Think of Section 36 as the GST law's answer to one simple question: how long must you keep your books before you can safely throw them away? This matters a lot practically — businesses often want to clear old records to save storage space, but doing it too early can land you in serious trouble during a GST audit.
The basic rule is clean and easy to remember: keep your books of account and other records for 72 months (6 years) from the due date of filing the Annual Return (GSTR-9) for the relevant financial year. Notice it says due date of filing, not the actual date you filed. So even if you filed GSTR-9 late, the clock starts from the original due date. For FY 2022–23, the due date for GSTR-9 was 31st December 2023 — so records must be kept until 31st December 2029. This 72-month period is the standard retention period and is the most exam-tested part of this section.
Now here's the important exception — the extended retention rule. If you (or the Commissioner) have filed an appeal, revision, or any other proceeding before an Appellate Authority, Revisional Authority, Appellate Tribunal, or court, OR if you are under investigation for an offence under Chapter XIX (Offences & Penalties), then the 72-month clock is paused. You must keep those relevant records for 1 year after the final disposal of that appeal/proceeding/investigation, OR the standard 72-month period — whichever is later. The word later is key here: the law always picks the option that gives more time, ensuring records are never destroyed while a dispute is alive. This is asked frequently as a 4-mark question, especially the proviso part — examiners love testing whether students know when the extended period kicks in and how to calculate the final date.
Example 1 — Standard Retention
Rajesh & Co. Pvt. Ltd. is a GST-registered manufacturer. Its books of account for FY 2023–24 are in question.
- Due date for GSTR-9 (Annual Return) for FY 2023–24 = 31st December 2024
- Retention period = 72 months from 31st December 2024
- 72 months = 6 years → add 6 years to 31st December 2024
- Books must be retained until: 31st December 2030
Note: Even if Rajesh & Co. actually filed GSTR-9 on 15th January 2025 (late), the retention period still starts from 31st December 2024 (due date), not the actual filing date.
---
Example 2 — Extended Retention (Appeal Scenario)
Ms. Iyer runs a GST-registered trading firm. Her FY 2021–22 records are under dispute. The Commissioner filed an appeal against her before the GST Appellate Tribunal. The appeal was finally disposed of on 1st March 2030.
- Standard 72-month period: Due date of GSTR-9 for FY 2021–22 was 31st December 2022 → expires 31st December 2028
- Extended period: 1 year after final disposal = 1st March 2030 + 1 year = 1st March 2031
- Apply 'whichever is later' rule: 31st December 2028 vs. 1st March 2031
- Ms. Iyer must retain relevant records until: 1st March 2031
📖 Bare Act text — Section 36, CGST Act 2017
(click to expand)
Every registered person required to keep and maintain books of account or other records in accordance with the provisions of sub-section (1) of section 35 shall retain them until the expiry of seventy-two months from the due date of furnishing of annual return for the year pertaining to such accounts and records: Provided that a registered person, who is a party to an appeal or revision or any other proceedings before any Appellate Authority or Revisional Authority or Appellate Tribunal or court, whether filed by him or by the Commissioner, or is under investigation for an offence under Chapter XIX, shall retain the books of account and other records pertaining to the subject matter of such appeal or revision or proceedings or investigation for a period of one year after final disposal of such appeal or revision or proceedings or investigation, or for the period specified above, whichever is later.