Turkish customs increased the declared value of your imported goods? Learn how importers can challenge customs valuation adjustments in Turkey in 2026, prove transaction value, dispute reference pricing, appeal additional duties and take the case to tax court.

When Turkish customs authorities increase the declared customs value of imported goods, the financial consequences can be significant. A higher customs value may increase not only ordinary customs duty but also other import taxes and financial liabilities calculated on the value of the goods. For foreign manufacturers, multinational companies and importers operating with large or recurring shipments, a valuation adjustment applied to one customs declaration may also create concern that previous or future imports will be reviewed on the same basis.

However, the fact that Turkish customs considers the declared price too low does not automatically mean that the authority can replace it with any value it considers appropriate. Turkish customs valuation is governed principally by Customs Law No. 4458 and the Customs Regulation, and the applicable valuation methods must be followed according to the statutory framework. The Ministry of Trade confirms that the primary method is the transaction value method, followed, where that method cannot legally be used, by the transaction value of identical goods, transaction value of similar goods, deductive value, computed value and finally the fall-back method.

For an importer facing an unexpected customs valuation increase in 2026, the central questions should therefore be: Why was the transaction value rejected? Which valuation method did customs use instead? What evidence supports the increased value? Can the importer prove the actual commercial price?

What Is Customs Value in Turkey?

Customs value is the value used as the basis for calculating ad valorem customs duties and for applying certain trade-related measures. It should not automatically be confused with an estimated retail value, domestic Turkish market price or an arbitrary reference price.

Under the Turkish customs valuation framework, the starting point is generally the transaction value, meaning the price actually paid or payable for goods sold for export to Turkey, subject to the legally required conditions and adjustments.

The transaction value may need to be adjusted by particular amounts specified by customs legislation. These may include certain commissions and brokerage expenses, packing costs, assists supplied by the buyer, qualifying royalties and licence fees, certain proceeds accruing to the seller, and transport and insurance costs up to the relevant place of introduction into Turkey. Importantly, the Ministry of Trade states that additions under Article 27 of Customs Law No. 4458 must be based on objective and quantifiable data, and no additions should be made beyond those permitted by the legislation.

This principle can be extremely important when challenging an increased customs value.

Why Do Turkish Customs Authorities Increase Customs Value?

Customs authorities may question the declared value for many reasons. A relatively low invoice price compared with other imports may trigger additional scrutiny, but valuation disputes can also arise from related-party transactions, royalties, licence fees, commissions, assists, transfer-pricing arrangements, discounts or unusual contractual structures.

The authorities may also suspect that the commercial invoice does not represent the complete amount actually paid or payable to the seller. For example, the importer may have made another payment to the seller or a related party that customs considers connected with the imported goods.

Another common problem occurs when customs believes that the relationship between the buyer and seller influenced the transaction price. This is particularly relevant to multinational corporate groups in which the Turkish importer purchases goods from a foreign parent company, subsidiary or affiliated manufacturer.

None of these circumstances should automatically be treated as proof that the declared value is incorrect. The factual and legal basis of the customs authority’s concern should be identified first.

Can Turkish Customs Reject the Invoice Value?

Potentially, but the transaction value cannot simply be disregarded without considering the applicable legal conditions.

The transaction value method occupies the first position in the statutory valuation hierarchy. According to the Ministry of Trade’s official guidance, the other valuation methods should be considered sequentially where a condition prevents use of the transaction value method. A subsequent method should not be used where customs value can lawfully be determined under an earlier method.

Therefore, where customs increases the value, the importer should ask why the transaction value method was considered unavailable.

The company should examine whether the administration has identified a genuine legal obstacle to accepting the transaction value or has simply concluded that the invoice appears lower than expected.

That distinction can materially affect the defense.

What Is the Transaction Value Method?

The transaction value is generally based on the price actually paid or payable for the imported goods when sold for export to Turkey, subject to the statutory requirements and adjustments.

The importer should therefore be prepared to demonstrate that the declared transaction genuinely occurred at the price shown on the customs declaration.

Evidence can include the sales agreement, purchase order, commercial invoice, bank transfer records, SWIFT documentation, accounting records, correspondence between buyer and seller, price lists, shipping documentation and other records demonstrating the commercial transaction.

The stronger the documentary chain connecting the contract, invoice, payment and imported goods, the more effectively the importer can explain the commercial reality of the declared value.

What If Customs Says the Price Is Too Low?

A low price alone does not necessarily mean that the transaction is fictitious.

There may be legitimate commercial reasons why one importer pays less than another. These can include purchasing volume, long-term supplier relationships, liquidation sales, product quality, obsolete inventory, seasonal discounts, geographic market strategy, advance payment, negotiated rebates or differences in contractual responsibilities.

The importer should therefore be able to explain commercially unusual pricing.

For example, if a foreign manufacturer gives its Turkish distributor a 25% volume discount because the distributor purchases substantially larger quantities than other customers, the contractual and commercial evidence supporting that discount should be preserved.

The issue is not simply whether the price looks low. The question is whether the declared customs value complies with the statutory valuation rules.

Can Customs Use Reference Prices?

Reference or comparative information may become relevant during a customs valuation investigation, particularly when the administration has doubts concerning the declared value. However, reference information should not automatically replace the statutory customs valuation methodology.

Where customs relies on another import as a comparison, the importer should examine whether the goods are actually identical or similar and whether the transactions are commercially comparable.

Differences in quantity, commercial level, origin, brand, quality, specifications, timing and contractual conditions can materially affect price.

A comparison between a small retail-oriented shipment and a large wholesale transaction may therefore be misleading.

If customs has used another declaration to increase the value, the importer should investigate the basis of that comparison rather than simply accepting the resulting figure.

What Happens If the Buyer and Seller Are Related Companies?

Related-party transactions are a major customs valuation issue for multinational businesses.

The mere existence of a relationship between buyer and seller does not necessarily mean that the declared transaction value must automatically be rejected. The critical question is whether the relationship influenced the price in a manner relevant under customs valuation rules.

Foreign companies should therefore be prepared to explain how the intercompany price was established.

Evidence may include transfer-pricing policies, intercompany agreements, comparable sales, pricing formulas, financial documentation and evidence showing sales to unrelated customers.

However, importers should remember that corporate tax transfer pricing and customs valuation are related but distinct legal areas. A transfer price accepted for corporate income tax purposes is not automatically decisive for customs purposes.

Can Transfer Pricing Adjustments Affect Customs Value?

Potentially, yes.

Multinational companies sometimes make year-end transfer-pricing adjustments after imported goods have already cleared customs. These adjustments can create complicated questions concerning whether the customs value originally declared remains correct.

A downward transfer-pricing adjustment may lead the company to investigate whether customs duties were overpaid. An upward adjustment may create concern regarding potential additional customs liability.

The legal effect depends on the structure of the pricing mechanism, contractual arrangements and relationship between the adjustment and the imported goods.

Companies using periodic transfer-pricing adjustments should therefore coordinate their tax and customs compliance strategies rather than treating them as entirely separate functions.

Are Royalties and Licence Fees Included in Customs Value?

Sometimes.

The Ministry of Trade’s customs valuation guidance confirms that royalties and licence fees relating to the goods being valued may be added where the buyer must pay them, directly or indirectly, as a condition of sale and where they have not already been included in the price actually paid or payable.

This means that not every royalty payment made by an importer automatically belongs in customs value.

The legal analysis should examine the relationship between the royalty and the imported goods, whether payment is a condition of sale, who receives the payment and whether it is already reflected in the transaction price.

Royalty disputes can become particularly significant for branded consumer goods, technology products, pharmaceuticals, manufacturing licences and franchise-related imports.

Are Freight and Insurance Included in Customs Value?

Certain transportation and insurance expenses are relevant to customs value.

According to the Ministry of Trade, transport and insurance costs up to the place where the goods are brought into the Turkish customs territory are included under the applicable valuation framework. By contrast, qualifying transport and insurance charges after arrival may be excluded where they are separately shown from the price actually paid or payable.

Importers should therefore review Incoterms, freight invoices, insurance documentation and contractual allocation of transportation costs when customs challenges the declared value.

An incorrect understanding of logistics costs can lead either to underpayment or overpayment of customs duties.

What Costs Should Not Be Added to Customs Value?

The Ministry of Trade’s official guidance identifies several amounts that may be excluded where the statutory conditions are satisfied and the amounts are distinguished from the price actually paid or payable.

For example, certain post-import transport and insurance expenses and qualifying construction, erection, assembly, maintenance or technical-assistance costs undertaken after entry into the customs territory may be excluded.

This distinction is particularly important for imported industrial plants, machinery and complex equipment where the overall commercial contract may contain both the imported equipment price and substantial post-import installation or engineering services.

Foreign companies should therefore avoid declaring the entire contract value as customs value without examining which components legally belong in the customs valuation base.

What Happens If the Transaction Value Is Lawfully Rejected?

Where the transaction value cannot legally be used, customs should proceed through the statutory valuation methods.

The Ministry of Trade identifies six methods: transaction value, transaction value of identical goods, transaction value of similar goods, deductive value, computed value and the fall-back method. The methods are generally applied sequentially, although the order of the deductive and computed value methods may be reversed upon the declarant’s written request where customs accepts that request.

This hierarchy can provide an important defense.

If customs jumps directly to an arbitrary estimated value without properly addressing the statutory methods, the legal basis of the assessment should be examined carefully.

What Is the Identical Goods Method?

Where transaction value cannot be used, customs may examine the transaction value of identical goods imported under legally relevant comparable circumstances.

However, “identical” should not simply mean that the products appear broadly similar.

Relevant characteristics, physical characteristics, quality, reputation and country of production may become important. Commercial level and quantity differences may also need to be considered.

The importer should therefore ask what comparator customs used and whether it is genuinely appropriate.

What Is the Similar Goods Method?

If customs value cannot be determined using identical goods, the transaction value of similar goods may potentially be considered under the statutory hierarchy.

Again, commercial comparability matters.

Two products may perform similar functions but have significantly different values because of quality, materials, brand reputation, specifications or production costs.

Importers challenging a valuation based on allegedly similar goods should therefore obtain detailed information about the comparison used by customs whenever procedurally available.

What Is the Deductive Value Method?

The deductive method generally works backward from the price at which imported goods or qualifying identical or similar goods are sold in Turkey, making the deductions required under the applicable valuation rules.

This method can involve detailed commercial and accounting information.

The importer may need to establish domestic selling prices, commissions, profit margins, transportation expenses and other relevant elements.

Because these calculations can materially affect customs value, companies should ensure that customs uses commercially accurate data rather than assumptions that do not reflect the actual Turkish market transaction.

What Is the Computed Value Method?

Computed value generally involves constructing a customs value from relevant production costs, profit and other legally relevant elements.

For foreign manufacturers, this can require commercially sensitive information concerning production costs and margins.

Where this method becomes relevant, cooperation between the Turkish importer and overseas manufacturer can be essential.

The importer should also verify that the elements used by customs correspond to the requirements of the applicable valuation rules.

Can an Importer Challenge the Increased Customs Value?

Potentially, yes.

The first step is to obtain the formal customs assessment or decision and identify the notification date. The importer should determine precisely how customs calculated the increased value and which valuation method was used.

The company should then prepare evidence supporting its declared value or demonstrating why the alternative method used by customs was legally or factually incorrect.

Where the resulting customs duties or administrative decisions fall within the objection framework of Article 242 of Customs Law No. 4458, the applicable administrative objection period is generally 15 days from notification.

Because this period is short, foreign companies should not allow internal approval processes or extended discussions with the customs broker to consume the available objection period.

What Should a Customs Valuation Objection Contain?

A strong objection should explain the transaction rather than merely stating that the increased value is excessive.

The submission should identify the customs declaration, disputed assessment, original customs value, value determined by customs and financial difference. It should then explain why the transaction value satisfies the legal requirements or why customs incorrectly applied a subsequent valuation method.

Supporting documentation may include contracts, invoices, bank transfers, price lists, correspondence, purchase orders, accounting records, intercompany agreements, royalty agreements, transfer-pricing documentation and comparable commercial transactions.

Where the goods are technically complex, product specifications may also be relevant because differences between allegedly comparable goods can explain significant price variations.

What If the Increased Value Has Already Been Paid?

Payment does not necessarily mean that an incorrect valuation can never be challenged.

Where an importer ultimately establishes that customs duties were collected in excess of the amount legally payable, the repayment and remission provisions of Customs Law No. 4458 may need to be examined.

A refund claim should clearly establish the value used by customs, the customs value that should legally have applied and the resulting overpayment.

Importers should also monitor the applicable repayment deadlines rather than waiting for the outcome of unrelated future imports.

Can a Customs Valuation Dispute Be Taken to Tax Court?

Potentially, yes.

Where the required administrative objection procedure has been completed and the dispute remains unresolved, judicial review may be available before the competent Turkish tax court.

The litigation may require the court to examine whether customs lawfully rejected transaction value, whether the statutory valuation hierarchy was followed and whether the alternative value was supported by legally sufficient evidence.

The administrative objection period and subsequent litigation deadline should be monitored separately.

Can the Customs Value Increase Lead to a Penalty?

Potentially.

Where the authority concludes that the incorrect customs value caused underpayment of customs duties, additional customs debt may be accompanied by an administrative monetary penalty under the applicable provisions of Customs Law No. 4458.

The importer should analyze the additional duty and penalty separately.

Even where customs establishes that additional tax is payable, this does not mean that every associated penalty is automatically lawful. The specific statutory basis and conditions of the penalty should also be reviewed.

Where authorities allege intentional false invoicing or other serious misconduct, separate risks under anti-smuggling or criminal legislation may arise. An ordinary valuation disagreement should therefore be distinguished carefully from an allegation of deliberate customs fraud.

What Changed in Turkish Customs Practice in 2026?

The basic customs valuation methodology remains based on Customs Law No. 4458 and the Customs Regulation. The Ministry of Trade’s current official guidance continues to identify the transaction value as the first valuation method and requires the statutory methods to be considered in sequence.

At the same time, Turkey’s wider import framework has continued to change in 2026. On 11 July 2026, amendments to the Import Regime Decision and the Additional Customs Duty framework were published in the Official Gazette. The Ministry’s consolidated Additional Customs Duty Decision was subsequently updated on 17 July 2026.

These changes matter in valuation disputes because an increase in customs value can magnify the financial effect of the applicable ad valorem customs duty and Additional Customs Duty. Companies should therefore calculate the consequences using the GTIP, origin and rates legally applicable to the specific declaration date.

The Ministry also maintains its current 2026 customs circulars and customs implementation materials, which should be checked when evaluating a contemporary customs dispute.

Should Previous Imports Be Reviewed?

Yes, particularly where the same pricing method has been used repeatedly.

If customs challenges the transaction value of one shipment, the authority may potentially examine earlier declarations involving the same supplier, products or intercompany pricing structure.

A company should therefore assess whether the disputed issue is isolated or systematic.

Historical review may reveal additional customs exposure, but it may also reveal circumstances where customs duties were previously overpaid.

For multinational businesses, a customs valuation dispute should often trigger coordinated review by legal, customs, finance and tax teams.

What Are the Biggest Mistakes Importers Make in Customs Valuation Disputes?

One of the biggest mistakes is assuming that an invoice alone conclusively proves customs value. The importer should be able to demonstrate the entire commercial transaction, including the agreement, payment and any related payments.

Another mistake is assuming that a transfer-pricing report automatically proves that an intercompany customs value is correct. Customs valuation has its own statutory rules.

Importers also sometimes accept a higher value simply to obtain immediate release of goods without considering how that decision may affect subsequent shipments. Where the same goods are imported regularly, an unresolved valuation issue can become a recurring financial problem.

Finally, companies should not allow informal negotiations to cause them to miss statutory objection deadlines.

Frequently Asked Questions About Customs Value Increases in Turkey

1. Can Turkish customs increase the value shown on my commercial invoice?

Potentially, but customs valuation must follow the methods and requirements established under Customs Law No. 4458 and the Customs Regulation. The transaction value is generally the starting point and cannot simply be replaced by an arbitrary figure.

2. What should I do if Turkish customs says my invoice price is too low?

Request the basis of the valuation decision and gather evidence establishing the commercial transaction, including the sales agreement, invoice, payment records, price lists and correspondence explaining any legitimate discounts.

3. Can customs use another importer’s price to increase my customs value?

Comparable transactions may become relevant under certain valuation methods, but the legal requirements for identical or similar goods must be satisfied. Quantity, commercial level, quality, specifications and other differences may affect comparability.

4. Does being related to the foreign seller mean customs can automatically reject the invoice price?

No. A related-party relationship requires careful valuation analysis, but the existence of the relationship does not by itself mean that every declared transaction value is invalid.

5. Are royalties automatically included in Turkish customs value?

No. The statutory requirements must be satisfied. The Ministry of Trade states that qualifying royalties and licence fees are included where they relate to the goods and must be paid as a condition of sale, to the extent they are not already included in the price.

6. Can post-import installation costs be excluded from customs value?

Potentially, yes. Qualifying construction, erection, assembly, maintenance or technical-assistance costs undertaken after entry may be excluded where the statutory conditions are satisfied and the amounts are separately distinguished.

7. How long do I have to object to an increased customs value?

Where the Article 242 administrative objection mechanism applies, the objection period is generally 15 days from notification. The particular assessment and notification date should be checked immediately.

8. Can I recover customs duties if I already paid the increased assessment?

Potentially, where the increased valuation is successfully challenged or it is otherwise established that customs duties were collected in excess. The applicable repayment and remission procedures and deadlines must be examined.

9. Can a customs valuation dispute be taken to court in Turkey?

Potentially, yes. Following the applicable administrative procedure, qualifying valuation disputes may be challenged before the competent Turkish tax court within the relevant litigation period.

10. Can a foreign company challenge a customs valuation increase without travelling to Turkey?

In many cases, the appropriate administrative and judicial procedures can be handled through an authorized Turkish lawyer, subject to the necessary power-of-attorney and document formalities.

Legal Support for Customs Valuation Disputes in Turkey

A customs valuation increase can have consequences far beyond a single shipment. Where the same supplier, pricing structure or valuation methodology is used repeatedly, one customs decision may create substantial exposure across historical and future imports. For that reason, the legal analysis should examine not only the amount demanded by customs but also why the transaction value was rejected, which alternative valuation method was applied, whether the statutory hierarchy was respected and whether the authority’s calculations are supported by objective evidence.

Foreign importers should also carefully review related-party pricing, royalties, licence fees, freight, insurance, assists, discounts and transfer-pricing adjustments before accepting an increased customs value. Where additional customs duties or penalties result from the valuation adjustment, each component should be reviewed separately.

Our law office provides professional legal assistance concerning customs valuation disputes, increased customs values, transaction value challenges, related-party imports, royalty and licence-fee disputes, transfer-pricing adjustments, additional customs assessments, administrative objections, customs refund claims and tax court proceedings in Turkey.

Fırat Fesih Kaya assists foreign importers, international manufacturers, investors and multinational companies with reviewing customs valuation decisions, preparing supporting commercial evidence, challenging additional assessments and pursuing available administrative and judicial remedies in Turkey.

Phone: +90 312 434 22 22
Mobile: +90 532 769 22 22
Email: info@firatfesihkaya.av.tr
Address: Mevlana Boulevard No: 221, Yıldırım Tower No: 148, 06520 Balgat, Çankaya, Ankara, Turkey

For professional legal support concerning a customs value increase or customs valuation dispute in Turkey in 2026, you may contact our law office for a case-specific review of the transaction value, customs assessment, supporting documents, objection deadline and available administrative or judicial remedies.