How does an inverted duty structure refund work?
What an inverted duty structure is under GST, how the accumulated input tax credit refund is claimed under section 54, the formula and the two-year time limit, and why input services and capital goods are outside the refund.
In this guide
An inverted duty structure is where the GST rate on inputs is higher than the rate on the output supply, so input tax credit builds up. Section 54(3) of the CGST Act lets a registered person claim a refund of that accumulated credit, computed by a formula in rule 89(5) that covers credit on input goods but not input services or capital goods. The claim is filed in Form GST RFD-01 within two years from the due date for furnishing the return for the period.
What is an inverted duty structure?
An inverted duty structure is where the GST rate on what a business buys is higher than the rate on what it sells. Because the tax paid on inputs runs ahead of the tax collected on outputs, input tax credit accumulates in the electronic credit ledger and cannot be fully set off.
The refund exists to release that trapped credit. Section 54 of the CGST Act, read with rule 89, lets the registered person claim back the accumulated credit rather than carry it indefinitely.
Who can claim the refund?
A registered person whose credit has accumulated because the input rate is higher than the output rate can claim under section 54(3). The output supply must be taxable; the refund is not available where the output is nil-rated or fully exempt.
Some supplies are notified as not eligible for the inverted refund even when the structure is inverted, so the notified list has to be checked for the specific goods or services before assuming the refund is available.
How is the refund amount computed?
Rule 89(5) fixes the maximum refund. It is the turnover of the inverted-rated supply, multiplied by net input tax credit, divided by the adjusted total turnover, reduced by the output tax payable on that inverted supply.
| Element | What it means |
|---|---|
| Turnover of inverted-rated supply | Value of the lower-rated output supply in the period |
| Net input tax credit | Credit availed on input goods in the period |
| Adjusted total turnover | Total turnover less exempt and certain other supplies |
| Less: output tax on inverted supply | Tax payable on that supply, reduced from the result |
The formula also proportionately reduces the amount for credit on input services, which is how services are kept out of the refund even though they enter the turnover figures.
Why are input services excluded?
The refund covers input tax credit on input goods, not on input services or capital goods. The rule 89(5) formula defines net input tax credit as credit on inputs, and courts have upheld that services stay outside the inverted duty refund.
The practical effect is that a business with a large share of service inputs recovers less than its full accumulated credit. The trapped credit that comes from service tax at a higher rate is not released through this route.
What is the time limit to claim?
Two years from the due date for furnishing the return for the period in which the claim arises, under section 54. A claim filed after two years is time-barred, so each period's accumulated credit carries its own deadline.
Because the clock runs period by period, a business claiming for several months should watch the earliest period first. Waiting until the whole credit looks worth claiming can push the oldest months past the limit.
How do I file the refund claim?
- Confirm the structure is inverted under section 54(3) and the output is not exempt.
- Check the goods or services are not on the notified ineligible list.
- Compute the maximum refund using the rule 89(5) formula.
- File Form GST RFD-01 for the period within the two-year limit.
- Respond to any RFD-08 clarification and track the RFD-06 sanction.
Why do inverted refunds get rejected?
- Including credit on input services or capital goods in the claim.
- Claiming on an output that is nil-rated or fully exempt.
- Filing after the two-year limit for the relevant period.
- Ignoring the notified list of supplies barred from the inverted refund.
- Computing the amount without reducing it by the output tax on the inverted supply.
Where are refund rules published?
The refund framework sits in section 54 of the CGST Act and rule 89 of the CGST Rules, with CBIC circulars clarifying the formula and the notified restrictions. For the general refund position, read our GST refund guide, and for the credit rules behind the accumulation, our GST blocked credits guide. Complied AI keeps CBIC / GST updates in one feed so you can open the circular behind a refund change and read section 54 next to it.
Practical checks
Common questions
What is an inverted duty structure under GST?
An inverted duty structure is where the rate of tax on inputs is higher than the rate of tax on the output supply. Because more tax is paid on purchases than is collected on sales, input tax credit accumulates and cannot be fully used against output tax, so it builds up in the credit ledger.
Can I claim a refund of accumulated credit from inverted duty?
Yes. Section 54(3) of the CGST Act allows a refund of unutilised input tax credit where credit has accumulated because the rate of tax on inputs is higher than the rate on output supplies, other than nil-rated or fully exempt supplies. Some supplies are notified as not eligible even where inverted, so the notified restrictions must be checked.
How is the inverted duty refund amount computed?
Rule 89(5) of the CGST Rules sets the formula. The maximum refund equals turnover of the inverted-rated supply multiplied by net input tax credit divided by adjusted total turnover, less the output tax payable on that inverted supply. Net input tax credit here is the credit on input goods, and the formula also reduces it by credit on input services proportionately.
Are input services and capital goods refundable in an inverted claim?
No. The refund under the rule 89(5) formula covers input tax credit on input goods. Credit on input services and on capital goods is not refundable under the inverted duty structure, so a business with heavy service inputs recovers less than its total accumulated credit suggests.
What is the time limit to claim an inverted duty refund?
Two years from the due date for furnishing the return for the period in which the claim arises, under section 54. A claim filed after that period is time-barred, so the two-year clock from the relevant tax period is the deadline to track for each period's accumulated credit.
Which form is used for a GST refund claim?
Form GST RFD-01, filed on the GST portal. The officer issues an acknowledgement in RFD-02, may seek clarification in RFD-08 and RFD-09, and sanctions the refund in RFD-06 with payment advice in RFD-05. So the whole refund runs through the RFD series of forms.
Can I claim an inverted refund if my output is exempt?
No. Section 54(3) excludes the refund where the output supply is nil-rated or fully exempt. The inverted duty refund is for a taxable output taxed at a lower rate than the inputs, not for an exempt output, so an exempt-output business does not get the accumulated-credit refund on this ground.
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How this guide was prepared
This guide is published by the Complied AI research desk. Its source list and stated position were checked against the official records shown below on 16 September 2026.
Automation, including AI, may assist research, drafting and structure. It does not replace the official record or amount to an independent professional review. Read our editorial standards and corrections policy.
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