In a scenario where one of your Stock Option position expire OTM and the other ITM, the option which expires OTM will expire worthless, while you will have to give/take delivery of underlying shares for the option expiring ITM.
The brokerage for physical settlement is 0.25% of the contract value. Along with this STT of 0.1% will be applicable, this too on the contract value. You can learn more about physical settlement in detail here:
If you’re trading in Index Options, then the option expiring OTM will expire worthless. While the option expiring ITM will be settled by the exchange at the intrinsic value. There are no additional charges for letting your position expire ITM.
Index options are cash-settled, you don’t have to give or take delivery of shares. You can check out more details here: