Overtime on this page is extra pay. It is not a new monthly salary, and it is not folded back into EPF. The ordinary rate of pay for a monthly employee, section 60I of the Employment Act 1955, is the monthly wage divided by 26. The hourly rate is that day divided by the normal hours of work. A wage of RM2,600 and an 8-hour day is RM100 a day and RM12.50 an hour. Two weekday overtime hours, at not less than one and a half times that hour, are 2 × 1.5 × 12.50 = RM37.50.
The load button also marks a rest day worked for more than half the normal hours, up to a normal day. For a monthly employee that band pays one day, RM100. Half the normal hours or less would be half a day, RM50. Hours past the normal day on a rest day are at least two times the hourly rate, and the form has a separate box for those hours so they are not quietly priced at 1.5. The loaded example has no public holiday and no extra rest-day hours, so the extra pay is RM37.50 + RM100 = RM137.50, on top of the RM2,600. Clear the rest day if the question was only the weekday RM37.50.
A public holiday worked for the normal hours pays two days' wages at the ordinary rate, in addition to the holiday pay that is already inside the monthly wage. Overtime on that holiday is at least three times the hourly rate. Tick the holiday box only when the normal hours were worked that day, and put any hours beyond them in the holiday-overtime box. Adding the two-day payment and also deleting a day from the monthly wage double-counts the holiday.
Daily-rated workers are not the same rest-day table. Under the Act, a daily-rated employee paid for half the normal hours or less on a rest day gets one day's wages, and more than half up to a normal day gets two days. This form prices the monthly bands, because that is the wage it asks for. The day and hour page is where a daily wage is turned into an hour. Sabah and Sarawak ordinances are not this Act.
These rates are a floor for employees the hours-of-work sections cover. After the 2022 amendment the First Schedule still excludes many employees earning above RM4,000 a month from those sections, with exceptions that include manual labour and other named categories. A contract can pay more than the floor. Re-check the current First Schedule before you tell someone paid above that line that the Act owes them 1.5. The extra pay is on top of the month. It is not a reason to run the whole wage back through the net salary calculator as if the overtime were a new basic salary. KWSP's own material treats overtime as outside EPF wages.