Our CA team prepares and files GSTR-9 and GSTR-9C for over 120 clients every December. After eight years of annual return filing (FY 2017-18 through FY 2024-25), we have seen the same reconciliation traps, the same ITC mismatches, and the same last-minute panics repeat year after year.
The form has evolved - tables have been added, auto-population has expanded, the audit requirement has shifted from mandatory CA certification to self-certification - but the core challenge remains: reconciling what the portal thinks you owe with what your books actually show, and doing it in a return that cannot be revised after filing.
This blog is our CA team's honest opinion on GSTR-9 and GSTR-9C. Not a table-by-table tutorial (those exist everywhere), but the practitioner insights that come from filing 120+ annual returns every year: what matters most, what the department actually looks at, where businesses make costly mistakes, and what changed in 2026 that makes this year's filing different.
What Are GSTR-9 and GSTR-9C: The CA's Perspective
GSTR-9 is the annual return that consolidates your entire year's GST compliance into one document. It pulls data from your GSTR-1 (outward supplies), GSTR-3B (summary return), and GSTR-2B (ITC), and asks you to reconcile them with your books of accounts. It is divided into 6 parts with 19 tables covering outward supplies, inward supplies, ITC claimed, ITC reversed, tax paid, and other information including HSN summary and stock declaration.
GSTR-9C is the reconciliation statement that compares: (a) turnover as per audited financial statements vs turnover as per GSTR-9, (b) tax payable as per books vs tax paid as per returns, and (c) ITC as per books vs ITC claimed in returns. For FY 2020-21 onwards, GSTR-9C is self-certified by the taxpayer - no longer requiring mandatory CA certification. However, for businesses with turnover above Rs 5 crore, the reconciliation is complex enough that professional preparation remains essential.
From our CA team's perspective: GSTR-9 is not just a summary - it is a permanent, non-revisable declaration of your GST position for the year. Every number you enter becomes the 'truth' as far as the department is concerned. If you over-declare tax liability, you cannot claim refund through GSTR-9 (it is not a refund mechanism). If you under-declare ITC, you cannot add it back (GSTR-9 is not an ITC claiming mechanism). This makes accurate preparation - not just timely filing - the real challenge. Businesses using GST annual return services (know more) get the reconciliation right before submitting.
Key Terms You Should Know
Table 6A (Auto-Populated ITC from GSTR-3B): The total ITC claimed in all GSTR-3B filings during the year. Non-editable. If this number differs from your books, you must explain the difference - not change the table.
Table 8A (Auto-Populated ITC from GSTR-2B): The total ITC available as per GSTR-2B (from supplier filings). Non-editable. This is what the department considers your 'eligible' ITC. Any ITC claimed beyond 8A is flagged.
Table 8D (ITC Lapsed): ITC available in GSTR-2B but not claimed in GSTR-3B during the year. This is permanently lost ITC - the department treats unclaimed ITC as lapsed if not claimed within the prescribed time.
Tables 10-14 (Amendments): These capture supplies and ITC adjustments made in April-September of the next financial year that relate to the reporting year. This is where most reconciliation differences are explained.
Part VI (Other Information): Includes HSN summary (Table 17/18) and stock declaration. The stock declaration must reconcile with the stock audit report and physical inventory records.
Self-Certification (GSTR-9C): From FY 2020-21, GSTR-9C is self-certified by the taxpayer - no mandatory CA signature. But the legal responsibility for accuracy rests with the signatory. Incorrect self-certification can invite scrutiny.
Who Must File GSTR-9 and GSTR-9C?
| Taxpayer Category | GSTR-9 | GSTR-9C | Key Condition |
|---|---|---|---|
| Regular taxpayer (turnover > Rs 5 crore) | Mandatory | Mandatory | Both GSTR-9 and GSTR-9C required |
| Regular taxpayer (turnover Rs 2-5 crore) | Mandatory | Not required | GSTR-9 only; GSTR-9C not applicable below Rs 5 crore |
| Regular taxpayer (turnover ≤ Rs 2 crore) | Optional | Not required | Exempt from GSTR-9 filing; advisable to file for compliance record |
| Composition taxpayer | GSTR-9A (annual) | Not required | Files GSTR-9A instead of GSTR-9; no reconciliation required |
| Casual / non-resident taxable person | Not required | Not required | Exempt from annual return filing |
| Input Service Distributor | Not required | Not required | Exempt from annual return filing |
| Taxpayer whose registration was cancelled during FY | Required (if turnover > Rs 2 crore) | Depends on turnover | Must file for the period during which registration was active |
Our opinion: Even if your turnover is below Rs 2 crore (making GSTR-9 optional), we recommend filing it. A filed annual return creates a clean compliance record, resolves pending ITC issues, and demonstrates good faith if the department ever reviews your account.
Our CA Team's Top Seven Opinions on GSTR-9 and GSTR-9C
Opinion 1: The Non-Revisable Nature of GSTR-9 Is the Biggest Risk
Unlike GSTR-1 (which allows amendments in subsequent months) and GSTR-3B (which allows corrections through DRC-03), GSTR-9 cannot be revised after filing. Period. If you discover an error after filing - an ITC reversal missed in Table 7, a supply wrongly classified in Table 5, or a stock declaration that does not match the actual inventory - there is no mechanism to correct it in GSTR-9. The only options are: explain the discrepancy during an assessment (if the department raises it) or pay additional tax through DRC-03 (for underpayment). This is why our team spends 60-70% of the GSTR-9 preparation time on reconciliation and verification - not on data entry.
Opinion 2: Table 8A vs Table 6A Is Where 90% of ITC Disputes Originate
Table 8A shows ITC available per GSTR-2B (what suppliers filed). Table 6A shows ITC claimed in GSTR-3B (what you claimed). In a perfect world, 6A ≤ 8A. In practice, we see three scenarios: (a) 6A > 8A - you claimed more ITC than appears in GSTR-2B (common when suppliers filed GSTR-1 late; the ITC appeared in a later period's GSTR-2B but was claimed in an earlier GSTR-3B), (b) 8A > 6A - ITC was available but you did not claim it all (ITC lapsed in Table 8D - a permanent loss), (c) 6A = 8A but both differ from books (timing differences in recording purchases). Our team reconciles 8A, 6A, and the purchase register at invoice level before entering any data in GSTR-9. Use GST return filing (know more) services to ensure monthly reconciliation prevents year-end surprises.
Opinion 3: Additional Tax Payment Through GSTR-9 Is a Strategic Decision
Table 9 of GSTR-9 allows the taxpayer to pay additional tax discovered during the annual reconciliation. If your books show higher output liability than what was paid in GSTR-3B, you can pay the difference through Table 9. But this is a strategic decision, not an automatic action. Our team evaluates: (a) is the additional liability genuine or is it a reconciliation artefact? (b) does paying now foreclose a future favourable interpretation? (c) is the amount material enough to attract departmental attention if not paid? We always advise paying genuine additional liabilities - but only after confirming the calculation. Paying an incorrect amount creates a permanent overpayment that is very difficult to recover.
Opinion 4: HSN Summary (Table 17/18) Is the Most Under-Prepared Section
Tables 17 (outward) and 18 (inward) require HSN-wise summary of all supplies. From 2026, 6-digit HSN is mandatory for all taxpayers. Most businesses prepare Tables 4-14 meticulously and rush through 17/18 - entering aggregated HSN data from GSTR-1 without verifying against the books. The problem: if your GSTR-1 HSN data has been incorrect all year (wrong codes, aggregated codes, generic 4-digit instead of specific 6-digit), Table 17 will carry those errors into the annual return. The department now uses HSN data for sectoral analysis and rate verification. A mismatch between the HSN rate and the actual rate charged triggers automated scrutiny. Our team uses the new GSTN HSN Download Tool (introduced for FY 2024-25 onwards) to pull consolidated GSTR-1 HSN data and verify it against the product master before entering Table 17.
Opinion 5: GSTR-9C Reconciliation Is Where the Department Finds the Money
GSTR-9C reconciles three things: turnover (audited books vs GSTR-9), tax (books vs returns), and ITC (books vs returns). In our experience, the reconciliation almost always shows differences - and these differences are what the department scrutinises during assessment. The most common differences: (a) turnover mismatch - income items in P&L that are not GST supplies (dividend, interest, sale of fixed assets), (b) tax mismatch - timing differences between when liability was accounted in books vs when it was paid in GSTR-3B, (c) ITC mismatch - ITC in books (based on purchase register) vs ITC in GSTR-3B (based on GSTR-2B matching). Our team's approach: explain every difference line by line. An unexplained difference in GSTR-9C is an invitation for a Section 73/74 demand. Use GST audit (know more) services for reconciliation-led annual return preparation.
Opinion 6: Self-Certification of GSTR-9C Shifted Risk from CA to Business Owner
Before FY 2020-21, GSTR-9C required CA certification - the CA signed the reconciliation statement taking professional responsibility. From FY 2020-21, it is self-certified by the taxpayer. This shift moved the legal risk from the CA to the business owner. If the self-certified GSTR-9C contains misstatements, the business owner (not a CA) faces the consequences. Our opinion: even though CA certification is no longer mandatory, having a CA prepare and review the GSTR-9C is more important than ever - because the business owner is now personally signing off on the accuracy of a complex reconciliation.
Opinion 7: Filing GSTR-9 Without Filing GSTR-9C Creates a False Sense of Completion
Many businesses with turnover above Rs 5 crore file GSTR-9 by the deadline and then delay GSTR-9C. From 2026, late fee for GSTR-9C is calculated separately from the date after GSTR-9 filing. So if you file GSTR-9 on 25 December but GSTR-9C on 7 January, GSTR-9C attracts 7 days' late fee. The department views incomplete annual compliance (GSTR-9 without GSTR-9C) as a red flag. File both together - or at minimum, within the same week.
The Seven Most Common Reconciliation Differences We Find
| # | Difference | Cause | How We Resolve It |
|---|---|---|---|
| 1 | Turnover in books > GSTR-1 | Invoices raised in books but not reported in GSTR-1 (missed in monthly filing) | Report in Table 10/11 (amendments) if within the April-September next FY window; pay additional tax in Table 9 |
| 2 | Turnover in books < GSTR-1 | Items reported in GSTR-1 that are not revenue in books (advances, credit notes not processed in books) | Reconcile advance adjustments; verify credit notes are booked in same period |
| 3 | ITC in GSTR-3B > ITC in GSTR-2B (6A > 8A) | ITC claimed based on invoice receipt before supplier filed GSTR-1; or provisional ITC claimed (pre-2022 rules) | Identify period-wise excess claims; reverse in Table 12/13 if not yet corrected; pay interest if excess was utilised |
| 4 | ITC in books > ITC in GSTR-3B | ITC recorded in purchase register but not claimed in GSTR-3B (missed or deferred) | If within time limit: claim in next year's GSTR-3B and report in Table 13 of next year's GSTR-9. If beyond time limit: ITC lapsed permanently |
| 5 | RCM liability in books ≠ RCM in GSTR-3B | RCM on rent, legal services, or imports recorded in books but not paid through GSTR-3B | Identify unpaid RCM; pay through DRC-03 with interest; report in Table 9 of GSTR-9 |
| 6 | HSN-wise tax in Table 17 ≠ total tax in Tables 4/5 | HSN summary in GSTR-1 does not reconcile with invoice-level data due to generic HSN codes | Use GSTN HSN Download Tool; correct HSN codes in Table 17 to match actual product classification |
| 7 | Stock declaration in Part VI ≠ physical stock | Stock as per GST records (input stock) differs from accounting stock (includes WIP, finished goods) | Clarify: GSTR-9 Part VI asks for stock of inputs - not total inventory. Reconcile with stock audit report |
Step-by-Step: How Our CA Team Prepares GSTR-9 and GSTR-9C
Step 1: Ensure All Monthly Returns Are Filed (Month 1). GSTR-9 cannot be enabled without all GSTR-1 and GSTR-3B filed for the financial year. We verify filing status for every period and file any pending returns before starting GSTR-9 preparation.
Step 2: Download Auto-Populated Data (Month 1-2). We download Tables 6A, 8A, and auto-populated sections from the GST portal. These form the baseline - they represent what the portal 'thinks' you owe and what ITC you claimed.
Step 3: Four-Way Reconciliation (Month 2-3). GSTR-1 (outward supplies) vs GSTR-3B (tax paid) vs GSTR-2B (ITC available) vs Books of Accounts (purchase/sales register). This is the core work - matching at invoice level where necessary, identifying differences, and classifying each difference as: genuine additional liability, timing difference, or classification difference.
Step 4: Prepare Tables 10-14 (Amendments). Supplies and ITC adjustments made in April-September of the next FY that relate to the reporting year are captured here. This is where we report amendments that were filed in monthly returns but need to be reflected in the annual return. See our GST e-filing guide (know more) for monthly return compliance.
Step 5: Verify HSN Summary (Tables 17/18). Use the GSTN HSN Download Tool. Cross-verify with the product master. Ensure 6-digit codes are correct and rate-consistent. This is the section most clients rush - and where scrutiny notices originate.
Step 6: Stock Declaration (Part VI). Reconcile closing stock of inputs with the stock audit report (if conducted) and accounting records. The Part VI stock declaration is often confused with total inventory - it asks specifically for stock of inputs.
Step 7: Compute Additional Tax (Table 9). If reconciliation reveals genuine underpayment (turnover not reported, ITC overclaimed, RCM not paid), compute the additional liability and pay through DRC-03 before filing GSTR-9.
Step 8: Prepare GSTR-9C Reconciliation (For Turnover > Rs 5 Crore). Compare audited financial statements (turnover, tax, ITC) with GSTR-9 figures. Document and explain every material difference. Self-certify (or recommend CA certification for risk management). Use GST audit (know more) for audit-integrated GSTR-9C preparation.
Documents Our CA Team Collects for GSTR-9/9C Preparation
- GSTR-1 (all 12 months / 4 quarters) - filed copies from portal
- GSTR-3B (all 12 months / 4 quarters) - filed copies from portal
- GSTR-2A / GSTR-2B (all 12 months) - downloaded from portal
- Previous year's GSTR-9 and GSTR-9C (for reference and cross-period reconciliation)
- Sales register and purchase register from accounting software (Tally, SAP, Zoho)
- Trial balance and P&L statement (for turnover reconciliation in GSTR-9C)
- ITC register with invoice-level detail (for 6A/8A reconciliation)
- RCM register (for Table 4F/5 reconciliation)
- Credit notes and debit notes register
- Stock declaration data - closing stock of inputs as on 31 March
- HSN master - product/service code mapping at 6-digit level
- Audited financial statements (for GSTR-9C preparation)
- DRC-03 payment challans (if additional tax was paid during the year)
What Changed for 2026 Annual Returns: Our CA Team's Assessment
| 2026 Change | What It Does | Our CA Team's Assessment |
|---|---|---|
| IMS-Based Auto-Population | Table 8A includes IMS-accepted invoices; excluded invoices not counted | Positive: gives taxpayers control over what enters 8A. But requires proactive IMS use throughout the year - not just at year-end. |
| New Reversal Disclosure Fields | Separate reporting for Rule 37/37A reversals and reclaims | Adds complexity but improves clarity. The department can now track reversals at rule-level. Ensure reversal register is detailed. |
| HSN Download Tool | GSTN provides consolidated Table 12 data from GSTR-1/1A for Table 17 | Excellent tool - saves hours of manual HSN compilation. But verify against product master; GSTR-1 HSN errors carry through. |
| Separate Late Fee for GSTR-9 and GSTR-9C | Late fee calculated individually. GSTR-9 filed on time but GSTR-9C late still attracts fee. | File both together. Filing GSTR-9 on 25 December and GSTR-9C on 7 January costs unnecessary late fee. |
| 3-Year Time Bar on Old Annual Returns | GSTR-9 for FY 2021-22 (due 31 Dec 2022) permanently blocked after Dec 2025 | Critical: if you missed old annual returns, they are now permanently unfiled. Department can issue best judgment assessments. |
| Table 8H1 (New) | Imports reported in FY but ITC availed in next FY | Needed: resolves the Table 8I mismatch that was common in previous years for importers. |
For complete 2026 compliance change details, see our GST annual compliance checklist (know more).
Common Mistakes Our Clients Made Before Coming to Us
Mistake 1: Accepting auto-populated data without verification. Tables 6A and 8A are auto-filled and non-editable. But the data flowing into them comes from monthly returns - which may have had errors. Our team compares auto-populated data with books before filing. Differences between 6A and books must be explained - not ignored.
Mistake 2: Trying to claim additional ITC through GSTR-9. GSTR-9 is a summary return - not an ITC claiming mechanism. If you missed claiming ITC in GSTR-3B during the year, GSTR-9 cannot add it. The ITC must be claimed through GSTR-3B before the Section 16(4) deadline. GSTR-9 only reports what was already claimed.
Mistake 3: Not reconciling before filing GSTR-9C. Businesses file GSTR-9, then prepare GSTR-9C, and discover differences that should have been resolved before GSTR-9 was submitted. Since GSTR-9 is non-revisable, the differences become permanent reconciliation items that the department can question. Our approach: prepare GSTR-9C data first, resolve differences, then file GSTR-9.
Mistake 4: Confusing input stock with total inventory in Part VI. Part VI asks for closing stock of inputs - not total inventory (which includes WIP and finished goods). Many businesses enter total inventory, creating a mismatch with the ITC position. For detailed guidance on refund implications, see our GST refund guide (know more).
Mistake 5: Filing GSTR-9 on 31 December without review time. The portal is slowest on 31 December. Session timeouts, validation errors, and OTP delays are at peak. Our team completes all GSTR-9 preparation by 20 December and files by 25 December - leaving 5 days for contingency. If a GSTAT appeal ever arises from the annual return data, use GSTAT appeal filing (know more) services.
GSTR-9 vs GSTR-9C: Complete Comparison
| Parameter | GSTR-9 (Annual Return) | GSTR-9C (Reconciliation Statement) |
|---|---|---|
| Purpose | Consolidates all monthly/quarterly returns for the FY | Reconciles GSTR-9 data with audited financial statements |
| Who must file | Turnover > Rs 2 crore (mandatory); below Rs 2 crore (optional) | Turnover > Rs 5 crore only |
| Certification | Self-certified by taxpayer (DSC/EVC) | Self-certified from FY 2020-21 (previously CA-certified) |
| Structure | 6 parts, 19 tables: supplies, ITC, tax paid, amendments, HSN, stock | Part A (Reconciliation) + Part B (Certification/additional tax) |
| Data source | Auto-populated from GSTR-1, GSTR-3B, GSTR-2B; taxpayer verifies and adds | Audited financial statements compared with GSTR-9 figures |
| Revisable? | No - cannot be revised once filed | No - cannot be revised once filed |
| Late fee | Rs 200/day capped at 0.5% of turnover | Rs 200/day capped at 0.5% of turnover (calculated separately from GSTR-9) |
| Filing sequence | Must be filed before GSTR-9C | Can only be filed after GSTR-9 is submitted |
| Deadline | 31 December following the financial year | 31 December (same as GSTR-9) |
Penalties for GSTR-9 / 9C Non-Compliance
| Non-Compliance | Penalty | Additional Consequence |
|---|---|---|
| GSTR-9 filed late | Rs 200/day (Rs 100 CGST + Rs 100 SGST); capped at 0.5% of turnover in the state | Auto-calculated from 1 January 2026; portal flags non-compliance |
| GSTR-9C filed late | Rs 200/day (separate from GSTR-9 late fee); capped at 0.5% of turnover | Cannot be filed without GSTR-9; filing GSTR-9 on time but GSTR-9C late still attracts separate fee |
| GSTR-9 not filed (3-year bar) | Return permanently blocked; best judgment assessment under Section 62 | Department estimates liability from available data (bank, e-invoices, TCS); usually 2-5x actual |
| Additional tax discovered but not paid | Section 73/74 demand for the unpaid amount + interest + penalty | Table 9 is the disclosure mechanism; not paying creates Section 73/74 exposure |
| ITC overclaimed (6A > 8A) | Reversal with 24% interest; potential Section 73/74 demand | GSTR-9 filing makes the overclaim visible to the department permanently |
Key Takeaways
GSTR-9 is non-revisable - this single fact makes it the highest-risk GST filing. Every number must be verified before submission. Errors become permanent declarations that cannot be corrected.
The Table 8A vs Table 6A reconciliation (GSTR-2B ITC vs GSTR-3B claimed ITC) is where 90% of ITC disputes originate. Monthly reconciliation throughout the year prevents year-end surprises.
GSTR-9C reconciliation is where the department finds additional tax liability. Every difference between audited books and GST returns must be explained line by line. Unexplained differences invite Section 73/74 demands.
The 2026 changes - IMS auto-population, new reversal tables, HSN download tool, and separate late fee calculation - make the filing more data-rich but also more exposed to scrutiny.
Our CA team's workflow: prepare GSTR-9C reconciliation first, resolve differences, then file GSTR-9, then file GSTR-9C. Never file GSTR-9 without completing the GSTR-9C reconciliation first - even though the portal requires GSTR-9 before GSTR-9C.
Need Expert Help with Your GSTR-9 / 9C Filing?
Whether you need reconciliation-led preparation, GSTR-9C for turnover above Rs 5 crore, or a comprehensive annual compliance review - our CA team handles the complete GSTR-9/9C process for businesses across all sectors and sizes.
Explore our GST annual return services (know more) for reconciliation, filing, and advisory across Pune, Mumbai, Delhi, and all-India.
For queries, reach out at +91 945 945 6700 or WhatsApp us directly.
