The current Bank Nifty lot size is 30 units for both futures and options. Every Bank Nifty trade must be placed in multiples of 30.
The cost of one option lot depends on its premium. For example, an option quoted at ₹200 costs ₹6,000 for one lot (₹200 × 30), before brokerage and other charges.
What Is the Current Bank Nifty Lot Size?
The Bank Nifty lot size is the number of units in one BANKNIFTY derivatives contract on NSE. You trade in whole lots, not individual units.
Calls and puts both use 30 units per lot. These are index units, not bank shares. Bank Nifty contracts settle in cash, so no shares change hands.
For other NSE indices, see our Nifty lot size guide.
Bank Nifty Futures Lot Size and Contract Value
Bank Nifty futures also use 30 units per lot. A futures contract's value, also called notional value, is:
Contract value = Futures price × 30
At a futures price of about 54,500, one lot is worth about ₹16.35 lakh. This is your market exposure, not the money you pay upfront. The upfront amount is the margin, covered below.
Bank Nifty Lot Size History
In each revision, existing monthly contracts kept the old quantity until they expired. For a few weeks, contracts with two different lot sizes traded side by side.
When Did Bank Nifty Lot Size Change from 35 to 30?
NSE announced the change on 3 October 2025. It took effect in stages:
Monthly contracts expiring up to 30 December 2025 kept the 35-unit lot size.
The January 2026 monthly contract, expiring on 27 January 2026, was the first with 30 units.
Existing quarterly contracts moved to 30 units after trading on 30 December 2025.
Will the Bank Nifty Lot Size Change Again?
It can. NSE reviews index lot sizes periodically under SEBI's contract-value framework. That framework requires index contracts to be worth at least ₹15 lakh when they are introduced.
The October 2025 revision used Bank Nifty's average closing level for September 2025. A large rise or fall in the index can lead to a new lot size, so check the current quantity before every trade.
Related: Bank Nifty: The Ultimate Guide
Bank Nifty 1 Lot Price: How Much Does an Option Cost?
Bank Nifty's one-lot price is not fixed. For an option buyer, it depends on the premium:
Premium payable = Premium per unit × 30 × Number of lots
Illustrative premiums. Figures exclude brokerage, taxes and other charges.
Premiums differ across strikes, expiries, and between calls and puts. Each contract needs its own calculation.
Compare live premiums on the AlgoTest Bank Nifty option chain. The last traded price is not a guaranteed fill price, so check executable quotes in your trading terminal.
How Much Margin Is Needed for One Bank Nifty Lot?
What you need upfront depends on your position.
Margin depends on the contract, volatility, your other positions and any hedges. It can change while a position is open.
Use the AlgoTest margin calculator for an estimate, then confirm your broker's requirement. For spreads, check all legs together, since legs may not fill at the same time.
Test your Bank Nifty rules before increasing quantity
Backtest your entries, exits and stop-loss rules on AlgoTest. Review drawdowns and losing streaks alongside profits before deciding how many lots fit your plan.
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How Does Lot Size Affect Bank Nifty Options P&L?
For an option you buy and later sell:
Gross P&L = (Exit premium − Entry premium) × 30 × Number of lots
Suppose you buy one lot at ₹200:
After charges, exiting at your entry price still means a small loss. If the option expires worthless, you lose the full premium plus charges.
For sellers, P&L is the entry premium minus the exit premium. The premium received does not cap the possible loss.
Does a 100-Point Bank Nifty Move Mean ₹3,000 Profit?
Not always. A 100-point change in the option premium changes one lot's value by ₹3,000.
A 100-point move in the index usually moves the premium by less. The premium change depends on delta, volatility and time to expiry. For futures, P&L is the change in the futures price × 30.
Is There a Bank Nifty Weekly Options Lot Size?
No. Bank Nifty weekly options ended with the final weekly expiry on 13 November 2024, under NSE circular FAOP64506.
Bank Nifty now has monthly and quarterly expiries only. Both use 30 units per lot. Expiry falls on the last Tuesday of the month, or the previous trading day if that Tuesday is a holiday. See our Bank Nifty expiry day guide for timings and rules.
An old weekly-expiry strategy needs more than a quantity update. The expiry, time to expiry and premium behaviour must also match what you trade today.
How Should You Use Lot Size When Backtesting?
An old one-lot result may use a different quantity from today's lot. Here is the same 40-point premium gain under two lot sizes:
The signal didn't change; only the quantity did. Losses scale the same way.
When reviewing a Bank Nifty backtest on AlgoTest:
Check how the test handles lot size across your selected dates.
Make sure the strategy uses expiries that are available today, especially if it was built on weekly contracts.
Include brokerage, charges and slippage before comparing results.
Look at drawdowns and losing streaks, not just the profit on single trades.
Our guide to backtesting options strategies shows how to turn your rules into a testable strategy.
How Many Bank Nifty Lots Should You Trade?
Start from how much you can afford to lose, not how much margin you have.
Say you buy at ₹200 with a stop-loss at ₹160. Your planned loss is ₹40 × 30 = ₹1,200 per lot, before charges and slippage. With two lots, that becomes ₹2,400.
A stop-loss does not guarantee your exit price. If both lots expire worthless, you lose the full ₹12,000 premium. For spreads, assess the combined risk of all legs together.
Test Your Bank Nifty Strategy at Today's Lot Size
Knowing the lot size is only the first step. To trade Bank Nifty with a plan, define your entry, exit, stop-loss and number of lots. Then check how the full setup performs at 30 units across past and live market conditions.
AlgoTest helps you move from an idea to a strategy you can inspect and test before deciding whether to deploy.
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