Adam Giersz told Reuters in an interview that Poland, which is to co-host the tournament with Ukraine, expects 900 million zlotys from additional tourist traffic in 2012 and a further 5 billion zlotys in the years following.
"We expect around one million tourists to come to Poland specifically for the Euro 2012, of which around half would have tickets for games," Giersz said.
"In the following years, we also expect some half a million more tourists coming to Poland than usual and, as a result, extra revenue of some 5 billion zlotys by 2020."
Giersz estimated the overall boost to the economy would reach some 2.1 percent of Poland's GDP in 2009.
Key infrastructure investments, mainly stadiums, are progressing on schedule and so the focus of Poland's preparations is shifting to organisation ahead of the world's third largest sport event, he said.
"For now, it's mostly the problem of ensuring safety at stadiums. We are still facing issues such as transport logistics for football fans," Giersz added.
In his office, a large-scale map of Poland bears blue spots to mark the 1,285 sports grounds opened across the country to promote sport among youth, one of Tusk's flagship projects.
"There will be 1,850 of these by year-end," Giersz said, adding that Warsaw believed the state's role in improving both the sorry state of Polish soccer as well as other sports should focus on providing infrastructure and a clear legal framework.
Mindful of the national team's run of embarrassing defeats, including losing recently 6-0 against Spain and 3-0 to Cameroon last week, Giersz added: "The state of Poland's football is the biggest threat to the success of Euro 2012."
But he tried to brush aside Poles' widespread fears that their team will be forced out of the tournament early on.
"I am an optimist - it cannot get any worse. We have hit rock bottom and things can only get better," he said.
