Atletico Madrid remain one of the La Liga sides with the highest tax debts, although reports say the club have cut the money owed from over €200 million just a few years ago to a current figure of €45m.
La Liga have announced their official financial figures, with clubs now owing €230m to the exchequer, which they say is a significant achievement considering the total debt owed in January 2013 was €650m.
AS reports that within this two-and-a half-year period Atletico were a prime contributor to the improvement in the situation, with the club paying off €155m of the money owed and now aiming to repay the remainder by 2018.
Speaking at the announcement of the latest results, La Liga's corporate director general Javier Gomez said that after a big effort made in recent years, just six clubs now owed 70 percent of the money due to the tax authorities.
"[These six clubs are] Atleti, Espanyol, [Real] Valladolid, Elche, Mallorca and [Real] Zaragoza," Gomez said. "[Real] Madrid and Barcelona have no debt with the tax authorities.
"This is an example of the cleaning up of Spanish football. The [progress] has been enormous. The objective is to have the best situation in Europe by June 2019."
While Atletico do not make their club accounts public, AS claims they currently owe €115m to unnamed third-party investor funds.
Atletico have admitted to receiving funding in the past from investors including Doyen Group and Quality Sports International.