How Turkish Converters Import Chinese Polymer Duty-Free: The Inward Processing Regime Explained

Chinese commodity polymers — polyethylene, polypropylene, PVC — face a cumulative cash outlay of roughly 31-49% above CIF when imported into Turkey through standard channels. MFN customs duty at 6.5%, anti-dumping duties ranging from approximately 3% to 18% depending on the product and exporter, and 20% KDV calculated on the compounded base. As Article 2 in this series demonstrates, a $1,000/MT CIF shipment of Chinese HDPE can cost $1,434-1,549 at the warehouse gate once the full duty stack is applied, depending on the applicable anti-dumping rate.

That burden makes Chinese resin uncompetitive for many Turkish buyers — at least compared with duty-free EU-origin material under the Customs Union, or domestically produced PETKIM resin. In a straightforward cost comparison, Chinese polymer often loses.

But there is a legal exception that transforms the economics entirely. Turkey's Inward Processing Regime — Dahilde İşleme Rejimi, universally known as DIR — suspends every layer of that duty stack for raw material imports destined for re-export as finished goods. Under DIR, that same $1,000/MT HDPE shipment lands at approximately $1,020/MT. Not $1,500. Not $1,200. One thousand and twenty dollars, with only port handling and clearing fees on top of the CIF price.

DIR is not obscure. Large Turkish exporters — in textiles, automotive components, food packaging, white goods — have used it for decades. It is one of the principal mechanisms through which Turkey maintains export competitiveness despite having no free trade agreement with major Asian suppliers. But among mid-tier polymer converters, DIR remains underutilized. Many smaller firms either do not know they qualify, assume the administrative burden is prohibitive, or have never calculated the savings against their current procurement costs.

This article provides a complete operational guide. By the end, you will know whether your firm qualifies, how the application process works, what conversion ratios mean in practice, and how to avoid the compliance pitfalls that create retroactive duty liability.

This is Article 3 in a five-part series on Turkey's trade defense regime and Chinese polymer imports. Article 1 covers the anti-dumping regulatory framework. Article 2 provides the landed cost calculator for standard imports.

Disclaimer: This article provides procurement guidance based on publicly available regulations and is intended for educational purposes. It does not constitute legal, tax, or customs advice. Regulatory details, duty rates, and procedural requirements change over time. Consult your gümrük müşaviri (licensed customs broker) and relevant legal advisors for guidance specific to your company's situation.

The Dahilde İşleme Rejimi is a customs procedure that allows Turkish companies to import raw materials, semi-finished goods, or intermediate inputs without paying customs duties — provided those materials are used to manufacture products that are subsequently exported. The regime's legal basis is Decree No. 2005/8391 (Dahilde İşleme Rejimi Kararı), with detailed implementing provisions in the İhracat 2006/12 Communique (Tebliğ), and both have been amended multiple times since their original publication.

The regime is administered by the Ticaret Bakanlığı (Ministry of Trade), specifically through the General Directorate of Exports (İhracat Genel Müdürlüğü).

DIR suspends three categories of charges on qualifying imports:

MFN customs duty (Gümrük Vergisi). The standard 6.5% customs duty that applies to Chinese polymer imports is fully suspended under DIR.

Anti-dumping duty (Dampinge Karşı Vergi). Whatever anti-dumping rate applies to the specific Chinese exporter or product — whether 3%, 8%, 13%, or 18% — is fully suspended. This is the most significant savings component, because anti-dumping duties are the single largest cost adder for Chinese-origin polymer in Turkey.

KDV (Katma Değer Vergisi). The 20% value-added tax, which under standard import procedure is calculated on the compounded base of CIF plus all duties, is suspended under DIR. While KDV is technically recoverable for commercial importers through the tax credit mechanism, the cash flow benefit of suspension is substantial — particularly for smaller firms where the several-month recovery lag creates working capital pressure.

The suspension mechanism works on a conditional basis: duties are not waived permanently, but rather held in abeyance until the export obligation is fulfilled. If the finished goods are exported within the certificate period, the suspended duties never become due. If the export obligation is not met, all suspended duties plus interest are assessed retroactively.

The financial impact of DIR is best illustrated through a direct comparison. The following table uses Chinese HDPE at $1,000/MT CIF Mersin as the base case, with an illustrative anti-dumping rate of 18%.

On a single 100 MT order — a routine purchase for a mid-tier converter — the savings are approximately $49,400. Over a year of regular procurement at 100 MT per month, the annual savings exceed $590,000.

Even after accounting for the administrative costs of DIR compliance — application fees, customs broker fees for certificate management, and internal accounting overhead — the net benefit for any firm importing more than a few containers per year is substantial.

Note that the KDV suspension provides a cash flow benefit rather than an absolute cost savings, since KDV paid under standard import is generally recoverable through tax credits. The actual permanent savings come from the MFN and anti-dumping duty suspension: $245/MT in this example, or roughly 24.5% of the CIF value.

DIR is available to a broader range of companies than many mid-tier converters assume. The key eligibility requirements are:

Registered exporter status. The applicant company must hold an İhracatçı Belgesi (Exporter Certificate), obtained by registering with the relevant regional İhracatçı Birliği (Exporter Association). Registration requires the company to be a Turkish-incorporated entity with an active tax registration. The process is straightforward and typically takes one to two weeks.

Demonstrated export capability. The company must be able to show that imported raw materials will be used in manufacturing products for export. This does not require an existing export track record — new exporters can apply. However, you must present a credible production and export plan, including identified export markets and (for first-time applicants) evidence of production capacity such as a Kapasite Raporu (Capacity Report) from the relevant Sanayi Odası (Chamber of Industry).

Manufacturing or processing activity. The applicant must perform a genuine transformation of the imported material. Simply reselling imported polymer in the domestic market, or performing minimal processing that does not constitute substantial transformation, does not qualify. For polymer converters, qualifying activities include film extrusion, blow molding, injection molding, pipe extrusion, sheet production, compounding, and similar conversion processes.

Both manufacturers and trader-processors qualify. A company does not need to own production equipment directly if it subcontracts the manufacturing (fason üretim). Trader-processors who import raw material, have it converted by a third-party manufacturer under contract, and export the finished product can also obtain DIR certificates — though the documentation requirements are more extensive.

The critical constraint: The import and the export must be linked. Material imported under DIR cannot be diverted to the domestic market. The entire purpose of the regime is to support export-oriented production. Using DIR-imported material for domestic sales is not merely a technical violation — it is classified as customs fraud (kaçakçılık) and carries severe penalties including fines, duty recovery with interest, and potential criminal prosecution.

The DIR application process is electronic, administered through the Ticaret Bakanlığı's online system (accessible via E-Devlet authentication). Here is the sequence from application to certificate closure.

Step 1: Prepare supporting documentation

Before submitting the application, assemble:

• Capacity Report (Kapasite Raporu): Issued by the local Chamber of Industry, this document certifies your production capacity, equipment, and conversion capabilities. It is the basis for calculating permissible import quantities and conversion ratios.
• Export commitment (İhracat Taahhüdü): A declaration of the finished products you intend to export, including product descriptions, HS codes, target quantities, and destination markets.
• Raw material specifications: Detailed description of the polymer you intend to import, including HS/GTIP codes, grade specifications, and quantities required per unit of finished product.
• Conversion ratio calculation (Sarfiyat Oranı): The amount of raw material required to produce one unit of finished product, including documented waste/scrap rates. This is calculated based on the Capacity Report and must be approved as part of the certificate issuance.

Step 2: Submit the electronic application

Applications for a Dahilde İşleme İzin Belgesi (DİİB — Inward Processing Authorization Certificate) are submitted electronically through the Ministry of Trade's system. The application specifies:

• Raw materials to be imported (polymer type, HS code, quantity, estimated CIF value)
• Finished products to be exported (product type, HS code, quantity, estimated FOB value)
• Conversion ratios linking raw material input to finished product output
• Requested certificate period (up to 12 months)
• Foreign exchange usage ratio (Döviz Kullanım Oranı) — the ratio of CIF import value to FOB export value

Step 3: Certificate issuance

The Ministry of Trade reviews the application and issues the DİİB if requirements are met. The certificate specifies the permitted import quantities, the required export quantities, the conversion ratios, the certificate period, and the foreign exchange usage ratio.

Processing times vary, but straightforward applications from firms with existing export track records are typically approved within two to four weeks. First-time applicants or applications involving unusual product combinations may take longer.

Step 4: Import under the certificate

With the DİİB in hand, you import polymer through Turkish customs. At the point of entry, present the certificate number to the customs authority. All applicable duties — MFN, anti-dumping, KDV — are suspended rather than collected. The import is recorded against the certificate's import quota.

Your customs broker (gümrük müşaviri) manages the declaration process and ensures the import is properly recorded under the DIR certificate in the customs system (BİLGE).

Step 5: Process and export

Convert the imported polymer into finished goods and export them within the certificate period. Standard certificates allow 12 months from issuance, which can be extended in certain cases (complex manufacturing processes, large project-based production). The export must be documented through standard export declarations registered in the customs system.

Step 6: Close the certificate

Within three months after the certificate period expires, you must apply for closure (kapatma) of the DİİB by submitting export documentation to the relevant Regional Directorate (Bölge Müdürlüğü). The closure process verifies that:

• Export quantities match the committed volumes (adjusted for approved conversion ratios)
• The foreign exchange usage ratio is within the committed parameters
• All imported material is accounted for — either as exported finished product, documented production waste, or (if applicable) material returned to customs control

Once the certificate is successfully closed, the duty suspension becomes permanent. The suspended duties are never collected.

The conversion ratio (sarfiyat oranı or verimlilik oranı) is the most technically important element of any DIR certificate. It defines how much raw material you are permitted to import per unit of finished product exported. Getting it wrong — in either direction — creates compliance problems.

How conversion ratios work

If your production process converts 1,050 kg of polyethylene pellets into 1,000 kg of blown film, your conversion ratio is 1.05:1 — meaning 5% of input material is lost as production waste (fire). This ratio must be declared in the DIR application and approved by the Ministry of Trade.

The approved ratio determines your total import entitlement. If your export commitment is 500 MT of blown film, and your approved conversion ratio is 1.05:1, your DIR certificate will authorize import of 525 MT of polyethylene.

Waste rates by conversion process

Typical waste rates for polymer conversion processes, as recognized in Turkish DIR practice:

These ranges are indicative. Your Capacity Report and actual production data establish the specific ratio for your operation. The Ministry references sector-specific circulars (genelge) that set maximum allowable waste rates for different product categories.

The conversion ratio trap

Two problems arise from conversion ratios:

Declaring too high a waste rate. If you declare 10% waste but your actual production runs at 4% waste, you have imported more material than you needed for your export obligation. At certificate closure, the excess must be accounted for — either by exporting additional product, paying duties on the excess, or surrendering the material to customs. Trade inspectors have increased scrutiny of declared-vs-actual waste rates, and companies are required to revise their certificates if actual production values fall below declared rates.

Declaring too low a waste rate. If you declare 3% waste but your actual production runs at 7%, you will not have enough raw material to meet your export commitment. You will need to either purchase additional material (at full duty) or reduce your export obligation — which may trigger compliance issues.

The practical advice: base your conversion ratio on documented production data, not optimistic or pessimistic estimates. The Capacity Report issued by your Chamber of Industry should reflect real operating conditions. If in doubt, a modest buffer (1-2 percentage points above actual historical waste) is reasonable, but declaring the maximum allowable rate when your actual waste is significantly lower will attract scrutiny.

DIR is a powerful tool, but the compliance requirements are precise. The following are the most common mistakes mid-tier converters make.

Failing to export within the certificate period

The certificate period is a hard deadline. If you have not exported the required quantity of finished goods by the expiry date (including any approved extensions), all suspended duties become due immediately — plus interest calculated from the original import date, plus a penalty fine under Article 238 of the Customs Code. This can turn a profitable export transaction into a significant loss.

Mitigation: Build a margin of safety into your production and shipping timeline. If your export order is scheduled for month 11 of a 12-month certificate, any production delay or shipping disruption puts you at risk. Apply for certificate period extensions early if you foresee timing issues. Extensions are generally granted when supported by reasonable justification.

Mixing DIR and domestic-sale inventory

If your company both exports (using DIR-imported material) and sells domestically (using material imported at full duty, or domestic material), you must maintain separate inventory tracking for DIR and non-DIR material. Physical segregation is ideal. At minimum, your accounting system must clearly distinguish DIR-imported material from other inventory at every stage: receipt, warehouse allocation, production batch, and shipment.

Commingling DIR and non-DIR material creates an audit nightmare. If customs authorities cannot verify which finished goods used DIR material and which used duty-paid material, the default assumption works against you.

Using DIR-imported material for domestic sales

This is the most serious violation. Diverting DIR-imported raw material — or finished goods produced from DIR material — to the domestic market is customs fraud. Penalties include recovery of all suspended duties with compounding interest, administrative fines that can reach multiples of the duty amount, and potential criminal prosecution under anti-smuggling laws (Kaçakçılıkla Mücadele Kanunu).

There is no gray area here. If your production plan changes and you need to sell domestically instead of exporting, the correct procedure is to pay the applicable duties on the diverted material before or concurrent with the domestic sale, and document the change with customs. Attempting to sell DIR material domestically without settling duties is the single highest-risk compliance mistake a converter can make.

Incorrect or unsubstantiated conversion ratios

As discussed in the conversion ratio section above, significant discrepancies between declared and actual waste rates create compliance exposure. The Ministry of Trade and customs authorities conduct periodic audits (sonradan kontrol) of DIR certificates, and conversion ratio accuracy is a primary audit focus.

Failing to close certificates properly

The certificate closure process is not optional and is not automatic. You must actively apply for closure within three months of the certificate period's end, submitting all required export documentation. Failure to close out certificates triggers enforcement action: the Ministry treats unclosed certificates as unfulfilled export obligations, with the same duty-plus-interest-plus-penalty consequences as failure to export.

Even if you have fulfilled your export obligation completely, failure to submit the closure documentation on time creates a compliance gap that must be resolved — often at significant administrative cost and delay.

For Turkish converters with meaningful export activity, DIR fundamentally changes the origin comparison for polymer procurement. The duty burden that normally makes Chinese resin uncompetitive against EU and domestic alternatives disappears entirely.

Consider the comparative landed costs for HDPE at approximately $1,000/MT CIF:

Under DIR, Chinese polymer becomes the lowest-cost option available to Turkish converters. The structural feedstock advantage of Chinese CTO and PDH producers — which delivers lower FOB pricing than naphtha-dependent European, Middle Eastern, and domestic producers — flows through directly to the Turkish converter's cost structure without being absorbed by duties.

This is not a marginal difference. For a converter producing PE film for export, the raw material cost advantage of Chinese HDPE under DIR versus EU-origin HDPE under the Customs Union is approximately $300-350/MT. On a production line consuming 200 MT per month, that is $60,000-70,000 in monthly raw material savings — savings that translate directly into either higher margins on export contracts or more competitive pricing in destination markets.

Which export sectors benefit most?

Turkish converters serving the following export markets are natural DIR beneficiaries:

Flexible packaging for food and beverage. Turkey is a significant exporter of packaging materials to Europe, the Middle East, and North Africa. PE and PP film producers with export-oriented order books are primary DIR users.

Plastic pipe and fittings. Turkey's construction materials export sector includes substantial pipe production, particularly HDPE and PVC pipes for infrastructure projects in the Middle East, Central Asia, and Africa.

Automotive components. Plastic parts and sub-assemblies for the Turkish automotive sector — which exports heavily to the EU — use significant volumes of engineering and commodity polymers.

Consumer goods and household plastics. Injection-molded products, household containers, and consumer goods produced for export markets across the MENA region and Central Asia.

Woven and nonwoven products. PP woven sacks, geotextiles, and nonwoven fabrics produced for export consume substantial polypropylene volumes.

DIR is not available to every Turkish polymer buyer. The regime categorically excludes:

• Companies selling exclusively to the Turkish domestic market. If none of your production is exported, DIR does not apply. There is no workaround for this requirement.
• Importers without processing capability. Pure trading companies that import and resell resin without conversion cannot use DIR, because there is no manufacturing transformation linking the import to an export.
• Companies without İhracatçı Belgesi registration. Exporter registration is a prerequisite. Unregistered firms must complete the registration process before applying.

The practical reality of split production

Many mid-tier Turkish converters do not export 100% of their production. A typical profile might be 60-80% domestic sales and 20-40% exports. DIR applies only to the export portion. This creates a split-sourcing structure:

• For export production: Import Chinese polymer under DIR at effectively zero duty. This portion of your raw material procurement benefits from the full CTO/PDH cost advantage.
• For domestic production: Source from PETKIM, EU origins (zero duty under Customs Union), or pay the full duty stack on Chinese or other non-preferential origin material.

Managing this split requires disciplined inventory control and production planning. You need to track which raw material batches feed which production runs, and ensure that DIR-imported material is allocated exclusively to export orders. Your ERP system and warehouse management practices must support this segregation.

The complexity is real, but the economics are compelling. A converter running 70% domestic and 30% export, consuming 300 MT of PE per month, saves approximately $148,000 annually on the 90 MT per month imported under DIR — even after accounting for the administrative costs of certificate management. For most mid-tier firms, that savings justifies the operational overhead of maintaining separate inventory streams.

If you have export activity — or are considering expanding into export markets — and you currently source polymer at full Turkish duty rates, DIR deserves serious evaluation. Here is the practical path forward.

First, confirm your export ratio. Review your sales records for the past 12-24 months. What percentage of finished product (by weight or value) was exported versus sold domestically? If exports represent 15% or more of production, DIR is almost certainly worth pursuing.

Second, register as an exporter if you have not already. Contact your regional İhracatçı Birliği to obtain İhracatçı Belgesi. This is a prerequisite for DIR and the process is straightforward.

Third, engage a gümrük müşaviri experienced with DIR. The application and compliance process is manageable, but the technical details — conversion ratios, foreign exchange usage ratios, certificate closure requirements — benefit from professional guidance, particularly for first-time applicants. Choose a customs broker who handles DIR certificates regularly, not one for whom it is an occasional service.

Fourth, calculate your specific savings. Use the landed cost framework from Article 2 in this series, but replace the duty burden with zero for the DIR-eligible portion of your imports. Compare the resulting landed cost against your current procurement costs. The delta is your annual savings potential.

Fifth, start with a single certificate. For your first DIR experience, apply for a certificate covering one specific export order or a defined three-to-six-month production run. This limits your compliance exposure while you learn the process. Scale up to larger and longer-duration certificates as you build experience and administrative capability.

Understanding when DIR applies and when standard duties apply is central to optimizing polymer procurement costs in Turkey. The regime does not eliminate the duty challenge for domestic sales, but for export-oriented production, it transforms Chinese resin from an uncompetitive option into the lowest-cost origin available. Combined with the landed cost analysis in Article 2 and the anti-dumping framework in Article 1, Turkish converters have the tools to make informed sourcing decisions across their full production mix.

---

Kantor Materials International provides procurement intelligence and sourcing services for polymer buyers across emerging markets. For current Chinese polymer pricing, origin comparison analysis, and buyer-specific landed cost modeling, contact our research desk.