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Stock Market Margin Calculator

Calculate required margin for intraday, delivery, F&O futures and options trades

tuneTrade Details
Intraday (MIS) — 20% margin (5× leverage), auto-squared at day end
Stock / Contract Price (₹)
₹
Quantity
#
Lot Size
#
Margin Required
%
1%100%
20% = 5× leverage
Available Capital (₹)
₹
To calculate max lots/shares possible

functions Margin Formulas

Position Value = Price × Qty × Lot Size

Required Margin = Position Value × Margin% / 100

P&L / ₹1 move = Qty × Lot Size

Brokerage = ₹20 flat per order (discount broker)

Required Margin
₹—
Enter price and quantity
Position Value
₹—
Full contract size
P&L per ₹1 Move
₹—
Qty × Lot Size
Effective Leverage
—
Position ÷ Margin
Lots from Capital
—
Based on available capital
Brokerage (both sides)
₹40
₹20 flat per order
Margin
—%
Margin Required ₹—
Broker's Exposure ₹—
Margin Comparison — Same Position
Type Margin % Margin Req. Leverage

What is a Stock Market Margin Calculator?

Margin in stock trading is the minimum collateral (cash or securities) you must maintain to take a leveraged position. SEBI mandates SPAN + Exposure margins for F&O positions. For intraday equity trades, brokers offer 5–20× leverage, meaning you can control ₹10 Lakhs of stocks with ₹50,000–₹2 Lakh in your account.

Understanding margin requirements is critical — if your account value drops below the maintenance margin, you get a margin call requiring immediate top-up. This calculator computes required margin, maximum position size, brokerage, and profit/loss per point move for intraday and F&O trades.

lightbulb Example Calculation
Scenario: Intraday long in Reliance at ₹2,850 for 100 shares, 20% margin
1Position value = 100 × ₹2,850 = ₹2,85,000
2Required margin = ₹2,85,000 × 20% = ₹57,000
3P&L per ₹1 move = 100 × ₹1 = ₹100
✓ ₹57,000 margin controls ₹2.85L position — 5× leverage
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Frequently Asked Questions

Stock margin and F&O trading explained

What is the difference between SPAN and Exposure margin in F&O trading?
SPAN (Standard Portfolio Analysis of Risk) is the exchange-mandated minimum margin — it covers the maximum one-day loss under extreme market moves. Exposure margin is an additional buffer above SPAN. Total F&O margin = SPAN + Exposure. SPAN changes daily with volatility; it rises during high-volatility events (elections, RBI meetings), potentially triggering margin calls even without price movement.
How is intraday leverage different from delivery margin?
Delivery (CNC): 100% margin required — full price paid, shares credited to demat, held indefinitely, STT 0.1% both sides. Intraday (MIS): typically 20% margin (5× leverage), must close by day end, STT only 0.025% on sell side. Post SEBI's Peak Margin regulations (Dec 2021), intraday leverage was significantly reduced — most brokers now offer 5× or less.
What happens if my account balance drops below the required margin?
You receive a margin call — add funds by next trading day's start, else the broker auto-squares your position (with extra charges) at an unfavorable price. Worse, if the position moves further against you, your account can go negative and you're liable for the deficit. Always maintain 20–30% buffer above minimum margin.

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