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The correct GST refund route depends on what created the balance: IGST paid on an export of goods, unutilized input tax credit (ITC) from a zero-rated supply made under LUT or bond, ITC accumulated because input rates exceed output rates, or tax and other amounts paid in excess. Exporters of goods that paid IGST generally use the shipping-bill route under Rule 96. Most refunds of unutilized ITC, including LUT exports and inverted-duty claims, are filed in FORM GST RFD-01. Excess cash in the electronic cash ledger follows the refund mechanism under sections 54 and 49(6), while an admissible amount wrongly debited from the electronic credit ledger is normally re-credited through FORM GST PMT-03 rather than paid out as cash.
Choosing the wrong category can produce a rejected application, an incorrect formula or a data mismatch. The comparison below explains what is recovered, where it sits, how it is calculated, what evidence is required and which deadlines apply.
GST refund types at a glance
| Refund situation | What creates the claim | Ledger or tax involved | Normal route | Main risk |
|---|---|---|---|---|
| Export with IGST paid | IGST paid on a zero-rated export of goods | IGST paid in cash or through ITC | Shipping bill treated as the application under Rule 96 | Shipping-bill, manifest and return data must match |
| Export under LUT or bond | Unutilized ITC attributable to zero-rated exports made without payment of tax | Electronic credit ledger | FORM GST RFD-01 under Rule 89 | Net-ITC and turnover formula, with supporting schedules |
| Inverted duty structure | Input GST rate is higher than the rate on the relevant outward goods | Unutilized balance in the electronic credit ledger | FORM GST RFD-01 under Rule 89(5) | Only eligible inputs and the statutory cap can be used |
| Excess or erroneous payment | Cash left after dues, or tax paid wrongly or in excess | Electronic cash ledger, or credit ledger if wrongly debited | Refund under section 54 and section 49(6), or PMT-03 re-credit for an admissible credit-ledger amount | Proof of payment, relevant date and non-passing-on requirements |
Export refund when IGST was paid
How the shipping-bill route works
Exports are zero-rated supplies. For exported goods on which the exporter paid IGST, CGST Rule 96 treats the shipping bill as the refund application. It is not effective merely because a shipping bill was filed. The conveyance operator must first submit the departure export manifest or report, and the exporter must furnish a valid GSTR-3B for the relevant period. Customs can process the claim after those conditions are met and electronically credit the IGST paid for each eligible shipping bill to the exporter’s nominated bank account.
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The shipping-bill route is therefore a customs-linked refund, not a normal RFD-01 claim. The amount recovered is the IGST paid on the export transaction, rather than a formula-based share of accumulated ITC.
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Data that must reconcile
- Shipping-bill numbers, dates, ports and taxable values must correspond with the export details reported in GSTR-1.
- The IGST amount in the shipping bill and return data must be consistent with the tax actually paid in GSTR-3B.
- The export manifest or report must show that the goods departed.
- Bank-account details accepted for GST and customs credit must be current.
A mismatch between the shipping bill and GSTR-1 data can stop the electronic refund. Correct the return or shipping-bill information through the permitted amendment process before expecting customs to release the amount. Keep the commercial invoice, packing list, bill of lading or airway bill, shipping bill and export manifest evidence together in case the transaction is queried.
When this route is not the right one
If goods or services were exported without payment of IGST under a valid letter of undertaking (LUT) or bond, there is no IGST paid on the export for customs to return. The claim instead concerns unutilized ITC and is filed through RFD-01 under Rule 89. A shipping bill alone does not replace that application.
Export refund under LUT or bond
What is being refunded
An exporter using LUT or bond makes the zero-rated supply without paying IGST at export. The refund is the eligible ITC left unutilized in the electronic credit ledger and attributable to zero-rated turnover. This route covers the statutory formula for zero-rated supplies and is generally submitted for the relevant tax period, subject to the rules on permitted periods and documentation.
Rule 89 formula
The general formula is:
Refund amount = (Turnover of zero-rated supply of goods + turnover of zero-rated supply of services) × Net ITC ÷ Adjusted Total Turnover.
For this calculation, “Net ITC” means ITC availed on inputs and input services during the relevant period. “Adjusted Total Turnover” is determined under the rule and excludes exempt supplies as specified there. Use the figures for the same period and preserve a reconciliation to the returns and electronic credit ledger.
Illustrative calculation
Suppose an applicant has zero-rated turnover of 600,000, adjusted total turnover of 1,000,000 and eligible Net ITC of 120,000 for the claim period. The formula produces 72,000 (600,000 × 120,000 ÷ 1,000,000), before applying any other statutory adjustment or restriction that the proper officer must consider. This is an illustration of the arithmetic, not a determination that every input in a real claim is eligible.
Documents and controls
- Maintain export invoices, shipping or service-export evidence, LUT or bond records and proof of realization where applicable to the supply.
- Prepare an invoice-level schedule linking zero-rated turnover to GSTR-1 and the relevant return.
- Reconcile opening credit, ITC availed, utilization and closing balance with the electronic credit ledger.
- Separate eligible inputs and input services from blocked, ineligible or unrelated credits before computing Net ITC.
Refund for an inverted duty structure
When the inversion exists
An inverted-duty situation arises when the GST rate on inputs is higher than the GST rate on the relevant outward goods supply. The difference can leave eligible ITC accumulated even though the business is paying tax on its outward sales. The claim is not based simply on having a large credit balance; the credit must relate to the inverted-rated supply and satisfy the rule’s eligibility conditions.
Rule 89(5) cap
Rule 89(5) states:
Maximum refund amount = (Turnover of inverted-rated supply of goods × Net ITC ÷ Adjusted Total Turnover) − tax payable on the inverted-rated supply of goods.
The result is a maximum, not an automatic entitlement. The turnover, Net ITC, adjusted total turnover and tax payable must be calculated for the permitted period. The formula is specifically for inverted-rated outward goods; do not substitute export turnover or apply the zero-rated formula to this category. CBIC Circular 181/13/2022-GST discusses the amended Rule 89(5) formula. Check that circular together with the current rule text when preparing a claim, especially where the period spans an amendment.
Evidence and common errors
- Map each claimed input invoice to the inward supply, rate and credit entry in the electronic credit ledger.
- Identify the outward goods covered by the inverted rate and reconcile their turnover and tax payable to GSTR-1 and GSTR-3B.
- Exclude credits that do not fall within the rule’s eligible-input treatment or that relate to other business activities.
- Do not claim the entire closing credit balance when the formula produces a lower cap.
File the claim in RFD-01 with the prescribed statements and invoice or ledger evidence. A calculation that ignores the tax-payable subtraction, uses the wrong period or mixes services with the inverted-rated goods can be reduced or rejected during scrutiny.
Refund of excess or erroneous GST payment
Unutilized cash in the electronic cash ledger
Section 54(1) allows a person claiming refund of tax, interest or another amount paid to apply within two years from the relevant date, subject to the category-specific relevant-date rules. Section 49(6) supplies the mechanism for refunding a qualifying balance in the electronic cash ledger. The balance must remain after tax dues and other amounts payable under the CGST Act and its rules have been discharged.
CBIC Circular No. 166/22/2021-GST states: “Any amount, which remains unutilized in electronic cash ledger, after discharge of tax dues and other dues payable under CGST Act and rules made thereunder, can be refunded to the registered person as excess balance in electronic cash ledger.” This is a cash-ledger refund: it is not the same as claiming accumulated ITC under an export or inverted-duty formula.
Tax wrongly or excessively debited from the credit ledger
When the disputed amount was debited from the electronic credit ledger rather than paid in cash, the operational remedy is different. Under Rule 86, an admissible amount is re-credited by the proper officer through FORM GST PMT-03. PMT-03 restores the eligible credit to the ledger; it does not create a bank-account cash refund of accumulated ITC. Preserve the original debit entry, return, payment record and officer’s order so the amount and the reason for re-credit can be verified.
What to prove
- The exact payment, debit or challan that created the excess.
- Why the amount was paid in error or remained unutilized after all dues were discharged.
- That the claim is within the applicable two-year period measured from the relevant date.
- That the incidence of tax has not been passed on where the law requires a non-passing-on showing or certificate.
How to choose and file the correct route
- Identify the trigger. Classify the transaction as an IGST-paid export of goods, a zero-rated export without tax under LUT or bond, an inverted-rated outward supply of goods, or an excess or erroneous payment.
- Locate the amount. Determine whether the money is IGST linked to customs export data, unutilized credit in the electronic credit ledger, or cash in the electronic cash ledger. A wrongly debited credit amount may require PMT-03 re-credit.
- Select the application path. Use the shipping-bill mechanism for Rule 96 IGST-paid goods exports; use RFD-01 for LUT-export and inverted-duty ITC refunds and for other categories that require that form; use the return or cash-ledger mechanism where section 54 and section 49(6) permit it.
- Reconcile before submission. Match invoices, GSTR-1, GSTR-3B, shipping bills, export reports, ITC entries, cash-ledger transactions and bank details. Resolve differences before filing rather than relying on an officer to correct them.
- Prepare category-specific evidence. Apply the correct formula, attach the required statements and documents, and include a non-passing-on certificate or other unjust-enrichment evidence where Rule 89 requires it for the claim.
- Submit and monitor acknowledgement. For a non-cash-ledger RFD-01 claim, the proper officer scrutinizes completeness within 15 days. A complete application receives FORM GST RFD-02; deficiencies are communicated in FORM GST RFD-03. Respond to a deficiency notice with corrected data and documents rather than filing an unrelated second claim.
- Track the ledger outcome. Monitor the bank credit for an approved cash refund, the electronic credit ledger for a PMT-03 re-credit, and any debit or adjustment made while the claim is processed.
Evidence, unjust enrichment and scrutiny
Rule 89 requires evidence appropriate to the category. Export claims need a clear link between invoices, shipping or service-export records and the return. Inverted-duty claims need rate and invoice classification showing why the input rate exceeds the outward-goods rate. Excess-payment claims need payment and ledger extracts that identify the precise overpayment. Generic statements that a balance is “available” are weaker than an invoice-level reconciliation.
The non-passing-on principle matters because a refund should not give a supplier an unintended benefit when the tax incidence was recovered from another person. Where the rules prescribe a certificate or declaration above the applicable threshold, obtain it in the required form and retain the working papers supporting it. The threshold and documentary form should be checked against the rule in force for the claim period.
Deadlines and period controls
The general section 54(1) window is two years from the relevant date. The relevant date is not identical for every category, so calculate it using the provision that applies to the particular export, payment or other event. Do not treat the two-year period as permission to postpone reconciliation: export data can become harder to amend, and ledger records must remain traceable to the period claimed.
For formula-based claims, use a period permitted by the rules and apply one consistent set of turnover, ITC and tax-payable figures. If an amendment to Rule 89(5) affects the period, document which version of the rule supports the calculation and review CBIC Circular 181/13/2022-GST alongside the current statutory text.
Quick Recap
Practical decision checklist
- Goods exported with IGST paid? Start with the shipping bill, export manifest and GSTR-3B/GSTR-1 reconciliation under Rule 96.
- Goods or services exported under LUT or bond? Calculate the zero-rated turnover and Net-ITC formula and file RFD-01 under Rule 89.
- Input rate higher than output rate on outward goods? Test the Rule 89(5) cap, eligible inputs and tax-payable subtraction before filing RFD-01.
- Cash left after paying dues? Use the section 54 and section 49(6) cash-ledger refund route and prove the balance.
- Tax wrongly debited from credit? Seek the admissible Rule 86 re-credit through PMT-03, not a cash refund of accumulated ITC.
- Any mismatch or passed-on incidence? Correct the data and prepare the required non-passing-on evidence before submission.
How the three principal calculations differ
| Question | IGST-paid export | LUT export | Inverted duty | Excess payment |
|---|---|---|---|---|
| What is recovered? | IGST paid on eligible exported goods | Unutilized ITC attributable to zero-rated turnover | Eligible accumulated ITC subject to Rule 89(5) | Cash balance or a specifically identified erroneous payment |
| How is it calculated? | IGST reported for each matched shipping bill | Zero-rated turnover × Net ITC ÷ adjusted total turnover | (Inverted-rated turnover × Net ITC ÷ adjusted total turnover) − tax payable | Amount proved as unutilized or paid in excess |
| Where is the claim processed? | Customs-linked electronic credit to bank | GST refund application in RFD-01 | GST refund application in RFD-01 | Cash-ledger refund or PMT-03 credit-ledger re-credit |
| Most important evidence | Shipping bill, manifest and matching returns | Export records, LUT or bond, invoices and ITC schedule | Input and output rates, invoices, ledger and formula schedule | Payment proof, ledger extract, relevant date and non-passing-on evidence where required |
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