The nine-time world champion announced in September that he would step back to a part-time programme next year.
At the time he only confirmed that he would contest the Monte Carlo Rally, but at the launch of Citroen's 2013 programme the Frenchman revealed that he will enter three other rounds during the course of the season.
Loeb will also compete in Sweden, Argentina, and his home round in France.
"We'll start the season in Monte Carlo and we'll also be competing in Sweden, because it's a rally that I would love to win in normal racing conditions," said Loeb, who has only won in Sweden once (2004).
"And I couldn't begin to think about missing the Rallye de France."
Citroen also revealed that Dani Sordo will enter at least 11 of the 13 rounds next year.
The Spaniard, who returns to the team after two years driving for Mini, said: "I'm incredibly pleased to be back with the team.
"The first test sessions went very well and I'm ready to help Citroen win more titles. My personal goal will be to win my first rally in the WRC."