According to the statistics body, in the past 12 months up to August the average variation of the price index, excluding housing, was 1.15 percent, which serves as a basis for the ratio used for the yearly update of rents for next year under the New Regime of Urban Renting.
The hike in rent prices will affect both urban and rural areas and will be the highest seen since 2013.
Rents were frozen in Portugal in 2015, because of the negative variation of the price index, excluding housing registered in that year.
The four previous years, from 2011 to 2014, rents rose consecutively.
Under the law, rents are subject to annual updates which are applied automatically depending on inflation.