A margin calculator shows the upfront capital you need to take and hold a position. For futures and option writing it combines SPAN margin (the exchange’s risk-based requirement) with an exposure margin buffer; option buyers pay only the premium. Pick a segment, enter price and quantity, and ATS estimates the total margin per lot.
Pick a stock and enter lot size and number of lots to estimate the margin required.
Margin is the upfront money the exchange requires you to deposit to open and hold a leveraged position. The ATS Margin Calculator estimates that requirement across equity intraday, equity delivery, futures and options so you can size a trade to your available capital before placing the order.
For futures and short (written) options the total margin is made up of two parts: SPAN margin — the exchange’s core risk-based requirement, derived from a portfolio risk model — and exposure margin, an additional buffer charged on top of SPAN. Buying an option is different: you simply pay the full premium, with no SPAN margin.
The figures here are transparent indicative estimates expressed as a percentage of contract value. Real SPAN and exposure margins are published by the exchange and change every day with volatility, so always confirm the exact requirement on your trading platform before you trade.
| Segment | SPAN | Exposure | Approx. total |
|---|---|---|---|
| Equity Intraday (MIS) | ~20% | — | ~20% (≈5x leverage) |
| Equity Delivery (CNC) | Full value | — | 100% of trade value |
| Futures | ~12.5% | ~3.5% | ~16% of contract value |
| Options — Buy | Full premium | — | Premium paid |
| Options — Sell / Write | ~12.5% | ~3.5% | ~16% of contract value |
SPAN margin is the exchange’s core risk-based requirement, calculated from a portfolio risk model. Exposure margin is an additional buffer charged on top of SPAN to cover extra risk. Your total margin is SPAN plus exposure.
Indicatively about 16% of the contract value at ATS — roughly 12.5% SPAN plus 3.5% exposure. For a ₹9,00,000 contract that is around ₹1,44,000. The actual SPAN is set by the exchange and changes daily.
Yes. Buying an option costs only the premium you pay. Selling or writing an option carries much larger risk, so it requires SPAN plus exposure margin similar to a futures position.
Yes. Equity intraday (MIS) needs roughly 20% of trade value (about 5x leverage), while equity delivery (CNC) requires the full 100% because you take delivery of the shares into your demat account.
No — they are transparent indicative estimates as a percentage of contract value. Real SPAN and exposure margins are published daily by the exchange and depend on volatility; always confirm the exact requirement on your trading platform before trading.