Jason Isaacs has played major roles across film and television, from Lucius Malfoy in the “Harry Potter” movie series to troubled patriarch Timothy Ratliff in season three of “The White Lotus.”

Despite his industry success, the 62-year-old actor’s financial situation looks a bit different than most might imagine.

“People will think I have huge stockpiles of money,” Isaacs said in a recent interview with Vulture. “But sadly, what I’ve done rather immaturely is expand my outgoings to match my incomings and pretty much spent everything I’ve earned over the years.”

Financial experts have a term for this phenomenon: lifestyle creep.

“Many feel as though they have to spend more as they progress through career milestones,” says Matt Saneholtz, a certified financial planner in Plantation, Florida. Isaacs’ habits go “against the grain of everything” he teaches, he says.