Originally Posted by
Duca
Why there’s tax deduction in Portugual? And social security will be paid from the residual amount or based on the total amount (pre taxed amount)?
Because that is the way it works: we get our money from Portugal and as non-residents a flat tax of 25% is applied. In some EU-countries you'll have to pay the difference between your national income tax, in some countries you do not.
Social security is based on the total gross salary, of course. In my country of residence there is a cap on how much we have to pay for social security - I guess this is true in many other countries as well.