RCM on security services: commercial, corporate, and non-body corporate rules

In our experience reviewing monthly purchase registers for corporate clients, security service billing causes frequent disputes between finance departments and facility vendors. Accounts executives often ask whether a proprietorship agency should charge GST on its bill, why an invoice does not appear in Form GSTR-2B, or whether accumulated credit can pay the resulting liability. Understanding the exact statutory boundary between body corporate and non-body corporate vendors resolves these questions and protects your business from interest demands under Section 50.

The statutory rule: Notification No. 29/2018-Central Tax (Rate)

The reverse charge mechanism for security personnel was introduced with effect from 1 January 2019. Under Section 9(3) of the CGST Act, the central government issued Notification No. 29/2018-Central Tax (Rate), amending parent Notification No. 13/2017-Central Tax (Rate) by inserting Entry 14.

Entry 14 specifies three strict conditions that must occur together for reverse charge to trigger:

• Nature of service: Security services provided specifically by way of supply of security personnel.
• Supplier status: Any person other than a body corporate. This includes sole proprietors, partnership firms, Hindu Undivided Families (HUFs), and associations of persons (AOPs).
• Recipient status: A registered person located in the taxable territory.

“Security services (services provided by way of supply of security personnel) provided to a registered person: Provided that nothing contained in this entry shall apply to a Department or Establishment of the Central Government or State Government or Union territory; or local authority; or Governmental agencies; which has taken registration... only for the purpose of deducting tax under section 51... or a registered person paying tax under section 10 of the said Act.” Entry 14, Notification No. 13/2017-Central Tax (Rate) as amended by Notification No. 29/2018-Central Tax (Rate)

When all three conditions are satisfied, the supplier must not charge GST on the commercial invoice. The recipient registered entity steps into the shoes of the supplier, pays the tax directly to the government, and reports the transaction in Form GSTR-3B.

Body corporate vs non-body corporate: who pays GST?

The classification of the supplier entity dictates whether forward charge or reverse charge applies. Under Section 2(20) of the Companies Act, 2013, read with Section 2(11) of the CGST Act, a body corporate includes a private limited company, public limited company, one-person company (OPC), foreign company, and limited liability partnership (LLP).

Notice the boundary in practice. If your factory hires armed guards from an incorporated security company such as SIS Limited or Group 4 Securicor, the supplier issues a regular tax invoice charging 18% GST. You pay the full bill to the supplier and claim input tax credit through normal GSTR-2B matching. But if your factory engages guards from a local partnership or proprietor agency, the agency must issue an invoice with zero tax, and your accounts team must pay the 18% GST under RCM.

Exemptions where RCM does not apply

Notification No. 29/2018-Central Tax (Rate) contains an explicit proviso exempting two specific classes of recipients from paying reverse charge on security personnel:

1. TDS deductors registered under Section 51 only: Departments of Central or State Government, local authorities, or governmental agencies that obtain GST registration solely to deduct tax at source under Section 51, and do not make independent taxable supplies.
2. Composition taxpayers under Section 10: Small business entities paying tax under the composition levy are outside the ambit of RCM for inward security personnel supplies.

In addition, when a non-body corporate security agency supplies guards to an unregistered individual or an unregistered commercial establishment, reverse charge does not apply. If the supplier crosses the general registration threshold of ₹20,00,000 for services, the supplier must register and discharge tax under forward charge.

Cash ledger payment and ITC rules under Section 16 and Section 49(4)

Two statutory restrictions govern how reverse charge tax must be paid and claimed:

First, under Section 49(4) of the CGST Act read with Section 2(82), input tax credit in your electronic credit ledger can be used only to discharge output tax. Section 2(82) explicitly states that output tax excludes tax payable on a reverse charge basis. Therefore, your accounts team cannot use accumulated ITC to settle security RCM liabilities. You must deposit cash into your electronic cash ledger via Form GST PMT-06 and offset the liability.

Second, once paid in cash, is that tax recoverable as credit? Yes. Under Section 2(62), input tax includes tax payable under sub-sections (3) and (4) of Section 9. Under Section 16(1) of the CGST Act, a registered person is entitled to take credit of input tax charged on supplies used or intended to be used in the course or furtherance of business. Security protection for office premises, factories, and warehouses is directly linked to business operations, making the credit 100% eligible.

Third, under Section 16(2)(c), credit is admissible once the tax has been actually paid to the government. Because you discharge RCM cash liability in Form GSTR-3B for the tax period, you are legally entitled to claim that exact amount as eligible credit in Table 4(A)(3) of the very same monthly GSTR-3B return.

Fourth, Section 16(2) second proviso requires payment to the supplier within 180 days of the invoice date, but it explicitly carves out supplies on which tax is payable on reverse charge basis. For related procedural guidelines on input tax credit, review our foundational article on RCM on legal services by advocate and ITC eligibility.

Invoicing rules: Section 31(3)(f) self-invoicing and Section 31(3)(g) payment vouchers

Documentation for security RCM depends on whether the vendor holds an active GST registration:

Scenario A: Registered non-body corporate vendor. The supplier holds a GSTIN and issues a tax invoice under Section 31. The supplier must mention its GSTIN, the recipient GSTIN, the description of personnel supplied, and must mark the reverse charge field as YES. The supplier does not collect tax on the bill. That invoice serves as the primary accounting document.

Scenario B: Unregistered security vendor. Many local security contractors operate below the ₹20,00,000 threshold and hold no GSTIN. Under Section 31(3)(f) of the CGST Act read with Rule 36(1)(b) of the CGST Rules, the recipient registered person must issue a self-invoice on the date of receipt of the security services. In addition, under Section 31(3)(g), the recipient must issue a payment voucher to the vendor at the time of disbursing payment. The self-invoice is your statutory document to support the credit claim.

Step-by-step reporting workflow in Form GSTR-3B

Follow this five-step accounting checklist during monthly return preparation:

1. Verify vendor legal structure: Check the vendor GST certificate or PAN structure. If the fourth character of the PAN is P (individual/proprietor) or F (partnership firm), tag the vendor in your ERP as subject to RCM.
2. Generate self-invoice when unregistered: For vendors without a GSTIN, create an internal self-invoice with consecutive serial numbering unique for the financial year under Rule 46.
3. Declare liability in Table 3.1(d): On the GST portal, enter the taxable billing amount and the computed 18% GST (9% CGST + 9% SGST for intra-state, or 18% IGST for inter-state) in Table 3.1(d) of Form GSTR-3B. Consult the official GSTN GSTR-3B user manual for table architecture.
4. Discharge liability in cash: In Table 6 of Form GSTR-3B, offset the reverse charge tax liability exclusively through the electronic cash ledger. Generate a PMT-06 challan if the ledger balance is insufficient.
5. Claim input credit in Table 4(A)(3): In the same return, enter the discharged tax amount under Table 4(A)(3) for Inward supplies liable to reverse charge. The credit immediately augments your electronic credit ledger balance for offsetting future forward liabilities.

Worked rupee example: manufacturing unit security bill

Consider Precision Forge Private Limited, a corporate manufacturing enterprise in Vadodara, Gujarat. In September 2026, the company engages Eagle Security Services, a partnership firm, to deploy six security guards at its factory gate. The agency bills ₹1,50,000 for the month.

The exact rupee sequence unfolds as follows:

• Precision Forge pays the net invoice amount of ₹1,50,000 directly to Eagle Security Services. Eagle Security does not collect tax.
• In its September 2026 Form GSTR-3B filed by 20 October 2026, Precision Forge enters ₹1,50,000 taxable value in Table 3.1(d) with ₹13,500 CGST and ₹13,500 SGST.
• The company deposits ₹27,000 into its electronic cash ledger and offsets the liability in Table 6.
• Simultaneously, Precision Forge reports ₹13,500 CGST and ₹13,500 SGST in Table 4(A)(3).
• Net financial impact: the company pays ₹27,000 in cash to the treasury on the 20th and receives ₹27,000 immediately in its electronic credit ledger. The net tax cost to the business is zero.

GSTR-2B reconciliation and common audit traps

Handling security RCM during monthly GSTR-2B reconciliation requires monitoring two separate scenarios:

Scenario 1: Supplier is registered and files Form GSTR-1. If Eagle Security files Form GSTR-1 on or before the 11th of the following month, marking Reverse Charge = Y, the invoice flows into Precision Forge's GSTR-2B under the inward reverse charge section. This auto-populates Table 3.1(d) and Table 4(A)(3) of Form GSTR-3B. For broader principles of inward transport and contractor matching, see our guide on RCM on Goods Transport Agency GTA declarations.

Scenario 2: Supplier is unregistered or fails to report RCM flag. If the vendor is unregistered, no record will ever arrive in Form GSTR-2B. Your accounting software must identify these vouchers from internal books and add them to your GSTR-3B declarations manually. Never wait for an unregistered invoice to show up in GSTR-2B, or you will delay payment and incur 18% annual interest under Section 50(1).

Sample vendor verification letter

Send this communication to clarification agencies to verify their corporate status before onboarding:

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Frequently asked questions

Last checked: 16 October 2026. Sources: CBIC Notification No. 29/2018-Central Tax (Rate), CBIC CGST Act Section 9, CBIC CGST Act Section 16, GSTN GSTR-3B User Manual.