W-2 Box 12 Code L represents which type of reimbursements?

W-2 Box 12 Code L indicates nontaxable employee business expenses that have been reimbursed to the employee. This code specifically reflects the amount that the employer provides as reimbursement for certain expenses incurred in the course of carrying out job duties. Since these reimbursements are considered nontaxable, they do not need to be reported as income by the employee, effectively reducing the employee's taxable income.

Understanding this classification is vital, as it helps employees correctly interpret their W-2 forms, ensuring that they do not inadvertently report nontaxable reimbursements as taxable income, which could lead to potential underreporting or overpayments of their taxes.