The August 25, 2016 amendment to the January 14, 1971 tax treaty between France and the Portugal, published in the Official Journal on January 6, 2018, went into effect on December 1, 2017.

The agreement stipulates that French citizens residing in Portugal who receive public remuneration. In particular, staff of the Agence pour l'enseignement français à l'étranger based in Lisbon and Porto. For tax periods beginning on or after January 1, 2013. Only taxable in France, and will no longer be required to pay tax in both countries before submitting a request for the elimination of double taxation.

Its main provision, concerning the taxation of public remuneration and pensions. Applies to tax periods beginning on or after January 1, 2013. Bringing Article 27 governing information exchange into line. Applies to any calendar year or accounting period starting on or after January 1, 2018.

The other provisions (introducing an article 27 bis relating to recovery assistance and an article 31 bis containing two anti-abuse clauses) apply on the French side:

- With respect to income taxes collected through withholding. To amounts taxable after 2017;

- with respect to income taxes not collected through withholding, income relating to As the case may be, to any calendar year or fiscal year beginning after 2017;

- in respect of other taxes. To taxes whose generating event occurs after 2017.