Focus quoted Berlin court spokeswoman Katrin-Elena Schönberg as saying the court cannot seize assets from someone who makes €959.15 ($ 1,526) or less each month.
The 41-year-old suspect said he is on welfare, according to the magazine's report.
The Hitler figure is reported to have cost €200,000.
Frank L. is accused of attacking the controversial Hitler waxwork on July 5, the day the Tussauds museum opened in Berlin. Second in line when the museum opened its doors, he ran up to the wax figure seated behind a desk, wrestled with a security guard and ripped off the figure's head.
He has said he was fulfilling a bet he made a day prior to the museum's opening.
Some 62 percent of respondents in a Focus survey supported the museum's decision to repair the Hitler waxwork and return it to the display.
Support was lower among older respondents, with 44 percent of those older than 54 years old opposed to the display. Just 26 percent of those younger than age 34 opposed restoring the waxwork.
The Tussauds museum on Berlin's Unter den Linden boulevard displays 75 wax figures from German politics, sports and show business – including actress Marlene Dietrich, Chancellor Angela Merkel, Albert Einstein and Karl Marx.