SM - a master's degree in science Master of Science, MSc, MS master's degree - an academic degree higher than a bachelor's degree but lower than a doctor's degree
DEFINITION of 'Per Diem Payments'. Generally, a specified amount that employers will pay to employees as reimbursement for various expenses. Per diem payments usually assume a set dollar limit, such as $30 per day for meals or $100 per day for lodging. These payments are usually made for employee travel expenses.er diem payments are usually counted as nontaxable income to employees, up to a certain amount, and any excess reimbursement is included in box 12 of the W-2 form. The IRS allows a preset amount to be excluded from taxation for each type of per diem expense. RELATED TERMS.
A per diem allowance is a fixed amount of daily reimbursement your employer gives you for your lodging, meals, and incidental expenses when you are away from home on business. (The term incidental expenses is defined in chapter 1 under Standard Meal Allowance.he standard meal allowance is for a full 24-hour day of travel. If you travel for part of a day, such as on the days you depart and return, you must prorate the full-day M&IE rate. This rule also applies if your employer uses the regular federal per diem rate or the high-low rate.