Lucius was still wearing the cold smile. “One hundred thousand Galleons. If you have not that much in your vault, I suppose I must accept a promissory note for the remainder.”
[...]
“I think there’s about forty thousand in my Gringotts vault,” Harry said. [...] “As for the other sixty thousand—what are the rules, exactly?”
“It comes due when you graduate Hogwarts,” the old wizard said from high above. “But Lord Malfoy has certain rights over you before then, I fear.”
Emphasis mine. I think (most of) whatever he has must be payed immediately, and the “due” part is only for the rest.
Emphasis mine. I think (most of) whatever he has must be payed immediately, and the “due” part is only for the rest.