When I've used subs in the past I've added $10/hr to their fee.
When working as a sub I used my normal hourly fee unless it was a BIG project and it would have been lost without both myself and the primary contact taking a little off the top.
I don't believe in underpaying subs. I have everyone who might possibly sub with me send me their prices. I also have them sign a sub-contractor agreement.
My policy is we are all professionals and should be treated that way - and treat others that way. Respect is the word of the day!
Carol
CJ's Virtual Business Solutions