The 75-year-old journalist, who edited the Eleftherotypia newspaper for more than 30 years, was arrested on Tuesday after misdemeanor charges were filed against him.
A media company owned by Fyntanidis, who recently hosted a show on state-run NET TV, is alleged to owe 55,000 euros in VAT. As a result of penalties and interest, this amount has risen to almost 136,000 euros.
Fyntanidis was one of five people arrested on Tuesday for owing money to the state.
The 46-year-old owner of a firm making beauty products was arrested in Thessaloniki for debts of 1.1 million euros. The 50-year-old owner of a printing firm was arrested in Athens for owing 741,000 euros. Two brothers, aged 74 and 77, who co-own a clothing company, were arrested for outstanding taxes of almost 180,000 euros each.