I'm just about to start a new job that requires me to administer my own PAYE once per year via tax return. Thankfully it's a regular monthly salary so should be easy for me to set the money aside each month and not end up doing a Kerry Katona and going bankrupt but the concept is still unsettling me. Does anyone in this situation have any other advice, and is there anything better for this purpose than a savings account/ISA to stick my monthly 'tax' allocation into?