Apologies if this has been asked before. I joined a supply agency today and when I was contacted by the payroll agency they told me they chage a £10 'Umbrella Margin' for each day. Unless I've misunderstood this means I am paying £10 a day to get paid which seems ridiculous. Is this how it works these days? It's been over 12 years since I last did supply and back then I got paid directly by the agency.