Can a GST refund exceed export turnover? A worked calculation

Yes. A refund of unutilised ITC on service exports under LUT can exceed the export turnover. The turnover determines the export proportion applied to eligible Net ITC. It does not itself set a rupee ceiling on the refund.

That conclusion follows from the Rule 89(4) formula below. The credit must still qualify, belong in the relevant-period calculation and satisfy the credit-ledger limits. This guide covers exports of services without payment of tax, using fictional figures throughout.

What is the formula?

For a business supplying only services:

Maximum refund = zero-rated service turnover × Net ITC ÷ adjusted total turnover

Use the statutory figures:

• Zero-rated service turnover: payments received during the claim period for those exports, plus earlier advance amounts applied to services completed in this period, minus current-period advances already included in those receipts for services still incomplete at period-end.
• Adjusted total turnover: that zero-rated service turnover plus non-zero-rated service turnover, excluding exempt supplies other than zero-rated supplies. For a simple business with exports and taxable domestic services, both belong in the denominator.
• Net ITC: eligible credit availed on inputs and input services during the claim period, after applicable reversals. Capital-goods credit and an opening ledger balance are not additions to this figure.

These definitions come from Rule 89(4). Read the older compilation with Notification 20/2024–Central Tax, clause 9, which removed the references to the former special routes in sub-rules 4A/4B.

Use an invoice-and-receipt schedule to establish service turnover. The invoice total alone will not always equal it, especially with advances or receipts spanning periods.

Separate advance example: current receipts of ₹9,000 comprise a ₹6,000 final payment for completed work and a ₹3,000 advance for unfinished work. Earlier advances of ₹4,000 also relate to the completed work. Service turnover is ₹9,000 + ₹4,000 − ₹3,000 = ₹10,000. Do not add the completed invoice’s full value again.

Example: ₹20,000 turnover and a ₹27,000 refund

Assume an April–June 2026 claim with two service-export invoices of ₹12,000 and ₹8,000. Both services were completed and fully paid during the quarter, with qualifying bank evidence. There are no advances, domestic sales, exempt supplies or previous claims involving these records.

The following fictional business purchases have eligible ITC availed during the quarter. The imported-service reverse-charge tax has been properly discharged, and there are no other reversals.

Credit source	Normal eligible ITC	Included in refund Net ITC
Google advertising, billed by an Indian GST entity	₹14,400	₹14,400
Meta advertising, billed by an Indian GST entity	₹9,000	₹9,000
Reddit advertising treated as imported services, with RCM paid	₹3,600	₹3,600
Business inverter classified as capital goods	₹9,000	₹0
Total	₹36,000	₹27,000

The brand names do not determine eligibility: the actual supplier, invoice, business use and tax treatment do. See the Annexure B worked example for these purchase categories and capital-goods treatment for the inverter exclusion.

The calculation is:

₹20,000 × ₹27,000 ÷ ₹20,000 = ₹27,000

All adjusted turnover is export turnover, so the export proportion is 100%. High business expenditure and modest sales can therefore produce eligible input tax exceeding revenue. The calculation does not create extra credit: ₹27,000 was already availed as qualifying ITC.

Check both credit-ledger limits

The formula is one ceiling. Paragraph 37 of Circular 125 requires the lowest of the formula amount, the credit-ledger balance at the end of the claim period after filing its GSTR-3B, and the balance when filing the refund.

Limit in this example	Amount
Rule 89(4) formula	₹27,000
Claim-period-end credit balance, after GSTR-3B	₹36,000
Credit balance at refund filing	₹34,000
Refund claim supported by these limits	₹27,000

If the filing-date balance were ₹22,000, the refund would be capped at ₹22,000. If the period-end balance were ₹19,000, that would cap it even if later credits increased the balance. Neither balance enlarges Net ITC.

These figures combine IGST, CGST and SGST/UTGST. Compensation cess must be calculated separately and debited from its own balance. Circular 125/44/2019-GST, paragraphs 37 and 39.

Check the tax heads as well as the aggregate. For example, the ₹34,000 filing balance could comprise ₹27,000 IGST, ₹3,500 CGST and ₹3,500 SGST. The ₹27,000 refund can then be allocated entirely to IGST. The current portal applies the debit order and available balances; no head can carry more than its filing-date credit. Do not type ₹27,000 under IGST if that head has insufficient balance merely because the aggregate is large enough. GST portal: eligible-refund allocation.

What changes if I also have domestic sales?

Suppose the same Net ITC of ₹27,000 accompanies ₹20,000 exports and ₹30,000 taxable domestic service turnover, with no other supplies or adjustments:

₹20,000 ÷ ₹50,000 = 40%; maximum refund = 40% × ₹27,000 = ₹10,800.

Apply both ledger limits again. Domestic output-tax payments may have reduced the available balance.

Do not calculate the LUT refund as 18% × export turnover. That would produce ₹3,600 on ₹20,000, but Rule 89(4) does not use that calculation. Here the claim concerns accumulated purchase credit; no output IGST was paid on the LUT exports.

The portal puts this working in Statement 3A, then checks the refundable amount against the ledgers. Review any auto-populated Net ITC before accepting it. GST portal: refund computation.

How should I explain a claim larger than turnover?

Attach a short computation note with the turnover reconciliation, BRC/FIRC mapping, Annexure B-to-Net-ITC reconciliation, capital-goods exclusion and both ledger balances. Adapt this fictional wording:

This claim is for unutilised ITC on service exports without payment of tax under LUT. Zero-rated service turnover and adjusted total turnover are each ₹20,000. Eligible Net ITC for April–June 2026 is ₹27,000, excluding ₹9,000 of capital-goods credit. Rule 89(4) therefore gives ₹20,000 × ₹27,000 ÷ ₹20,000 = ₹27,000. This is below both applicable ledger balances of ₹36,000 and ₹34,000. The claim exceeds turnover because qualifying period ITC exceeds turnover; the attached schedules support each figure.

If a communication has already arrived, address its actual grounds:

• RFD-03 deficiency memo: rectify the deficiencies and file a fresh refund application, checking the applicable limitation position. Rule 90(3).
• RFD-08 proposed rejection: respond electronically in RFD-09, ordinarily within 15 days of receipt, with the calculation and evidence. Rule 92(3).

The arithmetic answers the turnover objection; it does not decide other eligibility issues raised in the case. Use the complete refund-claim guide to place this calculation alongside the rest of the application.