Under Spanish law, prison sentences under two years can be served on probation.
Messi and his father were found guilty of three counts of tax fraud by a court in Barcelona on Wednesday.
In June, a court heard that the pair defrauded the Spanish tax authorities of around €4 million (£3.4 million) over three years. Tax havens in Uruguay and Belize were used to shield money made off the back of Messi’s image.
The court ordered the footballer to repay €1.4 million (£1.7 million), and his father €1.2 million (£1.27 million), after concluding that while Jorge Messi was primarily responsible, his son knew enough about his finances to also be held accountable.