GST Rule 86B — 1% Cash Payment Restriction, Exceptions, Calculation & Practical Guide

1. What is Rule 86B?

Rule 86B is a restriction on the use of the Electronic Credit Ledger for payment of output tax. Where its conditions are satisfied, the registered person cannot discharge more than 99% of the output-tax liability through ITC.

In practical language, the rule can require the business to pay at least 1% of the relevant output-tax liability through the Electronic Cash Ledger.

2. Why was Rule 86B introduced?

Rule 86B was introduced as an anti-evasion control. The underlying policy concern was that businesses with significant taxable outward supplies could potentially discharge almost the entire output liability through credit while generating insufficient cash-tax payment.

The rule therefore creates a minimum cash component for specified high-value taxable suppliers, while simultaneously providing exceptions for businesses that satisfy indicators such as substantial income-tax payment, qualifying refunds, sufficient cumulative cash payment, or specified public-sector status.

3. From when did Rule 86B apply?

The original insertion is recorded as effective from 1 January 2021. The 2026 amendment is particularly relevant to specified goods valued under Rule 31D, including specified tobacco/nicotine-related goods covered by that rule. citeturn1search0turn2search0

4. Exact statutory trigger — ₹50 lakh test

Rule 86B applies where the value of taxable supply, other than exempt supply and zero-rated supply, in a month exceeds ₹50 lakh.

This means the first question is not “How much GST do I have to pay?” The first question is:

Example

Taxable domestic supplies = ₹54 lakh; exempt supplies = ₹10 lakh; zero-rated exports = ₹30 lakh.

The Rule 86B trigger is based on the relevant taxable-supply category, not simply total turnover. Therefore the ₹54 lakh taxable-supply figure is the starting point for the threshold analysis.

5. What is taxable supply for Rule 86B?

The wording specifically excludes exempt supply and zero-rated supply from the value used for the ₹50 lakh threshold.

6. How the 99% ITC / 1% cash restriction works

Assume relevant output tax liability for the month is ₹20,00,000 and Rule 86B applies.

• Maximum output tax discharge through Electronic Credit Ledger: ₹19,80,000.
• Minimum through Electronic Cash Ledger: ₹20,000.

If the business has sufficient ITC but no cash balance, it may still need to generate cash through the prescribed challan/payment mechanism before filing/offsetting the return.

7. Detailed numerical examples

These calculations assume the rule applies and no exception is available. Always test the statutory exceptions first.

8. Exception 1 — Income-tax payment above ₹1 lakh

The restriction does not apply where the specified person or persons connected with the registered person have paid more than ₹1 lakh as income tax in each of the last two financial years for which the Section 139(1) return-filing time limit has expired.

The rule specifies different persons depending on the constitution of the entity, including the registered person, proprietor, karta, managing director, any of two partners, whole-time directors, members of a managing committee or board of trustees, as applicable.

Practical evidence

• Income-tax return acknowledgement.
• Tax computation.
• Challan/payment evidence.
• Assessment/tax records where useful.
• Board/partner documentation showing the relevant person.

9. Exception 2 — Refund of unutilised ITC for zero-rated supplies

The restriction does not apply where the registered person received a refund exceeding ₹1 lakh in the preceding financial year on account of unutilised ITC under the zero-rated-supply refund provision in Section 54(3).

This can be relevant to exporters and businesses making qualifying zero-rated supplies.

Example

A company received ₹2.5 lakh refund of unutilised ITC attributable to qualifying zero-rated supplies in the preceding financial year. If the other conditions are satisfied, this can support the Rule 86B exception.

10. Exception 3 — Refund of unutilised ITC for inverted duty structure

The rule separately recognises refund exceeding ₹1 lakh in the preceding financial year on account of unutilised ITC arising from the inverted duty structure under Section 54(3).

Maintain the refund order/application, relevant statements and bank credit evidence so the exception can be demonstrated during audit.

11. Exception 4 — More than 1% cumulative cash payment already made

This is one of the most misunderstood exceptions. The test looks at the amount of output-tax liability already discharged through the Electronic Cash Ledger, applied cumulatively up to the relevant month in the current financial year.

It is not necessarily a simple “this month's cash payment is more than 1%” test.

Example

Suppose cumulative output tax liability from April through September is ₹1 crore and cumulative cash discharge is ₹2 lakh. Cash payment is 2%, which is above 1%. The exception can therefore become relevant, subject to the exact statutory calculation and other conditions.

12. Exception 5 — Government Department, PSU, local authority and statutory body

The restriction does not apply to a registered person that is a Government Department, Public Sector Undertaking, local authority or statutory body, as specified in the rule.

For entities claiming this exception, retain constitutional/status documents establishing the entity's legal character.

13. 2026 amendment — Rule 31D goods

Notification No. 20/2025-Central Tax, dated 31 December 2025, effective 1 February 2026, introduced Rule 31D for valuation of specified goods on the basis of retail sale price and simultaneously inserted clause (f) into the first proviso to Rule 86B.

The new exception states that a registered person other than a manufacturer is exempted from Rule 86B only in respect of goods specified under Rule 31D on which tax has been paid by the supplier on the basis of retail sale price. citeturn2search0turn2search4

14. Manufacturer vs trader under the 2026 exception

15. How the cumulative 1% test should be understood

For the exception based on cash payment, maintain a cumulative table:

The working should be prepared using the exact output-tax and cash-ledger figures relevant to the rule. Keep a separate bridge for adjustments and avoid mixing bank payments with Electronic Cash Ledger credits.

16. Which transactions are included and excluded?

17. Industry-wise applicability

18. Construction and works-contract examples

Example A — ₹80 lakh taxable billing

A contractor has taxable outward supplies of ₹80 lakh in a month and output GST of ₹14.4 lakh. If no exception applies, maximum ITC utilisation under Rule 86B is ₹14.256 lakh and minimum cash discharge is ₹14,400.

Example B — high taxable turnover but export-heavy business

A contractor has ₹45 lakh domestic taxable supplies and ₹1.5 crore qualifying zero-rated supplies. The zero-rated supplies are excluded from the ₹50 lakh threshold, so the domestic taxable value itself is below ₹50 lakh.

Example C — cash exception

A construction company has already discharged more than 1% of its cumulative output tax through the Electronic Cash Ledger during the financial year. The finance team should document the cumulative calculation before concluding that the Rule 86B restriction continues.

19. Manufacturing and trading examples

A manufacturer has ₹2 crore taxable domestic sales and ₹30 lakh exports in a month. The export value is excluded from the Rule 86B threshold, but the ₹2 crore taxable domestic supply exceeds ₹50 lakh. The business must test the exceptions.

A distributor of specified Rule 31D goods from February 2026 should additionally examine whether the supplier paid tax on the RSP basis and whether clause (f) applies to those goods. citeturn2search0

20. IT, SaaS, consulting and service businesses

Service companies should not assume that high invoice value automatically means Rule 86B applies. First classify domestic taxable services, exports/zero-rated supplies, exempt services and non-GST receipts.

For SaaS businesses, maintain a separate export/zero-rating register. For consulting companies, map milestone invoices to the GST return period. For hospitals and mixed-supply businesses, segregate taxable and exempt revenue before the ₹50 lakh test.

21. Exports, SEZ and zero-rated supplies

Zero-rated supplies are specifically excluded from the ₹50 lakh trigger. However, businesses should preserve evidence establishing that the supply actually qualifies as zero-rated.

• Export invoice.
• Shipping bill/export documentation where applicable.
• LUT/bond where relevant.
• FIRC/BRC or other realisation evidence where relevant to the particular compliance.
• GSTR-1 and GSTR-3B reporting.
• Refund application/order if claiming ITC refund.

22. RCM and Rule 86B — common confusion

Rule 86B concerns use of the Electronic Credit Ledger to discharge output-tax liability in the specified circumstances. RCM is a separate liability mechanism where the recipient becomes liable for tax under the applicable reverse-charge provisions.

Therefore, do not calculate Rule 86B solely by taking every GST amount appearing in GSTR-3B. Build the output-tax and cash/credit working based on the statutory framework.

23. Relationship with Electronic Credit Ledger and Cash Ledger

24. What happens if Rule 86B is not complied with?

If the business attempts to utilise more ITC than permitted, the return/payment process can prevent the intended utilisation or require the shortfall to be discharged in cash. The business may therefore face a cash-flow requirement even though substantial ITC is available.

Repeated non-compliance should be investigated because it can indicate weak return controls, incorrect exception assessment or inadequate cash planning.

25. Rule 86B and Rule 86A — difference

26. Rule 86B and GSTR-3B filing controls

Before finalising GSTR-3B, the GST team should prepare a Rule 86B status sheet.

27. Monthly compliance working for accounts teams

For a multi-GSTIN company, perform the test GSTIN-wise. A group-level turnover figure should not automatically be used for an individual registration.

28. Audit evidence and documents

• Monthly sales register.
• GSTR-1 filed return.
• GSTR-3B filed return.
• Electronic Cash Ledger statement.
• Electronic Credit Ledger statement.
• Taxable/exempt/zero-rated reconciliation.
• Income-tax payment evidence for the exception.
• Refund orders and bank credits.
• Cumulative cash-payment calculation.
• Entity constitution/status documents.
• Rule 31D/RSP documentation where clause (f) is claimed.

29. Case-law and legal principles

Rule 86B litigation is narrower than Rule 86A litigation because Rule 86B is primarily a statutory utilisation restriction rather than an officer-driven ITC blocking power.

When defending a Rule 86B position, the strongest approach is usually documentary: establish the taxable-supply threshold, demonstrate the applicable exception and reconcile the Electronic Cash Ledger and Electronic Credit Ledger.

For Rule 86A matters, courts have separately emphasised statutory conditions, reasons to believe and the one-year restriction. Your website already has a detailed Rule 86A guide covering those judicial principles. citeturn0search1

30. Common mistakes

1. Calculating 1% of turnover instead of output tax.
2. Including exports in the ₹50 lakh threshold.
3. Ignoring the income-tax exception.
4. Ignoring qualifying refund history.
5. Checking cash payment month-by-month instead of maintaining the cumulative test.
6. Assuming all PSUs automatically qualify without checking legal status.
7. Treating the 2026 Rule 31D exception as a blanket trader exemption.
8. Mixing different GST registrations in one calculation.
9. Using bank balance instead of Electronic Cash Ledger balance.
10. Assuming available ITC can always be utilised at 100%.

31. Management checklist

• GSTIN-wise monthly taxable-supply report prepared.
• Exempt and zero-rated supplies separately identified.
• ₹50 lakh threshold tested.
• All Rule 86B exceptions tested and documented.
• Income-tax exception evidence retained.
• Refund exception evidence retained.
• Cumulative 1% cash calculation updated.
• Government/PSU/statutory status checked where relevant.
• 2026 Rule 31D exception tested where relevant.
• Electronic Credit Ledger reconciled.
• Electronic Cash Ledger reconciled.
• Minimum cash requirement funded before return filing where necessary.
• Reviewer approval obtained for large GSTINs.
• Working paper archived with GSTR-3B.

32. FAQs and final practical conclusion

Does Rule 86B mean I cannot use ITC?

No. It generally limits utilisation to 99% of relevant output tax where the rule applies. The balance must be discharged through the Electronic Cash Ledger unless an exception applies.

Is the ₹50 lakh threshold based on GST amount?

No. It is based on the value of relevant taxable supplies for the month, excluding exempt and zero-rated supplies.

Is the 1% calculated on turnover?

No. The minimum cash component is linked to the relevant output-tax liability, not 1% of turnover.

Are exports included in the ₹50 lakh threshold?

Qualifying zero-rated supplies are excluded by the rule.

Can an exporter escape Rule 86B automatically?

Not automatically. The business should test the statutory refund exception and other applicable conditions.

What changed from February 2026?

Notification 20/2025-Central Tax introduced Rule 31D and added a specific Rule 86B exception for a registered person other than a manufacturer in respect of specified Rule 31D goods where the supplier has paid tax on the RSP basis. citeturn2search0turn2search4

What is the best practical system?

Maintain a GSTIN-wise monthly Rule 86B dashboard with five outputs: taxable supplies, output tax, applicable exception, cumulative cash percentage and required cash payment.

Final takeaway

Rule 86B is primarily a cash-flow and GST-control rule. A company can have substantial eligible ITC and still need to fund a minimum cash payment. The right approach is not to wait for the return portal to reject utilisation; it is to identify the ₹50 lakh trigger, test every exception and calculate the cash requirement before finalising GSTR-3B.

Disclaimer: This article is educational and practical guidance. GST provisions and portal implementation are period-sensitive. Verify the exact law, notification, return period and facts before acting on a compliance position.