Decentralised Finance Explained for UK Businesses

Could your business lend, borrow or transfer digital assets without going through a traditional bank? Decentralised finance (DeFi) opens up these possibilities, but it also raises questions about security, financial losses and regulatory responsibilities.

For UK business owners asking “What is DeFi?”, the main concern is how it could affect their financial operations. Beyond the basic DeFi definition, this guide examines practical business applications, potential risks and UK regulatory requirements in 2026.

UK founders need to understand how DeFi services operate before deciding how to use them. Those planning to develop their own products can also consult blockchain development companies in the UK about technical feasibility.

What is decentralised finance (DeFi)? It refers to financial services, such as lending, borrowing and payments, that operate through blockchain-based applications rather than traditional banks. These applications use smart contracts to execute transactions automatically when predefined conditions are met.

Business example: A UK company holding cryptocurrency could deposit some of its digital assets into a DeFi lending platform to earn variable interest.

DeFi vs traditional finance: Key differences

The difference is evident when it comes to determining who has access to the financial system and how transactions are registered and executed.

DeFi is often described as decentralised banking, but it offers more than just traditional banking services.

To understand the DeFi meaning in practice, it helps to distinguish four components: blockchain records transactions, smart contracts execute instructions, protocols define operating rules and wallets allow users to interact with services.

Blockchain and smart contracts

To answer the question “What is DeFi in blockchain technology?”, it helps to understand the role of smart contracts. These programs automatically execute transactions when predefined conditions are met, while the blockchain records the results across a network of computers.

In blockchain development for business, these programs can also automate asset transfers, transaction verification and other financial processes.

DeFi protocols, platforms and apps

These terms describe different parts of a DeFi service, from its underlying rules to the interface customers use:

• Protocol: A set of rules governing financial transactions.
• Platform: A service that operates using those rules, such as a lending or trading platform.
• DeFi apps: User-facing interfaces for accessing lending, trading and other services.

DeFi wallets

What is a DeFi wallet? It is a digital wallet that allows users to manage cryptoassets and connect to DeFi applications, such as lending and trading services. To complete a transaction, users typically:

1. Open a DeFi app and connect a compatible wallet.
2. Choose an action, such as lending or exchanging digital assets.
3. Review and confirm the transaction in their wallet.

A company holding cryptocurrency may want to earn returns on unused assets, access funds without selling its holdings or pay overseas suppliers directly. Decentralised finance offers ways to carry out these activities, although the costs, risks and practical requirements differ for each.

DeFi lending and borrowing

DeFi lending protocols allow users to supply cryptoassets to earn variable returns or borrow against digital assets deposited as collateral. Many loans require collateral worth more than the borrowed amount. Protocols such as Aave use smart contracts to manage deposits, borrowing and repayments.

For businesses holding cryptocurrency, this can provide access to funds without going through a traditional bank loan application process.

Decentralised exchanges (DEXs)

One way to answer “What is DeFi in crypto trading?” is to look at decentralised exchanges (DEXs). These allow users to trade cryptoassets through blockchain-based software without relying on a centralised exchange operator. Uniswap is a well-known example.

Many DEXs use liquidity pools, which contain digital assets deposited by users. These shared reserves allow trades to take place without matching individual buyers and sellers for each transaction.

For companies offering digital asset trading, mobile app development for fintech startups may involve building an interface that connects customers to existing DEX protocols.

Stablecoins and cross-border payments

Stablecoins are cryptoassets designed to maintain a value relative to a reference asset, commonly the US dollar. Their stability depends on factors such as reserve backing, redemption arrangements or other mechanisms.

A UK business can use stablecoins to pay suppliers abroad, while DeFi platforms can facilitate their exchange through non-centralised platforms.

Tokenisation of real-world assets

Tokenisation allows assets such as property, bonds and commodities to be represented by digital tokens on a blockchain. The tokens may represent ownership interests, contractual claims or other rights, depending on how they are issued.

As an illustration, an interest in a business real estate may be represented through digital tokens whereby several investors can take part without buying the entire property. However, holding a token does not automatically grant legal ownership of the property. The investor’s rights depend on the underlying legal arrangements.

Is DeFi safe? No platform is completely risk-free and organisations can lose funds through smart contract vulnerabilities, cryptocurrency price fluctuations, or scams. Before committing company assets, assess how these risks could affect your transactions and whether you could recover your funds if something goes wrong.

Smart contract bugs and hacks

Smart contracts execute transactions automatically, but errors in their code can create security vulnerabilities. Hackers may exploit these weaknesses to steal funds or manipulate transactions.

Once a blockchain transaction is confirmed, it is usually irreversible, making stolen assets difficult to recover.

Price swings and stablecoin risk

Cryptocurrency prices can change sharply within hours. If the value of assets used as loan collateral falls below a required threshold, the lending protocol may automatically liquidate some or all of them.

Stablecoins carry a different risk. Although they are designed to maintain a stable value relative to a currency such as the US dollar, they can lose their peg, potentially causing financial losses.

Scams and fake platforms

A scammer may use legitimate DeFi protocols to commit theft and gain transaction approval that is not intended for malicious purposes. The following red flags are often seen:

• Guaranteed returns: Promises of high profits with little or no risk.
• Pressure to invest immediately: Urgent offers designed to prevent careful research.
• Unknown developers: Projects with unverifiable teams or little information about their operations.

The FCA of the UK issues warnings against unauthorised firms. These warnings can be accessed by companies to investigate a financial service provider.

No safety net: Lost keys and no customer support

Eligible deposits held with UK-authorised banks are protected by the Financial Services Compensation Scheme (FSCS). Banks also provide customer support to help resolve account-related issues.

Deposits made within DeFi applications do not typically receive the backing of the FSCS. Decentralised platforms also lack a central body that can unwind transactions and help users recover their money.

If a firm loses the private key or recovery key to a self-custody wallet and has no backup, it can lose all its digital assets forever.

On 30 June 2026, the FCA published final rules for key cryptoasset activities, followed by further guidance in September. The new regime is scheduled to take effect on 25 October 2027, with an initial authorisation application window running from 30 September 2026 to 28 February 2027.

Businesses carrying out activities covered by the regime will generally need FCA authorisation unless an exemption applies. DeFi is not automatically exempt, as its legal treatment depends on the services offered and the parties involved.

Companies developing cryptoasset products can consult financial software development companies in the UK about technical implementation and seek legal advice on compliance.

How HMRC views DeFi

HMRC has issued guidance on DeFi lending and staking, as well as on how these activities might be taxed. Businesses should record transactions, such as asset transfers and reward earnings, so an accountant can determine the appropriate approach.

UK market snapshot: How many Britons hold crypto?

According to the latest FCA survey, crypto ownership was lower in 2025 than in prior years.

The figures show that cryptoasset ownership in the UK declined between 2024 and 2025. However, they do not indicate how many people use DeFi services.

A business can either use DeFi services for its own financial needs or create something for customers.

If your business plans to use an existing DeFi service, take these precautions before transferring company funds:

• Start small. Test the service with a limited amount of funds before committing more.
• Choose an established DeFi platform. Check its operating history, security audits and reputation before committing funds.
• Use a separate business wallet. Keep company digital assets separate from personal holdings.
• Consult specialists. Speak with an accountant and a lawyer before making transactions.

When should you build your own DeFi product?

Developing a DeFi product makes sense if the company wants to offer lending, payment, or trading services using blockchain technology directly to customers and current platforms don’t meet its needs.

Such a project requires software development services covering blockchain integration, smart contracts and financial applications. Before starting, businesses should define their technical requirements and regulatory obligations.

The question “What is DeFi and how does it work?” is particularly relevant for UK businesses considering alternative financial services. Before adopting DeFi, companies should compare available platforms, check applicable UK regulations and test transactions with limited funds.

Businesses planning to develop DeFi products for customers should assess technical requirements and regulatory obligations before investing in development.