Premium: what you actually pay

Why is this important?

You've seen "NIFTY 25,000 CE @ ₹120" a dozen times in this course already. Most beginners read that as "this option costs ₹120." It doesn't. It costs ₹120 per unit, and NSE trades this in lots of 65 units, so the actual debit from your account is ₹7,800. Miss that ×65, and every risk calculation you do afterward is wrong.

But there's a second, deeper reason to care: ₹120 is not one number, it's two numbers glued together: intrinsic value and time value. Once you can split a premium in your head, you stop asking "is ₹120 cheap or expensive?" and start asking the right question: "what exactly am I paying for?"

Real market example

NIFTY is trading at 25,000. Look at three call options on the board at the same moment, all expiring the same week:

Why is the 24,800 CE's intrinsic value exactly ₹200? Because that strike already lets you "buy" NIFTY at 24,800 when the market is at 25,000: a real, lockable ₹200 advantage right now, before expiry even arrives. That's what in the money means: exercising today would already be profitable.

The 25,000 and 25,200 strikes have zero intrinsic value. Exercising them today would mean buying NIFTY at 25,000 or 25,200 when the market is already at 25,000. No advantage, so intrinsic value is ₹0 for both. Every rupee anyone pays for these two options is pure time value: a bet that NIFTY moves further before the week ends.

Now notice something easy to miss: the ATM 25,000 CE carries the most time value of the three (₹120), more than either the ITM or the OTM strike. That's not a coincidence: it's the strike where nobody knows yet whether it will finish ITM or OTM, so it carries the most uncertainty, and uncertainty is exactly what time value is pricing.

One honest footnote: the ₹7,800 you pay isn't the only cost. Brokerage, STT (Securities Transaction Tax), exchange charges and GST all nibble at both entry and exit. On a ₹7,800 premium these are usually small, but they are never zero, and they add up if you trade often.

Key concepts

• Premium: the total per-unit price of an option, always equal to intrinsic value plus time value. Multiply by lot size (65) to get what actually leaves your account.
• Intrinsic value: for a call, max(0, spot price − strike price). It's the profit you'd lock in by exercising this instant. It can never be negative; the worst it gets is ₹0.
• Time value: premium minus intrinsic value. Payment for everything that might still happen before expiry: more moves, more news, more days for the trade to work.
• In the money (ITM) / at the money (ATM) / out of the money (OTM): ITM strikes have intrinsic value (24,800 CE here); ATM sits right at the spot price with the strike closest to it; OTM strikes (25,200 CE here) have none, 100% time value.
• "Cheap" is not "good value": the 25,200 CE at ₹55 looks like a bargain next to ₹295. It is entirely a bet on a big move happening fast, with nothing backing it if that move doesn't come.

Visual explanation

The chart below takes the same three strikes from our example (24,800, 25,000, and 25,200) and stacks each premium as two blocks: intrinsic value at the bottom, time value on top. Watch how the ATM strike's time-value block is the tallest of the three, even though its total premium is far below the ITM strike's.

The leverage hiding inside ₹7,800

There is one more thing buried in that ₹120 quote, and it is the single most important number in this course.

One lot of the 25,000 CE controls 65 units of an index trading at 25,000. That is ₹16,25,000 of notional value — sixteen lakh of NIFTY — reached with ₹7,800. Not borrowed, not on margin: that is simply what an option contract is. This is leverage, and it is why a market that moves 1% can move your money 130%.

Here is our same option one day later, at five different NIFTY levels:

Those prices are this course's canonical 25,000 CE, priced one day on. Put your own strike, days and IV into the Tools page and the exact percentages will shift; the shape of the table never does.

Read the middle row first. NIFTY did nothing and you are down 8%, because a day of time value left the option. Now read outward in both directions, and notice they are not mirror images: the gains are bigger than the losses at the same distance. That asymmetry is real and it is exactly what you paid the time value for.

But read the left half again, slowly. A 1% move against you costs 78% of the position. A day like that is an ordinary Tuesday for NIFTY. Nothing dramatic happened, no crash, no news — and three-quarters of the money is gone.

This is why beginners over-size, and the mistake is understandable. ₹7,800 feels like a small bet: it is a phone bill, a night out. It behaves like eight lakh of index exposure. The rupee number and the risk number have nothing to do with each other, and the brain quietly sizes off the wrong one.

Sellers meet the same multiplier from the other end. Their loss grows the same way, but it is not capped at what they put in — and because it is marked against their margin every day, they can be forced out of the position long before expiry decides anything. Lesson 12 is that mechanism in full.

How traders use it

Reading a premium as intrinsic + time changes how you pick strikes and how you judge a trade:

• Buyers weighing ITM vs OTM. An ITM call (24,800 CE, ₹295) moves more predictably because most of its price is already "real." An OTM call (25,200 CE, ₹55) is cheaper to buy but needs a genuinely large move just to become worth anything: it's a lottery ticket dressed as a bargain.
• Sellers eyeing time value. Every rupee of time value in an option you sold is a rupee that decays toward you as expiry nears, if the market cooperates. Lesson 6 goes deep on that decay.
• Spotting a mispriced "deal." New traders often chase the cheapest strike on the board without asking why it's cheap. Now you know: distance from spot and time value, not some hidden discount.
• Sanity-checking any quote. Before entering a trade, do the two-second mental split: "how much of this ₹ is intrinsic, how much is hope?" It tells you far more than the premium number alone.

Common mistakes

• Forgetting the lot multiplier. Reading "₹120" as the trade cost instead of ₹7,800. This single error breaks position-sizing for beginners more than any other.
• Treating a low premium as automatically low risk. A ₹55 OTM option can still lose 100% of its value, same as a ₹295 one. The rupee amount is smaller, the percentage risk is not.
• Buying deep OTM options "because they're cheap." Cheap because they're almost pure time value with little chance of turning intrinsic. Cheap ≠ good value, as this lesson's callout said.
• Ignoring intrinsic value when comparing strikes. Two options with the same premium can have very different intrinsic/time splits, and very different behaviour as expiry nears.
• Sizing off the premium instead of the exposure. "It's only ₹7,800" is how a beginner ends up with four lots and ₹65 lakh of NIFTY riding on a Tuesday. Size against what the position can lose, which Lesson 30 turns into an actual rule.
• Forgetting the small stuff. Brokerage, STT and other charges are minor per trade but real: they quietly reduce every profit and deepen every loss. They are also fully deductible, because F&O is business income — Lesson 29 explains why that matters more than it sounds.

Quiz

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