GSTR-9 & GSTR-9C Reconciliation for FY 2025-26: Checklist, Common Mismatches & Filing Guide
Annual GST reconciliation is an essential compliance exercise for businesses and Chartered Accountants preparing GSTR-9 and GSTR-9C for FY 2025-26. Differences between accounting records, GST returns, tax payments and input tax credit (ITC) can lead to additional liabilities, filing errors and departmental queries.
A structured GSTR-9 and GSTR-9C reconciliation process helps identify these differences before submitting the annual return. This guide explains the applicable forms, common mismatches, reconciliation checklist and steps to prepare accurate annual GST filings.
What Are GSTR-9 and GSTR-9C?
GSTR-9 is the annual GST return that consolidates information reported during the financial year, including outward supplies, inward supplies, ITC and taxes paid.
GSTR-9C is a self-certified reconciliation statement that compares the figures declared in GSTR-9 with the taxpayer's audited annual financial statements, where applicable.
The main difference is their purpose: GSTR-9 summarises annual GST compliance, while GSTR-9C explains differences between the annual return and financial records.
Who Needs to File GSTR-9 and GSTR-9C for FY 2025-26?
Under the existing GST framework:
- GSTR-9: Generally applicable to regular taxpayers, subject to exemptions. Registered persons with aggregate turnover up to ₹2 crore have been exempted under the applicable annual-return framework.
- GSTR-9C: Required when aggregate turnover exceeds ₹5 crore during the financial year, subject to applicable exemptions and provisions.
- Due date: The standard deadline for FY 2025-26 is 31 December 2026, unless extended by notification.
Aggregate turnover is determined on an all-India PAN basis, while returns are generally filed separately for each applicable GSTIN.
Taxpayers should verify the latest notifications and FY-specific GST portal instructions before filing.
GSTR-9 and GSTR-9C Reconciliation Checklist for FY 2025-26
Before preparing the annual return, Chartered Accountants and businesses should complete the following checks.
1. Reconcile Turnover with Books of Accounts
Compare annual sales recorded in the books with turnover declared in GSTR-1, GSTR-3B and GSTR-9.
Check for:
- Missing or duplicated sales invoices.
- Credit notes and debit notes.
- Advances and their subsequent adjustments.
- Exempt, nil-rated and zero-rated supplies.
- Financial-year-end adjustments and unbilled revenue.
Not every difference represents an error. Timing differences and accounting adjustments may require separate explanations in GSTR-9C.
2. Verify Input Tax Credit (ITC)
Match the purchase register with GSTR-2B and the ITC claimed in GSTR-3B.
Review eligible and ineligible credits, reversals, reclaim entries and invoices reported by suppliers in different tax periods.
Also examine credits relating to FY 2025-26 that were claimed in the following financial year within the applicable statutory time limit.
For a detailed explanation of monthly matching, read GST Reconciliation: GSTR-1, GSTR-3B, 2A and 2B.
3. Match Tax Liability and Payments
Compare tax liabilities reported in GSTR-1 and GSTR-3B with the annual books and electronic ledgers.
Verify differences in CGST, SGST, IGST and cess, including reverse charge liabilities and payments.
Any additional tax liability identified during reconciliation should be examined and discharged through the appropriate statutory procedure, where required.
4. Review Adjustments and Supporting Documents
Check amendments, credit notes, debit notes, export records, reverse charge transactions and other year-end adjustments.
Maintain a reconciliation working paper explaining each material difference and its treatment in the annual return.
Common GSTR-9 and GSTR-9C Mismatches
Even businesses filing GST returns regularly may discover discrepancies during annual reconciliation.
| Common mismatch |
Possible reason |
Recommended action |
| Turnover in books differs from GSTR-9 |
Unreported invoices, credit notes or timing differences |
Reconcile invoice-wise and document adjustments |
| GSTR-1 differs from GSTR-3B |
Incorrect reporting or missed tax liability |
Verify period-wise taxable value and tax |
| ITC differs from GSTR-2B |
Missing supplier invoices or incorrect credit claims |
Match purchase records and review eligibility |
| Tax paid differs from calculated liability |
Wrong tax head, adjustments or unpaid liability |
Reconcile tax ledgers and payments |
| Financial statements differ from GSTR-9 |
Accounting adjustments or GSTIN-wise allocation differences |
Identify and explain differences in GSTR-9C |
A reconciliation difference does not automatically mean additional tax is payable. Each mismatch must be investigated to determine whether it results from timing, classification, reporting errors or an actual tax shortfall.
How to File GSTR-9 and GSTR-9C for FY 2025-26
Once the reconciliation process is complete, follow these steps.
Step 1: Complete pending GST returns
Ensure all applicable GSTR-1 and GSTR-3B returns for the financial year have been filed.
Step 2: Download annual GST records
Log in to the GST portal and download the available annual return data, GSTR-1 and GSTR-3B summaries and relevant ITC information.
Step 3: Prepare GSTR-9
Review the auto-populated figures and enter the required annual information according to the applicable table instructions.
Step 4: Reconcile financial statements with GSTR-9
If GSTR-9C applies, compare annual turnover, taxable turnover, tax paid and ITC with the audited financial statements and supporting records.
Step 5: Explain reconciliation differences
Record the reasons for differences in the relevant GSTR-9C tables. Determine whether additional tax payment or other compliance action is necessary.
Step 6: Validate and submit
Review the completed forms before submission. File GSTR-9 first, followed by GSTR-9C where applicable, using the prescribed portal procedure.
Important: GSTR-9 cannot ordinarily be revised after filing. Final validation is therefore essential.
How GST Filing Software Helps with Annual Reconciliation
Manual annual GST reconciliation can become difficult when businesses manage thousands of invoices, multiple GST registrations and frequent amendments.
Using CompuTax GST Filing Software (CompuGst), businesses and tax professionals can streamline important reconciliation activities through:
- Importing data from accounting software and Excel.
- Comparing invoice information with available GST return data.
- Identifying mismatches and potential ITC differences.
- Validating information before return submission.
- Managing multiple GSTINs and tracking filing status.
These capabilities help reduce repetitive data entry and make reconciliation reviews more organised.
Taxpayers should still verify the final figures and applicable legal requirements before submitting their returns.
Best Practices for Error-Free Annual GST Filing
Start reconciliation before the filing deadline rather than waiting until December.
Maintain separate working papers for turnover, ITC, tax liability and reconciliation adjustments. Investigate unresolved differences and preserve supporting documents.
For CA firms managing multiple clients, a standardised reconciliation checklist and centralised filing workflow can help reduce missed items and last-minute corrections.
Frequently Asked Questions
1. Is GSTR-9C mandatory for FY 2025-26?
Under the existing framework, GSTR-9C applies to eligible registered persons whose aggregate turnover exceeds ₹5 crore during the financial year. Check the latest notifications for any changes or exemptions.
2. What is the difference between GSTR-9 and GSTR-9C?
GSTR-9 is the annual GST return. GSTR-9C is a reconciliation statement comparing figures reported in the annual return with the applicable audited financial statements.
3. What is the due date for GSTR-9 and GSTR-9C for FY 2025-26?
The standard due date is 31 December 2026, subject to any extension notified by the government.
4. Can GSTR-9 be revised after filing?
No. GSTR-9 generally cannot be revised once filed, making reconciliation and pre-submission verification important.
5. How can businesses reduce GSTR-9C reconciliation errors?
Businesses should regularly match sales, purchase records, ITC, GST returns and tax payments. Reconciliation software can help identify differences, but final review remains necessary.
Conclusion
Accurate GSTR-9 and GSTR-9C reconciliation for FY 2025-26 requires more than compiling annual GST figures. Businesses and tax professionals must verify turnover, match ITC, reconcile tax payments and properly explain differences between accounting records and GST returns.
Completing these checks before filing helps reduce errors, identify compliance risks and avoid unnecessary last-minute corrections.
Simplify your GST reconciliation process with CompuTax GST Filing Software. Explore CompuGst to manage GST data, identify mismatches and streamline return preparation.
Disclaimer: This article is intended for general informational purposes. Tax laws, forms, utilities and due dates may change through notifications or amendments. Taxpayers should verify the latest official guidance and obtain professional advice based on their facts.