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GST registrationCBIC · GSTN
Above ₹20 lakh turnover · CBIC
Required once aggregate turnover crosses the threshold — ₹40 lakh for goods and ₹20 lakh for services in most states — and in some cases from the first sale, such as most inter-state supplies of goods.
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Fire NOCState fire service
Above the seating or area limit · State fire dept
A no-objection certificate from the state fire service confirming the building meets fire-safety norms. Whether you need one depends on the state's fire rules — usually on occupancy, seating capacity, floor area or building height.
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ESI & PF registrationEPFO · ESIC
10 / 20+ employees · ESIC, EPFO
Provident fund applies from 20 employees and ESI from 10 (in notified areas). Registration is due once you cross the count, and monthly contributions follow.