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Deadlines for submission of model 156

Informative Tax Return. Affiliate and mutual company member payments for the purposes of deduction for maternity. Annual summary.

ANNUAL filing

Deadlines: In general, from January 1 to February 2, 2026.

Exceptions: The bodies or entities managing Social Security, excluding those managing the special Social Security schemes for civil servants of the State, the Armed Forces and personnel serving the Administration of Justice, shall submit:

  • Information on instalments and monthly contributions accrued for the months of January to October: From January 1 to March 2, 2026.

  • Information on instalments and contributions accrued in the months of November and December: until April 1, 2026.

In cases where, for technical reasons, it is not possible to file online during the regulatory filing period, filing can be done within the four calendar days following the end of said period.