GST for Pharmaceutical Manufacturers in India (2026): API Input Tax, Inverted Duty Refunds, Free Samples, Exports and Job Work

India is the world's third-largest producer of medicines by volume, and pharma exports crossed US$30 billion in FY 2024-25. For a manufacturer, though, GST is not a single-rate story. You buy active pharmaceutical ingredients at 18%, sell most formulations at 5%, give away physician samples on which ITC is blocked, export on a zero-rated basis and send material to loan licensees and contract manufacturers under job work rules.

This guide covers the GST issues specific to pharmaceutical manufacturers and formulators: the rate gap between APIs and finished doses, the Rule 89(5) inverted duty refund (with a worked example), free samples, exports, medical devices and job work. For a retail-level rate and HSN reference, see our guide to GST on medicines and pharmaceutical products.

Key points

• Most formulations: 5% from 22 September 2025. The 12% slab for medicines is gone.
• 36 specified life-saving drugs: Nil. Nil means exempt, so the related ITC is reversed, not refunded.
• Most APIs (Chapter 29): 18%. This gap creates a permanent inverted duty structure.
• Refund: Section 54(3) + Rule 89(5), Form RFD-01, 2 years from the GSTR-3B due date of the period.
• Free samples: ITC blocked under Section 17(5)(h).
• ITC-04: half-yearly (turnover above Rs 5 crore) or annual, not quarterly.

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GST Rates for Pharma Products After GST 2.0

The 56th GST Council meeting (3 September 2025) recommended the rate changes, and Notification 9/2025-CT(Rate) brought them into force from 22 September 2025.

Tax Rate Chart

GST Rates Across the Pharma Supply Chain

From 22 September 2025 (Notification 9/2025-CT(Rate))

36 specified life-saving drugs

33 moved from 12% and 3 cancer / rare disease drugs moved from 5%. Only drugs named in the notification qualify

Nil

Finished formulations (HSN 3003, 3004)

Tablets, capsules, syrups, injections, insulin, antibiotics. Previously 12% for most

5%

AYUSH medicines in retail packs

Ayurvedic, Unani, Siddha, Homeopathic medicaments under 3003/3004

5%

Diagnostic kits and reagents (HSN 3822)

Reduced from 12%

5%

Most medical devices and instruments

HSN 9018, 9021 and specified entries. See the devices section below

5%

APIs, bulk drugs and intermediates (Chapter 29)

Most organic chemicals used as drug substances

18%

Solvents, packaging, general lab chemicals

Rates vary by HSN; many common inputs sit at 18%

18%

Source: CBIC Notification 9/2025-CT(Rate); 56th GST Council press release

Nutraceuticals and food supplements usually fall under Chapter 21 (often HSN 2106), not Chapter 30, so the medicine rate does not apply to them automatically. Classify each SKU on its own label and composition.

Did the Rate Cut Reach Patients?

A medicine with a pre-tax price of Rs 1,000 cost Rs 1,120 at 12% GST. At 5% it costs Rs 1,050. The National Pharmaceutical Pricing Authority directed manufacturers to revise MRPs so that the reduction reached consumers, so a manufacturer carrying old-MRP stock needed revised price labels or stickers from 22 September 2025.

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Chapter 30 HSN Codes Used by Manufacturers

APIs are not Chapter 30 goods. They are mostly organic chemicals under Chapter 29, which is why they did not get the 5% rate. Finished and semi-finished medicaments sit in Chapter 30:

Comparison

Chapter 30 HSN Codes

Parameter

3003 vs 3004: 3003 covers medicaments in bulk, for example a formulated blend sold to another company for packing. 3004 covers the same medicaments put up in measured doses or retail packs. A contract manufacturer supplying packed strips uses 3004; a supplier of bulk granules for someone else to tablet and pack may fall under 3003. Both are 5%, but the HSN on the e-invoice must match what you actually supply.

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The Inverted Duty Structure: APIs at 18%, Formulations at 5%

Before September 2025, most formulations were at 12% and the inversion against 18% APIs was moderate. With formulations at 5%, almost every domestic formulator now accumulates ITC every month. That credit is working capital locked in the electronic credit ledger until it is refunded. For the general mechanics, see our guide to the GST inverted duty structure refund.

Legal Basis

The exclusion of input services from Net ITC was challenged and upheld by the Supreme Court in Union of India v. VKC Footsteps India Pvt Ltd (2021).

The Rule 89(5) Formula (as amended from 5 July 2022)

Maximum Refund = (Turnover of inverted rated supply x Net ITC / Adjusted Total Turnover) - (Tax payable on inverted rated supply x Net ITC / ITC availed on inputs and input services)

The second term matters. Before July 2022, the full output tax was deducted. The amendment deducts only the share of output tax that is funded by input credit, which increased refunds for most claimants.

Worked Example: A Mid-Sized Formulator

A formulator sells Rs 120 crore of 5% formulations in a year, all domestic, with no exempt or export turnover.

Step 1: 120 x 15.48 / 120 = Rs 15.48 crore

Step 2: 6.00 x 15.48 / 16.08 = Rs 5.78 crore

Maximum refund: 15.48 - 5.78 = about Rs 9.70 crore a year

The credit ledger builds up by Rs 10.08 crore (16.08 - 6.00). Of that, Rs 9.70 crore is refundable. The balance of about Rs 0.38 crore is the share linked to input services, which stays in the ledger. In practice, every input will not be at 18%, so recompute with your actual purchase register.

What Reduces or Blocks the Refund

• Nil-rated drugs: Supplies of the 36 Nil-rated drugs are exempt supplies. ITC used for them is reversed under Rule 42 and 43 and is not refundable. If one of your molecules moved to Nil in September 2025, the API credit for it is now a cost.
• Exports: Export turnover under LUT is refunded under Rule 89(4), not 89(5). Keep the two claims separate for the same period.
• Mismatch with GSTR-2B: Only ITC reflected in GSTR-2B is eligible under Section 16(2)(aa). Supplier non-filing directly cuts your Net ITC.
• Wrong classification: If the officer reclassifies an input or output, the inversion itself can be questioned.

Provisional Refund

Following the 56th GST Council's recommendation, inverted duty refund claims now get a 90% provisional refund on the lines of export refunds, based on system risk evaluation. High-risk claims still go through full scrutiny, so clean reconciliations help.

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ITC Reconciliation: Where Pharma Claims Fail

Refund officers test the Statement 1A invoices against GSTR-2B and your GSTR-1 and GSTR-3B. The common gaps:

1. API supplier filing delays. ITC is available only if the supplier's invoice appears in your GSTR-2B (Section 16(2)(aa), in force since 1 January 2022).
2. IMS actions. Since the Invoice Management System went live in October 2024, you can accept, reject or keep invoices pending. Invoices you take no action on are deemed accepted and flow into GSTR-2B. Rejecting a genuine API invoice by mistake removes that credit from your refund base.
3. Capital goods mixed into inputs. Lab equipment or machinery wrongly booked as inputs inflates Net ITC.
4. Credit notes from distributors. Rate-difference and expiry credit notes reduce your output tax and turnover; they must match on both sides.

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Free Samples and Physician Samples

Pharma companies distribute physician samples marked "Not for Sale" to doctors and hospitals. The GST position is settled in the statute:

Keep a sample register linking each batch to the ITC reversed. It is the first document asked for in audits.

Income tax angle: Gifts and freebies given to doctors in breach of the medical council regulations are not deductible business expenditure. The Supreme Court confirmed this in Apex Laboratories Pvt Ltd v. DCIT (2022) under Explanation 1 to Section 37(1).

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Exports of Pharmaceuticals

Exports are zero-rated supplies under Section 16 of the IGST Act. You choose one of two routes:

Comparison

Export Routes for Pharma Manufacturers

Parameter

Documents to keep: shipping bill, export general manifest, tax invoice, LUT acknowledgment, and bank realisation (e-BRC) for LUT exports. The old central excise ARE-1 form does not apply under GST.

Supplies to merchant exporters: If you sell to a merchant exporter instead of exporting yourself, you can charge 0.1% GST under Notification 40/2017-CT(Rate) and 41/2017-IT(Rate), provided the goods are exported within 90 days and the notification conditions are met.

For detailed steps, see our guide to GST on export of goods under LUT.

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Medical Devices

Medical devices are classified outside Chapter 30, mainly under Chapter 90. GST 2.0 moved most of them to 5%:

Device makers face the same inversion as formulators: many components and electronics are at 18% while the finished device is at 5%. The Rule 89(5) refund applies on the same basis.

Hospitals: Healthcare services by clinical establishments are exempt, so a hospital cannot claim ITC on devices it buys or imports for those services. See GST on healthcare and medical services.

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Job Work and Contract Manufacturing

Pharma brand owners routinely send APIs and packing material to contract manufacturers. If you (the principal) send inputs under a delivery challan and get back processed goods, it is job work under Section 143 of the CGST Act, and no GST is payable on the dispatch.

Track the age of every challan. A consignment approaching the one-year limit either needs to come back, be supplied onward from the job worker's premises, or be treated as a supply. See our job work guide under Section 143 for the challan format.

Loan licensing: If the loan licensee buys its own inputs and sells finished goods to you, that is a sale of goods at 5%, not job work. Your contracts and invoices should reflect which model you actually use.

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Distributors and Chemists: What Manufacturers Should Know

Your GST compliance affects your buyers' ITC, so these rules matter downstream too:

• GST registration: Required once turnover from goods exceeds Rs 40 lakh in most states. In states that did not adopt the higher limit, including Telangana, the threshold is Rs 20 lakh. See GST registration thresholds.
• Composition for chemists: Retail chemists with turnover up to Rs 1.5 crore can opt for the composition scheme at 1% of turnover. They cannot claim ITC or charge GST on the bill.
• MRP: MRP is inclusive of all taxes. No one in the chain can add GST on top of MRP.
• E-commerce: Online pharmacy marketplaces collect TCS under Section 52 at 0.5% (0.25% CGST + 0.25% SGST) since 10 July 2024. Section 9(5) makes the marketplace liable only for specified services such as passenger transport and restaurant services; it does not apply to medicine sales.
• E-invoicing: If your aggregate turnover exceeds Rs 5 crore, every B2B invoice must carry an IRN. Distributors lose ITC on invoices that should have been e-invoiced but were not.

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Key Takeaways

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Where Tax Garden Helps

For a formulator, the inverted duty refund is often the single largest working capital item on the balance sheet, and it is lost for good once the two-year window closes. Tax Garden can help you:

• Classify APIs, formulations and devices under the correct HSN and rate
• Compute Rule 89(5) and Rule 89(4) refunds and file RFD-01 with Statement 1 and 1A
• Reconcile GSTR-2B and IMS actions with your purchase register every month
• Work out ITC reversals for free samples and Nil-rated drugs
• File LUT and ITC-04 on time and track job work challans
• Draft replies to deficiency memos and show cause notices on refunds

Looking for expert help with GST filing and refund support for pharma manufacturers? The team at Tax Garden, based in Kondapur, Hyderabad, helps Indian SMEs stay compliant. End-to-end filings, notices, and deadline tracking, all in one place.

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Rates and rules are as of 18 September 2026. GST notifications change often, so check the current rate notification and CBIC circulars on cbic-gst.gov.in before relying on a rate or refund computation. This article is general information, not professional advice for your specific facts.