The overtime rate payable for non-workmen is capped at the salary level of $2,250, or an hourly rate of $11.80. For overtime work, your employer must pay you at least 1.5 times the hourly basic rate of pay.Payment must be made within 14 days after the last day of the salary period. A non-workman earns $2,400 a month and works 2 hours of overtime.vertime pay. Overtime work is all work in excess of the normal hours of work (excluding breaks). You can claim overtime if you are: 1  A non-workman earning up to $2,500. 2  A workman earning up to $4,500.