Rule 86B Under GST in 2026: The 1% Cash Payment Rule Businesses Should Not Treat Casually
1. What is Rule 86B?
Rule 86B of the CGST Rules restricts the use of the amount available in the electronic credit ledger for payment of output tax in specified cases. The rule provides that where the value of taxable supply, other than exempt supply and zero-rated supply, in a month exceeds Rs. 50 lakh, the registered person cannot use ITC to pay more than 99% of that output tax liability.
Minimum cash payment = 1% of output tax liability
In plain terms, the rule forces a minimum cash contribution in cases where it applies. It was introduced as an anti-evasion measure to reduce risk of fake invoicing and paper-credit structures with negligible real cash payment.
2. Why Rule 86B Exists
The policy logic behind Rule 86B is not difficult to understand. GST authorities saw patterns where some businesses showed high outward taxable supplies, claimed large ITC balances and then discharged almost the entire liability through credit with little or no meaningful cash flow. In genuine businesses, this may sometimes happen naturally. But in fake invoicing or circular trading structures, this behaviour can also be a warning sign.
Rule 86B therefore acts as a risk-control provision. It does not accuse every taxpayer crossing the threshold of wrongdoing. It simply imposes a cash-payment floor unless the taxpayer qualifies for one of the prescribed exceptions.
3. When Does Rule 86B Apply?
The legal trigger is very specific. Rule 86B applies where the value of taxable supply other than exempt supply and zero-rated supply, in a month, exceeds Rs. 50 lakh.
What businesses often misunderstand
- The rule is not triggered by overall annual turnover alone
- The rule does not apply merely because GST registration exists
- The rule is not calculated on gross turnover including exempt and zero-rated supply
- The 1% is not calculated on turnover; it is calculated on output tax liability
So if a taxpayer has a month in which taxable supply crosses Rs. 50 lakh, the rule needs to be checked for that month. That is why a monthly pre-filing review before GSTR-3B is essential.
4. How the 1% Cash Payment Rule Works
Once Rule 86B applies and no exemption is available, the taxpayer must pay at least 1% of output tax liability through the electronic cash ledger. The balance, subject to the usual ITC conditions, may be discharged through ITC.
| Particulars | Amount | Explanation |
|---|---|---|
| Monthly taxable supply | Above Rs. 50 lakh | Rule 86B trigger is examined |
| Output tax liability | 100% | Base for the 1% computation |
| Maximum ITC usage | 99% | Electronic credit ledger cannot exceed this usage |
| Minimum cash usage | 1% | Must be discharged through electronic cash ledger unless exempt |
It is also important to note that clause (d) of the proviso creates a cumulative relaxation where the taxpayer has already discharged more than 1% of total output tax liability through the electronic cash ledger up to that month in the current financial year. This is often missed in practice.
5. Exemptions Under Rule 86B
Rule 86B contains important carve-outs. If any of the specified conditions are met, the restriction does not apply.
Exemption 1: Income tax payment test
The restriction does not apply if the registered person, or in specified non-individual cases the relevant specified persons such as the proprietor, karta, managing director, any two partners, whole-time directors, managing committee members or trustees, have paid more than Rs. 1 lakh as income tax in each of the last two financial years for which the due date to file return under section 139(1) has expired.
Exemption 2: Refund of unutilised ITC on zero-rated supplies
The restriction does not apply where the registered person received a refund of more than Rs. 1 lakh in the preceding financial year on account of unutilised ITC under clause (i) of the first proviso to section 54(3), broadly relating to zero-rated supplies made without payment of tax.
Exemption 3: Refund on inverted duty structure
The restriction also does not apply where the registered person received a refund of more than Rs. 1 lakh in the preceding financial year on account of unutilised ITC under clause (ii) of the first proviso to section 54(3), broadly relating to inverted duty structure.
Exemption 4: Cumulative cash payment already above 1%
If the registered person has already discharged output tax through the electronic cash ledger for an amount exceeding 1% of total output tax liability, applied cumulatively up to the said month in the current financial year, the restriction does not apply.
Exemption 5: Certain public entities
Government departments, public sector undertakings, local authorities and statutory bodies are outside the restriction.
6. Special 2026 Update: Rule 86B Was Further Refined
As of 1 February 2026, an additional carve-out was introduced through the Central Goods and Services Tax (Fifth Amendment) Rules, 2025, as summarised in the official GST Council Secretariat newsletter. A new clause (f) was inserted in the first proviso to Rule 86B for certain cases involving goods covered under newly inserted Rule 31D.
The summary states that registered persons other than manufacturers are exempt from Rule 86B restrictions in respect of goods covered by Rule 31D where tax has already been paid by the supplier on the basis of retail sale price.
7. Practical Examples
Example 1: Rule applies, no exemption available
ABC Traders has monthly taxable supply of Rs. 60 lakh. Its output tax liability for the month is Rs. 10 lakh. ITC balance is also Rs. 10 lakh. Since the taxable supply exceeds Rs. 50 lakh and assume no exemption applies, ABC cannot use the full ITC balance for payment.
Minimum cash payment at 1% = Rs. 10,000
Maximum ITC utilisation = Rs. 9,90,000
Example 2: Rule does not apply because exemption is available
Mr. Patel has monthly taxable supply of Rs. 70 lakh and output tax liability of Rs. 8 lakh. However, he has paid more than Rs. 1 lakh as income tax in each of the last two relevant financial years. In that case, the Rule 86B restriction does not apply and full ITC utilisation is not blocked merely because the monthly taxable supply crossed Rs. 50 lakh.
Example 3: Cumulative cash payment already saves the month
Suppose a taxpayer crossed the Rs. 50 lakh threshold again in September, but from April to August it has already discharged cash tax cumulatively above the 1% benchmark for the year. In that case, the taxpayer may fall within the clause (d) relaxation, depending on the cumulative working.
8. Does Rule 86B Mean Every Business Must Always Pay 1% Cash?
No. That is one of the most common oversimplifications. The rule does not say every registered person must always pay 1% in cash. It says the restriction applies only in specified high-value months and only where none of the exclusions in the proviso are available.
That is why a correct compliance review must ask three questions in this order:
- Has the monthly taxable supply other than exempt and zero-rated supply exceeded Rs. 50 lakh?
- If yes, is any exemption under the proviso available?
- If no exemption is available, what is the minimum required cash payment?
9. What Can Go Wrong if Rule 86B Is Ignored?
Ignoring Rule 86B usually does not create drama on day one, but it can create an avoidable compliance trail. If a taxpayer wrongly uses ITC in excess of the rule, the short cash payment can later become a dispute point.
Possible consequences in a disputed case
- Departmental query or scrutiny during return review or investigation
- Demand proceedings for the unpaid portion that should have been discharged in cash
- Interest exposure where tax is treated as short paid
- Penalty exposure depending on facts, explanation and surrounding compliance conduct
- A higher-risk profile if multiple return and ITC issues exist together
In practice, Rule 86B non-compliance often appears along with other issues such as ITC classification errors, GSTR-3B mismatches, aggressive credit utilisation or weak documentation. That combined profile is what usually creates deeper problems.
10. Common Errors Businesses Make
- Checking annual turnover instead of the monthly taxable supply test
- Including exempt or zero-rated supplies in the threshold analysis without understanding the rule language
- Assuming sufficient ITC balance means full set-off is always permitted
- Ignoring the exemption conditions entirely
- Missing the cumulative 1% cash-payment relaxation under clause (d)
- Using ERP or Excel logic that calculates output tax correctly but does not check Rule 86B
- Failing to preserve proof of income-tax payment or refund eligibility
11. Monthly Compliance Checklist Before GSTR-3B
- Check whether monthly taxable supply other than exempt and zero-rated supply exceeds Rs. 50 lakh
- Review whether any Rule 86B exemption applies
- Compute the output tax liability for the month
- Confirm the minimum cash payment requirement, if any
- Review cumulative cash payment position for the current financial year
- Cross-check ERP utilisation logic with the legal rule
- Retain working papers, refund records and income-tax proof for exemption support
12. Smart Internal Control Approach
Businesses that file GST smoothly usually do not handle Rule 86B manually at the last minute. They build it into the return workflow. That can be as simple as a monthly review note or as sophisticated as a rule-based ERP control.
A practical control framework would include:
- monthly taxable supply review
- exception tagging for exempt cases
- cumulative cash ratio tracking
- maker-checker review before filing GSTR-3B
13. Relevant Articles at DN & CO.
If you want to understand Rule 86B in the wider GST compliance context, these related DN & CO. articles are useful:
- GSTR-3B Changes 2026: Zero Mismatch, IMS, ITC Block and Interest Issues
- Top 5 GSTR-1 Filing Mistakes FY 2026-27
- RCM and ITC Key Updates FY 2026-27
- Blocked ITC Under GST Section 17(5): FY 2026-27 Guide
- Rule 86A GST: ITC Blocked Beyond One Year
- GST 2026 Important Updates: IMS, ITC and Compliance Checklist
- GST and Income Tax Compliance Changes FY 2026-27
14. Frequently Asked Questions
Is Rule 86B checked every month?
Yes. The trigger is based on the value of taxable supply other than exempt and zero-rated supply in a month, so it needs to be tested month by month.
Is the 1% calculated on turnover or tax liability?
It is calculated on output tax liability, not on turnover.
Can full ITC still be used if the monthly supply exceeds Rs. 50 lakh?
Yes, if the taxpayer qualifies under any of the Rule 86B exceptions, the restriction does not apply.
Does Rule 86B apply to zero-rated supplies?
The threshold wording specifically refers to taxable supply other than exempt supply and zero-rated supply. So zero-rated supply is excluded from the monthly trigger calculation.
What is the most overlooked exemption?
The cumulative cash-payment relaxation under clause (d) is one of the most overlooked parts of the rule.
Does every violation automatically lead to registration suspension?
No. That is too strong a statement. A violation can create short-payment and scrutiny issues, but registration suspension is not an automatic direct consequence of every Rule 86B error.
Can excess cash paid remain usable later?
Yes. Amount paid into the electronic cash ledger remains available for use in accordance with GST payment rules.
Does Rule 86B matter for composition taxpayers?
For practical purposes, the rule is relevant to taxpayers using ITC for output tax payment. Composition taxpayers do not ordinarily operate through that ITC set-off mechanism in the same way.
15. Final Professional Takeaway
Rule 86B is easy to underestimate because the percentage looks small. But from a compliance perspective, it is not a small rule. It is a return-control rule. If the month crosses the threshold and the exemption review is skipped, even a technically small short cash payment can turn into a larger documentation and litigation problem later.
The safest approach is simple: do not rely on memory, do not rely on myths, and do not assume that ITC availability alone settles the question. Review the monthly taxable supply, test the exemptions, compute the required cash amount correctly and preserve the working.
16. References
- CBIC: Central Goods and Services Tax Rules, 2017 (consolidated text containing Rule 86B)
- CBIC GST Payment Rules overview
- GST Council Secretariat Newsletter summarising Notification No. 20/2025-Central Tax and the 1 February 2026 Rule 86B refinement
- GST Council: CGST Tax Notifications listing