GST Registration in Mumbai – A Complete Guide for Businesses Mumbai, the financial capital of India, is home to thousands of startups, entrepreneurs, traders, and service providers. With the introduction of Goods and Services Tax (GST), businesses must be registered under the GST regime to operate legally and expand their client base. If you are planning to start a business in Mumbai or already running one, understanding GST registration in Mumbai is crucial. In this blog, we will walk you through everything you need to know about GST registration, its benefits, eligibility, documents required, and a step-by-step process to apply for GST number in India without errors or delays.