For an Indian GST audit or assessment, assemble the records behind your books and returns, reconcile them to the figures and claims reported, and make sure they can be retrieved and produced in a readable, authenticated form. Under section 36 of the Central Goods and Services Tax Act, the ordinary retention period is 72 months from the due date for furnishing the annual return for the year the records relate to—not 72 months from the end of the tax period. A related appeal, revision, other proceeding or covered investigation can extend retention. Read section 36 of the CGST Act.
How long do you need to keep GST records?
Section 36 of the CGST Act sets the ordinary period at 72 months, counted from the due date for furnishing the annual return for the year to which the records pertain. The due date is the anchor; the end of a financial year or tax period is not a substitute.
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If records relate to an appeal, revision, another proceeding or a covered investigation, retain them until one year after final disposal or until the ordinary period expires, whichever is later. This means a file’s age alone is not enough to decide that it can be destroyed. Check whether a relevant matter is pending and identify the records connected with it before setting a disposal date. See the CGST Act, section 36.
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What should you collect for an audit or assessment?
The CGST Accounts and Records Rules provide a baseline. Which items apply depends on your registrations, business activities and the period being reviewed. Collect the source evidence behind the books, returns, tax payments and claims—not just summaries or a return export. The Accounts and Records Rules set out the relevant recordkeeping categories.
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- Supply and tax documents: tax invoices, bills of supply, debit and credit notes, delivery challans, and receipt, payment or refund vouchers, as applicable. The Tax Invoice, Credit and Debit Notes Rules cover related document requirements.
- Tax and input-tax records: accounts of tax payable, collected and paid, input tax and input tax credit claimed, plus registers of relevant invoices, notes and challans.
- Transaction-specific records: documents for imports, exports and supplies subject to reverse charge, and e-way bills where relevant.
- Stock records, where applicable: opening balance, receipts, supplies and closing balance, with records of losses, theft, destruction, write-offs, gifts or free samples. Account for raw materials, finished goods, scrap and wastage as relevant.
- Advances and business activities: records of advances received, paid and adjusted, and separate records by activity where required.
- Supporting books and digital context: financial accounts, source documents and the information needed to interpret electronic records, including layouts, data dictionaries and code explanations.
How to prepare a traceable record set
The following workflow is a practical way to organize the evidence. It is not a separate statutory checklist; the notice and applicable provisions determine what must be provided.
- Read the actual communication. Identify the period, registrations, officer, requested records, scope and response deadline from the notice or other communication. Do not assume every assessment, inquiry or audit follows the same process.
- Gather records for the stated scope. Bring together the relevant books, filed returns and statements, tax-payment and ledger evidence, and source documents that support reported amounts. Add import, export, reverse-charge, stock and advance records where they apply.
- Reconcile the main positions. Link outward and inward supplies, turnover, tax rates, exemptions, deductions, input tax credit and refunds to their supporting records. Identify differences and corrections, and preserve a clear explanation of each.
- Build an index. Map each requested item to its file, ledger entry, return period and relevant claim. If you provide material electronically, record what was supplied and when.
- Keep the source and working copies understandable. Preserve original records and a reliable working copy. Retain any explanations needed to interpret file layouts, codes and links between source documents and financial accounts.
- Check retention before disposal. Calculate the ordinary period from the annual-return due date and check for a related pending matter that could extend it.
What GST audits may examine
Under section 65, the Commissioner or an authorized officer may conduct an audit. The audit rules describe examination of the documents underlying books and returns, including turnover, exemptions and deductions, tax rates, input tax credit availed and utilized, refund claims and other relevant matters. Organizing records around these subjects helps connect each reported position to its evidence. The Assessment and Audit Rules describe the audit process, including communication of discrepancies, consideration of the registered person’s reply and communication of findings.
The reviewed text of section 65 states that the registered person is to be informed of an audit by notice at least 15 working days beforehand. It also states a three-month completion framework from commencement, which may be extended by up to a further six months for recorded reasons. Commencement is tied to the later of records being made available or the audit being instituted at the place of business. These are statutory procedure details, not a timetable to assume for every matter; check the currently applicable text and the communication you received. See section 65 of the CGST Act.
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How to preserve electronic and paper records
Electronic records
The Accounts and Records Rules require proper backups so information can be restored within a reasonable period after accidental or natural destruction. Keep backups in a form that can be recovered, and periodically check that the exported files remain readable. On demand, relevant records must be producible in authenticated hard copy or a readable electronic format.
Maintain the context needed to audit electronic data: the audit trail and inter-linkages between source documents and financial accounts, record layouts, data dictionaries, code explanations, record counts and sample documents. The rules restrict erasing, effacing or overwriting entries and call for an edit or deletion log for electronically maintained records. Keep credentials and explanations secure, but ensure authorized staff can retrieve them when needed.
Paper records
If you retain paper invoices and supporting documents, labeled folders or binders can help organize them by period or category. They are an optional filing aid, not a legal requirement or a substitute for complete, accessible records and the applicable retention period.
Choosing recordkeeping software
If you use GST accounting or record-management software, assess it against the records you actually need to preserve. Useful checks include whether it can:
- export source data in a readable format and preserve the information needed to interpret it;
- create backups that can be restored and tested;
- maintain audit trails and links to source documents;
- cover the transactions and registrations relevant to your business; and
- produce authenticated records and supporting explanations on demand.
These are functional checks derived from the recordkeeping requirements, not a ranking of products.
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