For a Cessna 150
Radio annual around £120.
Radio Licence 3 yearly about £70?
CAA fee paid by me at ARC time around £56.
I pay for the ARC as as a stand alone charge.
I have all maintenance including the radio annual done by independent licensed engineers.
After that it is fuel,insurance and hangarage.
Currently the other recurring charges are prop overhaul, vac pump replacement, seat belt replacements, fuel and oil hose replacement, magneto maintenance and compass swing.
I think that covers most of it.