"Exports are zero-rated, so the refund is automatic": what Rule 89 actually requires

Ask most exporters how GST refunds work and you will hear a version of this: "Exports are zero-rated, so whatever GST I paid on inputs comes back to me automatically." It does not. Zero-rating under Section 16 of the IGST Act 2017 only establishes that the outward supply carries no tax and that input tax credit is not blocked. Getting the money out of the electronic credit ledger and into your bank account is a separate, documented, time-barred application under Rule 89 of the CGST Rules 2017 — and a large share of export refund claims are rejected or reduced not because the exporter was ineligible, but because the paperwork or the clock failed.

What the law actually says

Section 16, IGST Act 2017 treats export of goods or services, and supplies to an SEZ developer or unit, as zero-rated supply. Section 16(3) gives the exporter two mutually exclusive routes:

• Route A — with payment of IGST. You pay IGST on the export invoice, and the shipping bill itself is deemed to be the refund application under Rule 96 of the CGST Rules 2017. Refund is processed by Customs (ICEGATE) once GSTR-1 Table 6A and GSTR-3B data match the shipping bill and EGM.
• Route B — under LUT or bond, without payment of IGST. No tax is charged on the export invoice. The unutilised input tax credit accumulates in the electronic credit ledger, and you claim it back by filing Form GST RFD-01 under Rule 89.

This article is about Route B, which is what most services exporters and the majority of goods exporters use.

Rule 96A governs the Letter of Undertaking. An LUT is furnished in Form GST RFD-11 and is valid for one financial year only — it expires on 31 March. If you export before filing a fresh LUT for the new financial year, the export is treated as a supply with tax payable, and interest at 18% per annum runs from the date of the invoice. Filing the LUT is free, takes ten minutes on the GST portal, and is the single most common avoidable failure in this entire process.

Rule 89(4) prescribes the formula for refund of accumulated ITC on zero-rated supply:

Refund Amount = (Turnover of zero-rated supply of goods + Turnover of zero-rated supply of services) × Net ITC ÷ Adjusted Total Turnover

Three definitions inside that formula do most of the damage:

• Net ITC means input tax credit availed on inputs and input services during the relevant period. Credit on capital goods is excluded — a point that surprises exporters who bought machinery in the claim period.
• Turnover of zero-rated supply of goods is capped at 1.5 times the value of like goods domestically supplied by the same or a similarly placed supplier, under the explanation to Rule 89(4). If you have no domestic sales, the department will look for comparables.
• Turnover of zero-rated supply of services under Rule 89(4)(D) counts only payments received in convertible foreign exchange (or in INR where the RBI permits) during the relevant period, plus advances received earlier for services completed in the period, minus advances for services not yet completed. Invoiced-but-unrealised export service revenue does not enter the numerator.

Section 54(1) of the CGST Act 2017 sets the time limit: an application for refund must be made before the expiry of two years from the relevant date. For export of goods under Rule 89, the relevant date is the date on which the ship or aircraft leaves India, or the date the goods pass the customs frontier by land, or the date of dispatch by post. For export of services, the relevant date is the date of receipt of convertible foreign exchange, or the date of issue of the invoice — whichever is later.

Section 54(6) read with Rule 91 provides for a provisional refund of 90% of the claim within seven days of acknowledgement, with the balance after scrutiny. In practice provisional sanction is withheld where the claimant has been flagged as risky.

Practical implications for exporters

The FIRC/BRC problem for service exporters. A software or consulting firm invoicing a US client in March and receiving payment in June cannot include that invoice in the March quarter refund. The turnover enters the formula for the period in which the foreign exchange is received. Exporters who file refunds strictly by invoice date routinely understate one period and overstate another, and the department disallows both.

The invoice-locking change. Since the refund module moved from tax-period-based to invoice-level filing, each export invoice used in a refund application is locked and cannot be reused in a later application. If you file a claim omitting three invoices, you cannot simply add them to next quarter's claim covering a later period — you have to file a fresh application for the correct period, and if that period is more than two years old, you have lost the money.

Capital goods credit is stranded. An exporter who imports a ₹2 crore machine and pays ₹36 lakh IGST cannot recover that through Rule 89(4). It sits in the credit ledger until domestic output tax absorbs it. For a 100% exporter with no domestic sales, that credit may never be usable — which is why the EPCG route or IGCR exemption is often the better commercial decision at the procurement stage, not after.

The 1.5x cap bites hardest on new exporters. A manufacturer whose entire output is exported at ₹1,000 per unit but who sells a small domestic quantity at ₹500 will find zero-rated turnover restricted to ₹750 per unit for the refund formula. The remaining credit is not lost, but it is deferred indefinitely.

Realisation within nine months. Separate from GST, FEMA Notification 23(R) requires export proceeds to be realised within nine months. If realisation fails after a refund has been sanctioned under LUT, Rule 96B requires the exporter to deposit the refund back with interest within thirty days of the expiry of the RBI-permitted period. GST refund and FEMA realisation are two clocks running on the same shipment.

Step-by-step: what to do

• File Form GST RFD-11 (LUT) before your first export invoice of the financial year. Portal path: Services → User Services → Furnish Letter of Undertaking. Two independent witnesses with addresses are required. Do this in the first week of April, every April.
• Reconcile before you claim. GSTR-1 Table 6A (export invoices), GSTR-3B Table 3.1(b) (zero-rated outward supply), the shipping bills on ICEGATE, and the e-invoice IRNs must all agree on invoice number, date, and value. A single digit mismatch in a shipping bill number stalls the claim.
• Compute Net ITC correctly. Take total ITC availed in GSTR-3B for the period, remove credit on capital goods, remove any credit blocked under Section 17(5), and remove ITC reversed under Rule 42/43. What remains is Net ITC.
• Determine the correct relevant date and confirm you are inside two years. For services, track the date of receipt of foreign exchange per FIRC. For goods, use the EGM date, not the invoice or shipping bill date.
• File Form GST RFD-01 selecting "Refund of ITC on export of goods & services without payment of tax". Enter invoice-level details. Upload: the statement in Statement 3 (goods) or Statement 3A, a copy of the LUT acknowledgement (ARN), shipping bills and EGM proof for goods, and FIRCs or BRCs for services. Attach a self-declaration under the second proviso to Section 54(8) that the incidence of tax has not been passed on where the claim is under ₹2 lakh; a CA or Cost Accountant certificate is required where the claim exceeds ₹2 lakh, under Rule 89(2)(m).
• Watch the acknowledgement. The officer must issue Form GST RFD-02 (acknowledgement) or RFD-03 (deficiency memo) within fifteen days. A deficiency memo means the application is treated as never filed — you must file afresh, and the two-year clock keeps running. Respond to deficiency memos the same week, not the same month.
• Track provisional sanction. Form GST RFD-04 sanctions 90% provisionally; RFD-06 is the final sanction order; RFD-05 is the payment advice. If sanction is delayed beyond sixty days from the date of a complete application, interest at 6% per annum under Section 56 is payable to you — claim it, it is not paid automatically.

FAQ

Can I switch between the IGST-payment route and the LUT route mid-year?
Yes. There is no lock-in between Rule 96 and Rule 89. But you cannot apply both routes to the same shipment, and once an invoice has been reported as a zero-rated supply with payment of tax in GSTR-1 and GSTR-3B, amending it to the LUT route requires a credit note and re-invoicing, not just a refund application.

My refund was rejected on a deficiency memo. Does the two-year limit reset?
No. Rule 90(3) requires you to file a fresh application after a deficiency memo, and the fresh application must still be within two years of the original relevant date. The time between the first filing and the deficiency memo is excluded from the two years, but the underlying deadline does not restart. Treat a deficiency memo as urgent.

I export services and receive payment in INR from a Nepal client. Is that a zero-rated export?
No. Section 2(6) of the IGST Act requires payment in convertible foreign exchange, or in Indian rupees only where the RBI specifically permits it for that transaction. Payment in INR from a Nepalese or Bhutanese buyer for services generally fails the export-of-services test, making the supply taxable domestically and the refund unavailable.

Do I need a CA certificate for every refund claim?
No. Under Rule 89(2)(m) the CA or Cost Accountant certificate is required only where the refund claimed exceeds ₹2 lakh. Below that, a self-declaration that the tax incidence has not been passed on is sufficient. Note that the unjust-enrichment declaration is about the incidence of tax, not about whether you profited from the export.

For your specific situation

Export refunds fail on details — an expired LUT, a FIRC dated one quarter late, capital goods credit wrongly included in Net ITC, a deficiency memo answered too slowly. Each of those is fixable before filing and expensive afterwards.

For your specific situation, book a consultation at harunraaj.com.

Need help with this?

Our team handles the paperwork. You focus on your business.