I cant believe it. I have just been told by a person at my employer's tax office that the tax allowance does not refer to pounds and pence and because I underpaid by £350 in the tax year finished March 09, My 2009-10 tax code has dropped to 468. Should I believe this ? I know I didn't get £350 extra in fact the job I've moved to (with the same employer) earns less on an hourly basis !!!