His father, Jorge Messi, was also given a jail term for defrauding Spain of €4.1m (£3.5m; $4.5m) between 2007 and 2009.
They also face millions of euros in fines for using tax havens in Belize and Uruguay to conceal earnings from image rights.
However, neither man is expected to serve time in jail.
Under the Spanish system, prison terms of under two years can be served under probation.
The footballer and his father were found guilty of three counts of tax fraud in Wednesday’s ruling by the court in Barcelona.
As well as the jail terms, Messi was fined about €2m and his father €1.5m. They made a voluntary €5m “corrective payment”, equal to the alleged unpaid tax plus interest, in August 2013.
The sentence can be appealed against via the Spanish supreme court.
- Winner of Fifa Ballon d’Or as world’s best footballer on five occasions
- Voted Uefa best player in Europe three times
- Uefa Champions League winner with FC Barcelona on four occasions
- Spanish championship winner with FC Barcelona eight times
- Olympic gold medallist with Argentina in 2008
- Argentina’s all-time leading scorer with 55 goals
- June 16 2016: quits Argentine team after missing penalty in shootout in Copa America final loss to Chile
- it was fourth major final defeat for Argentina in nine years
- other three losses: Copa America (2015) again to Chile (again on penalties); 2014 World Cup to Germany; Copa America (2007) against Brazil
FC Barcelona’s reaction
“FC Barcelona expresses its full support to Leo Messi and his father in relation to the conviction for tax fraud…
“The club… considers that the player, who has corrected his position with the Spanish tax office, is in no way criminally responsible with regards to the facts underlined in this case.”
Messi tax fraud trial: ‘I knew nothing’ Barcelona star says
The Barcelona and Argentina football star, Lionel Messi, who is on trial for alleged tax fraud in Spain, has told a court he had no involvement in the management of his financial affairs.
“I was playing football, I knew nothing,” he said.
Messi and his father Jorge, who manages his finances, are accused of defrauding Spain of €4.1m (£3.2m; $4.6m).
The authorities allege that the two used tax havens in Belize and Uruguay to conceal earnings from image rights.
Wearing a dark suit and tie, Messi sat alongside his father in front of the judge and listened to other testimony for nearly four hours before being called to testify in the third day of the trial.
Messi, 28, said he signed documents without reading them because he trusted his father and the advisers responsible for managing his finances.
“I only worried about playing football,” he told the judge.
Speaking for less than 15 minutes, he said he never suspected any wrongdoing when his father would ask him to sign contracts or documents. Jorge Messi also denies the charges.
Spain’s tax agency is demanding heavy fines and prison sentences.
The trial began on Tuesday, and Thursday is expected to be the final day. A verdict is not expected until next week.
Because of the trial, Messi has missed part of his national team’s preparations for the Copa America, which starts on Friday in the US. Argentina’s first game is on Monday.
Evidence is being considered regarding income related to Messi’s image rights, including contracts with Banco Sabadell, Danone, Adidas, Pepsi-Cola, Procter and Gamble, and the Kuwait Food Company.
- Messi’s lawyers had argued that the player had “never devoted a minute of his life to reading, studying or analysing” the contracts.But the high court in Barcelona ruled in June 2015 that the football star should not be granted immunity for not knowing what was happening with his finances, which were being managed in part by his father.
Messi and his father made a voluntary €5m “corrective payment”, equal to the alleged unpaid tax plus interest, in August 2013.
The footballer is the five-time World Player of the Year and one of the richest athletes in the world.
- Source BBC SPORT