👉 Always pay a week before due date.
I would worry more about DPD showing up in my CIBIL report than a minor late payment fees.
I had missed a payment by a day last year. On realising, I immediately paid it using issuer bank's own payment system so that it reflects in card account immediately (cashback/duplicate payment be damned). I also dropped an email requesting late payment not showing up in CIBIL.
Also, I think there's 3 days grace period after due date and if you pay within that, it's not reported.