Browser-only • No login • Cash-ledger first (RCM)

GST RCM Calculator (Reverse Charge Mechanism)

Estimate GST payable under RCM and understand the typical workflow: pay via cash ledger, report in returns, then claim eligible ITC (subject to conditions).

Last reviewed: Jan 26, 2026 • Always verify latest notifications and your invoice terms.

RCM calculator

Enter taxable value + GST rate to estimate liability. Use as an estimate and confirm applicability from invoice + notification.

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Cash-first rule

In common practice, RCM is discharged via cash ledger. Use this as an estimate and confirm with your advisor.

Filing pointers

Quick references for GSTR-3B tables are included below for reporting.

Verify applicability

RCM depends on category/conditions. Always verify using invoice terms and latest notifications.

How RCM works (simple explanation)

Reverse Charge means the recipient pays GST directly for notified supplies/conditions. Practically: compute → pay in cash → report → claim eligible ITC after payment (if allowed).

Typical RCM flow
  1. Check if the supply is covered under RCM and conditions apply.
  2. Compute GST on taxable value (rate depends on category).
  3. Pay RCM liability (commonly via cash ledger) while filing.
  4. Report the liability; claim eligible ITC after payment (if allowed).

If you’re unsure about IGST vs CGST/SGST, use Place of Supply Finder.

Common confusion to avoid
  • RCM is not “every unregistered purchase”—it’s specific to notified categories/conditions.
  • IGST vs CGST/SGST can change outcomes (place of supply matters).
  • ITC eligibility depends on restrictions and usage. Verify before assuming “full credit”.

Quick filing pointers (GSTR-3B)

Use this as a filing reference while preparing GSTR-3B. Portal labels can change—verify inside the filing screen.

RCM liability (tax payable)
GSTR-3B: Table 3.1(d)
Eligible ITC on RCM (if allowed)
GSTR-3B: Table 4(A)(3)

Common RCM categories (quick reference)

Practical reference list (not exhaustive). RCM depends on conditions and changes with notifications—verify using the latest rules and your invoice.

View common categories list8 items
Tip: “Tax payable on reverse charge” on invoice is a strong signal—then verify category + conditions.
CategoryTypically paysNotes
GTA (Goods Transport Agency) – certain casesRecipient (RCM) in common scenariosRate/option depends on conditions and whether supplier opts for forward charge; verify invoice and option used.
Legal services by advocate/firmRecipient (RCM) (common case)Applies for business recipients in many practical cases; confirm applicability for your situation.
Director’s remuneration (company pays)Company (RCM) (commonly treated)Classification depends on facts; consult your CA for edge cases and payroll structures.
Sponsorship servicesRecipient (RCM) (commonly)Often RCM for specified recipients; verify current notification.
Security services (manpower) – specified recipientsRecipient (RCM) in specified casesHas exemptions/conditions; verify supplier registration and recipient category.
Renting of motor vehicle (specified cases)Recipient (RCM) in specified casesConditions vary; check invoice and option selected.
Import of servicesRecipient (RCM)Often reported separately; confirm valuation, place of supply and eligibility.
Any other notified categoryAs per notificationRCM list changes over time—always verify latest notification and invoice wording.

RCM checklist (quick self-check)

Use this checklist before paying RCM and before claiming ITC.

  • Confirm the supply is covered under RCM and your case meets conditions.
  • Check invoice terms (forward charge option vs RCM) and supplier status.
  • Decide whether IGST or CGST+SGST applies (place of supply).
  • Pay RCM liability (commonly via cash ledger) within your return workflow.
  • Claim ITC only if eligible and after payment (as per your filing method/advisor).
  • Maintain supporting documents and internal notes for audit readiness.

Frequently asked questions

Quick answers to common RCM confusion points.

Is GST under RCM payable in cash, or can I use ITC?
Commonly, RCM tax is discharged using the electronic cash ledger (cash). Many practical guides caution that ITC cannot be used to pay RCM tax directly. After paying (and if eligible), you may claim ITC of that tax in your return period. Always verify the latest rules/conditions with your advisor.
When can I claim ITC on RCM?
In practice, businesses usually claim eligible ITC in the return period in which RCM tax is paid in cash (subject to eligibility and restrictions). If unsure, follow your CA’s filing method and match it with your books + portal drafts.
Where do I report RCM in GSTR-3B?
RCM liability is commonly reported under Table 3.1(d) (inward supplies liable to reverse charge). Eligible ITC related to RCM is typically reflected in Table 4(A)(3) (inward supplies liable to reverse charge). Portal labels may vary—verify while filing.
Does RCM apply to every unregistered supplier purchase?
Not necessarily. RCM is driven by specific notified categories and conditions (and some special cases). Always check the category, invoice wording, supplier status, and your own recipient status.
RCM on GTA: 5% vs 12% — which one should I use?
GTA can be nuanced because the supplier may opt for forward charge at a higher rate under conditions. Your liability depends on the option chosen and invoice terms. Use this calculator to estimate, but confirm using the invoice + supplier declaration/option.
Do I need a self-invoice / payment voucher for RCM?
Record-keeping requirements can depend on the scenario and your compliance process. Many businesses maintain internal vouchers/entries to support audit trail. Follow your CA’s SOP and keep invoice + payment proof.
How do I decide IGST vs CGST/SGST for RCM?
It depends on place of supply + location of supplier/recipient. If you’re unsure, verify your invoice and use a place-of-supply helper. Wrong split can cause mismatches.
What happens if I miss paying RCM on time?
Delays can trigger interest/late fee implications depending on return/payment timelines. If you missed payment, compute interest (if applicable), pay promptly, and correct reporting in returns. Consult your CA for the cleanest correction path.

Accuracy & sources

This page provides estimates + practical guidance. Always verify latest rules and invoice conditions.

This page provides an estimate-oriented calculator and practical guidance based on common GST filing flows. RCM applicability and reporting can change with notifications, clarifications, and portal label updates. Always verify the latest rules and your invoice terms.

Reference: GST Portal help pages cover GSTR-3B sections including inward supplies liable to reverse charge. Use as a reference while filing.