Is it permissible to use a US bank credit card for online purchases, while one is always paying all credit card bills well before due date to avoid any interest?
Bismillahi Ta’ala
Walaikum Assalam Warahmatullah
In principle, a loan which has an interest-free period or a grace period to pay out the loan will be permissible as long as one is confident to pay out the amount before the grace period finishes. However, there is important detail in this. Please read the full answer carefully at : https://fatwa.ca/taking-a-loan-with-a-grace-period-for-interest-free-payback/
Wallahu A’lam
And Allah Ta’āla Knows Best
Mufti Faisal al-Mahmudi