GSTR-3B Filing Guide - CleverCoins

GSTR-3B Filing Guide 2025-26

Everything You Need to Know

GSTR-3B is a monthly self-declaration return that every GST-registered taxpayer (other than composition dealers) must file. It is one of the most important GST returns — it captures your outward supplies, inward supplies, ITC claims, and tax liability for the month. Filing GSTR-3B correctly and on time is not just a legal obligation — it directly affects your ITC claims, cash flow, and GST compliance rating.

This complete GSTR-3B filing guide for 2025-26 covers everything — who must file it, due dates, table-by-table breakdown, how to file it step by step, interest and penalty provisions, and the latest changes effective for FY 2025-26.

NOTE

GSTR-3B is a summary return. Unlike GSTR-1 which captures invoice-level details, GSTR-3B only requires consolidated figures. However, it must still match with your GSTR-1 and GSTR-2B data.

What Is GSTR-3B?

GSTR-3B (Government STatement of Return – 3B) is a monthly simplified summary return introduced by the GST Council. It was originally a temporary measure when GST was launched in July 2017, but has since become a permanent part of the GST compliance framework.

It is used to declare:

Total outward taxable supplies (sales)
Zero-rated and exempt supplies
Inward supplies liable to reverse charge
Input Tax Credit (ITC) available and utilized
Net tax liability (CGST, SGST, IGST, Cess) payable or adjusted

Who Must File GSTR-3B?

GSTR-3B must be filed by all regular GST-registered taxpayers. The following categories are EXEMPT from filing GSTR-3B:

Composition Scheme taxpayers (they file GSTR-4)
Input Service Distributors (they file GSTR-6)
Non-resident taxable persons (they file GSTR-5)
Online Information Database Access and Retrieval (OIDAR) service providers

GSTR-3B Due Dates for 2025-26

Category of Taxpayer	Filing Frequency	Due Date
Regular taxpayers (Monthly filers)	Monthly	20th of the following month
Taxpayers with turnover up to Rs.5 Cr (Category A States)	Quarterly (QRMP)	22nd of month after quarter end
Taxpayers with turnover up to Rs.5 Cr (Category B States)	Quarterly (QRMP)	24th of month after quarter end
Nil return filers	Monthly / Quarterly	Same as above – file NIL return

WARN

Late filing of GSTR-3B attracts a late fee of Rs. 50 per day (Rs. 25 CGST + Rs. 25 SGST) for returns with tax liability, and Rs. 20 per day for NIL returns. This accrues from the due date until the actual filing date.

GSTR-3B Format – Table-by-Table Breakdown

GSTR-3B consists of 6 main tables. Here is a detailed explanation of each table:

Table 3.1 – Details of Outward Supplies and Inward Supplies liable to Reverse Charge

This is the most critical table. It captures your total sales summary for the period:

Row	What to Enter
3.1(a) Outward taxable supplies (other than zero rated, nil rated, exempted)	Total taxable sales (B2B + B2C) – report taxable value and IGST/CGST/SGST
3.1(b) Outward taxable supplies (zero rated)	Exports and supplies to SEZ with or without payment of IGST
3.1(c) Other outward supplies (nil rated, exempted)	Supplies that attract nil GST or are exempt from GST
3.1(d) Inward supplies (liable to reverse charge)	Purchases where you must pay GST as recipient (RCM transactions)
3.1(e) Non-GST outward supplies	Supplies outside the GST net – e.g., alcohol, petroleum

Table 3.2 – Inter-State Supplies

Break down your taxable outward supplies by state-wise destination. Report separately for registered persons, unregistered persons, and composition dealers. This data feeds into IGST cross-utilization.

Table 4 – Eligible ITC

Table 4 is used to claim Input Tax Credit. It has several sub-sections:

Sub-Table	Description
4(A)(1) Import of Goods	IGST paid on import of goods (from ICEGATE / Bill of Entry)
4(A)(2) Import of Services	IGST paid on import of services from outside India
4(A)(3) Inward supplies from ISD	ITC distributed by Input Service Distributor
4(A)(4) Self-assessed in GSTR-3B (RCM)	ITC on inward supplies under reverse charge
4(A)(5) All other ITC	Credit from domestic B2B purchases (from GSTR-2B)
4(B)(1) As per Rule 38 – Reversal	ITC related to banking/NBFC proportionate reversal
4(B)(2) Others – Reversal	ITC reversed for exempt supplies, personal use, Rule 42/43
4(D)(1) ITC Reclaimed	Previously reversed ITC being reclaimed this period
4(D)(2) Ineligible ITC – Section 17(5)	Report but do not claim – blocked credits

KEY

From FY 2022-23 onwards, ITC can ONLY be claimed to the extent it appears in GSTR-2B. Provisional ITC beyond GSTR-2B is no longer permitted under Rule 36(4).

Table 5 – Values of Exempt, Nil Rated and Non-GST Inward Supplies

Report the value of purchases that are exempt from GST, attract nil rate, or are outside GST scope. This is used for Rule 42 proportionate ITC reversal calculations.

Table 5.1 – Interest and Late Fee Details

Auto-populated by the system based on late filing. You must verify and confirm the interest on delayed tax payment (18% per annum) and the applicable late fee before submitting.

Table 6 – TDS and TCS Credits

Report TDS deducted under Section 51 of CGST Act (for government entities) and TCS collected by e-commerce operators under Section 52. These credits are auto-populated from respective GSTR-7 and GSTR-8 returns filed by the deductors/collectors.

Step-by-Step Process to File GSTR-3B

Log in to GST Portal: Visit www.gst.gov.in and log in with your GSTIN and password.
Navigate to Returns Dashboard: Go to Services > Returns > Returns Dashboard. Select the financial year (2025-26) and the return period (month/quarter).
Download GSTR-2B: Before filling Table 4, download your auto-drafted GSTR-2B statement to verify eligible ITC for the period.
Fill Table 3.1: Enter consolidated outward supply figures from your sales register. Cross-check with GSTR-1 already filed.
Fill Table 3.2: Enter inter-state supply breakup by state for both registered and unregistered recipients.
Fill Table 4: Enter eligible ITC as per GSTR-2B. Report reversals and ineligible credit separately.
Fill Table 5: Enter values of exempt, nil-rated and non-GST inward supplies.
Compute Tax Liability: The system auto-computes your net tax payable after adjusting ITC. Verify the figures in the tax payment section.
Make Tax Payment: Use the Electronic Cash Ledger or Credit Ledger to offset the liability. Pay any balance using NEFT/RTGS/UPI.
Preview and Submit: Click Preview to review all entered data. Click Submit once satisfied.
File with DSC or EVC: File using Digital Signature Certificate (DSC) for companies/LLPs or Electronic Verification Code (EVC) for others.
Download ARN: Upon successful filing, download the Acknowledgement Reference Number (ARN) as proof of filing.

GSTR-3B vs GSTR-1 – Key Differences

Parameter	GSTR-3B vs GSTR-1
Nature	GSTR-3B: Summary return \| GSTR-1: Invoice-level return
Data Level	GSTR-3B: Consolidated totals \| GSTR-1: Invoice-wise details
Tax Payment	GSTR-3B: Tax is paid here \| GSTR-1: No tax payment
Amendment	GSTR-3B: Cannot be amended \| GSTR-1: Can be amended
ITC Impact	GSTR-3B: ITC is claimed here \| GSTR-1: Populates recipient’s GSTR-2B
Filing Sequence	GSTR-3B: Filed after GSTR-1 \| GSTR-1: Filed before GSTR-3B

GSTR-3B Under QRMP Scheme (2025-26)

The Quarterly Return Monthly Payment (QRMP) Scheme is available for taxpayers with turnover up to Rs. 5 crore. Under this scheme:

GSTR-3B is filed quarterly (not monthly)
Tax must still be paid every month using challan PMT-06 (by 25th of each month)
The quarterly GSTR-3B is filed using a simplified format — Opt-I (using IFF data) or Opt-II (based on 35% pre-filled tax from previous quarter)
GSTR-1 can be filed quarterly with optional monthly IFF (Invoice Furnishing Facility) for B2B invoices

Common Errors in GSTR-3B Filing and How to Avoid Them

Common Error	How to Avoid It
Claiming ITC beyond GSTR-2B	Always download GSTR-2B before filling Table 4. Never claim more than what is reflected.
Mismatch between GSTR-1 and GSTR-3B	Reconcile GSTR-1 outward supplies with GSTR-3B Table 3.1 before filing.
Not reversing ITC on 180-day payment rule	Review unpaid invoices older than 180 days monthly and reverse ITC accordingly.
Reporting RCM incorrectly	Report RCM liability in 3.1(d) and simultaneously claim ITC in Table 4(A)(4).
Missing Nil return filing	Even if no business activity, a NIL GSTR-3B must be filed before due date.
Wrong tax head payment	IGST cannot be used for SGST liability. Ensure correct head-wise payment.
Not verifying auto-populated interest	Check Table 5.1 for system-calculated interest and confirm accuracy before submitting.

Important Reconciliations Before Filing GSTR-3B

- GSTR-1 vs GSTR-3B Reconciliation: Outward supply figures in GSTR-3B Table 3.1 must match GSTR-1 taxable values
- GSTR-2B vs GSTR-3B Reconciliation: ITC claimed in Table 4 must not exceed credit reflected in GSTR-2B
- Books vs GSTR-3B Reconciliation: Your sales/purchase register must match the GST return figures
- E-Way Bill vs GSTR-1/GSTR-3B: Ensure e-way bill data is consistent with return data to avoid scrutiny

Key Changes in GSTR-3B for FY 2025-26

Enhanced GSTR-2B matching: System now auto-flags mismatches between GSTR-3B ITC claims and GSTR-2B data
AI-powered scrutiny: GST department uses analytics to detect high ITC claims, sudden turnover spikes, and circular trading
E-invoicing mandatory for all businesses above Rs. 5 crore: This data auto-populates GSTR-1 and flows to GSTR-2B
Stricter blocking of ITC on non-compliant suppliers: If supplier has not filed returns for 2+ consecutive months, ITC is auto-blocked
New IMS (Invoice Management System): Introduced to allow recipients to accept, reject or keep pending incoming invoices before ITC claim

GSTR-3B Filing Checklist for 2025-26

LIST

Before Filing: Download GSTR-2B / Compare GSTR-1 and GSTR-3B figures / Review unpaid invoices older than 180 days / Identify RCM transactions / Check blocked credit under Section 17(5) / Verify exempt and nil-rated supply values / Ensure sufficient balance in Cash Ledger / Check for any pending notices or demands