Ask whether the employer covers review of the changed duties and any required document or immigration step. Keep those costs separate from temporary lodging, travel and per-diem policies. Do not assume an internal rotation creates either no immigration cost or a mandatory new filing fee.
Budget after the scope is assessed
First identify what work changes and whether an additional procedure is required. Then check the applicable current charges. The employer can separately confirm what it pays for the assignment, including whether reimbursement depends on completing the rotation.
Government charges are modest and depend on the route: a fee collected at the port of entry for an in-person application, or the Form I-129 petition fee where the employer files, with premium processing as an optional extra. Price the TN preparation by separating official filing or admission charges from optional professional work such as legal analysis, credential evaluation, translation, licensing review, or a confidentiality protocol. Government fees differ between a port-of-entry application by a Canadian citizen and an employer petition, and current amounts should be checked against the published USCIS fee schedule rather than a figure quoted from a previous case. A CBP admission request and an employer-filed USCIS petition involve different government charges, preparation time, and evidence presentation, while neither charge replaces the need for a qualifying position.