NSE BankNifty Options Margin & Expiry Payoff Calculator

Simulate BankNifty Call/Put buying & selling margins, lot sizes, breakevens, and revised 0.1% STT statutory taxes for intraday and expiry trading on NSE.

NSE Lot 15 Rules

Trade Parameters

Step 1 of 2

Position

Option Type

BankNifty Spot Index

Strike Price (₹)

Lots

Lot Size

Product

Entry Premium (₹)

Exit / Target Premium (₹)

Net P&L, Margin & Statutory Taxes (₹)

BUY CE · 30 Qty

Capital / Margin Required

₹8,400

Gross P&L

+ ₹4,200

Net In-Hand Take Home

+ ₹4,118

Breakeven Index 51,480

Estimated Delta + 0.52

Daily Theta Decay - ₹32 / day

Risk / Reward 1 : 1.50

Brokerage (₹20 per executed order) ₹40.00

STT / CTT (Revised 0.1% on Sell Value) ₹12.60

NSE Transaction Charges + GST (18%) ₹29.40

Total Statutory Slippage & Taxes - ₹82.00

Net Take-Home Trading Profit + ₹4,118.00

Key Rules for Trading BankNifty Options on NSE in 2026

SPAN Margin for Option Sellers

Writing naked BankNifty options requires approximately ₹75,000 to ₹95,000 per lot in SPAN + Exposure margin. Buying deep OTM hedges (spread trading) can reduce this margin requirement by up to 65% through portfolio margin benefits.

Post-Budget STT Impact

The revised Securities Transaction Tax (STT) rate of 0.1% applies on option premium sell orders. Always calculate net points needed after brokerage (₹40 roundtrip), STT, and 18% GST before scaling lot sizes.

Weekly Expiry Dynamics

BankNifty monthly & weekly contracts experience severe non-linear Theta decay in the final 2 hours of expiry day (1:30 PM to 3:30 PM IST). Ensure stop-losses are placed in system rather than mental triggers.