Take in mind also that you need to advance the VAT to the government each three months. Including money that could be still unpaid to you (or worse, that will never be paid because some big clients can blackmail small companies easily in that sense). This is a problem for a small company that is thus forced to eat the loses and lend a money to the government, even if they do not really have this money. Is bassically sucking money from the people that create and maintain jobs.