"Personal allowance" refers to the amount of money an individual is allowed to earn or receive without paying any income tax on it. It is a certain sum set by the government which you can keep for yourself without owing tax on it. Full definition
While the commitment to raising personal allowance has been kept, that overall package has been picked apart by the coalition agreement. (socialliberal.net)
The shock fuel duty cut and increased personal allowance will make a real difference. (conservativehome.blogs.com)
OK so you loose # 1 of personal allowance for every # 1 you earn over # 100,000. (iaindale.blogspot.ru)