01
Monthly GSTR-1 Filing
Step-by-step tasks for filing outward supply details by the 11th of every month. Covers B2B invoices, B2C large/small, credit and debit notes, and the QRMP quarterly option (due 13th).
Free GST Return Filing Checklist for Indian Businesses (FY 2025-26)
Every GSTR-1, GSTR-3B, and GSTR-9 deadline, reconciliation step, e-invoice rule, and e-way bill requirement in one 10-page PDF. Plus the 8 filing mistakes that cost businesses late fees every single month.
- 45+ checklist items covering monthly, quarterly, and annual GST filing tasks with exact due dates
- E-invoice and e-way bill compliance sections with current turnover thresholds and CBIC references
- 8 common GST filing mistakes that trigger late fees, interest, and ITC loss, with fixes for each
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Petpooja presents
GST Return Filing Checklist
For Indian Businesses
45+
Checklist items · 10-page PDF
FY 2025-26
What's Inside
Six sections covering every GST filing task and deadline.
02
Monthly GSTR-3B Filing
Summary return tasks due by the 20th. ITC claims, output tax liability, reverse charge entries, and the critical GSTR-2B reconciliation you need to complete before hitting "File."
03
Monthly GST Reconciliation
Match your GSTR-1 with sales register, GSTR-3B with purchase register, and GSTR-2B with your books. Catch mismatches before the department catches them for you.
04
E-Invoice Compliance
Mandatory for businesses with turnover above ₹5 crore. IRN generation on the IRP, QR code requirements, cancellation rules within 24 hours, and common rejection reasons.
05
E-Way Bill Compliance
Required for goods movement above ₹50,000. Bill generation before dispatch, Part-A and Part-B requirements, validity periods based on distance, and extension rules.
06
Annual Return + Filing Mistakes
GSTR-9 annual return tasks (due 31 December), reconciliation with audited financials, and the 8 most common GST filing mistakes that trigger late fees and ITC reversals.
Why This Matters
Why GST Filing Compliance Matters for Every Indian Business
GST penalties don't wait for big mistakes. Miss GSTR-3B by one day and you owe ₹50 per day (₹25 CGST + ₹25 SGST). For a nil return, it's ₹20 per day. These are automatic charges under Section 47 of the CGST Act, 2017. No warnings, no grace period.
Then there's interest. Under Section 50 of the CGST Act, delayed tax payment attracts 18% interest per annum from the due date. If you've wrongly claimed Input Tax Credit, that rate goes up to 24%. These numbers compound fast, especially for businesses filing monthly.
The real problem isn't that GST is complicated. It's that there are too many moving parts. GSTR-1 is due on the 11th. GSTR-3B on the 20th. QRMP filers have different dates. E-invoices need IRN generation within 24 hours of the invoice date for some businesses. E-way bills expire based on distance. And GSTR-9 requires reconciliation against your audited books by 31 December.
Most business owners we talk to don't miss deadlines because they're careless. They miss them because nobody wrote it all down in one place. Your CA handles some parts. Your accountant handles others. The GST portal sends notifications that get buried in email.
This checklist puts every GST filing task, from monthly GSTR-1 to annual GSTR-9, into a single reference document. Every deadline, every form, every reconciliation step. It's built for Indian businesses: restaurants, retail stores, manufacturers, distributors, service providers. If you have a GSTIN, this applies to you.
Businesses using Petpooja Invoice generate GST-compliant invoices, e-invoices, and e-way bills directly from their billing system, which cuts reconciliation time significantly. But whether you use billing software or file manually, this checklist keeps you on track.
Sample Preview
5 items from the checklist.
Here's a preview of what you'll find inside:
GSTR-1, Task 3: Upload all B2B invoices with correct GSTINs. Verify each GSTIN on the GST portal search before filing. Incorrect GSTINs cause ITC mismatch for your buyers.
GSTR-3B, Task 2: Reconcile ITC claims against GSTR-2B auto-populated data before filing. Any ITC claimed beyond GSTR-2B is flagged by the system and may be reversed.
Reconciliation, Task 4: Cross-check GSTR-1 outward supplies total against your sales register and accounting books. Discrepancies above ₹500 should be investigated and corrected before the next filing cycle.
E-Invoice, Task 1: Generate Invoice Reference Number (IRN) on the Invoice Registration Portal (IRP) within 24 hours of invoice date. Mandatory for aggregate turnover exceeding ₹5 crore (CBIC Notification 10/2023).
E-Way Bill, Task 3: Generate Part-A of e-way bill before goods dispatch for consignment value above ₹50,000. Ensure transporter ID or vehicle number is updated in Part-B before movement begins.
... and 40+ more tasks across monthly, quarterly, and annual GST filing checklists in the full PDF.
Key Stats
The cost of getting GST filing wrong.
₹50/day
Late fee for missing GSTR-3B or GSTR-1 deadline: ₹25 CGST + ₹25 SGST per day of delay. For nil returns, it's ₹10 + ₹10 per day.
Source: CGST Act, 2017, Section 4718%/year
Interest charged per annum on delayed GST payment from the due date. Wrongly claimed ITC attracts 24% interest under Section 50(3).
Source: CGST Act, 2017, Section 50₹5 Crthreshold
Aggregate turnover threshold for mandatory e-invoicing. Businesses above ₹5 crore must generate IRN on the IRP for every B2B invoice.
Source: CBIC Notification No. 10/2023-Central Tax, dated 10-05-2023
Common Mistakes
8 GST filing mistakes that cost you money.
01
Filing GSTR-3B without reconciling GSTR-2B first
If you claim ITC that doesn't appear in your auto-populated GSTR-2B, the system flags it. Excess claims get reversed with interest under Section 50(3) at 24%. Always match before you file.
02
Missing the GSTR-1 deadline and breaking your buyers' ITC
Your GSTR-1 feeds into your buyer's GSTR-2B. File late, and your buyer can't claim ITC on time. This strains business relationships. Regular taxpayers must file by the 11th. QRMP filers by the 13th.
03
Applying the wrong GST rate or HSN code
India has multiple GST slabs: 5%, 12%, 18%, 28%. A restaurant charging 5% without ITC can't suddenly claim input credits. Wrong HSN codes trigger notices during assessment. Verify rates on cbic-gst.gov.in before invoicing.
04
Not generating e-invoices when turnover crosses ₹5 crore
E-invoicing is mandatory from the financial year your aggregate turnover exceeds ₹5 crore. B2B invoices without a valid IRN are treated as non-compliant. Your buyer loses ITC, and you face penalties.
05
Forgetting to generate e-way bills for goods above ₹50,000
Goods in transit without a valid e-way bill can be detained under Section 129 of the CGST Act. The penalty is equal to the tax amount or ₹25,000, whichever is higher. Part-B must be filled before movement starts.
06
Claiming ITC on blocked items under Section 17(5)
Motor vehicles, food and beverages for staff, club memberships, personal expenses: ITC on these is blocked under Section 17(5) of the CGST Act. Claiming it anyway leads to reversal plus 24% interest.
07
Ignoring GSTR-1 vs sales register mismatch
If your GSTR-1 total doesn't match your books, the department will notice during annual assessment. This is the most common trigger for Section 73/74 demand notices. Reconcile monthly, not annually.
08
Filing GSTR-9 without reconciling against audited financials
GSTR-9 is due by 31 December. Filing it as a copy-paste of your monthly returns without matching against audited P&L and balance sheet creates discrepancies that invite scrutiny. The checklist includes a pre-filing reconciliation workflow.
Comparison
Manual GST filing vs this checklist.
| Aspect | Without a Checklist | With This Checklist |
|---|---|---|
| GSTR-1 filing | Invoices uploaded last minute, GSTINs unchecked | Step-by-step task list ensures B2B, B2C, and credit notes are verified before the 11th |
| GSTR-3B accuracy | ITC claimed without GSTR-2B reconciliation | Mandatory reconciliation step before filing, catches mismatches early |
| E-invoice compliance | IRN generation missed or delayed, invoices rejected | Clear threshold checks and 24-hour generation reminders |
| E-way bill compliance | Bills generated after dispatch, risking detention | Pre-dispatch checklist with Part-A and Part-B verification |
| Monthly reconciliation | Done once a year (or never), mismatches pile up | Monthly reconciliation workflow catches errors in real time |
| Annual return (GSTR-9) | December scramble with mismatched data | Quarter-wise preparation tasks, filed accurately by 31 December |
| Late fee exposure | ₹50/day per return, 18% interest on delayed payment | Zero: every deadline tracked with advance preparation steps |
Stop paying late fees on GST returns.
Download the free checklist and file on time, every time.
FAQ
Frequently asked questions.
Does this checklist cover the QRMP scheme for small businesses?
Yes. The checklist includes separate deadlines for QRMP (Quarterly Return Monthly Payment) filers. GSTR-1 for QRMP is due by the 13th of the month following the quarter, and PMT-06 challan payments are due by the 25th of each month within the quarter. Both are covered.
What's the late fee for missing a GSTR-3B deadline?
Under Section 47 of the CGST Act, 2017, the late fee is ₹25 per day under CGST + ₹25 per day under SGST (total ₹50/day). For nil returns, it's ₹10 + ₹10 per day. On top of this, 18% annual interest applies on the unpaid tax amount from the due date under Section 50.
Is e-invoicing mandatory for my business?
If your aggregate turnover in any financial year from 2017-18 onward exceeded ₹5 crore, e-invoicing is mandatory for all B2B invoices. This was lowered from ₹10 crore to ₹5 crore via CBIC Notification No. 10/2023-Central Tax. The checklist includes a threshold check and step-by-step IRN generation tasks.
Can composition scheme taxpayers use this checklist?
The checklist primarily covers regular taxpayers (GSTR-1 and GSTR-3B). It includes a GST Return Types reference section that outlines composition scheme returns (CMP-08 quarterly and GSTR-4 annual), but the detailed monthly tasks are for regular filers.
When is the GSTR-9 annual return due?
GSTR-9 is due by 31 December of the following financial year. For FY 2025-26, the deadline is 31 December 2026. The checklist includes a quarter-wise preparation workflow so you're not reconciling 12 months of data in the last week of December.
About Petpooja
Petpooja is India's leading SME business software suite, trusted by 1,50,000+ businesses across restaurants, retail, healthcare, manufacturing, and more. From billing and payroll to task management and procurement, Petpooja helps Indian businesses run better, every day.
Automate GST billing and e-invoicing with Petpooja Invoice
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