Remember: Actual card and loan conditions depend on the financial institution's approved terms and contract.
Understand the three dates
Purchase date, statement date, and payment due date are different.
Full payment is the simplest cost control
Paying the full statement balance by the due date generally avoids revolving-interest cost.
A limit is not a budget
Approved credit capacity does not mean you can sustainably spend that amount.
Put cards inside the household budget
Card spending is still spending.
Official reference
Taiwan Banking Bureau — proper credit-card use ↗
General financial education only. Not a lending offer, personal credit determination, or individualized borrowing advice.