Each border renewal carries the I-94 fee and the cost of a new letter and current certification; each USCIS extension carries the Form I-129 fee on the published schedule, ordinarily paid by the employer. The recurring cost is the health-care certification and state licence, not the immigration fee.
Small fees, repeated; certification costs on their own cycle
Government charges for TN depend on the filing route. A Canadian citizen applying at a port of entry pays the I-94 issuance fee to Customs and Border Protection at each admission, and there is no visa application fee because Canadians are visa-exempt. Where the employer files Form I-129 to extend or amend status, the filing fee is the amount on the USCIS fee schedule, Form G-1055, with premium processing available for an additional published fee; those are employer costs.
A physiotherapist may also face professional expenses for renewing the state licence and the health-care worker certification, each on its own schedule and at the issuing body’s current fee. The total depends on the filing route and the professional fees then in force and should not be assumed from a fixed comparison. If a permanent-residence step is added later, its fees are separate and should be budgeted when that plan is made.
Fee amounts change, so the current schedule should be checked before each filing.