Published May 27, 2026 4 Min Read

Introduction

Decentralised finance (DeFi) uses blockchain technology and smart contracts to provide financial services without banks or intermediaries. You can borrow, lend, trade, or earn interest directly through decentralised applications.

  • DeFi transactions are recorded on blockchain networks such as Ethereum.
  • Smart contracts automatically execute transactions when predefined conditions are met.
  • Most DeFi platforms operate 24/7 without traditional banking hours or branch visits.
  • DeFi applications include lending, crypto trading, staking, and decentralised exchanges.
  • Blockchain records are transparent and difficult to alter after verification.
  • Risks include price volatility, hacking, smart contract bugs, and regulatory uncertainty.

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What is decentralised finance (DeFi)?

Decentralised finance, also called DeFi, is a digital financial system built on blockchain technology. It allows you to access services such as lending, borrowing, trading, and payments without relying on traditional banks or financial institutions.

DeFi platforms mainly use smart contracts. These are self-executing computer programs stored on a blockchain. They automatically process transactions when specific conditions are met.

Unlike traditional finance, DeFi applications are usually open to anyone with internet access and a crypto wallet. Most DeFi systems operate continuously without fixed banking hours.

FeatureTraditional financeDecentralised finance (DeFi)
ControlBanks and institutionsBlockchain networks
AccessBank account requiredCrypto wallet required
Operating hoursLimited banking hours24/7 access
Transaction processingManual and centralisedAutomated through smart contracts
TransparencyLimited public visibilityPublic blockchain records

How does DeFi work?

DeFi works through blockchain networks and smart contracts. A blockchain is a digital ledger that records transactions across many computers instead of one central server.

Smart contracts handle transactions automatically. For example, if you lend cryptocurrency on a DeFi platform, the smart contract can calculate interest, transfer funds, and process repayments without human involvement.

Many DeFi applications are built on Ethereum because it supports programmable smart contracts. Users connect through digital wallets instead of bank accounts.

Main parts of the DeFi system

  • Blockchain: Stores transaction records securely across distributed networks.
  • Smart contracts: Execute rules and payments automatically.
  • Crypto wallets: Help users store digital assets and connect to DeFi platforms.
  • Decentralised applications (dApps): Platforms that provide DeFi services such as trading or lending.

Common DeFi applications

DeFi applicationWhat it doesExample use
Lending platformsAllow users to lend or borrow cryptoEarn interest on digital assets
Decentralised exchangesEnable peer-to-peer tradingSwap cryptocurrencies
StablecoinsReduce price volatilityDigital payments
Yield farmingRewards users for providing liquidityEarn additional crypto tokens

Why was DeFi created?

The main objective of decentralised finance is to remove intermediaries from financial transactions. Instead of depending on banks or payment processors, DeFi uses blockchain systems to handle transactions directly.

DeFi also aims to improve financial access. People in regions without strong banking systems can use DeFi applications if they have internet access and a compatible wallet.

Key objectives of DeFi

ObjectiveMeaning
Financial accessServices available without traditional bank accounts
TransparencyBlockchain records are publicly visible
AutomationSmart contracts reduce manual processing
Lower dependency on intermediariesFewer third-party institutions involved
Faster transactionsTransactions can process globally in minutes

Some DeFi systems also support cross-border payments. This can reduce delays compared to traditional international transfers.

Real-world example of DeFi in action

Suppose you own cryptocurrency and want to earn returns on it. Instead of keeping it unused in a wallet, you can deposit it into a DeFi lending platform.

A smart contract then lends your crypto assets to borrowers. In return, you may receive interest payments based on platform rules and market demand.

Another common example is decentralised exchanges. These platforms allow users to trade cryptocurrencies directly with other users without a central broker.

Risks you should understand

DeFi can offer flexibility, but it also carries risks. Prices of cryptocurrencies can change sharply within short periods.

RiskExplanation
Market volatilityCrypto asset prices can rise or fall quickly
Smart contract bugsCoding errors may lead to losses
Cybersecurity threatsPlatforms can face hacking attempts
Regulatory uncertaintyRules for DeFi vary across countries
Liquidity riskSome assets may be difficult to sell quickly

Unlike bank deposits, most DeFi investments are not protected by government-backed insurance systems.

Conclusion

Decentralised finance (DeFi) uses blockchain technology and smart contracts to provide financial services without traditional intermediaries. It supports activities such as lending, borrowing, trading, and payments through decentralised applications.

Before using DeFi platforms, you should understand both the opportunities and the risks. Crypto markets can be highly volatile, and regulations continue to evolve globally.

Frequently asked questions

Can you make money with decentralised finance?

Yes, you can potentially make money with decentralised finance (DeFi) through lending, staking, yield farming, or trading cryptocurrencies. Returns depend on market conditions, platform demand, and crypto prices. Many DeFi applications use smart contracts to distribute rewards automatically. However, DeFi investments are highly volatile and can involve hacking, liquidity, or smart contract risks. The Bajaj Broking website also provides educational content to help you understand investment-related concepts before making financial decisions.

Is decentralised finance safe?

DeFi can offer transparent and automated financial services, but it is not completely risk-free. Blockchain records are difficult to alter, yet smart contract coding errors and cyberattacks can still happen. Cryptocurrency prices may also fluctuate sharply. Unlike traditional bank deposits, most DeFi platforms do not provide government-backed protection or guaranteed returns. You should carefully review platform security practices and understand the risks before investing or trading through DeFi systems.

What is decentralised finance for dummies?

Decentralised finance (DeFi) is a way to use financial services without banks. Instead of visiting a bank branch, you use blockchain networks, crypto wallets, and smart contracts to borrow, lend, or trade digital assets online. Smart contracts automatically process transactions when conditions are met. Many DeFi applications run on blockchain networks like Ethereum and operate 24/7 through decentralised applications connected to your digital wallet.

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Disclaimer

Bajaj Finance Limited (“BFL”) is an NBFC offering loans, deposits and third-party wealth management products.

The information contained in this article is for general informational purposes only and does not constitute any financial advice. The content herein has been prepared by BFL on the basis of publicly available information, internal sources and other third-party sources believed to be reliable. However, BFL cannot guarantee the accuracy of such information, assure its completeness, or warrant such information will not be changed.

This information should not be relied upon as the sole basis for any investment decisions. Hence, User is advised to independently exercise diligence by verifying complete information, including by consulting independent financial experts, if any, and the investor shall be the sole owner of the decision taken, if any, about suitability of the same.

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Disclosure
: Bajaj Finance Limited (BFL) is a distributor of Mutual Funds with ARN - 90319 and distributes mutual funds of Bajaj Finserv Asset Management Limited (BFSAMC). BFL receives commission towards distribution of mutual fund products. BFSAMC is a group company of BFL, carrying business on arm’s length basis without any conflict of interest and in accordance with the prevailing law / regulation.