The UK ETA Cost is a government application fee that must be paid when submitting an ETA application. The amount can change, so travellers should check the latest official UK government fee before applying rather than relying on older travel websites. Be careful with third-party websites that add service charges on top of the official fee. Before making payment, confirm that you are using the correct application route and entering the details for the passport you will use to travel. Keep your payment confirmation after submitting the application. Checking the current fee first helps you understand the real cost and avoid paying unnecessary charges to unofficial services.