The amount called in respect of a share but not paid before or on the date fixed for payment is referred to as:

Answer Details

The term you're referring to is "Call in arrears." When a company issues shares, it may require shareholders to pay additional amounts (known as "calls") in order to increase their capital. These calls are typically due on a specified date. If a shareholder does not pay the required amount by the due date, the outstanding amount is referred to as a "call in arrears." This means that the shareholder has fallen behind in their payments and owes the company money.