What "inverted duty structure" means
An inverted duty structure arises when the GST rate on a business's inputs is higher than the GST rate on its output supply — meaning input tax credit accumulates faster than it can be used against output liability. GST law allows a refund of this accumulated, unutilised credit in specified circumstances.
Who is generally eligible
Businesses whose output supply attracts a lower GST rate than a meaningful share of their inputs are the typical candidates — certain manufacturing sectors are the most common examples. Not every accumulation of credit qualifies; the refund mechanism specifically targets the rate-inversion scenario, with certain categories of goods and services excluded by notification.
What the claim process generally involves
- Computing the eligible refund amount using the prescribed formula, which factors in the ratio of inverted-rated inputs to total turnover for the period
- Filing the refund application on the GST portal with supporting statements and reconciliations
- Departmental scrutiny of the claim, which may involve queries or a request for additional documentation
- Sanction and disbursement, once the claim is accepted
Common reasons claims get rejected or delayed
- Incorrect computation of the refund formula, particularly when a business has both inverted and non-inverted supplies mixed together
- Missing or inconsistent supporting documentation, especially where purchase invoices don't clearly tie back to the claimed period
- Claiming refund on credit that falls into an excluded category under the relevant notification
- Filing outside the limitation period, which is strictly enforced
Why this is worth getting right the first time
A rejected or partially sanctioned refund claim often takes considerably longer to resolve on appeal than it would have taken to file correctly from the outset. Getting the computation and documentation right before submission is almost always the faster path to actually receiving the refund.
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