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Forex Margin Calculator

Calculate the required margin for a trade. Choose between fixed-leverage brokers (e.g. 1:100) or brokers that use tiered margin structures where larger positions attract higher margin rates.

Margin Calculator

Calculate required margin for a trade

e.g. 100 for 1:100

Auto-filled from symbol

Base currency of the symbol

What is Forex Margin?

Margin is the collateral your broker requires you to deposit to open and maintain a leveraged position. It is not a fee — it is a good-faith deposit held by your broker as security.

Fixed leverage vs. tiered margin

Fixed leverage brokers apply a single margin rate to the entire position regardless of size. If your leverage is 1:100, your margin rate is 1%.

Tiered margin (used by most regulated brokers in the EU and UK under ESMA/FCA rules) applies increasing margin rates to larger position sizes:

  • First X lots at 1% margin
  • Next Y lots at 2% margin
  • Remaining lots at 5%+ margin

Formula

Fixed: Margin = (Lot Size × Contract Size × Price) / Leverage

Tiered: Sum the margin for each portion of the position falling within each tier: Tier Margin = (lots in tier × Contract Size × Price) × Margin Rate