Originally Posted by
redsnail
Some one on the Continent will be along soon to advise. However, I believe the tax rate for those paying tax to Portugal but who are not resident pay circa 20%. I stand to be corrected by those more knowledgeable. (I'm UK resident and pay in the UK).
The Portuguese non-resident tax is 25% on our basic pay, tour based pay, productivity pay, extended day pay etc.. In some countries you may have to pay an additional national tax, but e.g. in Germany this is not the case so far.
Social security is always paid in the country of your permanent gateway airport.