This guide provides a comprehensive comparison between CMC Markets and Interactive Brokers, two prominent brokerage firms. We examine trading conditions, platform features, fee structures, regulatory frameworks, and key risks. Whether you are a novice trader or a seasoned professional, understanding the differences between these brokers is essential for making an informed choice. Always verify current details directly on the official websites of CMC Markets and Interactive Brokers, and consult the relevant regulatory registers for up-to-date licensing information.
CMC Markets is a UK-based online trading provider founded in 1989. It specialises in spread betting, CFDs, and forex trading, offering access to thousands of markets including shares, indices, commodities, and treasuries. CMC Markets is publicly listed on the London Stock Exchange and is regulated by the Financial Conduct Authority (FCA) in the UK, among other global regulators. The broker is known for its proprietary Next Generation trading platform, which features advanced charting and risk management tools.
Interactive Brokers (IBKR) is a US-based brokerage firm founded in 1978. It is one of the largest electronic trading platforms in the world, providing access to stocks, options, futures, forex, bonds, and funds across more than 150 markets. IBKR is regulated by multiple top-tier authorities, including the US Securities and Exchange Commission (SEC), the Financial Industry Regulatory Authority (FINRA), and the FCA in the UK. Interactive Brokers is renowned for its low costs, powerful Trader Workstation (TWS) platform, and institutional-grade execution.
Both CMC Markets and Interactive Brokers are highly regulated, offering strong client protection. The table below summarises their primary regulatory frameworks.
| Feature | CMC Markets | Interactive Brokers |
|---|---|---|
| Primary Regulator | FCA (UK) – No. 173730 | SEC, FINRA (US), FCA (UK) |
| Client Fund Segregation | Yes (FCA requirements) | Yes (SEC/FINRA requirements) |
| Investor Protection | FSCS up to £85,000 | SIPC up to $500,000 (securities) |
| Negative Balance Protection | Yes (retail clients) | Limited (depends on jurisdiction) |
| Global Licences | FCA, ASIC, MAS, etc. | SEC, FINRA, FCA, IIROC, etc. |
Both brokers maintain strong financial positions and are publicly listed (CMC Markets on the LSE; Interactive Brokers on NASDAQ). This transparency adds an extra layer of trust. Always verify the regulatory status of the specific entity you are dealing with, as both brokers operate through multiple legal entities depending on your jurisdiction.
Fee structures are a critical factor when choosing a broker. The table below compares the key costs associated with trading on CMC Markets and Interactive Brokers.
| Fee Type | CMC Markets | Interactive Brokers |
|---|---|---|
| Forex Spread (EUR/USD) | From 0.7 pips (Standard) | From 0.1 pips (plus commission) |
| Forex Commission | None (spread-based) | From $2.00 per side (Tiered) |
| Stock/ETF Commission | CFDs only (spread-based) | $0.005 per share (or tiered) |
| Options Commission | CFDs only | $0.65 per contract (Tiered) |
| Inactivity Fee | None | None (for accounts over $100k) |
| Minimum Deposit | $0 (no minimum) | $0 (no minimum) |
| Withdrawal Fee | Free (first withdrawal per month) | Free (limited number per month) |
CMC Markets operates on a spread-only model for its CFDs, while Interactive Brokers uses a low-spread plus commission model, particularly for forex. For active traders, IBKR's commission-based structure can be more cost-effective, especially for large volumes. However, CMC Markets' no-commission model is simpler and may be more suitable for casual traders.
Both brokers offer robust trading platforms, but they cater to different user preferences. CMC Markets provides its proprietary Next Generation platform, while Interactive Brokers offers the industry-standard Trader Workstation (TWS) and a web-based Client Portal.
Key features: Advanced charting with 80+ technical indicators, pattern recognition, risk management tools, and a user-friendly interface. Available as a web-based platform, desktop app, and mobile app (iOS/Android). Offers one-click trading and price alerts.
Key features: Professional-grade platform with market scanners, options analytics, algorithmic trading, and extensive order types. TWS is powerful but has a steeper learning curve. Also available via web (Client Portal) and mobile app. Supports third-party platforms like TradingView and MetaTrader.
For traders who prioritise ease of use and intuitive design, CMC Markets' Next Generation is often preferred. For professionals who require advanced analytics, customisation, and access to global markets, Interactive Brokers' TWS is unmatched.
CMC Markets and Interactive Brokers offer different account structures. CMC Markets provides a straightforward account model, while Interactive Brokers offers multiple account types tailored to different client profiles.
| Account Feature | CMC Markets | Interactive Brokers |
|---|---|---|
| Account Types | Standard, Professional, Corporate | Individual, Joint, Trust, IRA, Corporate, Advisor |
| Minimum Deposit | No minimum (for CFD accounts) | No minimum (but $100 to trade forex) |
| Base Currencies | GBP, USD, EUR, AUD, SGD, CAD | 20+ currencies including USD, EUR, GBP, JPY |
| Demo Account | Yes (free, $10,000 virtual funds) | Yes (free, paper trading) |
| Islamic Account | Yes (swap-free) | Not specifically offered |
| Margin Rates | Competitive, varies by instrument | Low margin rates, tiered based on volume |
Both brokers offer demo accounts, which are ideal for testing platforms and strategies before committing real funds. CMC Markets' no-minimum deposit is attractive for beginners, while Interactive Brokers' wide range of account types caters to diverse needs, including institutional and retirement accounts.
The range of tradable instruments is another key differentiator. CMC Markets focuses heavily on CFDs and spread betting, while Interactive Brokers offers direct access to global securities and derivatives.
Instruments: Forex (80+ pairs), Indices (20+), Shares (9,000+ CFDs), Commodities, Treasuries, ETFs, and Cryptocurrencies (CFDs). Primarily offers leveraged products.
Instruments: Stocks (over 100,000), Options, Futures, Forex (100+ pairs), Bonds, Mutual Funds, ETFs, and Cryptocurrencies (direct and futures). Offers real ownership of securities, not just derivatives.
If you are seeking to trade CFDs with leverage and a broad range of underlying markets, CMC Markets is a strong choice. If you require direct ownership of stocks, options, futures, and access to global exchanges with low-cost execution, Interactive Brokers is superior.
Selecting between CMC Markets and Interactive Brokers depends on your trading style, experience, and objectives. Use this practical checklist to guide your decision.
Scenario: A trader in the UK has a capital of £10,000 and wants to trade both forex and UK stocks. They are considering CMC Markets and Interactive Brokers.
CMC Markets approach: The trader opens a CFD account with CMC Markets. They trade GBP/USD with a spread of 0.9 pips and trade UK shares as CFDs with no commission but a spread markup. The platform is easy to use, and the trader benefits from the FSCS protection (£85,000). The trader also enjoys the tax-free spread betting option available in the UK.
Interactive Brokers approach: The trader opens an account with Interactive Brokers. They trade forex with a spread of 0.1 pips plus a $2.00 commission per side. They buy actual UK shares directly, paying a low commission of $0.005 per share. The trader uses TWS for advanced charting and also trades options for hedging. IBKR's margin rates are lower, allowing more efficient use of capital.
Outcome: The trader chooses Interactive Brokers because they prefer direct stock ownership, lower long-term costs for active trading, and the advanced tools offered by TWS. They also benefit from IBKR's global reach and multi-currency capabilities.
Takeaway: The right choice depends on your trading frequency, instrument preferences, and whether you prefer derivatives (CFDs) or direct market ownership.
The following table summarises the key advantages and disadvantages of each broker.
| Criteria | CMC Markets | Interactive Brokers |
|---|---|---|
| Best For | CFD and spread betting traders, beginners, retail investors | Professional traders, investors, institutional clients |
| Platform Ease | High – intuitive, user-friendly | Low to medium – steep learning curve |
| Cost (Forex) | Spread-only (higher spreads, no commission) | Low spreads + commission (cheaper for high volume) |
| Product Range | Extensive CFDs on shares, indices, forex, commodities | Direct stocks, options, futures, bonds, forex, crypto |
| Regulation | FCA, ASIC, MAS (Tier-1) | SEC, FINRA, FCA, IIROC (Tier-1) |
| Leverage (Retail) | Up to 1:30 (FCA) | Up to 1:50 (FCA), higher for professionals |
| Minimum Deposit | No minimum | No minimum (but $100 for forex) |
| Tax Benefits (UK) | Spread betting is tax-free | Capital gains tax may apply |
Traders often make these mistakes when comparing CMC Markets and Interactive Brokers:
Trading forex and other leveraged instruments on either platform involves significant risks. Understanding these risks is essential for protecting your capital.
Currency prices can fluctuate rapidly due to economic news, geopolitical events, and market sentiment. Volatility can lead to significant gains but also substantial losses.
Leverage amplifies both profits and losses. With high leverage, even a small adverse price movement can result in a margin call or liquidation. Use leverage cautiously.
In times of market stress, liquidity may dry up, making it difficult to execute trades at desired prices. This can occur during major news events or outside of regular trading hours.
While both brokers segregate client funds, there is always a theoretical risk of the broker's insolvency. The FSCS and SIPC provide some protection, but they are not unlimited guarantees.
Trading forex, CFDs, and other leveraged instruments carries a high level of risk and may not be suitable for all investors. Leverage can amplify both gains and losses, and it is possible to lose more than your initial investment. CMC Markets and Interactive Brokers offer risk management tools, but they do not eliminate trading risk.
This guide is for informational and educational purposes only and does not constitute financial, investment, or legal advice. You should seek independent advice from a qualified financial professional before making any trading decisions.
We strongly recommend that you review the full risk disclosure documents available on the official CMC Markets and Interactive Brokers websites and consult with a regulated financial advisor if you are unsure about any aspect of trading. Never invest money you cannot afford to lose.