GST Collection March 2026 — The ₹2 Lakh Crore Historic Milestone

For the first time in FY 2025-26, gross GST collection crossed the ₹2 lakh crore mark in March 2026. The official figures released on 1 April 2026 confirmed gross GST revenue of ₹2,00,064 crore — a remarkable year-end surge driven by businesses settling pending dues and reconciling invoices before 31 March 2026.

The breakup of March 2026 gross collection is as follows: CGST at ₹40,549 crore, SGST at ₹53,268 crore, and IGST at ₹1,06,246 crore. IGST — reflecting inter-state trade and imports — remained the dominant component, consistent with India’s robust goods movement across state borders in the year-end quarter.

For the full year FY 2025-26, gross GST collection stood at ₹22,27,096 crore, up 8.3% from ₹20,55,515 crore in FY 2024-25. This represents twice the collection recorded just five years ago — a signal of a significantly widened and better-enforced tax base. Maharashtra remained the top state for gross GST revenue, followed by Karnataka, Gujarat, Uttar Pradesh, and Tamil Nadu.

GSTN Advisory: GSTR-3B Tax Liability Breakup Change — 16 March 2026

On 16 March 2026, GSTN issued an important advisory that has changed the way GSTR-3B is filed from the February 2026 tax period onwards. This change affects every GST-registered taxpayer who has any interest liability or prior-period tax dues to discharge in the current GSTR-3B.

What Changed in GSTR-3B?

The GST portal now auto-populates the “Tax Liability Breakup, As Applicable” tab on the payment page of GSTR-3B. This tab captures any interest or tax liability belonging to a previous tax period that is being paid in the current return period. Previously, taxpayers could proceed directly to payment. Now, there is a mandatory step in between.

This advisory is part of a broader shift by GSTN towards system-driven interest computation — reducing reliance on taxpayer self-declaration and improving the accuracy of GST ledgers. CA firms and businesses using ASP/GSP software should confirm that their platforms have been updated to support this mandatory SAVE step before filing returns for February 2026 onwards.

New REG-32 Facility — CGST Rule 14A Registration Withdrawal Made Easier

GSTN introduced a significant new portal facility in March 2026 — Form REG-32 — which allows taxpayers who opted into the simplified 3-working-day GST registration route under CGST Rule 14A to apply for withdrawal online. This addresses a long-standing compliance friction for small businesses that had entered the scheme but wished to exit.

What is CGST Rule 14A?

Under CGST Rule 14A, small suppliers whose monthly output tax liability does not exceed ₹2.5 lakh can obtain GST registration within 3 working days without undergoing the standard physical verification process. The scheme was designed to encourage formal registration among micro businesses.

What Changed with REG-32?

The withdrawal from Rule 14A registration takes effect from the first day of the month following the month in which the withdrawal is approved. After withdrawal, the taxpayer transitions to the standard GST registration process including normal return filing obligations. This is particularly relevant for small service providers who initially registered under Rule 14A but whose business scale or nature changed.

GSTAT Fully Operational — GST Appeal Deadline Set at 30 June 2026

After an eight-year appellate vacuum, the GST Appellate Tribunal (GSTAT) is now fully operational. The Principal Bench in New Delhi and several State Benches are actively hearing cases. March 2026 brought a critical update: the final deadline for filing appeals before GSTAT for all orders communicated before 1 April 2026 has been fixed at 30 June 2026.

The Scale of the Backlog

The absence of GSTAT for eight years meant that over 4 lakh First Appellate Authority orders had no second-appeal forum — forcing taxpayers to approach High Courts via writ petitions. With GSTAT now operational, all these taxpayers can file second appeals before the Tribunal. High Courts across India have already begun declining jurisdiction in favour of GSTAT in appropriate cases.

Pre-Deposit Requirements at GSTAT

The mandatory pre-deposit for GSTAT appeals has seen two significant changes:

Additionally, as of March 2026, GSTAT’s Principal Bench has been designated as the National Appellate Authority for Advance Rulings (NAAAR) — meaning conflicting Advance Ruling Authority orders from different states will now be resolved at the national level, creating a more uniform GST jurisprudence. Refer to the complete guide on GST demand notices under Sections 73 and 74 for appeal preparation strategies.

For official GSTAT procedural rules and appeal filing, visit: gst.gov.in and cbic.gov.in.

IMS Updates in March 2026 — Invoice Management System Compliance

The Invoice Management System (IMS) — launched in October 2024 — has been progressively expanded and made more stringent through 2025-26. Several key developments in this area are critical for year-end compliance in March 2026.

IMS Actions Must Be Completed Before GSTR-3B Due Date

Under IMS, every B2B invoice, debit note, and credit note uploaded by your supplier appears on your IMS dashboard. You must take action — Accept, Reject, or Keep Pending — before the due date of GSTR-3B for the relevant tax period. Failing to act means the system defaults to “Deemed Acceptance,” which may include invoices on which ITC is ineligible.

For the Jan–March 2026 quarter (Q4 FY 2025-26), the last date to take IMS action on pending records is the due date of GSTR-3B for January-March 2026. This is particularly important for QRMP-scheme taxpayers who file GSTR-3B quarterly. After this deadline, the “Pending” action will be disabled for that quarter’s records.

Import of Goods Now in IMS

From the October 2025 tax period, Bills of Entry (BoE) for import of goods — including SEZ imports — are now visible in the IMS. Taxpayers can accept or reject BoE records on the IMS dashboard. This brings import-linked ITC claims under the same reconciliation framework as domestic supplier invoices.

Hard Validation — No More Warnings on ITC Mismatches

GSTN has confirmed that the portal is moving from warnings to hard validations for ITC claims. From 2026, if the ITC claimed in Table 4D(1) of GSTR-3B exceeds the closing balance in the Electronic Credit Reversal and Reclaimed Statement (ECRS), the system will block filing. Similarly, if RCM ITC claims exceed the RCM liability ledger, filing is blocked.

Year-End GST Compliance Deadlines — Complete March 2026 Checklist

March 2026 was the last month of FY 2025-26. Businesses that failed to complete these obligations now face compounding interest, ITC blocks, and eligibility restrictions for FY 2026-27. Here is every significant deadline that fell in or around March 2026.

E-Invoicing Expansion from 1 April 2026 — Critical Action Points

March 2026 was the last month for businesses newly falling under the e-invoicing mandate to register on the Invoice Registration Portal (IRP) and configure their systems. From 1 April 2026, any business whose Aggregate Annual Turnover (AATO) exceeded ₹5 crore during FY 2025-26 for the first time must mandatorily generate e-invoices.

E-Invoicing: Who Must Comply from 1 April 2026?

E-invoices generated on the IRP auto-populate data into GSTR-1 and e-way bills, eliminating manual data entry errors. Failure to generate a valid e-invoice results in an invalid tax invoice — the buyer cannot claim ITC, and the seller may face scrutiny. Register on the IRP well before 1 April 2026 and test the integration with your accounting software.

LUT Filing, Composition Scheme Opt-In & Other March 31 Deadlines

The 31 March 2026 deadline cluster is arguably the most consequential compliance milestone of the entire financial year for exporters, small businesses, and partnerships. Missing any of these has cascading consequences for FY 2026-27.

Letter of Undertaking (LUT) for FY 2026-27

Every exporter and supplier to SEZ units who makes zero-rated supplies without payment of IGST must file a fresh LUT for FY 2026-27 by 31 March 2026. The LUT filed for FY 2025-26 expired on 31 March 2026 and is no longer valid from 1 April 2026.

How to file LUT: GST Portal → Login → Services → User Services → Furnish Letter of Undertaking → Select FY 2026-27 → Complete declaration → Submit. The process is free of cost, takes under 5 minutes, and is available 24×7 on the portal.

GST Composition Scheme — CMP-02 Deadline

Small businesses with aggregate annual turnover up to ₹1.5 crore (₹75 lakh for pure service providers) who wish to opt into the Composition Scheme for FY 2026-27 must file Form CMP-02 by 31 March 2026. Late filing means you are ineligible for the Composition Scheme for the entire FY 2026-27 and must comply with regular GST provisions — including filing GSTR-1 and GSTR-3B every month.

If you switch to the Composition Scheme, you must also file Form ITC-03 within 90 days (by 30 May 2026) to reverse the ITC on the closing stock of inputs and input services as on 31 March 2026. Failure to reverse ITC will block future GSTR-3B submission and attract interest and penalty. For a full understanding of the Composition Scheme’s benefits and limitations, see our comprehensive GST Composition Scheme guide.

Export Refund — ₹1,000 Minimum Threshold Removed

A taxpayer-friendly change effective from 1 April 2026: the condition that export refund claims below ₹1,000 would not be processed has been removed from the law. Every valid refund claim — regardless of how small the amount — will now be processed. This directly benefits micro and small exporters who had previously abandoned small-value refund claims due to this minimum threshold.

ITC Reconciliation — Rule 42, Rule 43, and Year-End Obligations

The financial year-end triggers a series of mandatory ITC reversal computations that every GST-registered business must complete before finalising its GSTR-3B for March 2026. These are not optional — non-compliance results in interest on excess ITC claims, future GSTR-3B blocks, and exposure during GST audit.

Rule 42 — ITC on Inputs and Input Services (Mixed Use)

Where inputs or input services are used partly for taxable supplies and partly for exempt supplies, Rule 42 requires an annualised reversal computation at year-end. The provisional monthly reversal done throughout FY 2025-26 must be reconciled against the actual annual reversal figure. If excess ITC was claimed, the difference plus interest at 18% per annum must be reversed in the GSTR-3B for March 2026.

Rule 43 — ITC on Capital Goods (Mixed Use)

Similarly, Rule 43 governs ITC on capital goods used for both taxable and exempt supplies. The annual reversal must be computed based on the actual exempt-supply ratio for FY 2025-26 and adjusted in the March 2026 return.

Rule 37 — Reversal for Non-Payment to Vendors Within 180 Days

If any vendor invoice for which ITC was claimed during FY 2025-26 remains unpaid beyond 180 days from the date of supply, the ITC on that invoice must be reversed in GSTR-3B. The reversal is required by the due date of the GSTR-3B for the period in which the 180-day window expired. ITC can be re-claimed once the vendor is paid. Year-end is a critical time to identify and settle old creditor balances specifically to avoid this reversal.

For a detailed understanding of ITC claim eligibility, reversal rules, and blocked credits, see our GSTR-2B and ITC reconciliation guide and the official GST tutorial portal maintained by GSTN.

GST Updates March 2026 — Key Highlights Infographic

Frequently Asked Questions — GST Updates March 2026

Conclusion — Entering FY 2026-27 on a Clean GST Footing

March 2026 was, by every measure, a landmark month for GST in India. The ₹2 lakh crore collection milestone signals a tax system operating with significantly improved enforcement and compliance culture. The series of GSTN advisories — particularly the GSTR-3B Tax Liability Breakup change, the REG-32 facility, and the IMS hard validation direction — signals that the portal is moving towards system-driven compliance where human error and deliberate manipulation are progressively reduced.

For businesses, the message is clear: passive compliance is no longer adequate. Active reconciliation of IMS invoices, prompt ITC reversal at year-end, timely LUT renewal, and readiness for e-invoicing expansion are no longer best practices — they are baseline requirements. The GSTAT operationalisation and the 30 June 2026 appeal deadline offer a final opportunity to resolve the enormous backlog of disputed demands that have accumulated over eight years.

Use the detailed checklist and infographic in this guide to review your organisation’s GST position, assign responsibilities to your accounts team, and ensure that every March 2026 obligation is either completed or actioned before the consequences cascade into FY 2026-27.