Calculating spread betting margins

Spread betting is a leveraged product, which means you only have to place a percentage of the full trade value to open a position. For example, if you placed a spread bet on a share you would need to deposit 20% of the full trade value as the margin requirement. View our margin rates on popular markets.

A pie chart showing the margin requirement for a spread betting trade

The margin you will be required to deposit reflects a percentage of the full value of the position you wish to open. We refer to this as 'position margin' on our platform. The position margin will be calculated using the applicable margin rates, as shown in the product library area on the platform.

​For shares, different margin rates may apply depending on the size of your position or the tier of your position (or a portion of your position) in that instrument. ​The portion of the position that falls within each tier is subject to the margin rate applicable to that tier.

​In order to calculate the position margin, the level 1 mid-price (shown on the trading platform) is used.

Position margin example

Company ABC (GBP) margin rates

TierPosition size (stake)Margin rate
CMC Markets

Based on the margin rates in the table below for Company ABC (GBP), a position of £65 per point, using the level 1 mid-price of 275.0 (£2.75), would require a position margin of £5,018.75.

​Your position margin requirement is calculated as follows: 

TierPosition sizeMargin rateMargin
10 x 275 x 20% = £550
20 x 275 x 25%  = £1,375
20 x 275 x 30% = £1,650
15 x 275 x 35% = £1,443.75
5 050% 0
Total = £5,018.75

The notional value of your total position is: £17,875.00 (65 x 275).

​​Spread betting using margin allows you to open a position by only depositing a percentage of the full value of the position. This means that your losses will be amplified and you could lose all of your capital. Profits and losses are relative to the full value of your position. Learn more about our trading fees.

Spread betting using margin is not necessarily for everyone and you should ensure you understand the risks involved and if necessary seek independent professional advice before placing any spread bets.

See our spread betting guides to further your learning and consult our trading costs page. Compare our award-winning Next Generation platform features to MetaTrader 4: ​choose the best trading platform for you and tailor it for your individual trading needs: Next Generation vs MetaTrader 4

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Disclaimer: ​CMC Markets is an execution-only service provider. The material (whether or not it states any opinions) is for general information purposes only, and does not take into account your personal circumstances or objectives. Nothing in this material is (or should be considered to be) financial, investment or other advice on which reliance should be placed. No opinion given in the material constitutes a recommendation by CMC Markets or the author that any particular investment, security, transaction or investment strategy is suitable for any specific person. The material has not been prepared in accordance with legal requirements designed to promote the independence of investment research. Although we are not specifically prevented from dealing before providing this material, we do not seek to take advantage of the material prior to its dissemination.

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