How many million tomans are the arrears of social security pensioners? The calculation formula and time for depositing arrears of Ardibasht The formula for calculating arrears of social security pensioners was established in 1405. According to the announcement of the National Insurance Institute, the arrears related to the difference in the annual salary increase and the third phase of proportionality will be paid this week. But the amount of arrears is not the same for all pensioners. Then, read the formula for calculating the arrears, the numerical example and the table of factors affecting the amount the pensioners received.