The calendar was approved at the World Council meeting of the International Automobile Federation, which took place during their annual general assembly in Saint Petersburg, Russia.
The Portuguese race will be the seventh of 14 rounds of next year's World Rally Championship, which will have one more competition than in recent years. The Chile Rally is to be held from 9 to 12 May.
In all, Portugal has 10 competitions already confirmed in which it is possible to score for international events.