1. Deferred deduction: This is the most common situation. As the ETC deduction is generally delayed, it may take several days to deduct the fee after crossing the road.

2. The toll is low, and the bank has not sent the deduction information: if the toll is low, the bank may not deduct the money immediately. In this case, you may need to reach a certain fee threshold before the bank will deduct money.

3. Abnormal bank card status leads to unsuccessful fee deduction: if the bank card status is abnormal, such as loss reporting, freezing, etc. , which may lead to unsuccessful deduction.

4.ETC system failure: although this situation is not common, it may happen. If the ETC system fails, but the vehicle has passed, there may be no charge deduction information.

5. Preferential activities of banks or high-speed companies: Sometimes, banks or high-speed companies will provide free ETC access services to attract customers or promote ETC systems.

6. Being too close to the vehicle in front when getting off the expressway: If the vehicle is too close to the vehicle in front when getting off the expressway, the ETC system may not recognize it correctly, so there is no penalty.

If you encounter the problem that ETC does not deduct fees, it is recommended to contact relevant institutions in time to understand the specific reasons and seek solutions.