GST Rate Rationalisation 2026: New 5% & 18% Slabs Explained

India's GST framework underwent its most sweeping structural reform since 2017. Effective September 22, 2025, the CBIC eliminated two rate slabs — 12% and 28% — and consolidated the entire GST rate schedule into a cleaner two-tier structure of 5% and 18%, with a special 40% rate for demerit goods. If your business is still running on old HSN-rate mappings or your CA hasn't walked you through the transition, you are likely filing GSTR-1 with incorrect rates and accumulating reconciliation risk.

This guide cuts through the complexity. It tells you exactly what moved where, which sectors bear the biggest pricing impact, how your ITC position changes, and the specific steps your CA should have already completed — or needs to complete right now.

What the 56th GST Council Decided — and When It Takes Effect

The 56th GST Council meeting, chaired by Union Finance Minister Nirmala Sitharaman, convened on September 3, 2025, and approved a complete overhaul of India's GST rate schedule. The CBIC gave effect to these recommendations through Notification No. 9/2025-Central Tax (Rate) and corresponding Integrated Tax, Union Territory Tax, and State Tax Rate notifications dated September 17, 2025. All changes took effect from September 22, 2025.

The pre-reform structure had four main slabs — 5%, 12%, 18%, and 28% — with the 28% slab also carrying a cess for luxury and tobacco products. This multi-tier structure had been criticised since GST's launch in 2017 for creating classification disputes, ITC chain disruptions, and compliance complexity. The 56th Council addressed all three in a single sweep.

The New Rate Architecture

Where Did the 12% and 28% Items Go?

This is the most critical question for your business. Incorrect rate mapping is the number one GST compliance risk post-September 22, 2025.

From 12% to 5% — Price-Reducing Move

The following major categories were pulled down from 12% to 5%:

• Medical devices and diagnostic kits — blood glucose monitors, surgical instruments, spectacles and frames
• Agarbatti, soaps, and personal care items priced below ₹500 MRP
• Fertilisers and agricultural machinery — tractors above 1800CC previously taxed at 12% now attract 5%
• Packaged dairy products — curd, lassi, butter, and cheese (packed and labelled)
• Medicines under Schedule I of the Drugs List, including cancer drugs previously at 12%

If your business deals in any of these categories, your input cost has dropped. You should revise your selling prices and re-examine your ITC structure. Businesses that now face an inverted duty situation — output at 5%, inputs taxed above 5% — have a refund entitlement under Section 54(3) of the CGST Act. This working capital is sitting unclaimed for many firms that have not filed.

From 12% to 18% — Price-Increasing Move

Not all 12% items moved downward. The following moved up to 18%:

• Textiles priced above ₹2,500 per piece — apparel, dress material, and fabric in the higher price range
• Leather goods — wallets, bags, and footwear above ₹1,000 MRP
• Select repair and maintenance services not involving a principal manufacturer

For a textile retailer with ₹1 crore monthly turnover in garments above ₹2,500, this translates to ₹6 lakh additional GST burden per month — a 6 percentage point rate increase on every sale. Check whether your pricing absorbed this increase or whether your margins took the hit silently.

From 28% to 18% — Major Relief for Consumer Durables

The most celebrated change was eliminating the 28% slab for non-demerit manufactured goods. Key beneficiaries:

• Small passenger cars (up to 1500cc petrol / 1750cc diesel) — from 28% + cess to 18%
• Two-wheelers up to 350cc — from 28% to 18%
• Air conditioners, washing machines, refrigerators, dishwashers — from 28% to 18%
• Large-screen televisions (above 68cm) — from 28% to 18%
• Cement — from 28% to 18%, a significant cost relief for the entire construction sector
• Paints and varnishes — from 28% to 18%

For a white goods dealer holding 100 air conditioners purchased at 28% GST before September 22, 2025, transitional stock management matters. You paid 28% ITC on purchase stock but will bill customers at 18% output — creating an ITC surplus that needs careful GSTR-9 disclosure rather than silent carry-forward.

From 28% to 40% — Demerit Goods Under a New Label

The 40% rate replaces the old 28% + cess structure for luxury and sin goods. This is not a higher effective tax — it is the merger of the base rate and cess into a single clean number:

• Aerated beverages and packaged sweetened drinks
• Luxury motor vehicles (above 1500cc, premium SUVs and sedans)
• Motorcycles above 350cc
• Tobacco, cigars, and cigarettes
• Casino admissions and online gaming real-money entry fees

For businesses in these segments, the effective tax cost is broadly similar to before, but the administrative treatment simplifies because there is no separate cess computation or cess reconciliation in GSTR-3B.

How This Affects Your ITC Position

The rate rationalisation creates three distinct ITC scenarios. Your CA needs to identify which one applies to your business before the next GSTR-3B filing:

Scenario 1 — Your output rate fell (e.g., 12% to 5%): Your ITC on inputs may now exceed your output liability, creating an inverted duty refund entitlement under Section 54(3) of the CGST Act. File a refund application on the GST portal if you haven't already — this is working capital tied up unnecessarily with the government.

Scenario 2 — Your output rate rose (e.g., 12% to 18%): Your output liability increased, and so did the ITC available on inputs taxed at 18%. The net impact depends on your input-output ratio. Recompute your working capital requirement and brief your finance team on the revised cash-flow position.

Scenario 3 — You supply at 18% with inputs also at 18%: Your ITC chain is the cleanest it has been since 2017. No cascading, no blocked credit — provided you remain compliant with Section 16(4) timelines and GSTR-2B matching under the IMS framework.

Step-by-Step Action Checklist

Work through these six steps with your CA before filing your next GSTR-1:

1. 1Audit your HSN-rate master in your accounting software. Every HSN code linked to a 12% or 28% rate must be updated to the correct post-September 22, 2025 rate. An incorrect rate in GSTR-1 cascades into GSTR-3B errors and eventually draws notices under Section 73 or 74 of the CGST Act.

1. 1Issue credit notes for incorrectly rated invoices. If any invoice between September 22, 2025 and March 31, 2026 carried the old rate, issue a GST credit note under Section 34 and file a corrected GSTR-1. The deadline for FY 2025-26 credit notes is the earlier of: (a) the date of filing GSTR-9 for FY 2025-26, or (b) September 30, 2026.

1. 1Reconcile GSTR-2B ITC claims against the new rate structure. Your vendor may have billed at 28% for purchases made after September 22, 2025, which is now incorrect. Dispute the rate with the vendor and obtain a credit note before claiming that ITC in your GSTR-3B.

1. 1Assess transitional stock ITC. If you held stock of goods that moved from 28% to 18%, you paid 28% ITC on purchase but will bill at 18% output. Disclose this surplus ITC correctly in GSTR-9 for FY 2025-26 in the relevant tables rather than carrying it forward silently.

1. 1Update your price lists and customer-facing rate cards. Billing at the wrong rate — whether higher or lower — exposes you to complaints under Section 171 of the CGST Act (anti-profiteering). Customers are entitled to invoices reflecting the current applicable GST rate.

1. 1Prepare a dual-rate GSTR-9 for FY 2025-26. Your annual return must bifurcate the year at September 22 — reporting April-to-September turnover at old rates and October-to-March at new rates. This prevents reconciliation exceptions during departmental scrutiny and audit.

Common Mistakes to Avoid

Billing textiles above ₹2,500 at 12%: This is under-charging GST — 18% applies from September 22, 2025. Detected in scrutiny, you owe the differential tax plus interest at 18% per annum under Section 50(1) of the CGST Act, along with potential penalty under Section 122.

Billing air conditioners and consumer durables at 28%: You are over-collecting from your customer. If the customer files a complaint under Section 171 (anti-profiteering), your business faces a demand equal to the excess collected plus interest — entirely avoidable with a simple HSN-rate update.

Not filing for inverted duty refunds: If your output rate fell from 12% to 5%, you have an ITC refund entitlement under Section 54(3) of the CGST Act. File on the GST portal: Refunds → ITC accumulated due to inverted duty structure. The limitation period is 2 years from the last date of filing the relevant return under Section 54(1) — do not let this lapse.

Treating FY 2025-26 as a single-rate year in GSTR-9: GSTR-9 for FY 2025-26 is due by December 31, 2026. Many businesses are treating the full year as a single-rate year. When GSTR-9 data does not reconcile with GSTR-1 data due to this oversight, it triggers automated mismatch notices from the department.

Key Takeaways

• CBIC Notification No. 9/2025-Central Tax (Rate) dated September 17, 2025 eliminated India's 12% and 28% GST slabs, creating a two-tier structure of 5% and 18%, effective September 22, 2025.
• The 12% slab is gone — most items moved to 5% (medical devices, dairy, agricultural machinery), while select premium items such as textiles above ₹2,500 moved to 18%.
• The 28% slab is gone — consumer durables (air conditioners, cars, washing machines, cement) are now at 18%; luxury and sin goods moved to a new 40% demerit rate that replaces the old 28% + cess structure.
• Inverted duty refund entitlement under Section 54(3) is available if your output rate fell — file within 2 years from the relevant return date before the window closes.
• GSTR-9 for FY 2025-26 (due December 31, 2026) must bifurcate April-September at old rates and October-March at new rates — failure to do this creates reconciliation risk that cannot be easily corrected after filing.

How corpus Helps

corpus maintains a live GST rate database linked to every HSN and SAC code in your product master. When CBIC issued Notification No. 9/2025-CT(R) in September 2025, corpus flagged all affected HSN codes and guided users through a rate-update workflow within their chart of accounts. When you generate a GSTR-1 or e-invoice in corpus today, the platform pulls the current applicable rate automatically — eliminating the risk of billing at legacy 12% or 28% rates entirely.

corpus also pre-populates the dual-rate split in your GSTR-9 draft for FY 2025-26, automatically bifurcating April-September and October-March columns so your CA can review and certify in minutes. The ITC reconciliation module inside corpus cross-checks your GSTR-2B inflows against the new rate structure and flags vendors still billing at old rates before you claim that ITC.

Start your corpus account today and let the platform keep your GST rates permanently current — so your compliance stays clean and your reconciliations stay simple.