GST Filing in India Important Dates_ Alacrity

GST Filing in India: Important Dates, Rules, and a Step-by-Step Compliance Guide

For both newly incorporated Indian enterprises and foreign subsidiaries establishing a footprint in the subcontinent, India’s Goods and Services Tax (GST) framework is one of the most critical regulatory systems to master.

Designed as a unified destination-based indirect tax, GST replaced several earlier levies including excise duty, service tax, and VAT. Its digital reporting system requires regular and continuous monitoring. Missed deadlines, data entry errors or incorrect credit claims may lead to late fees, interest where applicable, notices, or cash flow and operational issues.

This guide covers key GST rules, critical filing dates, common pitfalls, and a practical process for maintaining consistent GST compliance in India.

1. Key GST Return Types and Deadlines:

Under the standard monthly return filing cycle for regular taxpayers, compliance revolves around three core return filings, supplemented by annual reconciliations.

Return Type

Description

Frequency

Statutory Due Date

GSTR-1

Statement of outward supplies (sales invoices, credit/Debit notes, and export supplies), where applicable.

Monthly (or Quarterly under QRMP)

11TH of the following month (Monthly filers) / 13th of the month post quarter (QRMP) ); subject to applicable notifications.

GSTR-2B

System-generated Input Tax Credit (ITC) statement based on suppliers' GSTR-1 filings.

Monthly

Available on the 14th of the following month (Static statement) ; review applicable IMS actions and portal updates before filing GSTR-3B.

GSTR-3B

Self-assessed summary return showing tax liability, eligible ITC claimed, and tax payment.

Monthly (or Quarterly under QRMP Scheme)

20th of the following month (Monthly filers)/ 22nd or 24th (State-wise for QRMP)

GSTR-9

Annual Return consolidating financial year’s return data; filing requirement and any exemption depend on the law and applicable notifications.

Annually

31ST December following the close of the financial year

GSTR-9C

Self – certified reconciliation statement between the annual return and Audited Financial Statements; (Mandatory if aggregate turnover exceeds Rs. 5 crore)

Annually

31st December following the close of the financial year

2. Essential Rules Every Business Must Know:

ITC Eligibility and Reconciliation:

Input Tax Credit (ITC) is subject to the conditions stipulated in Section 16 of the CGST Act and the applicable rules. These include, among other requirements:

The recipient must possess valid tax invoice or other prescribed document, receive the goods or services, and satisfy the applicable conditions for the supplier to furnish the invoice details and for those details to be communicated to the recipient; and

The invoice details should be checked against the buyer’s GSTR-2B along with the other statutory conditions, including payment of tax to the Government and filing of the recipient’s return. A mismatch should be investigated; a claim that does not meet the applicable conditions may be denied or reversed, with interest or penalty where legally applicable.

Sequential Filing Requirement

Portal restrictions apply to filing sequence in specified cases. For example, Rule 59(6) of the CGST Rules a monthly filer may be restricted from filing GSTR-1 if GSTR-3B for the preceding month has not been filed. A QRMP taxpayer may be restricted from filing GSTR-1 or using the Invoice Furnishing Facility (IFF) if GSTR-3B for the preceding tax period has not been filed. Check the GST Portal’s current validation for the taxpayer and tax period, as filing sequence may vary by filing frequency and return.

E-Invoicing Mandate

E-invoicing generally applies to registered persons whose aggregate turnover was Rs. 5 Crore or more in any preceding financial year from 2017-18 onwards, subject to generate specified exclusions. Where the mandate applies, covered documents must be reported to an Invoice Registration Portal (IRP) to obtain an Invoice Reference Number (IRN) and QR code. A document covered by the mandate but issued without an IRN may be treated as an invalid invoice under the CGST Rules. Confirm the taxpayer’s eligibility, exclusions, document scope and applicable IRP reporting time limit before issuing invoices.

Reverse Charge Mechanism (RCM)

Under the reverse charge mechanism (RCM), the recipient—not the supplier—is liable to pay GST in specified cases. Examples include notified legal services, specified Goods Transport Agency (GTA) services and taxable imports of services, including certain services from overseas related parties. RCM tax must be paid through the electronic cash ledger; existing ITC cannot be used to pay it. The recipient may claim ITC of the RCM tax paid, subject to the usual eligibility conditions. .

3. Step-by-Step GST Filing Process

Step 1: Data Aggregation & Invoicing Hygiene

Collate sales and service invoices, credit/debit notes, and advances received relevant to GST for the tax period. Verify the supplier’s 15-character GSTIN and, where applicable, the recipient’s GSTIN, place of supply, and applicable HSN/SAC codes..

Step 2: Filing GSTR-1 (By the 11th)

Upload B2B invoices, B2C summaries, and export transactions to the GST portal. Verify applicable tax rates (CGST, SGST, IGST, or Cess). File using Digital Signature Certificate (DSC) or Electronic Verification Code (EVC).

Step 3: ITC Reconciliation with GSTR-2B (By the 15th)

Download GSTR-2B generally generated on the 14th (quarterly for QRMP taxpayers). Reconcile it line by line with your purchase register; review Invoice Management System (IMS) actions and recomputed GSTR-2B if needed. . Flag any missing vendor invoices immediately to follow up with suppliers before filing GSTR-3B.

Step 4: Liability Assessment & Cash Ledger Offset

Set off eligible ITC against output tax liabilities as permitted. Pay RCM in cash. Generate a challan for any additional cash required and deposit it in the electronic cash ledger using an available payment mode, such as net banking or NEFT/RTGS. .

Step 5: Filing GSTR-3B (By the 20th)

Reconcile tax liabilities with GSTR-1 and eligible ITC with GSTR-2B and your books. Offset liabilities using the electronic credit and cash ledgers, then file GSTR-3B. .

Step 6: Financial Year-End Harmonization (GSTR-9 & 9C)

At the close of the financial year, reconcile the year’s GSTR-1 and GSTR-3B returns with the final audited financial statements. Review any spill-over adjustments and report or explain differences in the applicable annual return and reconciliation statement.

4. Common GST Pitfalls for New & Foreign Companies

Claiming ITC on Blocked Items:

Under Section 17(5) of the CGST Act, ITC is blocked on specified expenses, including certain motor vehicles, food and beverages, outdoor catering, club memberships and employee health insurance, subject to statutory exceptions. Ineligible ITC should not be claimed or, if claimed, must be reversed. Interest at 18% per annum applies only where wrongly availed ITC has also been utilized.

Ignoring Place of Supply Rules on Cross-Border Transactions:

Classifying a transaction as an export or inter-state supply without meeting the statutory definitions can lead to disputes. For instance, services provided to a parent company abroad must meet all the criteria for an “export of services,” including receipt of payment in convertible foreign exchange or in Indian rupees where permitted by the RBI, to qualify as a zero-rated supply..

Delayed Reconciliations:

Postponing vendor reconciliation until the year-end can result in ITC loss.. If a vendor fails to furnish invoice details in their return or furnishes them incorrectly, you may be unable to claim the ITC unless the issue is corrected within the applicable time limit..

4. Late Filing Fees & Interest Accumulation:

A delay in filing GSTR-3B may attract a per-day late fee, subject to applicable caps. If tax is paid late, interest generally at 18% per annum is payable on the net tax liability discharged through the electronic cash ledger. These charges can increase compliance costs..

5. Avoid Penalties with Expert Compliance Support

Managing recurring tax obligations while setting up or scaling an enterprise in India requires procedural accuracy. An end-to-end compliance partner can help keep internal accounts, statutory returns and vendor records aligned..

Partner with Alacrity Corporate Solutions

Alacrity Corporate Solutions Pvt. Ltd. provides institutional-grade GST, indirect tax, and corporate compliance services. Led by Founder Pranav Kumar, our experienced team of certified Chartered Accountants (CAs), Company Secretaries (CSs), and corporate tax advisors help international companies, foreign subsidiaries, and emerging domestic businesses establish watertight compliance frameworks.

From automated monthly reconciliations and return filings to handling department notices, audit representation, and refund claims, Alacrity delivers seamless, error-free execution under one roof.

Get in touch with our advisory team:

Founder: Pranav Kumar

Company: Alacrity Corporate Solutions Pvt. Ltd.

Phone: +91 0120 4126564 / +91 97160-50088

Email: services@alacritycorp.com

Website: www.alacritycorp.com

LinkedIn: Alacrity Corporate Solutions on LinkedIn

Disclaimer: This article is for general information only and is not legal or tax advice. GST requirements may change and depend on the facts; verify current provisions and seek professional advice before acting.