Correct customer GSTIN does not guarantee correct tax type. Place of supply must be determined separately.
Quick View
Classify the service and apply the relevant IGST Act rule before selecting IGST or CGST-SGST.
Review contract and scope.
Contract.
Using billing address automatically.
Why It Matters
The general B2B rule often uses the registered recipient’s location, but many services follow specific rules for immovable property, performance, admission, events, transport, banking, insurance and intermediary activity.
Domestic and cross-border place-of-supply provisions are different. The same service description can produce a different result depending on whether supplier or recipient is outside India.
Place-of-supply mistakes can create tax paid under the wrong head, refund friction and customer ITC disputes.
Control Framework
| Area | What to establish | Operating rule |
|---|---|---|
| Parties | Supplier and actual recipient. | Identify contracting and consuming entity. |
| Service | General or specific-rule category. | Document classification. |
| Location | Registered address, fixed establishment or property. | Use evidence. |
| Tax type | Inter-state or intra-state result. | Validate state code. |
Action Checklist
- Review contract and scope.
- Identify service category.
- Determine supplier location.
- Determine recipient and place.
- Record tax-type conclusion.
- Validate invoice state and GSTIN.
Practical Example
Evidence to Keep
- Contract.
- Customer GST registration.
- Property or event records.
- Service-delivery evidence.
- Place-of-supply memo.
- Invoice and return reconciliation.
Warning Signs
- Using billing address automatically.
- Ignoring specific rules.
- Confusing recipient with payer.
- No fixed-establishment review.
- Applying domestic rule to exports.
Detailed Review
A defensible GST position must connect the commercial transaction, statutory rule, notification or circular, invoice, books, portal return and electronic ledger. A conclusion supported by only one layer is fragile.
Prepare an issue sheet that records GSTIN, period, tax head, amount, legal provision, effective date, evidence owner and approval. This is especially important where rates, thresholds or portal advisories changed during the year.
Reconcile by CGST, SGST, IGST and cess instead of only by total. An equal total can conceal tax paid to the wrong jurisdiction or credit recorded under the wrong registration.
Maintain original downloads and signed documents. Portal screenshots are useful context but should not replace JSON, returns, bills of entry, e-way bills, IRNs, ledgers, contracts and acknowledgements.
For judgemental matters, document competing interpretations and why one was selected. A short approval note created before filing is more credible than a justification written after a notice.
Product and customer master data should be locked to the approved tax position. Changes to HSN, SAC, rate, state code or place-of-supply logic should require controlled approval.
Review the exact effective date of every notification. Commercial announcements and GST Council recommendations do not replace an operative notification.
Transaction Test
Before filing, restate the transaction in one sentence using the legal parties, GST registrations, product or service, value, place, date and consideration. This often exposes hidden assumptions.
Test the result under an alternative fact: different customer GSTIN, delayed invoice, changed vehicle, partial vendor payment, exempt recipient or later cancellation. The control should explain why the tax outcome changes.
Create a gross-to-net bridge from commercial value to taxable value, tax, credit, payment and ledger effect. Avoid unexplained balancing figures.
Reconcile the counterparty’s likely records. Customer ITC, vendor GSTR-1, operator settlement, customs bill of entry and transport documents can contradict internal accounting.
Record the correction route before an error occurs: cancellation, credit note, amendment, reversal, re-availment, refund, DRC-03, representation or appeal.
Set a named owner, internal due date and evidence requirement for every exception.
Escalate material exposure before the statutory deadline rather than after portal rejection.
Escalation Route
Start with the commercial record, GST portal data and statutory working. Correct system or document errors through the prescribed process and retain the acknowledgement.
Where the matter is judgemental, disputed or enforcement-related, obtain a reasoned GST and legal review before payment, reply, refund, statement, appeal or restructuring.
Final Control
Management should record the financial exposure, cash-flow consequence, counterparty impact and statutory deadline for every unresolved GST issue. A tax difference can affect customer ITC, pricing, bank limits or business continuity even before an order is issued.
The control is complete only when the corrected invoice, portal filing, ledger entry, payment, refund, ruling, registration or authority communication is received and stored. An internal email saying that the issue is resolved is not closure evidence.
Common Questions
Is customer GSTIN enough?
No. Specific place-of-supply rules can override recipient location.
What is supplier location?
It can depend on the establishment most directly concerned with the supply.
Can wrong tax type be adjusted casually?
No. Wrong-head tax requires formal correction and refund analysis.
Should each service line be tested separately?
Yes, especially in bundled contracts.
Official Sources
- GST Council — GST flyers and topic explainers
- CBIC-GST — Circulars / Orders / Instructions
- GST Council official website
Use current Acts, Rules, notifications, circulars, advisories and transaction evidence. GST treatment can change by effective date, state, registration and facts.