10 years. The important ones are usually permanent, and the average business lasts about 15-20 years. 10 years. The Accounting Archives Management Measures revised in 2016 stipulate that the period of regular storage is 10 and 30 years. Bank statements and balance reconciliations are both 10 years old.

1. The retention period of accounting files is divided into two categories: permanent and periodic. The retention period of accounting files is calculated from the first day after the end of the accounting year. Permanent means that accounting files must be kept permanently; periodic means that accounting files should be kept for a statutory period of time. Regular storage periods are generally divided into 10 years and 30 years. The storage period of accounting files is divided into two categories: permanent and periodic. Regular storage periods are divided into five categories: 3 years, 5 years, 10 years, 15 years, and 25 years. The retention period of accounting files shall be calculated from the first day after the end of the accounting year. Generally, the loan archives of large and medium-sized construction projects and technical transformation projects above the quota are kept for 10 to 20 years; the archives of small construction projects, technical transformation projects below the quota and working capital loan projects are kept for 1 to 5 years.

2. According to the "Measures for the Management of Loan Files of the People's Construction Bank of China": Article 7 According to the different preservation and utilization values ??of each loan project, the storage period of RMB loan files is divided into three types. The loan archives of all national key construction projects and construction projects with historical value will be kept permanently. The storage period of foreign exchange loan files shall be based on the upper limit of the corresponding storage period of RMB loan files. Article 8 The storage period of loan files shall be calculated from the second year after the principal and interest of the loan are fully repaid.

3. Article 9 The credit business departments of banks at all levels should designate personnel to be responsible for the collection, sorting and archiving of loan archives. Article 10 Loan files shall be filed once a year. The archives of fixed asset loan projects are generally filed in two phases, that is, the first phase is archived after the project is completed, and then supplementary archives are filed after the loan principal and interest are recovered on schedule; the archives of working capital loan projects are archived all at once after the loan principal and interest are recovered on schedule. ; Archive materials for overdue loans can be transferred and filed one year later than the normal filing time. Article 11 The loan file management personnel designated by the credit business department shall collect all loan file materials that should be filed in the previous year before the end of March each year, and organize and file them.