What is a GST return and who needs to file it?

A GST return is a periodic document filed by every registered taxpayer under the CGST Act, 2017, declaring sales, purchases, ITC claimed, and net tax liability. Every person with GST registration must file, including Nil returns for zero-transaction periods. Specific forms depend on taxpayer category: regular file GSTR-1/3B, composition file CMP-08/GSTR-4.

What is the difference between GSTR-1 and GSTR-3B?

GSTR-1 under Section 37 reports all outward supplies with invoice-level B2B data, HSN summary, and export details - it is a reporting return with no tax payment. GSTR-3B under Section 39 is a summary return where total liability is declared, ITC claimed, and net tax paid. GSTR-1 data auto-populates buyers' GSTR-2B for ITC verification.

What is the penalty for late filing?

Late fee of Rs 50/day CGST + Rs 50/day SGST (Rs 100/day total) under Section 47, capped at Rs 5,000 per Act (Rs 10,000 total) per return. Nil returns: Rs 10/day per Act, capped at Rs 500. Additionally, interest at 18% per annum under Section 50 applies on any unpaid tax. The portal blocks subsequent filings until pending returns are cleared.

What is the QRMP scheme?

The Quarterly Return Monthly Payment scheme allows taxpayers with turnover up to Rs 5 crore to file GSTR-1 and GSTR-3B quarterly instead of monthly. Tax must still be paid monthly via PMT-06 by the 25th. The Invoice Furnishing Facility (IFF) lets you upload B2B invoices in non-filing months so buyers can claim ITC without waiting.

Can I file a GST return after 3 years?

From January 2026, no. The GST portal prevents filing returns more than 3 years past the due date. They become permanently unfiled. Audit all pending returns immediately and file any approaching the 3-year window before they become time-barred.

What happens if I do not file?

Non-filing triggers daily late fees, 18% interest on unpaid tax, blocking of subsequent filings and e-way bills, ITC denial to buyers, best-judgment assessment under Section 62, suspension and cancellation of registration under Section 29, and demand notices under Section 73 or 74A.

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GST Returns - Types, Due Dates, Late Fees and How to File Online in 2026

Q: How much does a CA charge?

Fees vary from Rs 1,000 to Rs 5,000/month. At Patron Accounting: monthly GSTR-1 + GSTR-3B from Rs 1,499/month, quarterly QRMP from Rs 2,999/quarter, annual GSTR-9 from Rs 4,999, GSTR-9C from Rs 9,999. Free initial assessment available. Quick Answers What are GST returns? Periodic filings under CGST Act declaring sales, purchases, ITC, and tax. Key returns: GSTR-1 (sales), GSTR-3B (summary + payment), GSTR-9 (annual). GSTR-3B due date? 20th of the following month (monthly). 22nd or 24th for QRMP (state-based). Late fee? Rs 50/day CGST + Rs 50/day SGST (Rs 100/day total), capped at Rs 10,000 per return. 18% interest on unpaid tax. Nil return required? Yes. Mandatory even with zero transactions. Can be filed via SMS.

Reviewed by CA and CS Team, Patron Accounting LLP ICAI & ICSI Registered| 15+ Years Experience| Last Updated: 20 April 2026 Verify Credentials →

Coverage: 13 types of GST returns - GSTR-1, GSTR-3B, GSTR-4, GSTR-5, GSTR-6, GSTR-7, GSTR-8, GSTR-9, GSTR-9C, GSTR-10, GSTR-11, CMP-08, ITC-04

Due Dates: GSTR-1 by 11th | GSTR-3B by 20th of following month. Annual GSTR-9 by 31st December. Quarterly under QRMP scheme.

Late Fee: Section 47: Rs 50/day CGST + Rs 50/day SGST (Rs 100/day total), capped at Rs 10,000 per return. Interest 18% p.a. under Section 50.

Starting Fee: Monthly GSTR-1 + GSTR-3B filing from Rs 1,499/month. 1,200+ GSTINs managed with 99.5% on-time filing rate.

1,200+ GSTINs managed with 99.5% on-time filing rate across manufacturing, trading, IT, and e-commerce

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Hear how teams across industries use Patron to save time, cut costs, & stay in control.

“

Patron manages GST returns for all 8 of our GSTINs across 4 states. 99.5% on-time rate for 3 years running. Monthly GSTR-2B reconciliation catches mismatches before they become notices. Best compliance partner we've had.

Rajesh Kumar

CFO, AutoParts India Pvt Ltd

★★★★★

2 months ago

“

Switched from DIY filing after receiving a scrutiny notice for GSTR-1 vs GSTR-3B mismatch. Patron reconciled 2 years of data, corrected the discrepancies, and now files our returns 3 days before every deadline.

Sneha Gupta

Founder, TechPulse Solutions

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1 month ago

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Had 8 months of pending returns blocking our portal. Patron filed all catch-up returns in 2 weeks, cleared late fees, and restored our e-way bill generation. Business was back to normal within days.

Amit Verma

Partner, Verma Trading Co

★★★★★

3 months ago

“

We're a QRMP taxpayer. Patron handles our quarterly GSTR-1/3B, monthly PMT-06, and IFF uploads for B2B invoices. Our buyers get timely ITC credit. Excellent quarterly compliance management.

Priya Sharma

Director, CraftIndia Exports

★★★★★

4 months ago

“

Patron filed our GSTR-9 and GSTR-9C for Rs 12 crore turnover. The reconciliation with audited accounts was thorough - zero discrepancies flagged by the department. Annual return compliance sorted.

Karan Mehta

CA, Mehta Industries Group

★★★★★

2 months ago

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Expert GST return filing - monthly GSTR-1/3B, quarterly QRMP, annual GSTR-9/9C, ITC reconciliation under the CGST Act, 2017.

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Overview What Is It Who Must File Our Services How to File Documents Challenges Fees Due Dates Benefits All 14 Forms FAQs

GST Returns - Complete Overview

📌 TL;DR - GST Returns Services at a Glance

GST returns are mandatory periodic filings under CGST Act declaring sales, purchases, ITC, and tax paid. Regular taxpayers file GSTR-1 (by 11th) and GSTR-3B (by 20th) monthly, plus GSTR-9 annually by 31st December. Late filing attracts Rs 50/day per Act (Section 47) capped at Rs 5,000, plus 18% interest. Professional filing from Rs 1,499/month.

Parameter	Details
What are GST Returns	Periodic filings declaring sales, purchases, ITC, and tax liability under CGST Act, 2017
Governing Law	Sections 37, 39, 44, 45, 47, 52 of CGST Act, 2017
Key Return Forms	GSTR-1 (sales), GSTR-3B (summary), GSTR-9 (annual), GSTR-4 (composition), CMP-08
Monthly Due Dates	GSTR-1 by 11th, GSTR-3B by 20th of following month
Late Fee (Section 47)	Rs 50/day CGST + Rs 50/day SGST (Rs 100/day), max Rs 10,000 per return
Interest on Late Payment	18% per annum under Section 50 of CGST Act
Patron Fee	Starting Rs 1,499/month for GSTR-1 and GSTR-3B filing

GST returns are periodic filings that every registered taxpayer must submit under the CGST Act, 2017. These declare sales, purchases, ITC claimed, and tax liability. With the GSTN enforcing sequential filing, real-time ledger validations, and a 3-year filing bar from January 2026, timely and accurate filing has become more critical than ever.

India's GST regime mandates 13 different return forms. Regular taxpayers file 25 returns per year. Missing even one deadline triggers cascading penalties - the portal blocks subsequent filings, late fees accumulate at Rs 100/day, and interest accrues at 18% on unpaid tax. Patron Accounting manages 1,200+ GSTINs from offices in Pune, Mumbai, Delhi, and Gurugram.

Content is reviewed quarterly for accuracy.

What Is a GST Return?

A GST return is a periodic document filed by a registered taxpayer under the CGST Act, 2017, declaring outward supplies, inward supplies, input tax credit claimed, and net tax liability for the applicable tax period.

The two primary returns for regular taxpayers are GSTR-1 (outward supplies under Section 37, due by 11th) and GSTR-3B (summary and tax payment under Section 39, due by 20th). The annual return GSTR-9 (under Section 44) consolidates all monthly/quarterly data.

From January 2026, the GST portal bars filing returns more than 3 years past the due date. GSTR-3B hard-locking from July 2025 means auto-populated figures cannot be modified without explanation.

Key Terms for GST Returns:

GSTR-1 - Monthly/quarterly return under Section 37 reporting all outward supplies with invoice-level B2B details. Auto-populates buyers' GSTR-2B for ITC claims.

GSTR-3B - Monthly summary return under Section 39. Declares total liability, claims ITC, pays net tax due. Where actual tax payment happens.

QRMP Scheme - Quarterly Return Monthly Payment for turnover up to Rs 5 crore. Quarterly GSTR-1/3B with monthly PMT-06 tax payment.

3-Year Filing Bar - From January 2026, returns older than 3 years cannot be filed on the portal. Permanently unfiled.

CGST Act 2017 GST Return Filing

Who Must File GST Returns?

Regular Taxpayers: GSTR-1 and GSTR-3B monthly (or quarterly under QRMP), plus GSTR-9 annually. 25 returns per year for monthly filers.
Composition Dealers: CMP-08 quarterly + GSTR-4 annually (5 returns/year). Turnover up to Rs 1.5 crore under Section 10.
E-Commerce Operators: GSTR-8 monthly reporting TCS on platform supplies (Amazon, Flipkart, Swiggy)
TDS Deductors: GSTR-7 monthly for government departments deducting tax under Section 51
Input Service Distributors: GSTR-6 monthly distributing ITC across branches. Mandatory ISD registration from April 2025.
Non-Resident Taxable Persons: GSTR-5 monthly for foreign businesses temporarily operating in India
Cancelled Registrations: GSTR-10 (final return) within 3 months of cancellation

Note: Every registered person must file returns even with zero transactions (Nil return) under Section 39(7).

Our GST Return Filing Services

Service	What We Do
Monthly GSTR-1 and GSTR-3B Filing	Invoice-level sales data upload, ITC reconciliation with GSTR-2B, tax computation, and return submission via DSC or EVC on gst.gov.in
Quarterly QRMP Filing	Quarterly GSTR-1 and GSTR-3B with monthly PMT-06 tax payment and Invoice Furnishing Facility (IFF) support for B2B invoices
Annual Return (GSTR-9 and GSTR-9C)	Consolidation of yearly transactions, reconciliation with books, and self-certified reconciliation statement for turnover above Rs 5 crore
GSTR-2B Reconciliation	Monthly matching of purchase register with auto-populated GSTR-2B to identify ITC mismatches before GSTR-3B filing
Composition Scheme Filing	CMP-08 quarterly payment and GSTR-4 annual return for composition dealers under Section 10
Remediation and Catch-Up Filing	Filing pending returns, resolving cascading blocks, and managing late fee payments for multiple pending periods

Our Process

How to File GST Returns Online

Step-by-step process for filing GSTR-1 and GSTR-3B via the GST portal under Sections 37 and 39 of the CGST Act, 2017.

Step 1

Aggregate Invoices

Collect all sales invoices, purchase bills, credit notes, and debit notes for the tax period. Ensure all e-invoices and e-way bills are accounted for.

All invoices collected E-invoices verified

Data Ready01

Step 2

Reconcile with GSTR-2B

Match your purchase register with the auto-generated GSTR-2B available on the 14th of each month. Identify missing credits and follow up with vendors before filing deadline.

GSTR-2B matched Vendor follow-ups done

ITC Reconciled02

Step 3

Log in to GST Portal

Log in at www.gst.gov.in using GSTIN and password. Navigate to Services > Returns > Returns Dashboard. Select the return period.

Portal accessed Return period selected

Portal Ready03

Step 4

Upload and File GSTR-1

Upload invoice data - B2B invoices, B2C large and small, exports, credit/debit notes, HSN summary, nil-rated supplies. Review and file using DSC or EVC by the 11th.

GSTR-1 uploaded Filed by 11th

GSTR-1 Filed04

Step 5

Complete GSTR-3B

After GSTR-1, navigate to GSTR-3B. System auto-populates liability from GSTR-1 and ITC from GSTR-2B. Validate, adjust for reversals and exempt supplies.

Auto-populated validated Adjustments made

GSTR-3B Ready05

Step 6

Pay Tax and Submit GSTR-3B

Compute net tax after offsetting ITC. Pay via electronic cash ledger (net banking, NEFT, RTGS). Submit and file GSTR-3B using DSC or EVC by the 20th. Download acknowledgement.

Tax paid Filed by 20th

Returns Complete06

Documents Required for GST Return Filing

All sales invoices issued during the period (B2B and B2C)
Purchase invoices from registered and unregistered suppliers
Credit notes and debit notes issued or received
Bank statements showing tax payments
Previous period GSTR-1 and GSTR-3B filed copies
GSTR-2B auto-populated ITC statement (available from 14th)
E-way bill records (if applicable)
HSN-wise summary of outward and inward supplies
RCM liability details for reverse charge supplies
DSC or registered mobile for EVC verification

Common GST Return Filing Challenges

Challenge	Impact	How Patron Accounting Solves It
GSTR-1 vs GSTR-3B Mismatch	Discrepancies trigger scrutiny notices from the department	Run monthly reconciliation before filing. Use GSTR-2B data to cross-verify. File GSTR-1A amendments before GSTR-3B.
ITC Exceeds GSTR-2B	Excess ITC claims lead to demand notices and interest	Reconcile ITC monthly. Reverse excess in next period with interest. Follow up with vendors for missing invoices.
Cascading Filing Blocks	Cannot file current month if previous month is pending	Prioritise clearing oldest pending return. Pay late fees in cash ledger. Engage CA for catch-up filing.
3-Year Filing Bar (Jan 2026)	Returns older than 3 years become permanently unfiled	Audit all pending returns immediately. File any approaching the 3-year window before they become time-barred.

GST Return Filing Fees

Fee Component	Amount
Monthly GSTR-1 and GSTR-3B Filing	Starting from INR 1,499/month
Quarterly QRMP Filing (GSTR-1 + GSTR-3B + PMT-06)	Rs 2,999/quarter
Annual Return GSTR-9	Starting from Rs 4,999
GSTR-9C Reconciliation (Turnover > Rs 5 Cr)	Starting from Rs 9,999
Composition Scheme (CMP-08 + GSTR-4)	Rs 999/quarter
Catch-Up Filing (Pending Returns)	Rs 999/return
GSTR-2B Monthly Reconciliation	Rs 499/month

All fees and charges listed are indicative only and do not constitute a binding offer. Final amounts may vary depending on the volume of work and the complexity involved.

Professional service charges for drafting, filing, and representation are separate from the statutory fees. The exact fee depends on the complexity of the case, disputed amount, and number of hearings required. Contact us for a detailed quote.

Get a free GST Returns consultation - Call +91 945 945 6700 or WhatsApp us. No-obligation assessment.

GST Return Due Dates

Stage	Estimated Timeline
GSTR-1 (Monthly)	11th of next month \| Our turnaround: by 9th
GSTR-1 (Quarterly - QRMP)	13th of month after quarter \| By 11th
GSTR-3B (Monthly)	20th of next month \| By 18th
GSTR-3B (Quarterly - QRMP)	22nd or 24th (state-based) \| By 20th/22nd
CMP-08 (Composition)	18th of month after quarter \| By 15th
GSTR-9 / GSTR-9C (Annual)	31st December \| By 15th December
GSTR-4 (Composition Annual)	30th April \| By 20th April

Critical: The GST portal blocks subsequent return filing until pending returns with late fees are cleared. From January 2026, returns older than 3 years become permanently unfiled. GSTR-3B hard-locking from July 2025 means auto-populated figures require explanation for modification. File 2-3 days before deadlines to avoid last-minute portal issues.

Key Benefits

Benefits of Professional GST Return Filing

Accuracy in Data Entry

Invoice-level verification reduces GSTR-1 vs GSTR-3B mismatches that trigger scrutiny notices from the department

ITC Optimisation

Monthly GSTR-2B reconciliation ensures maximum eligible ITC is claimed without exceeding auto-populated limits

On-Time Filing

Dedicated CA ensures returns are filed 2-3 days before deadline, eliminating late fees under Section 47 and interest under Section 50

Compliance Continuity

No cascading blocks from missed filings - uninterrupted e-way bill generation, ITC flow, and portal access maintained

Penalty Avoidance

Proactive identification and correction of discrepancies before they trigger demand notices under Section 73 or 74A

Why Businesses Trust Patron Accounting

1,200+ GSTINs managed across manufacturing, trading, IT services, and e-commerce. 99.5% on-time filing rate with zero missed deadlines in FY 2025-26. 4.8/5 Google rating from 200+ verified reviews. Offices in Pune, Mumbai, Delhi, and Gurugram serving clients across all 28 states.

Complete List of GST Return Forms

Form	Filed By	Frequency	Section
GSTR-1	Regular taxpayers	Monthly (11th) / Quarterly (13th)	Section 37
GSTR-1A	Regular (amendments)	After GSTR-1, before GSTR-3B	Section 37
GSTR-3B	Regular taxpayers	Monthly (20th) / Quarterly	Section 39
GSTR-4	Composition dealers	Annually (30th April)	Section 44
GSTR-5	Non-resident taxable persons	Monthly (20th)	Section 45
GSTR-6	Input Service Distributors	Monthly (13th)	Section 39
GSTR-7	TDS deductors	Monthly (10th)	Section 51
GSTR-8	E-commerce operators (TCS)	Monthly (10th)	Section 52
GSTR-9	Regular (> Rs 2 Cr)	Annually (31st Dec)	Section 44
GSTR-9C	Turnover > Rs 5 Cr	Annually (31st Dec)	Section 44
GSTR-10	Cancelled registrations	Within 3 months	Section 45
CMP-08	Composition dealers	Quarterly (18th)	Rule 62

Related GST and Compliance Services

GST Registration - For new businesses requiring GSTIN
GST Notice - Expert reply assistance for scrutiny and demand notices
GST Cancellation - Voluntary cancellation or revocation
GST Annual Return - Dedicated GSTR-9 and GSTR-9C service
Bookkeeping Services - Accurate books for error-free returns

Legal Framework - Late Fees and Penalties

Provision	Details
Section 47 - Late Fee	Rs 50/day CGST + Rs 50/day SGST (Rs 100/day total), capped at Rs 5,000 per Act (Rs 10,000 total). Nil returns: Rs 10/day per Act, capped at Rs 500.
Section 50 - Interest	18% per annum on net tax liability from due date to actual payment date. Calculated daily.
GSTR-9 Late Fee	Rs 100/day (Rs 50 CGST + Rs 50 SGST) or 0.25% of turnover in state, whichever is higher.
3-Year Filing Bar (Jan 2026)	GST portal prevents filing returns more than 3 years past due date. Returns become permanently unfiled.
Section 122 - Penalty	10% of tax due or Rs 10,000 whichever is higher. Fraud: up to 100% of tax due.

Madras HC Ruling (2026): No double penalty for same delay - department cannot impose both Section 47 late fee and Section 125 general penalty simultaneously.

Portal: GST Portal | CBIC

Frequently Asked Questions - GST Returns

Expert answers about GST return types, due dates, late fees, QRMP scheme, and the 2026 filing changes.

Quick Answers

What are GST returns? Periodic filings under CGST Act declaring sales, purchases, ITC, and tax. Key returns: GSTR-1 (sales), GSTR-3B (summary + payment), GSTR-9 (annual).

GSTR-3B due date? 20th of the following month (monthly). 22nd or 24th for QRMP (state-based).

Late fee? Rs 50/day CGST + Rs 50/day SGST (Rs 100/day total), capped at Rs 10,000 per return. 18% interest on unpaid tax.

Nil return required? Yes. Mandatory even with zero transactions. Can be filed via SMS.

File Your GST Returns Before the Deadline

From January 2026, GST returns older than 3 years can no longer be filed. If you have pending returns from FY 2022-23 or earlier, they are approaching the permanent filing bar. Every day of delay compounds late fees (Rs 100/day) and interest (18% p.a.). The portal blocks subsequent filings until pending returns are cleared.

Act now. Call +91 945 945 6700 or WhatsApp us for a free GST compliance assessment.

Never Miss a GST Deadline Again

GST return filing is the backbone of GST compliance. With 13 return forms, monthly deadlines, and the GSTN's sophisticated data matching, accuracy and timeliness are non-negotiable. The 2026 changes - 3-year filing bar, GSTR-3B hard-locking, and turnover-based late fee slabs - have further raised the compliance bar.

Patron Accounting manages 1,200+ GSTINs with a 99.5% on-time rate. Monthly GSTR-1/3B filing from Rs 1,499. Offices in Pune, Mumbai, Delhi, and Gurugram serving businesses across India.

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Content Created: March 2026 | Last Updated: 20 April 2026 | Next Review: April 2026 | Reviewed By: CA & CS Team, Patron Accounting LLP

This page is reviewed monthly - aligned to GST Council meetings, CBIC notifications, due date extensions, portal changes, and late fee waiver schemes. Next review: April 2026.

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