Loew, who took over from Juergen Klinsmann after the 2006 World Cup, has led Germany to one final and two semifinals in his three tournaments in charge.
He has yet to win an international title, however, with the success-starved Germans eager to end an 18-year title drought in Brazil.
"As it is at the moment, that is the case. For sure until 2016," Loew told Express newspaper on Tuesday when asked how long he would stay on. "This is what we have decided."
He did not rule out remaining at the helm even if Germany won the World Cup, although many believe that would be a good time to step down.
"One could see it like that," Loew said. "But it is equally possible that there is a motivation explosion when you win the World Cup. To confirm this success in the years that follow is also great."
"As world champion you could say 'it is enough I can stop'. (Spain coach) Vicente del Bosque said after winning the World Cup in 2010 'now I also want a Euro title'."
Spain went on to win the Euro 2012 following their World Cup victory in South Africa in 2010.
Germany, whose last trophy dates back to Euro 96, have been drawn in Group G along with Ghana, the United States and Portugal.