Since December 12, 2025, the services “Computation Bases Communication”, “Display Calculation Bases”, “Calculation Basis Request” pat and “View Calculation Elements” pan are available (INAIL, note December 10, 2025, n. 10899). These online services are accessible on the institutional website of INAIL.
Specifically, the institute informs that the online service related to the Communication of Calculation Bases for 2025/2026 self-assessment is available on its site in the section “Company File – View Communications”. Employers and other insuring subjects required for self-assessment, as well as intermediaries for company codes in delegation, can access this service.
In the presence of multiple calculation bases (in case of variation and “re-training” of the same by the branches), communications are listed by processing date in descending order, such that the most recent is positioned at the top of the list.
Regarding the online service “Request Calculation Bases”, this year it is possible to acquire the calculation base file in .pdf format as well as in .json version.
