Black–Scholes option calculator
Enter the underlying price, strike, days to expiry and volatility. See the theoretical call and put prices and the Greeks.
- Call and put
- All the Greeks
- Free, no sign-up
F&O and your tax return
Futures and options trading is non-speculative business income, filed in ITR-3. Our experts handle turnover, audit limits and losses.
Questions people often ask
How is F&O income taxed?
As business income at your slab rate. Losses can be set off against other income except salary and carried forward 8 years.
Do I need a tax audit?
Only if turnover exceeds the section 44AB limits, or in certain presumptive cases.
The model's inputs
Five numbers.
- Underlying price and strike.
- Time to expiry and the interest rate.
- Volatility: the one you have to estimate.
Last reviewed 9 October 2026. The rules in this calculator come from these official sources.
- Equity derivatives: contract specifications National Stock Exchange of India
- Investor education Securities and Exchange Board of India
Common questions
What is the Black–Scholes model?
A formula for the fair value of a European option from the underlying price, strike, time to expiry, interest rate and volatility.
What is implied volatility?
The volatility that makes the model match the option's market price. The option chain usually shows it.
What do the Greeks mean?
Delta: price change per ₹1 move in the underlying. Gamma: how fast delta changes. Theta: value lost per day. Vega: change per 1% in volatility.
Why does my option trade at a different price?
The model is a theory. Market prices reflect supply, demand and expectations the model doesn't capture.
Are most F&O traders profitable?
SEBI's studies have found that most individual traders in equity F&O lose money.
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Brokerage, STT, stamp duty and other charges on a trade.
Coming soon