Two refund routes — IGST vs accumulated ITC

For exporters, Section 16 of the IGST Act and Section 54 of the CGST Act create two refund pathways:

Route 1 — Pay IGST, claim refund (Rule 96)

The exporter treats the export as a taxable supply and pays IGST at the applicable rate. Refund of the IGST paid is claimed automatically through the shipping bill, which functions as a refund application under Rule 96. The CBIC system disburses the refund to the exporter's bank account, generally within 7-15 days of automated checks (where the GSTR-1 / GSTR-3B match and the shipping-bill data align).

Route 2 — Export under LUT / bond, refund accumulated ITC (Section 54(3)(i))

The exporter executes a Letter of Undertaking (or, where ineligible for LUT, a bond) and exports without payment of IGST. The unutilised input tax credit accumulated on inputs/services used for the exports is refundable as accumulated ITC under Section 54(3). Application is filed in Form GST RFD-01 within the limitation window. Disbursement timeline is typically 3-9 months due to officer scrutiny.

Choosing between the routes

Section 54(1) — the 2-year limitation, computed from the "relevant date"

Every refund claim must be filed within 2 years from the relevant date. The "relevant date" varies by category and is defined in the Explanation to Section 54:

• For goods exported by sea/air: Date the ship/aircraft leaves India;
• For goods exported by land: Date of crossing the frontier;
• For goods exported by post: Date of dispatch;
• For deemed exports: Date of payment;
• For services exported (where supply is completed prior to receipt of payment): Date of receipt of payment in convertible foreign exchange;
• For services exported (where payment received in advance): Date of issue of invoice;
• For inverted-duty refund: Due date for furnishing the return for the period in which the claim arose.

For service exports, the "date of receipt of consideration in convertible foreign exchange" is the most-litigated relevant date. Where the FIRC is delayed (because the foreign buyer's bank takes time to remit), the 2-year clock starts from FIRC date, not invoice date. This protects exporters from limitation traps caused by foreign-payment delays.

The Delhi HC ITC limitation jurisprudence

A separate limitation question that has occupied multiple High Courts: where ITC has been availed in a return filed years ago, is there a residual limitation barring its use in a refund claim filed later?

The Delhi High Court has held — in a series of rulings since 2023 — that once ITC is properly availed and reflected in the electronic credit ledger, the 2-year limitation under Section 54(1) governs only the refund application, not the underlying ITC entitlement. The credit balance does not "expire" so long as it has been validly availed within the time prescribed by Section 16(4).

This is significant for exporters whose accumulated ITC sits in the credit ledger across multiple years before a refund cycle is initiated. The Department's position in some matters has been to deny refund of ITC older than 2 years — the Delhi HC ruling rejects that interpretation.

Practitioner note: While the Delhi HC ruling is favourable, conservative practice is to file refund applications quarterly rather than letting ITC accumulate across multiple years. Quarterly cycles reduce limitation risk, reduce officer-scrutiny ammunition, and produce more predictable cash flows.

Inverted-duty refund — post-VKC Footsteps

Where the GST rate on inputs is higher than on outputs (typical in textiles, pharmaceuticals, agriculture, certain services), the resulting accumulation of unutilised ITC is refundable under Section 54(3)(ii). The mechanics are governed by Rule 89(5), which prescribes a formula:

Maximum Refund Amount = (Turnover of Inverted-Rated Supply × Net ITC ÷ Adjusted Total Turnover) − (tax payable on such inverted-rated supply)

The Supreme Court in Union of India v. VKC Footsteps India Pvt Ltd, (2022) 2 SCC 603 upheld the constitutional validity of Rule 89(5) but read it down — "Net ITC" includes only ITC on inputs, not on input services. This holding materially affected service-heavy refund claims in sectors like SaaS, BPO, and consulting export. Service-heavy exporters effectively lose refund of ITC on input services when seeking inverted-duty refund.

For exporters under LUT/bond route claiming Section 54(3)(i) refund of accumulated ITC, the position is different — Section 54(3)(i) covers ITC on both inputs and input services without the VKC Footsteps restriction.

Common refund-rejection grounds and how to defend

Refund applications get rejected on these recurring grounds. Defences:

• "GSTR-2A/2B does not match": Reconcile invoice-by-invoice; cite CBIC Circular 183/15/2022-GST allowing buyer to claim ITC despite vendor mismatch where buyer's diligence is documented.
• "Inverted-duty calculation differs": Re-run the Rule 89(5) formula with audited Turnover of Inverted-Rated Supply and Adjusted Total Turnover; submit working with cross-tagged returns.
• "FIRC not produced": Where FIRC is delayed by the foreign bank, submit alternate evidence (SWIFT message, BIRC, foreign bank's confirmation); cite RBI Master Direction on Export Realisation.
• "Limitation": Apply Section 54(1) "relevant date" rule — for service exports, FIRC date; for goods exports, departure date.
• "Risky exporter category": Where the system flags the exporter for additional verification, ensure submissions include: shipping bills, BRC/FIRC, GSTR-1 / 3B / 9, ITC reconciliation, vendor compliance, and audited financials.
• "Excess refund computation": Where the disbursed refund is less than claimed, apply for the differential through a fresh RFD-01 (do not let the difference lapse).

Interest on delayed refund

Section 56 of the CGST Act mandates payment of interest where refund is not paid within 60 days of complete application. The interest rate:

• 6% per annum for routine cases;
• 9% per annum where refund arises from an order of an appellate authority / tribunal / court that has attained finality.

Exporters whose refunds are pending beyond 60 days should compute interest using these rates and demand it explicitly in the refund application or via a follow-up. Where the Department refuses interest, the Article 226 writ remedy is well-settled.

Operational checklist for export refunds

Best-practice operating discipline:

1. Maintain a refund calendar — quarterly cycles for accumulated ITC; monthly for IGST route.
2. Reconcile GSTR-2A / 2B with purchase register monthly; flag mismatches for vendor follow-up immediately.
3. Track FIRC receipt timelines — chase the foreign buyer's bank where remittance is delayed beyond 90 days from invoice.
4. Audit shipping-bill / GSTR-1 alignment — IGST refund disbursement halts on alignment errors.
5. For inverted-duty refund, recalibrate Rule 89(5) formula post-VKC Footsteps — exclude input-service ITC from the Net ITC numerator.
6. For LUT route, renew the LUT annually before 1 April.
7. Where refund application exceeds ₹2 crore, maintain a CA-certified working for officer scrutiny.

For a broader view of GST litigation strategy, see our GST Litigation in India pillar guide.