## Zoho Billing - Product, solutions, integrations, support, and resources Index Access the complete documentation index at: https://www.zoho.com/om/billing/llms.txt Use this file to discover all available documentation pages before proceeding. [Back](./) # Can I use my existing payment gateway or do I need to change? Yes, you can use your existing payment gateway. You will have to configure a payment gateway in Zoho Billing using your existing merchant account and payment gateway credentials to process online payments.