Yes..Transitional provisions allow taxpayers to carry forward the balance tax credit from the current regime (Excise, Service Tax, VAT.,etc. ) to GST regime, subject to the prescribed conditions.
All the unutilized input tax credit can be utilized under GST if:
-All those credits are allowed under existing laws and under GST laws
-Used for taxable supplies under GST
-Persons eligible for input tax credit under this Act
-Possession of invoices / documents evidencing payment of duty on such inputs
-Invoices/ documents were issues not earlier than the prescribed period
To know all the conditions and in details -Pls refer Chapter-XXVII- Transitional Provisions under revised GST Laws