Pengertian P45 adalah: Subjek Definisi Employment/Employment Law ? P45 : When you leave your job your employer gives you a P45 form. It is a certificate stating your pay, tax, USC and PRSI contributions deducted from the start of the tax year to the last day of your job. Accounting ? P45 : A form that an employer must give to an employee who’s leaving their job. Definisi ?