Futures Contract Margin Calculator

Futures margin is not a loan. It is a good-faith deposit, formally a performance bond, held by the exchange to cover potential losses on an open position.

Core formulas: Initial Margin = Contract Value × Initial Margin Rate Maintenance Margin = Initial Margin × Maintenance Percentage Margin Call Level = Account Equity < Maintenance Margin

Exchanges publish maintenance as a flat dollar figure per contract, and it usually lands around 75 to 90% of initial. This page asks for it as a percentage of initial margin, which is how brokers present it and which keeps the two numbers locked together. Quote it as a percentage of contract value instead and you get a very different answer: on a 5% initial margin, 80% of initial is 4% of contract value.

Initial vs. Maintenance margin:

• Initial margin: Required to open a new position (typically 5-15% of contract value)
• Maintenance margin: Minimum equity required to keep the position open (usually 75-85% of initial)
• When account equity falls below maintenance, a margin call is issued. Deposit more funds or the broker closes the position, usually without waiting long

Leverage calculation: Leverage = Contract Value / Initial Margin

A $250,000 E-mini S&P 500 contract with $12,500 initial margin = 20× leverage.

Worked example: You buy 2 contracts of Crude Oil (CL). Contract value = 1,000 barrels × $80/barrel = $80,000 each, so $160,000 total. Initial margin rate = 5%, so initial margin = $160,000 × 5% = $8,000. Maintenance = 80% of initial = $8,000 × 80% = $6,400.

The buffer between the two is $1,600, and that is the whole cushion the position has. Divide it by 2,000 barrels and you get $0.80 per barrel: oil falling from $80.00 to $79.20 puts the account on a margin call. That is a 1% move in the underlying, which crude does on a quiet afternoon.

A common way to get this wrong is to stop at the per-contract loss. Oil dropping $0.64 costs $640 per contract, which sounds close to the $1,600 buffer until you remember there are two contracts: the real loss is $1,280, and the account still has $320 of room. The buffer is a total, so compare it against the total loss.

Typical margin requirements, US contracts, approximate 2025–2026. These are CME products quoted in US dollars; a DAX or Nikkei contract carries its own requirement in its own currency.

• ES (S&P 500 E-mini): ~$12,000 initial / ~$10,800 maintenance
• NQ (Nasdaq E-mini): ~$17,000 initial / ~$15,300 maintenance
• CL (Crude Oil): ~$8,000 initial / ~$7,200 maintenance
• GC (Gold): ~$10,000 initial / ~$9,000 maintenance

Day trade margins are often reduced to 25-50% of overnight margins by many retail brokers, and some discount futures brokers go far below that on liquid index contracts. The catch is that the reduction only holds while the position is intraday: carry it past the session close and the full overnight requirement applies immediately, which is how a small account gets a margin call at 4pm on a trade that was fine all day.

Exchanges can also raise margin requirements on short notice during volatile periods, and they do it to everyone at once, mid-position. That is worth planning for rather than discovering.