I have been asked back for one week at an establishment that I used to work for. In the past, whenever I worked for Establishment A, I would go through an agency, Agency B.
However, Establishment A have told me that they want me to invoice them directly without involving Agency B.
The problem I have with this is that I have never billed anyone for any freelance work in the past as I have always worked directly for an establishment, and I have no idea what I should charge.
When working for Establishment A via Agency B most recently, I was paid an hourly rate (by Agency B) of £10.86; however, Agency B were paid considerably more by Establishment A, of which I unfortunately do not know the specifics, but I would estimate that Agency B received approximately £19.00-£20.00 per hour as this is something that I saw many years ago whilst working elsewhere that also dealt with Agency B.
The questions I have are as follows:
1. How should I charge Establishment A? Hourly or a one-off fee?
2. How much should I charge Establishment A? Do I charge them somewhere in the middle ~£15.00ph/£600 one-off (5 days at 8 hours per day) or should I aim lower / closer to the top-end like Agency B were being paid for me? The problem with this is that I don't want to take the proverbial and cause offence as I know the people at Establishment A very well. However, being self-employed, I now have overheads which I will have to account for, such as tax calculations and travel.
Any help would be wonderful as I am unsure what the best practice would be here as both appear to have an equal balance of pros and cons.