Inverted Duty Structure (IDS) under GST is the technical condition recognised by Section 54(3)(ii) of the CGST Act, 2017 where the rate of GST on inputs used by a registered person is higher than the rate of GST on the output supply — resulting in a continuous build-up of unutilised input tax credit (ITC) in the electronic credit ledger. Because output GST cannot absorb the higher input GST, the credit pool keeps growing month after month, silently tying up real working capital. The law recognises this imbalance by allowing a refund of such accumulated ITC under a prescribed formula, but restricts it to specific input categories and excludes others.
Sectors that routinely operate under an IDS include textile and man-made fibre manufacturers, fertilisers, certain categories of footwear, solar and renewable energy products, railway wagons, many chemical and pharmaceutical intermediates, fabric processing units, and a number of notified service sectors. The IDS refund is computed under Rule 89(5) of the CGST Rules — where credit on input services and capital goods is generally not eligible, certain notified supplies are completely excluded, and the formula itself has been amended multiple times through CBIC notifications and judicial intervention. Getting the classification, computation, and documentation right is a high-stakes exercise with direct impact on cash flow, pricing, and long-term viability of the product line.
We offer end-to-end Inverted Duty Structure Advisory — from diagnosing whether your product / service genuinely qualifies as IDS, classifying notified exclusions, designing ITC and procurement structures to optimise refund, preparing Rule 89(5) computations, filing RFD-01 with Statement 1 / 1A, responding to RFD-03 deficiency memos and RFD-08 show cause notices, litigating historical denials through appeals and writs, and advising on commercial pricing and restructuring to manage residual ITC — so that IDS becomes a managed, refundable working capital asset rather than a permanent leak.
Where the headline GST rate on inputs is higher than the rate on the finished output — the textbook case of IDS.
Where output rates are comparable but input mix is heavily weighted to higher-rated items, creating effective inversion.
Fabric processors, man-made fibre units, and apparel manufacturers running under 5% output vs 12% / 18% inputs.
Urea and complex fertiliser manufacturers — classical IDS sector with heavy refund dependency.
Low-value footwear producers with output at 5% / 12% while inputs flow in at 18%.
Solar module and renewable energy equipment manufacturers with concessional output rates.
Wagon builders and railway equipment suppliers working on historically concessional output rates.
Active pharmaceutical ingredients (APIs), bulk drugs, and contract manufacturers with mixed rate exposure.
Speciality and intermediate chemical producers dealing with 18% raw materials but varying output rates.
Farm tractors and agri-equipment manufacturers operating on lower notified rates with standard-rated inputs.
Product-wise review to confirm whether an inverted duty structure actually exists — and whether refund is available.
Structured refund computation using the Rule 89(5) formula with proper treatment of inputs and output.
RFD-01 filing, SCN defence, litigation of denials, and commercial advisory on residual ITC.
Technical review of each product / SKU to confirm IDS and map refund potential at the SKU level.
Checking each product against CBIC notifications that exclude certain goods / services from IDS refund.
Refund computation using the amended Rule 89(5) formula, with post-VKC Footsteps interpretation.
Preparation and filing of RFD-01 with Statement 1 / 1A, invoices, computations, and supporting evidence.
Designing procurement, vendor, and ITC-availment SOPs to maximise refundable ITC and reduce leakage.
Responding to RFD-08 SCNs and defending against partial or full rejection of IDS refund claims.
Appeal before GST Appellate Authority, Tribunal, and High Court for legacy and disputed IDS refunds.
Advisory on product mix, pricing, and rate optimisation to manage residual ITC at the strategic level.
ITC ledger keeps increasing month after month with no realistic chance of being used against output tax.
Doubt on whether credit on input services is refundable — an issue settled by VKC Footsteps ruling.
Specific HSN codes / services notified as excluded from IDS refund through CBIC notifications.
Officer allowing only a portion of the claim citing interpretational differences on the formula.
Full rejection of IDS refund claim through RFD-06 requiring appeal under Section 107.
Refunds pertaining to periods before the Rule 89(5) amendment, needing careful retrospective analysis.
Entities with both inverted duty and zero-rated exports needing combined refund strategy.
ITC disallowed due to 2B mismatch, wrong classification, or vendor non-compliance.
HSN-wise mapping of input vs output rates to confirm inverted duty structure across products.
Formal IDS eligibility memo covering notified exclusions, services / capital goods treatment.
Building the Rule 89(5) formula working with net ITC, inverted turnover, and adjusted total turnover.
RFD-01 filing with Statement 1 / 1A, deficiency memo and SCN handling, final sanction tracking.
Recommendations on pricing, vendor mix, and product strategy to manage residual IDS credit.
Partner with our specialists for end-to-end Inverted Duty Structure Advisory — diagnosis, Rule 89(5) computation, refund filing, SCN defence, and product / pricing strategy — all under one roof.
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