Gst applicability on indirect income

Swadhi Godha (Finance Executive) (10 Points)

29 December 2017  
Whether a service based company needs to charge gst & issue invoice for its indirect incomes say:
1. non usable office utilities sold.(scrap)
2. Interest on investments(F.D. mutual fund etc).
3. office interior for rented office which was originally booked as expense, now sold.
Please do help in getting answer for each issue.