What is Inverted Duty Structure (IDS)?
An Inverted Duty Structure arises when the GST rate on inputs (purchases) is higher than the GST rate on output (sales). Because of this, Input Tax Credit (ITC) accumulates in electronic credit ledger and cannot be fully utilized.
This leads to a working capital blockage for businesses — especially manufacturers and exporters.
Government allows Refund of Unutilized ITC under Section 54(3) of CGST Act.
What is Provisional Refund?
Under GST law, taxpayers applying refund are eligible for:
| Type | Refund Release | Time Limit | Form |
| Provisional Refund | 90% of claim | Within 7 days | RFD‑04 |
| Final Refund | Remaining 10% | After verification | RFD‑06 |
Applicable when department believes claim is prima facie correct.
Legal Provisions (Updated 2026)
| Section / Rule | Description |
| Section 54(3) CGST Act | Refund of unutilized ITC allowed |
| Rule 89(5) CGST Rules | Formula for IDS refund |
| Rule 91 | Provisional Refund |
| Circular 125/44/2019‑GST | Standard refund procedure |
| Circular 181/13/2022‑GST | Clarification on ITC restrictions |
| Finance Act Updates till 2026 | ITC only of Inputs (NOT services) eligible |
Eligible & Not Eligible ITC
| Particular | Refund Allowed? |
| Raw Material ITC | Yes |
| Packing Material | Yes |
| Input Services | No |
| Capital Goods | No |
| Electricity | No |
| Consumables used in manufacturing | Yes |
Refund Formula (Rule 89(5))
Refund Amount = (Turnover of inverted rated supply × Net ITC ÷ Adjusted Total Turnover) – Tax payable on such inverted supply
Key Terms Explained
| Term | Meaning |
| Net ITC | ITC of Inputs only |
| Adjusted Total Turnover | Total turnover excluding exempt supplies |
| Turnover of inverted supply | Sales having lower GST rate |
Practical Example (Manufacturing Case)
Business: Shoe Manufacturer
| Particular | Amount (₹) | GST Rate |
| Raw Material Purchase | 10,00,000 | 18% |
| Output Sales | 12,00,000 | 5% |
Step 1 – ITC Available
| Calculation | Amount |
| ITC on Purchase | 1,80,000 |
| Output GST Liability | 60,000 |
| Unutilized ITC | 1,20,000 |
Step 2 – Refund Calculation
| Particular | Amount |
| Turnover of inverted supply | 12,00,000 |
| Net ITC | 1,80,000 |
| Adjusted Turnover | 12,00,000 |
| Output tax payable | 60,000 |
Refund = (12,00,000 × 1,80,000 ÷ 12,00,000) – 60,000
Refund = 1,80,000 – 60,000 = ₹1,20,000 Eligible Refund
Provisional Refund Released
| Stage | Amount |
| 90% Provisional | ₹1,08,000 |
| Final Refund | ₹12,000 |
Filing Procedure (Step‑by‑Step)
| Step | Action |
| 1 | File GSTR‑1 & GSTR‑3B |
| 2 | Go to GST Portal → Refund Application |
| 3 | Select Refund on account of Inverted Duty Structure |
| 4 | Upload Statement‑1 |
| 5 | Upload CA Certificate if > 2 Lakhs |
| 6 | Submit ARN |
| 7 | Department issues RFD‑02 (Acknowledgement) |
| 8 | Provisional Refund in RFD‑04 |
| 9 | Final Order RFD‑06 |
Documents Required
| Document | Mandatory |
| Purchase Invoices | ✔ |
| Sale Invoices | ✔ |
| GSTR‑2B | ✔ |
| Undertaking (Rule 89) | ✔ |
| CA Certificate (>2 lakh) | ✔ |
| Reconciliation Statement | ✔ |
Common Mistakes Leading to Rejection – (Imp)
| Mistake | Result |
| Including services ITC | Refund reduced |
| Mismatch with GSTR‑2B | Query notice |
| Wrong turnover considered | Excess claim recovery |
| Non‑filing of returns | Refund blocked |
| HSN mismatch | Scrutiny |
Practical Tips (Very Important for 2026)
| Tip | Why Important |
| Match with GSTR‑2B only | Mandatory after system validation update |
| Avoid blocked credits | Department auto detects |
| Use monthly filing | Faster sanction |
| Maintain stock records | Required in audit |
| Separate input ledger | Helps in scrutiny |
Time Limits
| Particular | Limit |
| Refund application | Within 2 years |
| Provisional refund | 7 days |
| Final refund order | 60 days |
| Interest payable by govt | After 60 days @ 6% |
Conclusion
The Provisional Refund under Inverted Duty Structure is one of the most powerful working‑capital relief mechanisms in GST — especially for manufacturers, textile traders, footwear businesses and pharma sectors.
Businesses that properly maintain records and file accurate statements typically receive 90% refund within a week, making it a crucial monthly cash‑flow tool rather than just a compliance process.
In 2026, due to automated validations, accuracy matters more than documentation volume.
Published on: April 5, 2026