Cash margin shortfall interest on expiring contract

[Adarsh_Patil]

@Nandha207

If I sell an option (or hold a short position) that expires today and I let it go to settlement :

No interest will be charged, as the contract expires on the same day.

Also read this

Change in brokerage for intraday use of collateral

Yep, the charge is not linked to % of shortfall.