implementation of this custom option can be seen on the Aave credit DeFi-platform.

Fiat gateway. This feature allows users to buy digital assets with fiat currency, making it much easier for those new to the cryptocurrency world to adapt to this market (and decentralized finance). In addition, the fiat gateway also makes it easier to integrate credit platforms with third-party services and applications outside the cryptocurrency industry.

Automation. In the DeFi sector, more of the routine business processes are automated and standardized through smart contracts. Therefore, investors in the DeFi lending business don't have to worry about their payments and/or dividends being frozen, stolen, or transferred to someone else by mistake. In addition, automation allows you to develop a mechanism for automatic payment of taxes and other mandatory fees and payments (if local laws require it).

Examples of credit DeFi-platforms

How does DeFi Lending Work?

How does DeFi Lending Work?

Prospects for DeFi-Lending

DeFi-loans are already hugely popular because of their affordability, simplicity, and economic appeal to borrowers and lenders alike. Thanks to them, it is possible to earn interest income from deposits without having to deal with banks or any actual counterparties. Exchange traders can make quick loans, making stock markets and capital markets more efficient. Companies can combine long-term speculative positions with short-term leveraged liquidity.

In traditional finance, these are all separate markets, which are often quite inefficient because they have long chains of intermediaries and aggregators standing between lenders and borrowers. Decentralized lending can easily bypass this separation through capital pooling, which requires no intermediaries or regulators, as contract rules and mechanisms can be built into the code of automated and self-executing smart contracts.

All this makes DeFi-lending a very promising area of decentralized finance, especially for lenders, because anyone can become a lender now, regardless of location, size of starting capital, or other factors. The main thing is to have access to the Internet, a cryptocurrency account, and at least some cryptocurrency in this account - $10 is enough.


How does DeFi Lending Work? key takeaways:

#1. What is DeFi Lending
#2. How DeFi-lending works
#3. Pros and cons of DeFi-lending
#4. DeFi- vs traditional lending
#5. How safe is DeFi-lending
#6. The possibilities of DeFi-lending protocols
#7. Examples of credit DeFi-platforms
#8. Prospects for DeFi-Lending

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Alexander Safonov
Author of the post
Merehead is a leading cryptocurrency development company

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