How Leverage and Margin Actually Work on a CFD Account
Understanding how leverage and margin work on a CFD account is the single most important risk-management lesson for any new trader, because it explains why small price moves can produce outsized gains or losses. Get the concept right and you'll size positions sensibly; get it wrong and a routine market wobble can wipe out an account far faster than expected.
What Leverage Actually Does
Leverage lets you open a position bigger than your deposit would normally allow. It's expressed as a ratio, like 30:1 or 10:1, meaning for every £1 of your own money, you can control £30 or £10 of market exposure.
Crucially, leverage doesn't change the profit or loss per pip — it changes how much of your own capital you need to put up to access that exposure. A £10,000 EUR/USD position moves the same in pips whether you funded it with £1,000 or £330 of margin. What changes is your return on capital deployed, in both directions.
Key points:
- Leverage is set by your broker within regulatory limits, not something you can invent
- UK retail clients trading CFDs fall under FCA leverage caps (commonly 30:1 for major FX pairs, lower for indices, shares and crypto-related products)
- Professional clients can apply for higher leverage, but usually lose some retail protections
- Leverage is a tool for capital efficiency, not a signal of how "aggressive" a trade should be
Before assuming a specific leverage tier, check the actual terms on your account type — broker rules and asset-class caps are compared at /brokers/index.html.
Margin: The Deposit Behind the Position
Margin is the cash your broker sets aside from your account balance to open and maintain a leveraged position. It isn't a fee and isn't spent — it's held as security and released back to your free balance once you close the trade.
Two margin figures matter:
- Initial margin — the amount required to open the position (position size ÷ leverage)
- Maintenance margin — the minimum equity needed to keep the position open as the market moves
For example, opening a position with £100,000 notional exposure at 30:1 leverage requires £3,333.33 of initial margin. That £3,333.33 sits locked in your account; the rest of your balance remains free to absorb floating losses or fund other trades.
Margin requirements vary by instrument, broker, and sometimes by time of day (some brokers increase margin around major news events or over weekends). Always check current requirements before sizing a trade — don't assume yesterday's numbers still apply.
Margin Level, Margin Calls, and Stop-Outs
This is where many traders get caught out: leverage ratio alone doesn't trigger a margin call — margin level does.
Margin level is calculated as:
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Margin Level (%) = (Equity ÷ Used Margin) × 100
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- Equity = account balance plus/minus floating profit or loss
- Used margin = the total margin currently locked across all open positions
As losses grow, equity falls, and margin level drops. Most brokers use tiered thresholds:
| Margin Level | What Typically Happens | |---|---| | Above 100% | Normal trading, margin call risk low | | Around 100% | Margin call warning — you may need to add funds or reduce exposure | | Around 50% (varies by broker) | Stop-out — broker starts closing positions automatically |
These percentages differ between brokers and platforms (MT4, MT5, and proprietary platforms like IG's own system may calculate slightly differently), so confirm the exact figures on your account rather than assuming a universal standard.
A Worked Example
Say you have £5,000 equity and open a position requiring £2,000 initial margin.
- Used margin: £2,000
- Free margin: £3,000
- Margin level: (£5,000 ÷ £2,000) × 100 = 250% — comfortable
If the trade moves against you and floating losses reach £2,500:
- Equity: £5,000 − £2,500 = £2,500
- Margin level: (£2,500 ÷ £2,000) × 100 = 125% — still open, but getting close to a margin call zone
This shows why watching margin level in real time matters more than just knowing your leverage ratio. A single large position can erode margin level far quicker than several smaller ones spread across correlated instruments.
Why Leverage Feels Riskier Than It Is (or Isn't)
Leverage gets blamed for losses, but the real culprit is almost always position size relative to account equity. Two accounts using identical 30:1 leverage can have wildly different risk profiles:
- Trader A: £5,000 account, opens 0.1 lots — modest exposure, small margin used
- Trader B: £5,000 account, opens 2 lots — same leverage cap, but vastly higher exposure and margin usage
Trader B isn't using "more leverage" in a regulatory sense — they're simply using more of the leverage available, which increases both potential profit and potential loss per pip.
Practical steps to keep this in check:
- Decide risk per trade as a percentage of equity (commonly 1–2%) before opening any position
- Use a position-size calculator rather than picking lot sizes by feel
- Check how spreads, commissions, and swaps compound over your holding period, since costs eat into the same equity that supports your margin — run the numbers at /cost-impact.html
Practical Checklist Before You Trade
A short pre-trade routine avoids most leverage and margin surprises:
1. Confirm the leverage tier on your specific account and instrument (retail vs professional) 2. Calculate required margin for your intended position size before clicking trade 3. Check your broker's margin call and stop-out percentages — these vary 4. Set a maximum risk per trade in pounds, not just in lots 5. Verify negative balance protection applies to your account type 6. Re-check margin requirements around high-impact news or rollover periods, when brokers may adjust them 7. Run a full cost audit — commissions, spreads, and swaps all draw down the same equity your margin depends on, so compare them properly at /audit.html
Building this into your routine — rather than trusting memory — is the single biggest upgrade most CFD traders can make.
Conclusion
Understanding how leverage and margin work on a CFD account comes down to separating three things: leverage sets your capital efficiency, margin is the deposit that supports it, and margin level is the real-time gauge that determines whether your positions stay open. Trading CFDs is inherently risky and leverage can amplify losses as easily as gains, so treat every position size decision as a margin-level decision first. For structured lessons on risk and platform mechanics, browse /school/index.html, and always confirm live broker-specific figures before you trade.
Key takeaways
- Leverage lets you control a larger position with a smaller deposit, but it magnifies both gains and losses equally
- Margin is the deposit your broker holds as security, not a fee — it's returned when you close the trade
- Margin level (equity ÷ used margin × 100) is what triggers margin calls and stop-outs, not your leverage ratio alone
- Higher leverage doesn't mean higher risk by itself — position size relative to your account is what actually matters
- FCA rules cap retail leverage (e.g. 30:1 on major FX pairs), though professional accounts can access more
- Use a cost and margin calculator before every trade — check /audit.html and compare broker margin rules at /brokers/index.html
Frequently asked questions
- What's the difference between leverage and margin?
- Leverage is the ratio that describes how much exposure you can control per pound of capital (e.g. 30:1). Margin is the actual cash amount your broker sets aside from your account to open and hold that position. Leverage is the multiplier; margin is the pound-and-pence deposit it produces.
- Does higher leverage mean I'll lose money faster?
- Not by itself. Leverage only changes how much margin a given position needs. Your actual risk comes from position size versus account equity. Two traders using the same leverage ratio can have completely different risk levels depending on how many lots they trade.
- What triggers a margin call on a CFD account?
- Most brokers calculate margin level as equity divided by used margin, multiplied by 100. When that percentage drops below a set threshold (often 100%, then a stop-out around 50%), the platform issues a margin call and may start closing positions automatically to protect the broker and you from a negative balance.
- Can I lose more than my deposit trading CFDs?
- With negative balance protection, which UK-regulated brokers must offer to retail clients, you cannot lose more than what's in your account. Without that protection (some professional or offshore accounts), losses can exceed your deposit, so always confirm this before trading.
- Is more leverage always available if I ask for it?
- For retail clients, FCA rules cap leverage at fixed maximums per asset class regardless of what you request. Professional client status can unlock higher leverage, but it also usually removes some protections like negative balance cover, so it's a trade-off worth checking carefully.