50% usually for the rest. Truckers usually are allowed 80% of a $59 per diem rate. While the rest are allowed 50% of a $46 per diem rate. Some locales have higher rates, and exceptions can apply, but generally the $59/$46 and 80%/50% rates will apply to most circumstances.You may wish to research more if the trucker is self employed, or an employee etc.hile the rest are allowed 50% of a $46 per diem rate. Some locales have higher rates, and exceptions can apply, but generally the $59/$46 and 80%/50% rates will apply to most circumstances.