For life policies
If the policy is already issued, method of payment includes
1. Debit or credit card
2. Direct credit from your bank account
3. Payment via the insurance company website or app

If you're talking about general insurance, once a quote is given and you're satisfied with the coverage and premium, you may choose to direct bank in to the insurance company bank account and provide the payment receipt to the branch or agent.

Payments can be made via credit card as well by filling up the form to deduct from your credit card.