How the calculator works it out
Under article 107 each overtime hour is paid the actual hourly wage plus 50% of the basic hourly wage. The calculator divides the monthly wage by 240 hours (30 days × 8 hours, article 98).
Example: basic SAR 4,000, actual SAR 5,400, 6 overtime hours: actual hourly 5,400 ÷ 240 = 22.5, half the basic hourly 4,000 ÷ 240 ÷ 2 = 8.33, so each overtime hour is SAR 30.83 and the total SAR 185.
What it does not cover: reduced Ramadan hours, or a contract with fewer than eight daily hours. Both change the monthly hours the wage is divided by.