Freelance rates guide
As Andrew explains:
Many freelances fail to adequately appreciate when pricing their work that they are responsible for a range of costs which, were they working as an employee, would be covered by their employer. These include office equipment costs, premises costs, sick pay, pensions, holiday pay, insurance and various other costs. When pricing their services, it is useful for freelances to take into account what the comparable cost would be for employers if they used their own employees instead.
To download the Ready Reckoner as a handy PDF (56kb), click here.