What happens if you don't tap off?
What happens if you don't tap off? Missed Tap Off Cost If you don't have a default set on your card and you forget to tap off at the end of your trip, you'll be charged the fare to the last stop on the train line or bus route and with your fare type and any applicable loyalty discounts applied.
What do bus drivers see when you tap in?
You tap in and the machine immediately deducts the flat fare. The driver will see you do this and challenge you if you don't. It's a flat fare for a trip of any length and this makes tapping out unnecessary. Indeed flat fares were introduced to make this work.