A P60 summarises your total pay, income tax and National Insurance for the tax year just ended, from each job you were in on 5 April. Employers must issue it by 31 May. It is the document that proves what you earned and paid: you need it for refund claims, mortgage applications, tax credits and Self Assessment.
Check it when it arrives: the employer PAYE reference on it is required for expense claims like the P87, and if the tax deducted looks wrong against our Income Tax Calculator, that is your prompt to review your tax code before the discrepancy compounds for another year.
Your P60 shows £28,000 of pay and £3,500 of tax deducted. The correct figure for a full year on the standard allowance is £3,086, so £414 was overpaid, most likely from an emergency code early in the year. Without checking the P60 you would never know; with it, a refund claim takes minutes. Keep at least four years of P60s for exactly this reason.
