Per Diem Rates. Calculation of travel per diem rates within the Federal government is a shared responsibility of three organizations: 1  The General Services Administration (GSA) prescribes rates for the Continental U.S. GSA updates the Continental U.S. rates once a year, or as necessary.alculation of travel per diem rates within the Federal government is a shared responsibility of three organizations:
How you account for your bad debts will depend upon whether you use the cash basis or the accrual basis of accounting. If you use the cash basis, you recognize income only when a payment is received.
Topic Number: 453 - Bad Debt Deduction. If someone owes you money that you can't collect, you may have a bad debt. For a discussion of what constitutes a valid debt, refer to Publication 550, Investment Income and Expenses, and Publication 535, Business Expenses.