GSTR-9 Reconciliation for FY 2025-26: A November Checklist for Indian MSMEs

November is a useful time for Indian businesses to reconcile FY 2025-26 GST records ahead of the normal 31 December annual-return deadline. This guide explains how to compare books, GSTR-1, GSTR-3B and input tax credit records without losing the evidence behind each difference.Check whether the return appliesStart with registration type and aggregate turnover across all GSTINs under the PAN. The FY 2025-26 annual-return exemption generally covers aggregate turnover up to ₹2 crore; businesses above that threshold normally file GSTR-9. GSTR-9C generally applies above ₹5 crore. Specific taxpayer categories are excluded. Verify the applicable notification and the live portal before filing. Do not treat a turnover estimate for one GSTIN as a PAN-level calculation.Collect a complete evidence folderExport monthly sales and purchase ledgers, credit notes, debit notes, GSTR-1, GSTR-3B, GSTR-2B, HSN summaries and tax-payment records. Keep original exports unchanged and create working copies. Record extraction dates and file owners. If any month is missing, flag it before reconciliation. For businesses with several GST registrations, maintain a separate workbook for each GSTIN and a separate consolidated turnover sheet.Reconcile outward suppliesCompare taxable sales in books with GSTR-1 and then with liability declared in GSTR-3B. Separate B2B, B2C, exports, exempt supplies and credit notes. Investigate differences invoice by invoice. Common causes include a March invoice reported later, duplicate entries, cancelled invoices, amendments and incorrect place-of-supply classification. Do not use an unexplained balancing entry to force the totals to match.Reconcile input tax creditCompare the purchase register with GSTR-2B and the ITC actually claimed in GSTR-3B. A supplier invoice in the books is not sufficient proof of eligibility. Check applicable statutory conditions, reversals, blocked credits, later claims and re-availment. Record the period of original purchase separately from the period of credit claim. Confirm the statutory cut-off for FY 2025-26 and do not assume a year-end reconciliation creates a new right to claim expired credit.Example: explain a ₹12 lakh sales gapSuppose the books show ₹1.20 crore of taxable sales and GSTR-1 shows ₹1.08 crore. The difference is ₹12 lakh. Investigation finds ₹7 lakh reported in a later period, ₹3 lakh of cancelled invoices incorrectly included in a summary and ₹2 lakh still unexplained. These items require different actions. A timing difference is not the same as an error, and an unexplained amount is not automatically taxable. Document the evidence and obtain professional review before amendments or payments.Build an exception registerUse columns for GSTIN, invoice ID, date, customer or supplier, taxable value, tax amount, source reports, difference, reason, evidence link, owner, action and closure date. Assign open, investigating or closed status. A reviewer should sign off on material differences. Preserve original figures alongside corrected figures so later questions can be answered without reconstructing emails. A materiality threshold helps prioritise work but does not override legal obligations.A 15-day work planDays 1 to 3: download records and confirm filing obligations. Days 4 to 6: reconcile sales, notes and amendments. Days 7 to 9: reconcile purchases, GSTR-2B and ITC. Days 10 to 11: review tax paid and reversals. Days 12 to 13: resolve high-value exceptions and verify HSN summaries. Day 14: prepare a draft filing pack. Day 15: obtain accountant review and management sign-off. This is a suggested internal schedule, not a government deadline.Common mistakesDo not assume auto-populated data is always correct. Do not mix PAN-level and GSTIN-level turnover. Do not treat all GSTR-2B entries as eligible credit. Do not ignore amendments and credit notes. Do not file with unexplained differences merely to finish early. Do not overwrite the evidence workbook without version history. Keep a list of decisions that require tax-adviser confirmation.FAQsIs GSTR-9 the same as GSTR-9C? No. The latter is a reconciliation statement for taxpayers meeting the applicable threshold. Can I file if monthly returns are pending? The portal generally requires the relevant GSTR-1 and GSTR-3B filings first. Can GSTR-9 fix every historical error? No. Correction mechanisms and time limits depend on the underlying transaction and legal provisions. What should I do first? Create a complete record index and identify the ten largest unresolved differences.Take action todayExport one GSTIN's twelve months of GSTR-1 and GSTR-3B data. Match it with the sales ledger and log every difference with an owner. Repeat the method for other registrations and purchase records. Have your tax professional check the completed reconciliation against current official guidance before submission.Primary sourcesCBIC Rule 80GST PortalGST Council