In order for your girlfriend to pay tax on her state pension it will need to be coded out by the tax office. Her tax free allowances for 2006/2007 are �5035. They will take off her pension which is (�110 x 52 wks) which comes to �5720. This will give her negative allowances and in order to collect the correct amount of tax due on her state pension and her earnings the tax office will probably put her on a "k" code which will collect tax at a slightly higher rate. They will send an explanation of this to her.