Both "make a lot of money, and money is not a problem with them," a source tells PEOPLE.
"They keep their accounts basically separate," the source added, explaining that West will "talk about 'my money' and 'her money.' "
That being said, just how much does each half of this A-list duo make?
As the rapper continues to make headlines for his Twitter rants – most recently publicly asking Facebook founder Mark Zuckerberg for $1 billion after announcing he has $53 million in "personal debt" – here's what the Wests are earning, according to the latest Forbes estimates.
KIMIn 2015, Forbes ranked Kardashian West No. 33 on the list of top 100 highest paid celebrities that year.
According to the business magazine, the 35-year-old reality star "has monetized fame better than any other," making more in 2015 than any previous year – in fact, her earnings nearly doubled from the year before, jumping from $28 million in 2014 to nearly $53 million in 2015.
Forbes reports Kardashian West "owes nearly half her paycheck" to Kim Kardashian: Hollywood, her mobile and tablet game, which was released in June 2014. (Just a month after its launch, Bloomberg reported the app was already on track to reach $200 million in annual revenue.)
KANYEWest, meanwhile, did not make Forbes' list of 100 highest paid celebrities in 2015, which means he was estimated to have made less than $28.5 million (the amount earned by the celebrities that ranked 95-100 on the list).
Comparatively, the rapper was ranked No. 20 on the list in 2014, as well No. 6 on Forbes' list of Hip Hop Cash Kings 2014.
According to the business magazine, West was estimated to have earned $30 million that year, largely due to his Yeezus tour, which "added double-digit millions to his bottom line."