Inverted duty structure

Also called: IDS, Inverted tariff structure · Topic: Taxation: Direct and Indirect Taxes, GST and Global Tax Issues · NCERT: Beyond NCERT

Meaning

An inverted duty structure (IDS) is a situation where the inputs a business buys are taxed at a higher GST rate than the finished product it sells. Because of this, the business collects input tax credit (ITC) (the GST it paid on inputs, which it can subtract from the GST it owes on its own sales) that it cannot fully use.

• Why it matters: the unused credit stays stuck in the business's account. This blocks working capital (the cash a business needs for day-to-day running) until the government refunds it. Small firms suffer most.
• Condition: GST rate on inputs > GST rate on output → ITC on inputs > GST payable on output → unused ITC builds up.

Explanation

How it works

• The normal ITC chain:
• A business pays GST when it buys inputs.
• It subtracts that amount from the GST it owes on its sales.

• So each stage pays tax only on the value it adds.

• What goes wrong under IDS:

• The input rate is higher than the output rate.
• So the GST owed on sales is less than the GST already paid on inputs.
• The extra credit cannot be used. It piles up month after month.
• The business has already paid this tax in cash, so its money stays locked until a refund comes.

Worked example (garment maker, pre-2025 rates)

Stage	Value	GST rate	GST
Buys yarn (input)	₹100	12%	₹12.00 (ITC)
Sells garments (output)	₹150	5%	₹7.50 (payable)
Unused ITC			₹4.50

• The garment maker has added ₹50 of value, yet it owes nothing more in GST.
• Instead, ₹4.50 of credit is stuck until it is refunded.
• Repeat this over a whole year of sales and a large sum of cash is locked up.

Why it arises

• Too many slabs: the 2017 structure had five main slabs (0, 5, 12, 18 and 28%). Inputs and outputs of the same value chain often ended up in different slabs.
• Low rate on the final product for social reasons: items of mass use (clothes, footwear, fertilisers, medicines) were kept at low rates, but their raw materials were taxed higher.
• Typical sectors: textiles (fibre and yarn vs garments), footwear, fertilisers, pharma.

What reduces it

• Aligning rates along the value chain: tax the input at the same rate as the output or lower. Example: man-made fibre and yarn cut to 5% in 2025 [3].
• Fewer slabs: with fewer rates, there is less chance that input and output fall in different ones.
• Refund of the stuck credit: where inversion remains, the law allows a refund of accumulated ITC.

In India

• Who decides rates: the GST Council (Article 279A; the Union Finance Minister and State Finance Ministers) recommends GST rates. So it can create or remove an inversion.
• Refund rule: Rule 89(5), CGST Rules gives the maximum refund:

• Maximum refund = (Turnover of inverted-rated supply × Net ITC ÷ Adjusted total turnover) − [Tax payable on that inverted-rated supply × (Net ITC ÷ ITC availed on inputs and input services)]

• 56th GST Council (3 September 2025), "Next-Gen GST":

• Main slabs cut to 5% (merit rate) and 18% (standard rate), plus a 40% special rate, effective 22 September 2025 [1][2].

• Guiding principle: similar goods should pay the same rate. This means less wrong classification and fewer disputes [2].

• Textile fix (2025):

• Man-made fibre: 18% → 5%.
• Man-made yarn: 12% → 5%.

• This corrects the inversion in the textile chain [3].

• Faster refunds (2025): where inversion still remains, the stuck credit can be refunded. 90% of inverted-duty refunds will now be paid provisionally (paid first, checked later), so they reach businesses faster [3].

Don't confuse with

• Tax cascading ("tax on tax"): this happens when the ITC chain breaks and no credit is allowed at all. Example: petroleum and electricity are outside GST, so the tax paid on them cannot be set off. Under IDS the credit exists but is more than the business can use.
• Classification dispute: this is an argument between a business and a tax officer over which slab an item belongs to. IDS is about the gap between input and output rates. Both came from the many slabs of 2017.
• Inverted duty in customs (inverted tariff structure): here the customs duty on imported raw materials or parts is higher than on the imported finished good. This makes it cheaper to import the finished product than to make it in India. GST IDS is about domestic tax rates and stuck ITC.
• Anti-profiteering (Section 171, CGST Act): this makes businesses pass GST rate cuts and ITC benefits on to buyers as lower prices. It protects consumers. The IDS refund protects the business's cash flow.

Prelims Hooks

• IDS means the GST rate on inputs is higher than on output. Trap: a higher output rate than input rate is the normal case, not inversion.
• The refund of accumulated ITC under inverted duty is calculated under Rule 89(5), CGST Rules.
• 2025 textile fix: man-made fibre 18% → 5%, man-made yarn 12% → 5% [3].
• 90% of inverted-duty refunds are now paid provisionally [3].
• Sectors usually linked to IDS: textiles, footwear, fertilisers, pharma.
• Trap: "The 2025 rationalisation ended all inverted duty structures" is wrong. Inversion remains in some cases, and refunds continue for them [3].

Mains Points

• MSMEs and working capital:
• Stuck ITC is cash the firm has already paid to the government.
• Small firms in textiles and footwear have little spare cash, so this hurts their production and exports.

• Two main slabs in 2025, the fibre–yarn rate cuts and 90% provisional refunds make it easier for them to do business [3].

• Rate alignment vs revenue:

• Cutting input rates removes inversion, but the government collects less tax. The net revenue loss from the 2025 changes is estimated at about ₹48,000 crore, and states share this loss.
• Raising output rates instead would make goods of common use costlier for consumers.

• So the design choice is really a choice between revenue, prices and industry's cash flow.

• Unfinished GST agenda: petroleum, electricity and real estate are still outside GST, so the ITC chain is still broken there. Bringing them in, paying refunds faster and keeping similar goods in the same rate would make GST a truly "good and simple tax".

Related concepts

• GST rate slabs
• GST compensation cess
• Anti-profiteering

Read more

• GST rates, compensation and the 2025 rationalisation