An option is In-the-money (ITM) when exercising it would produce a positive payoff (ignoring premium paid). For a call: spot > strike. For a put: spot < strike. ITM options carry intrinsic value plus time value.
Plain-English example
NIFTY spot = 24,800. The 24,500 Call is ITM by 300 points — exercising gives 300 immediate value. Its premium might be ₹340 (₹300 intrinsic + ₹40 time value). The 24,500 Put, by contrast, is OTM because exercising the right to sell at 24,500 when spot is 24,800 makes no sense.
Why traders use ITM
- Higher delta (close to 1 for calls, −1 for puts) means premium moves nearly 1:1 with the underlying — acts like leveraged stock
- Less time decay per ₹ of premium
- Higher win-probability than OTM
Trade-offs
ITM premium is expensive (more capital tied up) and the leverage advantage shrinks as you go deeper ITM. Many retail traders buy deep-OTM "cheap" options and lose them to theta — ITM is often the more capital-efficient bullish/bearish play.
SEBI caveat
Even ITM options can expire worthless if a gap move occurs against you. Educational only, not a recommendation.