Why are there two systems in my account? How will I know how many Miles are outstanding and when will the Miles expire under the two systems?

We hope to enhance members’ experience while minimising any disruption brought by the new arrangement and there will be a transitional arrangement.
There are two ways to keep track of your Miles expiry status.
One is via the monthly statement which is sent to your registered email every month.
Another way to keep track is to log into your account via Cathay website or mobile apps.
Once you log into your account, you’ll find the Miles placed under two systems – the time-based system and the new activity-based system.
For Miles under the time-based system, an expiration date will be shown so you can keep track of the Miles’ due date.
For Miles placed under the new activity-based system, you will only find the last Miles crediting or debiting date. You can keep track of the expiration date of the Miles in the activity-based system by adding 18 months to the last crediting or debiting date.