No. Transferring Bitcoins from your Indodax account to another Indodax account will not cost you anything. You will only have to pay 0.0005 BTC if you are transferring Bitcoin to another wallet that is not directly related to any Indodax.com. For example, when you’re sending Bitcoin from VIP to Blockchain.info, Airbitz, Coinbase, etc.
*Transfer altcoin to another VIP account will cost you depends on what altcoin you transfer