Procedures for Allocating Duty Drawback Quantities and Adjusting Ratios for Raw Materials with Multiple Tariff Rates Released

Duty drawback on raw materials used in the production of export goods is a critical system for enhancing export competitiveness. However, the process becomes complex when identical raw materials are subject to different tariff rates depending on the time of import or the application of FTA preferential rates. Below is a detailed guide on how to handle duty drawbacks for raw materials with varying tariff rates to prevent excessive refunds under the relevant Special Act and Adjustment Notices.

1. Basic Principle of Duty Drawback: Recognition of Substitution

Article 3, Paragraph 2 of the Special Act on the Refund of Customs Duties, etc. for Export Raw Materials (the "Special Act") provides a key regulation to enhance the efficiency of the drawback system. This provision allows for the substitution of materials. If domestic and imported raw materials are of the same quality and characteristics and are interchangeable, they are treated as a single pool. Recognizing the difficulty of physically distinguishing between domestic and imported materials during production, the law allows for refunds regardless of whether the specific unit used was imported or locally sourced. This simplifies the verification process for companies where physical separation is inefficient or impossible.

2. Special Management of Items at Risk of Over-Refund: The Role of the Adjustment Notice

While the substitution principle offers flexibility, it creates a risk of excessive refund (over-refund). This occurs if a company imports the same material at different rates (e.g., basic rate, FTA rate, quota rate) and applies for a refund using only the highest-duty import permits, even if zero-duty materials were used. To prevent this and ensure fairness, the Korea Customs Service operates the Notice on Adjustment of Refund Methods for Imported Raw Materials (the "Adjustment Notice"). This notice specifies items at risk of over-refund (Annex 2 of the Notice) and mandates stricter standards for calculating their refund amounts.

3. Method for Allocating Refund Quantities by Tariff Rate

The core of the Adjustment Notice is the pro rata allocation of refund quantities by tariff rate. When applying for a drawback on multi-rate items, the following principles apply:

• Standard Reference Period: Allocation is based on the import performance of the calendar year preceding the year in which the export declaration was accepted.
• Calculation of Ratios: The company must calculate the import volume ratio for each tariff rate (including 0% rates from FTAs or duty exemptions) from the previous year. Including 0% rates is essential because these volumes do not generate a refund; excluding them would lead to an over-refund.
• Application to Exports: The raw material quantity consumed for current exports must be distributed according to these calculated ratios. For example, if 50% of the previous year's imports were dutiable and 50% were duty-free, a company can only claim a refund for up to 50 units out of every 100 units of raw material consumed for an export product.

This method functions similarly to an average tariff rate system, reflecting statistical import patterns to prevent unfair duty recovery.

4. Adjusting the Ratio of Import Volumes by Tariff Rate

Since trade environments change, the previous year's ratios may not reflect current reality. The Adjustment Notice allows companies to request an adjustment of the tariff rate ratios under specific circumstances:

• Necessity of Adjustment: This applies when there is a significant shift in import sources (e.g., new FTA partners), changes in production processes, or market fluctuations that cause the actual ratio of dutiable imports to vary significantly from the previous year.
• Adjustment Procedure: A claimant may apply for an adjustment to the Commissioner of the Korea Customs Service. The applicant must provide objective evidence proving that the actual consumption ratio by tariff rate differs from the previous year. Required documents typically include import declaration certificates, inventory ledgers, production logs, and statements of raw material usage. The authorities will review these to re-establish a fair refund ratio.

5. Practical Considerations for Compliance

Managing duty drawbacks for multi-rate items carries a high administrative burden. To ensure accurate and timely refunds, companies should focus on the following:

• Accurate Consumption Calculation (BOM): Establish a robust system for calculating the standard input yield (quantity required) from the point of raw material receipt to final export.
• Strict Inventory Management: Systematically maintain all records, including import permits, receiving reports, and inventory transfers. Segmenting inventory by tariff rate and source is highly beneficial.
• Consultation with Experts: Given the complexity of the Adjustment Notice and frequent regulatory updates, it is advisable to consult with a Licensed Customs Broker to ensure compliance and optimize refund strategies.
• System Utilization: Leverage ERP systems or specialized duty drawback software to automate consumption calculations and manage the data required for applications.

In conclusion, while the Special Act allows for the substitution of raw materials, the Adjustment Notice acts as a safeguard against over-refunds by requiring allocation based on historical import ratios. Understanding these mechanisms and utilizing the adjustment process when necessary is essential for securing legitimate refund rights.