Rule 86B GST: When You Cannot Use ITC to Pay More Than 99% of Your Tax

Most GST taxpayers assume they can use all available Input Tax Credit to pay their tax liability. For businesses with taxable turnover above Rs 50 lakh in a month, that assumption broke in January 2021. Rule 86B changed the game — and it still catches businesses off guard.

What Is Rule 86B?

Rule 86B was inserted into the CGST Rules, 2017 with effect from January 1, 2021. It restricts a registered person from discharging more than 99 percent of their GST output tax liability using ITC in a tax period. In plain terms: if your tax liability for a month is Rs 1,00,000, you must pay at least Rs 1,000 in cash. You cannot pay the entire Rs 1,00,000 from your electronic credit ledger.

Who Does Rule 86B Apply To?

Rule 86B applies to a registered person whose value of taxable supply — other than exempt supply and zero-rated supply — exceeds Rs 50 lakh in any month. This is calculated month by month. Cross Rs 50 lakh in taxable outward supply in any single month, and Rule 86B kicks in for that month's GSTR-3B.

The Four Exceptions — When Rule 86B Does NOT Apply

Exception 1 — The registered person or their proprietor, managing director, karta, managing partner, or whole-time director has paid more than Rs 1 lakh as income tax in each of the last two financial years.

Exception 2 — The registered person has received a refund of more than Rs 1 lakh under IGST paid on export of goods or services, or under the inverted duty structure (Section 54(3)).

Exception 3 — The registered person has discharged their output tax liability by paying cash of more than 1 percent cumulatively up to the said month in the current financial year. Once you have paid more than 1 percent in cash across the year so far, you are exempt.

Exception 4 — The registered person is a government department, public sector undertaking, local authority, or statutory body.

Why Was Rule 86B Introduced?

The rule targeted a specific fraud pattern: businesses were generating fake ITC through circular transactions and using it to completely wipe out cash liability, effectively paying zero cash to the government. By mandating a minimum 1 percent cash payment, the department ensures some real money flows in even if the ITC chain is fraudulent.

Practical Impact on Legitimate Businesses

For genuine traders and manufacturers with large ITC balances — especially those in the inverted duty structure — Rule 86B creates a cash flow problem. You may have crores of ITC sitting in your credit ledger but still need to pay 1 percent of a Rs 50 lakh+ monthly turnover in hard cash. Plan for this in your working capital.

Track your cumulative cash payment percentage through the year. Once you cross 1 percent cumulative cash payment (Exception 3), you are free of Rule 86B for the rest of the financial year.

Key Takeaway

Rule 86B is not a penalty — it is a cash payment floor. If your monthly taxable turnover exceeds Rs 50 lakh and none of the four exceptions apply, budget at least 1 percent of your tax liability in cash every month. Missing this triggers a GSTR-3B validation error and can block your return filing. For compliance tools and GST calculators, visit gstvala.com. Consult your CA for case-specific advice.