Labor Pension Act Article 21

The amount of contributions made by the employer shall be notified to employee(s) via a printed monthly notice.The employer shall have on file an employee roster that includes information on the dates when employment commenced, dates of resignation, attendance records, wages, monthly contribution records and other related information; such information shall be preserved for five years after the date an employee resigns.For workers choosing to be covered by the pension system in accordance with this Act, the preservation of their related documents shall be handled according to the provisions referred to in the preceding paragraph.
中文原文 勞工退休金條例第21條
雇主提繳之金額,應每月以書面通知勞工。
雇主應置備僱用勞工名冊,其內容包括勞工到職、離職、出勤工作紀錄、工資、每月提繳紀錄及相關資料,並保存至勞工離職之日起五年止。
勞工依本條例規定選擇適用退休金制度相關文件之保存期限,依前項規定辦理。

English translation for reference only; the Chinese text prevails. Not legal advice.