Chaka Fattah Jr. surrendered to federal authorities Tuesday morning. The investigation had been underway since at least 2012.
Fattah's father, a Democrat who has represented a Philadelphia district in Congress since 1995, was not mentioned in the indictment. Fattah was charged with using a network of companies to obtain fraudulent loans totaling more than $200,000 and with income tax violations.
"This entire investigation has been politically motivated, and I'm looking forward to my day in court," Fattah told WPVI-TV on his way into the courthouse.
The congressman released a statement of support.
"I am confident the facts will clear his name," he said. "I have full confidence in my son; I love him and stand by him today and every day."