DP charges are levied by your depository participant, usually the broker, whenever securities are debited from your demat account, which mainly happens when you sell delivery shares. The fee is per scrip per day, not per share, and is typically in the range of ₹10 to ₹25 plus GST at the time of writing; check your broker's current schedule. Some brokers also charge an annual maintenance charge for the account. If you sell 5 shares of SBI and 500 shares of SBI on the same day, the DP charge is the same. This is why very small delivery trades are inefficient: on a ₹500 sale, a ₹15 DP charge is 3% of the value. DP charges do not apply to intraday or F&O trades, since no securities move. They appear on your contract note or ledger, so review it.