The prosecutor's office in the Spanish capital is alleging the Portugal international used a business structure created in 2010 to hide his image rights income from the Spanish authorities. He is accused of evading tax of €14.7m (£13m, $16m) from 2011 to 2014. The Champions League and La Liga winners say they have "full confidence" in their player, insisting Ronaldo had "always shown a clear will to fulfill all his tax obligations."
A source has now told IBTimes UK that Ronaldo is "outraged" with these allegations. The Ballon d'Or winner feels he was unfairly and disproportionately singled out as an example, despite having voluntarily paid his taxes. This situation has left him determined to leave Spain.
Ronaldo joined the 12-time European champions from Manchester United in 2009. He helped Real retain their Champions League title in June with a 4-1 victory over reigning Serie A champions Juventus in Cardiff.
It remains to be seen whether Real will sanction Ronaldo's sale during the forthcoming summer transfer window. The forward scored 41 goals across all competitions for Zinedine Zidane's side last term as they celebrated the double. The Portuguese captain's form will inevitably see him attract interest from former employers Manchester United as well as French giants Paris Saint-Germain.
In November 2016, Ronaldo put pen to paper on a new five-year contract believed to be worth in the region of £365,000-a-week.
"What Cristiano has to do is finish his career here," Zidane said at that time. "He is unique because of what he does and what he stands for. His dream is to end his career here and I am happy that he can renew his contract and end his career here just I did a long time ago".
Real Madrid are due to hold a presidential election this summer, with 18 June the last date for filing nominations.