Considering Paris Hilton is worth an estimated $300 million to $400 million, it might seem odd that she reportedly took out a mortgage on her recent home purchase. 

Hilton, whose vast wealth comes from 19 product lines, real estate, media and entertainment, brand partnerships, and her reality show, The Simple Life, bought actor Mark Wahlberg’s former estate in Beverly Hills earlier this year for a whopping $63 million. 

But what wasn’t reported at the time was that Hilton and her entrepreneur husband, Carter Reum, reportedly took out a mortgage on the home, which might seem like an unusual move for the 44-year-old hotel heiress. And what’s seemingly even more strange is they reportedly took out the loan after they had already bought the 12-bed, 20-bath home, which shows a $43.75 million mortgage with JPMorgan Chase at an interest rate of 5.25%.

But this type of arrangement isn’t as rare as it may seem, real-estate experts say. 

“It surprises many people, but it’s actually quite common for the mega-wealthy to take out mortgages—even when they could write a check for the full purchase price,” Evan Harlow, real estate agent at Maui Elite Property, told Fortune. 

In fact, public records show ultrawealthy celebrities including Beyoncé, Jay-Z, Elon Musk, and even Mark Zuckerberg have financed their homes. 

“The takeaway for the average buyer isn’t to mimic their precise approach, but to understand the principle,” Harlow said. “Sometimes the smartest financial move isn’t paying everything off, but keeping your money flexible and working for you.”

Why the ultrawealthy take out mortgages

While it may seem counterintuitive to take out a mortgage in today’s market, where rates are still hovering in the 6% range, it can actually be a savvy move for ultrahigh-net-worth individuals.