OP, that sounds like a bad deal to me.
Manchester firm, we are paid in the following way:-
Each night you're on the rota per month = £13
All fixed fees from out of hours cases are split in two, half goes to firm, other half goes into a pot. Reps put their hours in every month, and an hourly rate is worked out based on the size of the pot.
This means there's an incentive for us to be as efficient as possible to earn more fixed fees = bigger pot = higher hourly rate.
We put in our hours for travel and attendance at same rate and since the new scheme in Jan have been paid on average £35 / 40 per hour.
Last month I earnt an extra £1000 for about 25 hours ot.
