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Special agreements for part-time workers


Procedure for applying for the Special Agreement for Workers hired on a part-time basis

General Information


To complete the contributions arising from part-time contracts up to the minimum contribution basis in effect in the special Scheme for self-employed workers, or up to the basis the worker might choose as a result of his/her previous contributions if the latter are greater. The covered contingencies are: retirement, permanent disability, Death and Survival, arising from common contingencies.


Workers hired part-time who are not receiving unemployment benefits.

More information on beneficiaries


Form TA-0040

  • Original and copy of the: National Identity Document, Foreign Citizen Card or Passport, as applicable.
  • Company certificate indicating the contribution basis for common contingencies.
Where to process it:

At the Provincial or Administrative Offices of the Social Security Treasury General corresponding to the domicile of the applicant. If you have a digital certificate you can access the e-Office and submit the application form and required documentation online using the Special Agreement Registration process.


There are two deadlines:

  • At any time during the term of the part-time contract.
  • 90 days following the termination or situation determining the special agreement.

The agreement is effective:

  • From the date of application.
  • From the date of the situation determining the special agreement (this date may only be chosen if the application is filed within 90 days following said date)

It will not be necessary to accredit a contribution period prior to the Agreement application.

Denial / Expiration / Suspension:

It will terminate due to the end of the contract, in which case the Special Agreement envisaged in the General Regulation can be signed.

Other important information:
  • The monthly contribution basis is made up of the difference between the contribution basis for the part-time contract and that chosen by the interested party, up to the contribution basis that is the result of dividing by twelve the total of the bases for common contingencies for which contributions have been paid by the worker who is applying for a special agreement, for the twelve consecutive months prior to the month in which the agreement took effect.

 More information on contributions

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