Physical Settlement in Indian F&O: Lot Sizes, Delivery and Taxes

What Physical Settlement Actually Means

Physical settlement is the process where an open derivative position at expiry is closed by the actual movement of the underlying shares between demat accounts, instead of just exchanging the cash difference in price. In a cash settlement, only the net gain or loss is debited or credited. In physical settlement, the buyer pays the full contract value and the seller delivers the full quantity of shares.

In the Indian market this matters only for single-stock derivatives. Every stock futures contract and every stock options contract on the NSE that is still open on expiry day gets physically settled. The key word is open. If you close, square off, or roll your position before the market closes on expiry day, nothing is delivered and you simply book your profit or loss in cash. Physical settlement is only triggered by what is left unclosed at the final bell.

This is one of the most misunderstood rules among retail traders. Many believe that buying a cheap out-of-the-money option is a low-risk bet. But if that option drifts into the money near expiry and you forget about it, you can suddenly owe delivery worth several lakh rupees on a contract you paid only a few thousand for.

Which Contracts Are Physically Settled in India

SEBI made physical settlement mandatory for stock derivatives in a phased manner. The rollout began in 2018 with a first batch of 46 stocks and was completed by the expiry of October 2019, after which all stock futures and stock options on the NSE became compulsorily delivery based. Index derivatives were deliberately left out.

So the simple rule to memorise is this. Index equals cash, single stock equals physical. A Nifty option that expires in the money is settled by paying the intrinsic value in rupees. A Reliance option that expires in the money is settled by delivering or receiving 500 Reliance shares.

Delivery Happens at Lot Level, Not Per Share

The single most important practical fact is that F&O delivery is measured in lots, and one lot is many shares. The old generic idea of settling 100 shares of some company does not reflect the real exchange specifications. Each stock has its own lot size fixed by the NSE, and it is usually several hundred shares. That is what determines how much money or how many shares you actually owe.

Note that index lot sizes are completely different and those products are cash settled anyway. For reference, the Nifty lot is 65, Bank Nifty is 30, FinNifty is 60 and Sensex is 20. You will never take delivery on these. The lot table above only matters for single stocks, where delivery is real.

A Fully Worked Example with Reliance Futures

Suppose on the monthly expiry you are long one lot of Reliance futures. Reliance has an illustrative lot size of 500 shares. You bought the future at Rs 2,850 and on expiry day Reliance settles at Rs 2,900. You did not square off before the close, so the position goes to physical settlement. As a buyer of the future, you must take delivery of 500 Reliance shares and pay the full settlement value.

• Shares to receive: 500 (one lot).
• Settlement price: Rs 2,900 per share.
• Cash you must pay for delivery: 500 multiplied by Rs 2,900, which is Rs 14,50,000.
• Your futures profit before costs: (2,900 minus 2,850) multiplied by 500, which is Rs 25,000. This is illustrative and not a promise of returns.
• Delivery STT at 0.1 percent on Rs 14,50,000: about Rs 1,450.
• Brokerage, exchange and stamp charges: typically a few hundred rupees more depending on your broker.

The critical point is the cash flow. Your screen showed a gain of Rs 25,000 on the future, but on expiry you must arrange Rs 14,50,000 in your trading account to actually receive the shares. Many small accounts cannot fund this. If you do not have the money, your broker will square off your position before expiry to avoid delivery, or if it goes to settlement and you cannot pay, the trade is auctioned and you bear the penalty and price difference.

A Worked Example with an HDFC Bank Option

Now take options, where the surprise risk is higher. Assume HDFC Bank has an illustrative lot size of 550 shares and trades at Rs 1,700. You buy one lot of the 1,680 call option for a premium of Rs 30 per share. Your cost is 30 multiplied by 550, which is Rs 16,500. You forget about it and it expires with the stock at Rs 1,710, so the call is in the money by Rs 30.

Because in-the-money stock options are physically settled on exercise, you do not just receive the Rs 30 intrinsic value in cash. You are obligated to buy 550 HDFC Bank shares at the strike of Rs 1,680. That is a delivery obligation of 1,680 multiplied by 550, which is Rs 9,24,000 that must be funded on settlement.

• Premium paid: Rs 30 times 550, that is Rs 16,500.
• On exercise you buy 550 shares at Rs 1,680, total outlay Rs 9,24,000.
• Shares are worth Rs 1,710 in the market, so notional value is 1,710 times 550, that is Rs 9,40,500.
• Gross intrinsic gain: (1,710 minus 1,680) times 550, that is Rs 16,500, which roughly offsets your premium in this illustrative case.
• Delivery STT on exercised in-the-money options is charged at 0.125 percent of the intrinsic settlement value, plus brokerage and demat charges when you later sell.

What Happens If You Cannot Deliver: Auction and Penalty

If a seller is obligated to deliver shares but does not have them in their demat account, or a buyer is obligated to take delivery but cannot fund it, the clearing corporation steps in. The shortfall goes into an auction where the missing shares are bought or sold in the market, and the defaulting party pays the difference plus a penalty. This is why brokers proactively warn you and often square off risky positions on expiry day.

Brokers also apply much higher margins in the final days before expiry for positions likely to result in delivery. These are called physical settlement margins or expiry day margins and they ramp up sharply in the last few sessions for in-the-money and close-to-the-money contracts. The intention is to make sure you either have the funds or square off in time, rather than create a delivery default.

• Day before expiry and expiry day: extra delivery margin blocked on positions that may go to settlement.
• Failure to honour delivery: shortfall goes to auction, you pay the auction price difference.
• Penalty: a percentage penalty is levied on the value of the defaulted delivery, over and above the auction loss.
• STT shock: STT on physically settled trades is charged at the delivery equity rate, far higher than the F&O rate, which surprises many traders.

The STT Shock You Must Plan For

This is the part that catches even experienced traders. When an F&O position is squared off, Securities Transaction Tax is charged at the low derivatives rate. But when a position is physically settled, STT is charged as if you bought or sold delivery based equity, at 0.1 percent on both buy and sell legs of the full contract value. On a Rs 14,50,000 Reliance delivery, that 0.1 percent alone is about Rs 1,450 per leg, which can be many times larger than the STT you would have paid by simply squaring off.

For exercised in-the-money options the STT treatment is also at the higher delivery linked rate on the intrinsic value, around 0.125 percent. The lesson is simple. Squaring off before expiry is almost always cheaper than letting a position go to physical settlement, unless you genuinely want the shares. Treat physical settlement as a deliberate choice, not an accident.

How F&O and Delivered Shares Are Taxed

Tax treatment confuses many traders here, so keep two stages separate. First, your profit or loss on the futures or options trade itself is treated as business income under Indian tax rules and is taxed at your applicable slab rate. F&O is non speculative business income, so it does not attract the STCG or LTCG capital gains rates while it is a derivative position.

Second, once physical settlement delivers actual shares into your demat account, those shares become a normal equity holding. When you later sell them, the capital gains rules apply from that point. If you sell within one year you pay Short Term Capital Gains at 20 percent. If you hold beyond one year you pay Long Term Capital Gains at 12.5 percent on gains above Rs 1.25 lakh in a financial year. The acquisition cost is the settlement price at which the shares were delivered to you.

Why SEBI Moved to Physical Settlement

Before 2018, all stock derivatives in India were cash settled. This allowed very large speculative positions to be carried into expiry with no real link to the underlying shares. SEBI wanted to tie the derivatives market more closely to the actual cash market, reduce manipulation around expiry, and discourage purely speculative bets that had no intention of dealing in the real stock.

By forcing delivery, SEBI ensured that anyone carrying a stock position into expiry must be able to handle real shares. This improved price discovery in the cash market, reduced expiry day manipulation in individual stocks, and made the market more disciplined. The trade off is more operational work for traders, which is exactly why understanding the mechanics is now essential.

How to Avoid Accidental Delivery

For the vast majority of retail traders who do not want shares, the goal is simple. Never carry an open single stock F&O position into the expiry close unless you intend to deliver or receive. Build a routine around the last two sessions of every expiry so you are never caught by surprise.

• Mark expiry dates for every stock position. Stock and index expiries are on the last Tuesday of the month for monthly contracts, subject to the current NSE calendar.
• Two days before expiry, list every single stock F&O position you still hold.
• Square off any stock position you do not want to settle physically, even deep in the money options.
• If you genuinely want delivery, make sure full funds or the full quantity of shares are available in your account before expiry.
• Watch for the higher expiry day margins your broker will block, and keep spare cash so a margin call does not force an unwanted square off at a bad price.

Physical vs Cash Settlement at a Glance

In short, cash settlement is simpler and cheaper for the trader, while physical settlement ties the contract to the real stock and removes pure speculation at expiry. Knowing which bucket your contract falls into is the difference between a clean exit and a surprise lakhs sized obligation.

Sources and Further Reading

For authoritative data and current contract specifications, refer to SEBI, NSE India, the NSE Option Chain and CDSL. Lot sizes, STT rates and margin rules change, so always confirm the current specification for your stock and expiry on the official source before you trade. All numbers in this guide are illustrative and are not a promise of returns.

Sources and Further Reading

For authoritative data and further reading on this topic, refer to SEBI (Securities and Exchange Board of India), NSE India, NSE Option Chain and CDSL. Always confirm current rules, rates and contract specifications on the official source before you trade.