I look after a set of bikes as part of my job. H&S tell us they must be serviced 6 monthly.
I put 12-15 bikes through servicing at £25 per bike + vat. Any minor repairs, brake pads, chains, cassettes, bearings, pedals, cables, innertubes, tyre etc are charged at the trade cost of the part no further labour is charged for fitting.
The only thing they charged labour for was a wheelbuild when a hub needed replacing. The servicing usually involves checking all safety critical bits, and torque/tightness of crank, pedals, bearings, measuring brake pads and rotors cleaning and lubing of cables (but not chain set). Sadly we usually find that replacing things like Hubs (Shimano 475 ) is cheaper than servicing.
They usually collect and return our bikes at no extra charge.
Added to that, if I end up dead due to a bike defect, they are the ones in the coroners court.
Our organisation has looked at putting our own staff through the Cytech course, but decided the cost outweighs the benefit of outsourcing the risk nevermind the cost of the course/maintaining competencies.
Not sure it pays.