Since the pronunciation is the same as another 'Karyo' which means a petty fine, Karyo which means a non-penal fine is often called 'ayamachi-ryo' and the another one 'toga-ryo' to distinguish the two fines.
特に刑罰である科料と同じく「かりょう」と発音するので、過料を「あやまちりょう」、科料を「とがりょう」と呼んで区別することがある。