Inverted Duty Refund explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.
A formulation plant buys APIs, excipients, solvents, blister foil and cartons, and sells finished medicines. When the GST on those inputs is higher than the GST on the medicine, credit keeps piling up in the ledger month after month. That credit is refundable as an inverted duty refund, and the GST 2.0 rate cuts of 22 September 2025 have pushed many more pharma businesses into this position.
A pharma manufacturer can claim refund of accumulated credit under section 54(3)(ii) of the CGST Act in FORM GST RFD-01, using the Rule 89(5) formula. Only credit on input goods (APIs, excipients, packing material) counts as Net ITC. Input services and capital goods are excluded. Medicines that are nil-rated or fully exempt do not qualify. GST rates on drugs and formulations were reduced with effect from 22.09.2025, so check the current rate for each HSN before you model a claim.
Why credit piles up in pharma
Pharma has a long bill of materials. A single tablet can carry credit from a dozen inputs, and several of them may be taxed above the rate on the finished product.
| Input group | Examples | Why it matters |
|---|---|---|
| Active ingredients | APIs, intermediates | Often the largest credit line |
| Excipients and chemicals | Binders, solvents, coating agents | Many are general chemicals taxed at the standard rate |
| Primary packing | Blister foil, PVC film, bottles, caps | Packing is a classic high-rate input |
| Secondary packing | Cartons, labels, leaflets, shippers | Same as above |
| Not in Net ITC | Testing and lab services, contract manufacturing charges, freight, plant and machinery | Input services and capital goods are excluded |
The legal test is simple. Is credit accumulating because the rate on inputs is higher than the rate on the output? If the answer is yes for a sustained period, you have a refund claim. If the ledger builds up only because of a one-off purchase of machinery, you do not.
GST 2.0. The ICAI background material records that the NPPA directed manufacturers to pass on the reduction in GST rates on drugs and formulations, including medical devices, from 22.09.2025, and to revise MRPs. We have not quoted specific rates here because they differ by HSN. Take your current rate for each product from the rate schedule, and do the same for each input. Where inputs stayed at the standard rate while the output rate came down, inversion is likely.
If your ledger has been growing since the rate change and you want the working checked before filing, our inverted duty structure refund service starts with an HSN-level rate map of inputs and outputs.
Worked example: a formulation unit
Illustration (one quarter, round figures; rates are illustrative, say most inputs at 18% and the medicine at 5%):
| Item | Amount (₹) |
|---|---|
| Turnover of medicines (inverted rated supply) | 1,00,00,000 |
| Adjusted Total Turnover | 1,00,00,000 |
| Tax payable on medicines | 5,00,000 |
| Net ITC (APIs, excipients, packing) | 9,00,000 |
| ITC on input services (testing, freight, rent) | 1,00,000 |
| ITC on inputs + input services | 10,00,000 |
Rule 89(5): Refund = (Turnover of inverted rated supply × Net ITC ÷ Adjusted Total Turnover) − (Tax payable × Net ITC ÷ ITC on inputs and input services)
= (1,00,00,000 × 9,00,000 ÷ 1,00,00,000) − (5,00,000 × 9,00,000 ÷ 10,00,000) = 9,00,000 − 4,50,000 = ₹4,50,000
Credit ledger at the end of the quarter: 10,00,000 − 5,00,000 = ₹5,00,000. The refund is the least of the formula figure and the ledger balances, so ₹4,50,000. Test your own figures on the GST refund calculator. Each term is explained in Net ITC in the refund formula and Adjusted Total Turnover.
Pharma-specific traps
1. Exempt items in the product mix. Section 54(3)(ii) excludes output supplies that are nil-rated or fully exempt. The exemption list has included items such as human blood and its components and contraceptives. If part of your range is exempt, that turnover is left out of Adjusted Total Turnover, and credit used for it has to be reversed under the common-credit rules. The refund only runs on the taxable inverted portion. See inverted duty refund where output is exempt or nil-rated.
2. Pre-cut stock sold after 22.09.2025. A distributor or C&F agent who bought stock at the old rate and sells the same goods at the new lower rate is dealing in the same goods. CBIC's view in Circular 135/05/2020 (para 3.2 as substituted by Circular 173/05/2022) is that this is not an inverted duty case, except where a concessional notification applies to the same goods at the same time. The Handbook notes High Court rulings that disagree (Shivaco Associates, Calcutta HC; Baker Hughes, Rajasthan HC). A manufacturer is in a stronger position because its inputs and output are different goods. Read ITC accumulation after GST 2.0 rate cuts before you claim on this ground.
3. Loan licence and contract manufacturing. Where a third party manufactures for you, what you receive may be a service (job work) rather than goods. Credit on that charge is input service credit and stays out of Net ITC. Map each contract before you classify the credit.
4. Exports mixed with domestic sales. Exports under LUT are claimed under Rule 89(4) in a different refund category. Domestic inverted supplies go under Rule 89(5). The same credit cannot be claimed twice. For the export route, see refund of IGST on exports with and without payment.
5. GSTR-2B gaps. Small packing and chemical suppliers who file late push invoices out of your GSTR-2B. Those invoices drop out of the refund. Reconcile every month.
6. Time limit. The two-year period runs from the due date of the GSTR-3B for the period in which the claim arises. Do not let quarters from 2024–25 slip.
Filing, in brief
The claim goes in RFD-01 under the inverted tax structure category, with Statement 1 (formula) and Statement 1A (invoices). No CA certificate on unjust enrichment is needed for ITC refunds. The officer must acknowledge or issue a deficiency memo within 15 days and sanction within 60 days of a complete application. The Finance Act 2026 extends 90% provisional refund to inverted duty claims, but that change is enacted, not yet in force, as it awaits notification. The full walk-through is in how to file an inverted duty refund on the GST portal.
Need help with a pharma refund?
Pharma claims usually mix taxable, exempt and export lines, and the rate change of September 2025 adds a second layer. We can build the HSN-wise rate map, separate goods credit from service credit, and file and follow the RFD-01 to sanction. See GST refund for inverted duty structure, or start at the GST refund hub.
Key takeaways
- Pharma manufacturers can claim inverted duty refunds under section 54(3)(ii) and Rule 89(5).
- Net ITC means credit on APIs, excipients and packing. Testing, contract manufacturing charges, freight and machinery are out.
- Nil-rated or fully exempt medical items do not qualify, and their turnover is excluded from Adjusted Total Turnover.
- GST rates on drugs and formulations were reduced from 22.09.2025. Verify current rates for each HSN.
- Traders selling the same goods bought before the rate cut face CBIC's "same goods" position.
Read next
- How to file inverted duty refund on the GST portal
- Inverted duty refund rejected: common grounds
- GST refund formula explained: Rule 89
- Inverted duty refund formula with calculation examples
Disclaimer: Positions stated as on 30 September 2026, based on the CGST Act and Rules as amended, the Finance Act 2026, and the ICAI Handbook on Refunds under GST (January 2026). Verify current notifications before filing.