Overview

• MoneySavingExpert says millions of tax codes are wrong each year, which can leave people either overpaying or facing a future bill.
• An MSE reader who corrected her code reported a £9,400 rebate after being taxed without the personal allowance.
• Tax codes are shown on payslips, P45s, P60s and pension slips, and they can be checked through HMRC’s website or app.
• Those with multiple jobs or private pensions receive a separate code for each income source, so all codes should be reviewed.
• Birmingham Live reports some refunds run into the thousands, with average payouts said to be about £2,000, and a refund firm says clients have reclaimed large sums after job changes or time off led to wrong codes.