Stock options exercise calculator
For NSOs and ISOs at US companies. Calculate the cash you need to exercise (strike payment) plus the Indian perquisite tax on the spread between FMV and strike. Both apply at exercise time.
Your option grant
Indian tax assumptions
Note: ISO/NSO distinction doesn't change Indian tax — both are taxed the same here. The cash you need at exercise is strike payment + Indian perquisite tax. If you can't cashless-exercise (private company, no liquid market), you need this in actual cash.
Total cash needed to exercise
₹6,56,645
On 1,000 options
FMV value at exercise$20,000 = ₹16,80,000
Strike payment (in cash)$1,000 = ₹84,000
Spread (taxable as perquisite)₹15,96,000
Indian tax @ 35.9%+ ₹5,72,645
Total cash burn₹6,56,645
Value of shares retained₹16,80,000
Net wealth shift₹10,23,355