GST 2.0: What the New Rate Slabs Mean for Your Business

GST 2.0, effective 22 September 2025, collapsed the old four-slab structure into a simpler system: 5% and 18% now cover the overwhelming majority of goods and services, alongside the existing 0% nil-rated category. A new 40% slab was introduced, but it’s deliberately narrow — reserved for sin and luxury goods such as tobacco, aerated drinks, and high-end vehicles, not a general replacement for the old 28% bracket.

For most businesses, this means a genuine reclassification exercise, not a cosmetic rate change. Items that used to sit at 12% have generally moved to either 5% or 18% depending on their specific classification, and most goods that were at 28% have moved down to 18%. The specific HSN/SAC code your product or service falls under determines where it landed — assuming a uniform shift across your whole catalogue is the most common mistake we see.

The transition itself creates practical friction: invoicing software, ERP tax codes, published price lists, and any vendor or customer contract with a fixed-price-plus-GST clause all need to be checked against the new rate, not just updated on faith. Stock purchased under the old rate but sold after the changeover also needs careful handling on the input tax credit side, since a mismatch here is exactly the kind of thing that surfaces later as a GSTR-2B reconciliation discrepancy.

The practical checklist: map every HSN/SAC code you bill under to its post-reform slab, update billing systems before your next invoicing cycle rather than mid-cycle, and review any contract where GST is quoted as a fixed add-on rather than "as applicable." If you’re not certain whether a specific product or service actually moved slabs or stayed put, that classification question is worth confirming before it shows up as an error on a return.