# Bank Nifty Lot Size (2026): Current Quantity and One-Lot Cost Author: AlgoTest Author URL: https://algotest.in/blog/author/algotest/ Published: 2026-09-29 Category: General Category URL: https://algotest.in/blog/category/general/ Meta Description: Know the current Bank Nifty lot size, how much one lot costs, the margin you need and why it changed from 35 to 30. Includes P&L examples. Tags: algo trading india, options trading Tag URLs: algo trading india (https://algotest.in/blog/tag/algo-trading-india/), options trading (https://algotest.in/blog/tag/options-trading/) URL: https://algotest.in/blog/bank-nifty-lot-size-2026-current-quantity-and-one-lot-cost/ 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. Number of lots Total quantity 1 30 units 2 60 units 5 150 units 10 300 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](https://algotest.in/blog/nifty-lot-size/). ## 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 Lot size Applied from NSE circular 15 Before November 2024 Not applicable 30 New contracts from 20 November 2024 Issued 18 October 2024 35 New contracts from 25 April 2025 (first monthly expiry: July 2025) FAOP67372, 28 March 2025 30 First monthly expiry: 27 January 2026 FAOP70616, 3 October 2025 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](https://algotest.in/blog/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** Option premium per unit Cost of 1 lot Cost of 2 lots ₹50 ₹1,500 ₹3,000 ₹100 ₹3,000 ₹6,000 ₹200 ₹6,000 ₹12,000 ₹300 ₹9,000 ₹18,000 _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](https://algotest.in/banknifty-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. Position What you need upfront Buy one option lot Premium per unit × 30, plus charges Sell one option lot The margin set by the exchange and broker. The premium you receive is not your margin. Trade one futures lot Futures margin, which is a fraction of the contract value. Losses can require more funds. 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](https://algotest.in/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.](https://algotest.in/?utm_source=blog&utm_medium=internal&utm_campaign=seo&utm_content=main-page&utm_term=algotest&utm_source=blog&utm_medium=internal&utm_campaign=seo&utm_term=algotest&utm_content=main-page) Review drawdowns and losing streaks alongside profits before deciding how many lots fit your plan. > > [Sign up on AlgoTest](https://algotest.in/register?utm_source=blogs&utm_medium=organics&utm_campaign=seo&utm_source=blogs&utm_medium=organics&utm_campaign=seo) ### 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: Exit premium Change per unit Gross P&L for 1 lot ₹240 +₹40 +₹1,200 ₹200 ₹0 ₹0 ₹160 −₹40 −₹1,200 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**](https://algotest.in/blog/black-scholes-option-pricing-model) 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](https://algotest.in/blog/bank-nifty-expiry-day/) 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: Quantity per lot Gross profit for 1 lot 35 units ₹1,400 30 units ₹1,200 The signal didn't change; only the quantity did. Losses scale the same way. When reviewing a Bank Nifty backtest on [AlgoTest](https://algotest.in/?utm_source=blog&utm_medium=internal&utm_campaign=seo&utm_content=main-page&utm_term=algotest&utm_source=blog&utm_medium=internal&utm_campaign=seo&utm_term=algotest&utm_content=main-page): - 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](https://algotest.in/blog/how-to-backtest-options-trading-strategies-with-examples/) 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](https://algotest.in/blog/trail-stop-loss-to-break-even-price-when-backtesting) 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](https://algotest.in/) helps you move from an idea to a strategy you can inspect and test before deciding whether to deploy. Join us as we simplify algo trading in India. Start Free ## FAQs Q: Does Bank Nifty still have weekly expiry? A: No. Bank Nifty's last weekly expiry was 13 November 2024. It now has monthly and quarterly expiries only. Q: Will the Bank Nifty lot size change again? A: It can. NSE reviews index lot sizes periodically based on contract value, so a large move in the index can lead to a revision. Always check the current lot size before trading. Q: What is the Bank Nifty lot size in 2026? A: As of 29 September 2026, Bank Nifty futures and options have a lot size of 30 units. Confirm the contract's quantity in your broker's order window before trading. Q: Is Bank Nifty lot size 30 or 35? A: It is 30. The 35-unit size applied to contracts from April 2025 until the January 2026 monthly expiry series introduced 30 units. Older articles may also show 15, which applied before November 2024. Q: What is the price of 1 lot of Bank Nifty options? A: Multiply the option premium by 30. At a ₹200 premium, one lot costs ₹6,000 before brokerage and charges. There is no fixed one-lot price. Q: Can I buy one Bank Nifty option lot with ₹5,000? A: It depends on the premium. At ₹150, one lot costs ₹4,500 before charges. At ₹200, it costs ₹6,000. Affording the premium does not make a trade low risk, and the full premium can be lost. Q: Are Bank Nifty futures and options lot sizes the same? A: Yes. Futures, calls and puts all use 30 units per lot, although option premiums differ. Q: Can I trade 15 units of Bank Nifty options? A: No. The minimum order is one lot of 30 units, and orders must be in multiples of 30. --- This blog is powered by Superblog. Visit https://superblog.ai to know more. ---