I've accepted a part time (well, 4 day a week) job nearer to home, for slightly higher annual salary (if I was fulltime, clearly I'll only be paid 80% of that), but most importantly, the costs associated with work will reduce drastically (petrol, wear and tear on the car, and childcare, as well as gains stress/sleep wise!). I'm very very happy about this. Onto my dilemma.
At work, I'm in a role which only 2 other staff members do, and I'm the only fulltimer - one other is a contractor who is hired on a regular basis depending on order volume (generally in blocks of a few weeks), the other is a woman who's part time on 3 days a week who doesn't want to work fulltime. On Friday, my manager suggested working for them on a freelance basis, depending on work's order volume, as and when they need me and I'd like to.
Pros:
The work is easy.
They need me more than I need them - I can dictate when I take on work.
I wouldn't mind some extra cash.
I know the work would be reliable (recession proof industry).
There are no set up costs associated with the work I'd be given (I'd only be given the work that can be done from home).
Cons:
Potential issue with IR35 status?
Finally, I have no idea what to charge.
It's that last one I was hoping to get some MN advice on.
My employer is badly paying at the best of times, and I know that if I agree to this they'll expect my rate to be something crap. I don't think we'll need the extra cash, and since I'll basically be doing them a favour, I'm not really interested in charging £10/hr for something that the contractor is being paid at £400/day for (yes, really!).
Is there a formula which is a good suggestion for what an hourly rate would be for this sort of thing? I.e. if I was being paid £16/hr at my employer, freelancing on an hourly basis... would it be fair to double the hourly rate? What would others suggest here?