When a Postal Service™ employee is overpaid, the Postal Service establishes an account receivable for the overpayment and initiates the collection of the debt from the employee through the process described in the Employee and Labor Relations Manual (ELM), in either ELM 450, Collection of Postal Debts From Non-bargaining Unit Employees by Salary Offset, or ELM 460, Collection of Postal Debts From Bargaining Unit Employees by Salary Offset.
If the overpayment occurred in a prior year, the Postal Service bills the employee for the gross amount of the overpayment. The gross amount includes the net amount of the check or direct deposit plus all payroll-related taxes withheld and other miscellaneous deductions or allotments. The wages paid in error in the prior year remain W-2 reportable and taxable to the employee for that year. This is because the employee received and had use of those funds during that year. If repayment is made within 3 years of the issuance of the W-2 that includes the overpayment, the employee is entitled to a refund of Social Security (if applicable) and Medicare taxes from the Postal Service. The employee is not entitled to file an amended return (Form 1040X) to recover the federal income tax paid on these wages. Instead, the employee may be entitled to a deduction (or credit in some cases) for the repaid wages on his or her income tax return for the year of repayment (Internal Revenue Service Publication 15). Employees are encouraged to seek the services of a qualified tax preparer if they have questions.
If the overpayment occurred in the current year, the Postal Service initially bills the employee for only the net value of the overpayment; thus, federal, state, local, Social Security (if applicable), and Medicare taxes are not part of the bill. However, if an employee has not fully repaid the overpayment by the end of the tax year (December 31, 2018), the Postal Service must report the unreturned value of the overpayment as taxable income on the employee’s Form W-2. Additionally, the employee must now pay appropriate federal, state, local, Social Security (if applicable), and Medicare taxes on the remaining value of the unpaid debt. The Postal Service establishes a second account receivable at the close of the tax year for the value of the taxes the employee owes related to the unpaid debt. The Postal Service uses the debt collection processes in ELM 450 and ELM 460 to collect the additional debt.
— Payroll, Controller, 11-8-18
