1 The additional fee will make the total cost to range from $140 to $300. 2  After euthanasia, the burial of the cat will cost more. 3  This will either lead you to cremation or a cemetery burial. 4  This is an optional choice for pet owners. The additional fee will make the total cost to range from $140 to $300. 2  After euthanasia, the burial of the cat will cost more. 3  This will either lead you to cremation or a cemetery burial. 4  This is an optional choice for pet owners.