Six GST changes in FY 2026-27 every Indian SMB should know

FY 2026-27 is the tenth financial year of GST — and the first full financial year to run entirely on the new rate structure. The headline change happened mid-2025: GST 2.0 collapsed the slabs. The rest is a steady tightening of the ITC regime. Here are the six changes that actually affect how Indian SMBs run their books this year, starting with the one that touches every invoice you raise.

1. GST 2.0 — three slabs (5% / 18% / 40%), no more 12% or 28%

This is the change that reaches every invoice. The 56th GST Council, which met on 3 September 2025, rationalised the rate structure with effect from 22 September 2025. The old four-rate structure is gone. GST now runs on three rates: 5%, 18% and 40%. The 12% and 28% slabs have been abolished.

• Most goods that sat at 12% moved down to 5% — processed foods, several daily-use items, and a range of services.
• Most goods that sat at 28% moved down to 18% — including cement, air-conditioners, televisions and small cars.
• A new 40% rate applies to a short list of sin and luxury goods — pan masala, gutkha, tobacco, aerated drinks, large cars and online money gaming. For most of these the erstwhile compensation cess has been merged into the 40% rate (cess continues separately on tobacco and pan masala until the Government decides otherwise).
• The nil (0%) rate and the special 3% rate on gold and precious metals are unchanged.

Practical implication: re-rate your item masters. Any product still carrying a 12% or 28% tax code is now wrong, and a wrong rate flows straight into GSTR-1 and GSTR-3B as understated or overstated output tax. If your accounting software hard-codes the old slabs, that is a problem you fix before the next return — not after a notice. (Our GST calculator and GST guide already reflect the new rates.)

2. e-Invoice threshold remains at ₹5 crore

The e-Invoice threshold stays at ₹5 crore aggregate turnover for FY 2026-27. A further drop to ₹3 crore has been discussed in the trade press for a while now, but nothing to that effect has been notified — so the rule on the books is unchanged.

Practical implication: if your turnover in any FY since 2017-18 has crossed ₹5 crore, you continue to generate IRN + QR for every B2B invoice. If you're between ₹3 and ₹5 crore, you have one more year of relief — but assume the threshold will drop in FY 2027-28 and prepare now. (For the mechanics of generating and filing IRNs, see our e-Invoice guide.)

3. GSTR-9 simplified for sub-₹2 crore taxpayers (continued)

The exemption from GSTR-9 for turnover below ₹2 crore continues. For turnover between ₹2 and ₹5 crore, the simplified return form remains optional. Above ₹5 crore, full GSTR-9 + GSTR-9C remain mandatory.

Practical implication: most genuinely small businesses no longer owe an annual return. The mid-tier (₹2-5 crore) should choose whether the simplified form is worth the time saving — typically yes if your monthly returns are clean.

4. ITC reversal under Rule 37 tightened

Rule 37 requires ITC reversal where you haven't paid the supplier within 180 days. The clarifications this year tighten the timing of when the reversal must happen and what evidence is sufficient to claim the ITC back once payment is made.

Practical implication: maintain a vendor ageing report. Identify invoices approaching the 180-day window. Either pay or reverse the ITC proactively in the relevant month's 3B. Don't wait for the audit notice.

5. Section 16(4) ITC time limit — legislative relief via 16(5) and 16(6)

Section 16(4) of the CGST Act sets a hard deadline for claiming ITC — generally the November of the following financial year. The relief here was legislative, not judicial: the Finance (No. 2) Act, 2024 inserted sub-sections 16(5) and 16(6) with retrospective effect from 1 July 2017, extending the time limit in specific situations (the FY 2017-18 to 2020-21 invoices, and credits tied to cancelled-then- revived registrations). CBIC Circular 237/31/2024 set out how it works in practice.

Practical implication: track ITC by vintage. Identify invoices from FY 2024-25 that may still have a Section 16(4) deadline this year, and check whether any older credit qualifies for relief under 16(5) or 16(6). Don't let claimable ITC lapse to a technicality.

6. e-Way bill threshold and validity tweaks

Several states have tweaked their intra-state e-Way bill thresholds. The validity rules for inter-state consignments — particularly for multi-leg journeys and stoppages — have been clarified.

Practical implication: if you operate across states, refresh your e-Way bill SOP with your logistics partner. Re-train the dispatch team. A wrong e-Way bill at the toll plaza is a real-time business risk.

What hasn't changed

The filing machinery is stable. The GSTN portal is steady. The monthly cycle is the same rhythm: GSTR-1 by the 11th, GSTR-3B by the 20th, and ITC matching against GSTR-2B in between. The slabs moved, but the calendar did not.

If you ran a clean GST regime in FY 2025-26, FY 2026-27 will feel familiar once the item masters are re-rated. The shifts are at the edges — ITC discipline, audit readiness, and treating GST as a continuous reconciliation rather than a month-end scramble. The same reconciliation discipline we walk through in the seven causes of GSTR-2B mismatch and closing GSTR-1 in 60 minutes still carries the month.

— Ayush