Jay-Z is a rap mogul worth around $500 million — but his clothing brand Rocawear is in the red, a lawsuit claims.

The apparel group allegedly owes $450,000 to wholesale company iSource NYC for urban-style duds made in Pakistan and shipped to New York last April through June, the Manhattan Supreme Court filing states.

The clothing items “were specially ordered goods . . . [with] the ‘Rocawear’ brand name imprinted on [them],” the Garment District company claims in the suit.

“Defendant never returned the ROC goods to iSource.”

Rocawear paid for about half of the $1 million order, but has yet to cough up the balance, the suit alleges, and iSource wants the rest of the money plus 9 percent interest — because the bill was due last summer.

Reps for Rocawear did not immediately return messages for comment.