Record retention is dull until the moment it is decisive. A reassessment or a GST audit reaching back several years turns on what you can produce, and the absence of a document is frequently treated as the absence of the transaction. The complication is that income tax, GST and the Companies Act each set their own period, and they do not agree.
Who has to maintain books at all
Specified professions — the list includes legal, medical, engineering, architectural, accountancy, technical consultancy and interior decoration — must maintain prescribed books once they cross modest income or receipt thresholds. Other businesses and professions must maintain books sufficient to compute income once their income or turnover crosses the statutory tests.
Businesses that declare under presumptive taxation get relief from the detailed requirement — but only while they remain inside the scheme. Falling out of presumptive brings the books requirement back, and frequently a tax audit with it.
The three retention periods
| Law | Period | Counted from |
|---|---|---|
| Income tax | Six years | The end of the relevant assessment year |
| GST | Seventy-two months | The due date of the annual return for that year |
| Companies Act | Eight years | The end of the relevant financial year |
Two consequences follow. First, a company should default to eight years, because the longest applicable period governs in practice. Second, the counting bases differ — six years from the end of an assessment year is not the same calendar point as six years from the transaction, and the difference is roughly two years. Businesses that count from the invoice date destroy records early.
Where an assessment, appeal or investigation is pending for a year, retain everything for that year until it is finally concluded, regardless of the ordinary period.
What counts as books
- Cash book, ledger and journal, plus bills and receipts supporting entries.
- Purchase and sales registers, and stock records where inventory is held.
- Bank statements and reconciliations.
- Fixed asset register — necessary to defend depreciation claims years later.
- For GST: invoices issued and received, credit and debit notes, e-way bills, and the ITC reconciliation trail described in our input tax credit guide.
- For companies: statutory registers, board and general meeting minutes, and the filings covered in ROC annual compliance.
Electronic records
Books may be kept electronically, and for most businesses that is now the practical default. Two conditions matter: the records must remain accessible and legible in India for the retention period, and there must be an audit trail. Accounting software used by companies is required to have an edit log that cannot be disabled — a requirement that quietly rules out several older setups and any practice of rewriting prior-period entries.
If your books are behind, the fix is not to reconstruct them at notice time. Our backlog accounting service exists because that reconstruction is a specialist job, and the books backlog case study shows what it looks like in practice.
Where we come in
We set up books that are defensible years later — proper registers, a fixed asset schedule, and reconciliations kept current rather than assembled at year end. Our bookkeeping and MIS service runs the monthly cycle; backlog accounting handles years that were never closed properly.
This article is general information, not professional advice. Limits, rates and dates change by notification — confirm the position for your own year before acting on it.