CBIC Circular 261/07/2026-GST: Complete Section 17(4) 50% Banking ITC Compliance Guide for CAs & CFOs

Statutory Background: The Section 17(4) Special Regime for the BFSI Sector

The Central Board of Indirect Taxes and Customs (CBIC) has issued Circular No. 261/07/2026-GST dated 26 October 2026 under Section 168 of the Central Goods and Services Tax (CGST) Act, 2017, resolving critical ambiguities regarding the 50% Input Tax Credit (ITC) mechanism for the banking, financial services, and insurance (BFSI) sector. Operating under Section 17(4) of the CGST Act read with Rule 38 of the CGST Rules, 2017, banking companies, financial institutions, and Non-Banking Financial Companies (NBFCs) face persistent operational friction when apportioning common input taxes between taxable fee-based services and exempt interest income from loans and advances.

To eliminate cumbersome monthly turnover apportionment formulas under Section 17(2) and Rules 42 and 43, the legislature enacted Section 17(4) as an elective statutory shortcut. Under this provision, eligible financial entities can elect to avail exactly 50% of their eligible input tax credit every month, while the remaining 50% permanently lapses. However, diverging field interpretations across GST commissionerates regarding multi-activity registrations (such as bullion trading desks), inter-branch supplies under the second proviso to Section 17(4), and the integration of the newly rolled-out Invoice Management System (IMS) triggered widespread audit objections and Section 73/74 notices. Circular No. 261/07/2026-GST establishes uniform nationwide compliance standards for CFOs, tax directors, and statutory auditors.

Core Clarifications in CBIC Circular No. 261/07/2026-GST

Circular No. 261/07/2026-GST delivers decisive administrative and statutory guidance across three foundational compliance dimensions:

1. Non-Banking Verticals & Bullion Trading Desks: Ineligibility for Section 17(4)

A contentious dispute arose during GST audits where banks and NBFCs engaged in trading activities—most notably wholesale bullion trading, precious metals import, or commodity distribution—availed the blanket 50% ITC shortcut across all business streams. Tax authorities contended that trading in goods does not qualify as banking or lending services, leading to revenue leakages or artificial credit compression.

CBIC has clarified that the option under Section 17(4) is strictly contingent upon the primary operational character of the registered person: supplying services by way of accepting deposits and extending loans or advances. Where an entity, or an independent business vertical registered separately under the same PAN, is engaged solely in trading goods such as bullion trading, it neither has the option nor is permitted or required to comply with Section 17(4). Such non-lending registrations must compute credit eligibility strictly under the general apportionment framework of Section 17(2) read with Rules 42 and 43 of the CGST Rules, segregating taxable trading supplies from exempt activities on actual turnover metrics.

2. The Second Proviso: Inter-Branch Supplies Between Distinct Persons

The second proviso to Section 17(4) explicitly carves out an exception to the 50% restriction for taxes paid on supplies between distinct persons (different GSTINs under the same PAN, such as head office and branch offices). Under this proviso, recipient branches can claim 100% ITC without any 50% reduction.

However, field formations raised queries regarding whether this 100% credit applies when the supplying distinct entity is a specialized unit not engaged in banking (for instance, an in-house shared service center, data management unit, or retail sales arm under the same PAN). Circular No. 261/07/2026-GST clarifies that the benefit of the second proviso applies solely to supplies received from another registered person under the same PAN who has also opted to adhere to the provisions of Section 17(4). Where cross-charges or internal service billings originate from an entity or vertical operating under normal tax provisions (or Section 17(2)), the recipient banking branch must evaluate the supply under general valuation rules and cannot automatically apply the blanket second proviso without establishing mutual Section 17(4) governance.

3. Blocked Credits Under Section 17(5) Must Be Excluded Prior to 50% Calculation

A prevalent operational flaw identified across banking audits is applying the 50% ratio directly against total gross ITC appearing in FORM GSTR-2B. Circular 261 reiterates Rule 38(a) of the CGST Rules: input tax credit attributable to supplies blocked under Section 17(5) is completely inadmissible. Banks cannot claim 50% of motor vehicle expenses, food and catering, staff insurance (outside statutory mandates), or works contracts for immovable property construction. Blocked credits must be segregated and eliminated at 100% first; the 50% formula applies strictly to the remaining eligible credit.

Integration with Invoice Management System (IMS) & FORM GSTR-3B Table 4 Reporting

With the nationwide implementation of GSTN's Invoice Management System (IMS), registered entities now possess an active mechanism to Accept, Reject, or Keep Pending supplier invoices before monthly auto-population into GSTR-2B. Circular No. 261/07/2026-GST provides authoritative instructions on reporting Section 17(4) credits in FORM GSTR-3B under both IMS-enabled and manual workflows:

Workflow A: When Utilizing the Invoice Management System (IMS)

1. Invoice Verification on IMS: Accounts payable teams inspect incoming invoices on IMS. Invoices from genuine suppliers for eligible business procurements are marked as Accepted. Invoices with billing discrepancies, wrong GSTINs, or unfulfilled services are marked as Rejected or Pending.
2. Auto-Drafting into GSTR-2B: On the 14th of the succeeding month, accepted and deemed-accepted invoices flow into FORM GSTR-2B.
3. Auto-Population into GSTR-3B Table 4(A): The total tax on accepted invoices auto-drafts into Table 4(A)(5) (All Other ITC) and Table 4(A)(4) (Inward supplies from ISD).
4. Permanent Reversal in Table 4(B)(1): Ineligible credits blocked under Section 17(5) and the 50% ineligible portion calculated under Section 17(4) must be reported in Table 4(B)(1) [As per rules 38, 42 and 43 of CGST Rules and section 17(5)].
5. Net Credit Availment in Table 4(C): The net amount populating the Electronic Credit Ledger in Table 4(C) reflects exactly: [50% of Eligible Inward Supplies] + [100% of Distinct Person Inter-Branch Supplies under 2nd Proviso].

Workflow B: When Processing Without IMS (Direct GSTR-2B Uptake)

Where an entity does not actively take actions on the IMS dashboard, all supplier invoices filed in GSTR-1/IFF are deemed accepted and flow directly into GSTR-2B. The taxpayer must execute manual ERP filtering to determine the eligible base under Section 16, eliminate Section 17(5) blocked credits, calculate 50% on the residual eligible pool, and report the permanent 50% reduction in Table 4(B)(1). Circular 261 explicitly warns that regardless of the dashboard mechanism adopted, the final credit credited to the Electronic Credit Ledger must precisely match statutory entitlements.

Comprehensive Numerical Illustration: Banking ITC Computation Under Rule 38

To demonstrate the exact mathematical application prescribed under Circular No. 261/07/2026-GST and Rule 38, consider the monthly procurement profile of Apex Commercial Bank Ltd (Maharashtra Branch) for October 2026:

FORM GSTR-3B Table 4 Reporting Breakdown

• Table 4(A)(5) [Gross Inward Supplies]: Enter ₹85,00,000 (auto-populated from GSTR-2B).
• Table 4(B)(1) [Permanent Reversals]: Enter ₹40,00,000, comprising:
  • Section 17(5) blocked credits: ₹10,00,000 (Catering ₹6L + Motor Vehicles ₹4L).
  • Section 17(4) 50% statutory lapse: ₹30,00,000 (50% of ₹60,00,000 eligible third-party procurement).
• Table 4(C) [Net ITC Available]: Exactly ₹45,00,000 (₹20L + ₹5L + ₹5L + ₹15L inter-branch credit).
• Lapsed Credit (Extinguished): ₹30,00,000 is permanently written off in the profit and loss statement under indirect tax expense and cannot be revived.

Comparative Analysis: Pre-Circular Ambiguity vs. Circular 261 Mandate

Legal Liabilities & Penalties for Non-Compliance

Failure to adhere to the rigorous computational architecture under Circular 261 triggers immediate statutory sanctions under the CGST Act:

• Wrongful Availment of Lapsed Credit (Section 73 / 74 / 74A): Re-availing the 50% lapsed credit or availing 50% of Section 17(5) blocked expenses constitutes wrongful credit availment. Under Section 74A (applicable from FY 2024-25 onwards), tax officers can issue demands for tax recovery along with penalty equal to 10% of tax due (non-fraud) or 100% of tax due (wilful misstatement/suppression).
• Mandatory Interest Under Section 50(1): Where wrongfully availed credit has been utilized to discharge outward tax liabilities, mandatory interest at 18% per annum applies from the date of utilization of the Electronic Credit Ledger until the date of reversal or cash payment.
• Annual Return Exposure in FORM GSTR-9: Incorrectly parking 50% lapses in Table 4(B)(2) distorts Table 8 reconciliation in GSTR-9 and leads to adverse observations in Form GSTR-9C certifications by statutory auditors.

5-Point Actionable Execution Checklist for Banking & NBFC Finance Teams

Corporate tax heads, CFOs, and bank audit teams should deploy this execution framework across all state GST registrations immediately:

• ✔ Audit Business Verticals & Registrations: Segregate registrations solely engaged in bullion trading, commodity broking, or wealth advisory. Ensure these units do not opt for Section 17(4) and compute credit via Section 17(2) turnover formulas.
• ✔ Configure ERP Pre-Filters for Section 17(5): Calibrate SAP, Oracle Financials, or Finacle to flag and strip 100% of Section 17(5) blocked expenses (employee benefits, motor vehicles, catering) prior to routing eligible balances to the 50% apportionment engine.
• ✔ Verify Distinct Person Supplier Regimes: Review inter-branch billing masters under the second proviso to Section 17(4). Verify that distinct supplier GSTINs under the same PAN operate under Section 17(4) before claiming 100% unreduced credit.
• ✔ Enforce Table 4(B)(1) Permanent Reversals in GSTR-3B: Standardize filing SOPs across all regional branches to ensure that the 50% lapsed credit is mapped strictly to Table 4(B)(1) and never Table 4(B)(2). Reconcile monthly with GSTR-2B reconciliation reports.
• ✔ Standardize IMS Action Timelines: Mandate that branch accounts payable teams finalize IMS invoice actions (Accept / Reject / Pending) prior to the 10th of each month to guarantee clean auto-drafting into GSTR-2B without last-minute portal scrambles.