Are Trading Bots Legal in the UK?
Are trading bots legal in the UK? Yes. Using software to place your own trades is lawful; the law regulates the activity around the bot, not the code itself. The platform you trade through must be authorised by the Financial Conduct Authority for regulated instruments such as shares, forex and CFDs, and registered with the FCA for anti-money-laundering purposes if it deals in cryptoassets. Market-abuse rules apply to every order, whether placed by a human or an algorithm. This page explains which FCA rules affect bot traders, what makes a bot service illegal, and how to check a firm before you deposit.
FCA-Authorised Platforms and the General Prohibition
No UK law bans the use of automated software to buy and sell financial instruments. What the law does control is the activity around the bot and the platform on which it operates.
For regulated instruments (shares, forex, contracts for difference and listed derivatives), the broker or dealer must hold the appropriate FCA authorisation. Section 19 of the Financial Services and Markets Act 2000 (FSMA) sets out the general prohibition: no person may carry on a regulated activity in the United Kingdom unless they are an authorised person or an exempt person. If your broker is FCA-authorised, executing trades through its API with a bot is treated the same as clicking a buy button manually.
For cryptoassets, the position is slightly different. Crypto exchanges operating in the UK must be registered with the FCA under the Money Laundering Regulations for anti-money-laundering supervision. Since 8 October 2023, any firm marketing cryptoassets to UK consumers must also comply with the FCA's cryptoasset financial promotions regime, introduced by Policy Statement PS23/6. This applies regardless of where the firm is based and covers websites, apps and social media posts.
Market-Abuse Rules Apply to Automated Orders
The UK Market Abuse Regulation (UK MAR, retained from EU law) applies to all orders regardless of how they are placed. A bot that engages in spoofing (placing orders you intend to cancel to move the price), layering (stacking orders at different levels to create a false impression of supply or demand) or wash trading (trading with yourself to inflate volume) is subject to the same enforcement action as manually placed abusive orders.
Thin or illiquid markets carry extra risk. If your bot repeatedly moves the price of a lightly traded instrument, the FCA may treat that as market manipulation even if the strategy was not designed to deceive. The obligation falls on you, the account holder, to ensure your algorithm does not produce abusive order patterns. Ignorance of what the bot was doing is not a defence.
Cryptoasset Derivatives, ETNs and CFD Leverage Caps
The FCA's product intervention rules determine which bot strategies are available to UK retail traders. Under FCA Handbook COBS 22.6, firms must not sell, distribute or market cryptoasset derivatives (crypto CFDs, futures or options) to retail clients. This ban remains in force and is the main reason crypto futures bot features are typically switched off for UK-based accounts.
The ETN position has changed. In January 2021 the FCA banned the sale of cryptoasset exchange-traded notes (ETNs) to retail consumers alongside the derivatives ban. On 8 October 2025 the FCA lifted the ETN restriction: retail clients may now access crypto ETNs that are listed on a UK Recognised Investment Exchange (RIE). These products are classified as Restricted Mass Market Investments (RMMIs) and financial promotion rules apply, but there is no Financial Services Compensation Scheme (FSCS) coverage.
For non-crypto CFDs, COBS 22.5 sets maximum leverage for retail clients: 30:1 on major currency pairs, 20:1 on minor currency pairs, gold and major indices, 10:1 on commodities (excluding gold) and minor indices, and 5:1 on individual shares and other assets. The table below summarises the position for common bot-trading activities.
| Activity | Legal for UK retail? | Regulator / what to check |
|---|---|---|
| Running a bot on your own brokerage account | Yes | Your account, your responsibility |
| Trading shares or forex via an FCA-authorised broker | Yes | FCA Financial Services Register |
| Spot crypto trading via a bot | Yes, if exchange is FCA-registered for AML | FCA cryptoasset register |
| Crypto derivatives (CFDs, futures, options) | No, banned for retail | FCA COBS 22.6 |
| Crypto ETNs on a UK RIE | Yes, since 8 Oct 2025 | FCA; classified as RMMI |
| Non-crypto CFDs (forex, shares, indices) | Yes, with leverage caps | FCA COBS 22.5 |
| Offering a managed bot service to the public | Only if FCA-authorised | FSMA 2000 s.19 |
When a Bot Service Itself Is Illegal
A trading bot that you build or install on your own machine is simply software. It becomes a regulatory problem when a firm uses a bot to carry on regulated activities without authorisation. Two FSMA provisions matter here:
- Section 19 (the general prohibition): a firm that manages your money, deals in investments on your behalf, or arranges transactions for you must be FCA-authorised. A bot provider that takes custody of your funds or makes discretionary trading decisions is carrying on a regulated activity and must hold the relevant permissions.
- Section 21 (financial promotions): a person must not, in the course of business, communicate an invitation or inducement to engage in investment activity unless they are an authorised person or the content has been approved by one. Since 2023, the definition of investment in section 21 explicitly includes cryptoassets, so crypto bot promotions fall within scope.
The FCA has published warnings naming specific bot services that operate without authorisation. Examples on the FCA Warning List include Ai Trader Bot (warned June 2025), FX Automated Bot Trading (warned May 2023) and Trade Algo Bot (warned August 2025). Dealing with an unauthorised firm means you have no access to the Financial Ombudsman Service or the FSCS if something goes wrong.
Before depositing money with any bot provider, check the firm on the Financial Services Register at register.fca.org.uk and search the FCA Warning List at fca.org.uk/consumers/warning-list-unauthorised-firms. For more on spotting illegitimate bot services and common bot scams, see our companion guides.
Broker and Exchange Terms of Service
Even when a bot is fully legal under FCA rules, your broker or exchange may restrict automated trading through its own terms of service. Some platforms limit the number of API requests per second, prohibit certain order types from automated systems, or reserve the right to close accounts that generate excessive messaging traffic. This is a commercial restriction, not a criminal one: breaching a platform's terms may result in account suspension or closure but not prosecution.
Before connecting a bot, read the API documentation and fair-use policy of your chosen platform. Make sure your API key permissions match what the bot needs and that you understand any rate limits in place. Check whether the platform allows third-party software at all; some brokers require you to apply for API access separately. If you trade on a US exchange from a UK account, additional rules may apply; see our page on trading bot legality in the US.
Tax, Disclaimers and Next Steps
Profits from bot trading are subject to UK tax. Depending on whether HMRC classifies your activity as trading or investing, you may owe Capital Gains Tax or Income Tax on your returns. The rules around frequency of trades, level of organisation and profit-seeking intention all affect the classification. Rather than covering those details here, see our dedicated guide to trading bot taxes in the UK.
This is not financial advice. This is not legal advice. The information on this page is for educational purposes and reflects the regulatory position as of the date of publication. Rules change; always verify the current FCA Handbook and relevant legislation before acting on anything described above.
Frequently asked questions
Can I use a crypto trading bot legally in the UK?
Yes, provided the exchange is registered with the FCA for anti-money-laundering supervision. You can trade spot crypto through a bot on a registered platform. However, cryptoasset derivatives such as CFDs and futures remain banned for UK retail clients under FCA Handbook COBS 22.6. Always confirm the exchange's FCA registration status before depositing funds.
Do I need an FCA licence to run a trading bot?
No, if you are trading your own money on your own account. The FCA does not regulate the software itself. You only need FCA authorisation if you carry on a regulated activity for other people, such as managing their investments or arranging deals on their behalf. Running a bot for personal use is not a regulated activity.
Has the FCA banned any trading bot services?
The FCA has not banned trading bots as a category, but it has issued warnings against specific unauthorised firms using bot-related branding. Examples include Ai Trader Bot, FX Automated Bot Trading and Trade Algo Bot. These firms were not authorised or registered by the FCA. Search the FCA Warning List before dealing with any bot provider.
What are the CFD leverage limits for UK retail traders?
Under FCA Handbook COBS 22.5, retail clients face maximum leverage of 30:1 on major forex pairs, 20:1 on minor forex pairs, gold and major indices, 10:1 on commodities excluding gold and minor indices, and 5:1 on shares and other assets. Cryptoasset derivatives are not subject to leverage limits because they are banned outright for retail clients.