Important things to do before filing GSTR-9 & 9C for FY 2024-25

For most businesses, GSTR-9 & GSTR-9C Filing, the crucial annual return and the reconciliation statement are among the most critical year-end compliance tasks. Unlike monthly returns that deal with periodic reporting, GSTR-9 and 9C require a complete consolidation of transactions, adjustments, and reconciliations for the financial year.

Filing these forms is not a mere compliance ritual. Errors here can lead to loss of Input Tax Credit (ITC), attract penalties, or even trigger audits and disputes. A carefully prepared annual return serves two purposes: it provides transparency to the tax authorities and gives businesses a reality check on how effectively they have managed their GST compliance during the year.

Understanding GSTR-9 and GSTR-9C Filing

GSTR-9 (Annual Return)

GSTR-9 is the GST form that has to be filed yearly through a regular assessee using all the consolidated and combined information pertaining to CGST, SGST, and IGST provided for the year. This yearly summary return consolidates outward supplies, inward supplies, ITC availed, demands, refunds, Interest, late fees, and HSN-wise details, etc. for the full financial year. It must be filed by all regular taxpayers with aggregate turnover above ₹2 crore (certain exemptions apply).

GSTR-9C (Reconciliation Statement):

GSTR-9C is a reconciliation statement that reconciles the figures reported in GSTR-9 with the audited financial statements. Certified by a Chartered Accountant, it is mandatory for taxpayers with turnover above ₹5 crore. It ensures that financial disclosures and GST reporting are aligned. Form GSTR-9C must be self-certified by the taxpayer. 

Due Date:

Typically, 31st December following the end of the financial year (for FY 2024–25, the due date is 31st December 2025 unless extended by notification by GSTN).

If you want to file the GSTR-9 and GSTR-9C forms for the fiscal year 2024-25, the facility is available on GSTrobo from the month of August 2025. You can furnish the form before 31st December 2025, which is the last date.

However, a normal assessee must furnish the significant tasks by the end of October 2025 in order to assure efficient compliance and preciseness. These tasks are mentioned below that must be kept in mind before furnishing GSTR-9 and GSTR-9C.

Annual GST adjustment for the fiscal year 2024-25

The registered taxpayers need to furnish GST returns on a monthly and quarterly basis. And after the fiscal year is closed, the annual returns must be filed before the 31st of December of the coming fiscal year. It will need the taxpayer to compile the information reported or collected during the financial year.

To prevent duplications and declarations furnished, the assessee must sort the information and consolidate the values. If you are a taxpayer, you must not miss the yearly GST adjustment for FY 2024-25. It is also a good idea to use GST tax software to ease the process of filing the forms.

Key Considerations Before Filing

1. Reconciliation Across Returns and Books

The cornerstone of GSTR-9 and 9C filing is data accuracy. Businesses should reconcile:

• GSTR-1 vs GSTR-3B vs Books of Accounts: Ensure outward supplies match across all records.
• GSTR-2B vs ITC claimed in GSTR-3B: Cross-check input credits; mismatches here can result in ITC reversals or disputes.
• Debit/Credit Notes: Confirm whether these are properly reflected and adjusted in returns.

Common pitfalls include invoices missed in GSTR-1, ITC availed on ineligible credits, and timing differences between reporting and actual transactions.

2. Rectify Errors and Report Missed Invoices

Before GSTR-9 and GSTR-9C filing for FY 2024–25, taxpayers must rectify errors and capture missed invoices or credit/debit notes. A key point to note is that neither GSTR-9 nor GSTR-9C can be revised. Only additional liabilities can be discharged through GSTR-9, while reconciliation is handled through GSTR-9C.

Amendments that typically arise include:

• B2B amendments
• Credit/Debit Notes (Registered) amendments
• B2C (Large) amendments
• Credit/Debit Notes (Unregistered) amendments
• Export invoice amendments

Failing to address these before annual filing can permanently block ITC or misstate liabilities.

3. Vendor Verification and Its Impact on ITC & Liability

Another crucial step is ensuring vendor-side accuracy, as mismatches here directly impact your ITC eligibility and liability position.

• Scenario 1: Vendor declares the liability but does not avail ITC in their GST returns. These credits must be availed before the due date of annual returns or September returns (whichever is earlier).
• Scenario 2: Vendor does not declare liability on supplies, but your business has already availed ITC. In such cases, coordinate with the vendor to ensure liability is declared, otherwise the ITC may be disallowed.
• Scenario 3: Mismatches exist between ITC availed and the liability declared by the vendor. These differences must be investigated and reconciled, often through the issuance of credit or debit notes before filing the annual return.

Businesses must cross-check documents with vendors and ensure any missed-out ITC or adjustments are reported in FY 2024–25 itself. Deferring reconciliation risks permanent credit loss and potential disputes.

4. ITC Validation and Reversals

• Review blocked credits under Section 17(5) (e.g., motor vehicles, employee-related expenses).
• Ensure ITC reversals for non-payment to vendors within 180 days.
• Check ITC apportionment between taxable and exempt supplies (Rules 42 and 43).
• Late ITC claimed in subsequent years should not be overstated in the current year’s annual return.

5. Turnover Classification & Supply Disclosure

• Correctly classify outward supplies into taxable, zero-rated (exports/SEZ), exempt, and nil-rated.
• Disclose non-GST outward supplies (e.g., petrol, alcohol) to avoid under-reporting.
• Provide accurate HSN-wise summaries, especially if turnover exceeds prescribed thresholds.

6. Demand, Refund, and Litigation Adjustments

• Report demands paid voluntarily or through DRC-03.
• Reconcile refunds applied, sanctioned, rejected, or pending.
• Disclose ongoing litigations where liability is under dispute; under-reporting here may create future risks.

7. Audit Considerations in GSTR-9C

• Match audited financial statements with GST returns.
• Adjust for items like unbilled revenue, advances, and reverse charge liabilities.
• Document reasons for differences, if any, between audited accounts and GST returns.
• Ensure the auditor’s certification is backed by clear explanations—unexplained variances are red flags.

8. Penalties, Late Fees, and Interest Exposure

• Late Fee: For GSTR-9, it is ₹200 per day (₹100 CGST + ₹100 SGST) subject to a maximum of 0.25% of turnover.
• Interest: Any under-reported liability attracts 18% interest from the due date of payment.
• Incorrect disclosures in GSTR-9C may lead to audit notices or penalties under Section 122 of the CGST Act.

Practical Tips for Smooth Filing

• Start Early: Do not wait for the December deadline. Begin reconciliations well in advance.

• Leverage Technology: Automation tools can quickly highlight mismatches between books and GST returns.

• Vendor Communication: Resolve ITC-related issues with vendors before filing.

• Maintain Documentation: Keep all workings, reconciliations, and explanations ready for future audits.

• Cross-Team Collaboration: Tax, finance, and audit teams should work together to eliminate blind spots.

Common Mistakes to Avoid

• Treating GSTR-9 as a simple replication of GSTR-3B.
• Ignoring minor mismatches assuming they won’t attract scrutiny.
• Not reporting exempt and non-GST outward supplies.
• Failing to reverse ineligible ITC in annual filings.
• Overlooking amendments and corrections done during the year.

Technology, Support & Compliance Punctuality

Given the volume of reconciliations and documentation involved, manual efforts can often lead to oversight. This is where GST return filing software such as GSTrobo^® can help taxpayers streamline reconciliations, track vendor mismatches, and save time.

Taxpayers must also confirm missing credentials with suppliers or vendors before their GSTR-1 filing. If not, they risk losing ITC for the fiscal year and being unable to claim it in subsequent GSTR-3B filings.

It is equally important to understand the difference between GSTR-9 and GSTR-9C:

• GSTR-9 consolidates reported numbers for the financial year.
• GSTR-9C reconciles those numbers with audited financial statements, highlighting unsettled ITC, sales, and tax liabilities. Any pending dues, even after September returns are filed, must be discharged using GST DRC-03.

To ensure accurate and timely filing, businesses may require the support of Chartered Accountants and technology-driven GST compliance platforms. Leveraging tools like GSTrobo® not only reduces compliance stress but also builds confidence that filings are robust, punctual, and audit-ready.

Conclusion

Filing GSTR-9 and GSTR-9C is not just about meeting a statutory deadline; it is an opportunity to validate the integrity of your GST compliance framework. A well-prepared annual return protects working capital, reduces exposure to litigation, and builds credibility with regulators.

Businesses that invest in early reconciliations, technology-led validation, vendor coordination, and structured review processes stand to save significant time, money, and effort. As GST compliance matures in India, these annual filings will increasingly be viewed as indicators of corporate governance and financial discipline.