current, up-to-date, paid up, on time, not in debt

delinquent, in default, behind, in arrears, more...

large, long, such, heavy, outstanding, total, external, great, considerable, tax, huge

unpaid debt,   over-due amount,   amount past due,   overdue payment,   unpaid debts,   overdue debt,   accumulated debt,   back rent,   overdue balance,   outstanding debts