Year-End Transfer Pricing Adjustments and Turkish Customs Duties: Multinational Company Guide — 2026 Current Guide

How do year-end transfer-pricing adjustments affect Turkish customs duties? Learn the rules for upward and downward true-ups, customs valuation, documentation, refunds and audits in 2026.

Multinational companies often adjust intercompany prices at the end of the financial year to achieve an arm’s-length profit margin. These adjustments may take the form of debit notes, credit notes, rebates or intercompany settlement entries.

For Turkish importers, a year-end transfer-pricing adjustment may also create customs consequences. If the adjustment increases the price of imported goods, Turkish Customs may claim that the customs value was under-declared. If the adjustment decreases the price, the importer may seek repayment, but a refund is not automatic.

The tax treatment and customs treatment must be analysed separately. A transfer-pricing adjustment accepted by the tax authorities does not automatically determine the customs value.

What Is a Year-End Transfer-Pricing Adjustment?

A year-end transfer-pricing adjustment is a post-period correction between related companies. It is normally used to align the profitability of a distributor, manufacturer or service company with an agreed arm’s-length range.

Common forms include:

• Debit notes;
• Credit notes;
• Year-end rebates;
• Target-margin true-ups;
• Cost-plus adjustments;
• Resale-price adjustments;
• Compensation for losses;
• Inventory adjustments;
• Intercompany settlement entries;
• Retroactive price revisions.

The adjustment may cover imported goods, domestic sales, services, royalties or financing. Customs treatment depends on which part of the adjustment relates to imported products.

Why Can Customs Be Concerned?

Turkish Customs may investigate whether a year-end adjustment represents part of the price actually paid or payable for imported goods.

Questions may include:

• Was the adjustment foreseeable at the time of importation?
• Was there a written pricing formula?
• Does the adjustment relate to specific goods?
• Was the payment made to the seller?
• Does the adjustment cover imported and locally produced products?
• Were all required customs-value additions declared?
• Did the adjustment increase or reduce the price?
• Was the amount recorded in the importer’s accounts?
• Did the relationship between the parties influence the price?

The Turkish Ministry of Trade explains the transaction-value method and alternative valuation methods in its official customs valuation guidance.

Upward Adjustments and Additional Customs Duty

An upward adjustment increases the amount ultimately paid to the foreign supplier or parent company.

Examples include:

• A debit note to achieve a minimum profit margin;
• A year-end increase in the price of imported inventory;
• A cost-plus adjustment;
• A payment based on actual production costs;
• A retroactive price correction;
• An additional amount allocated to imported products.

If the adjustment relates to imported goods, Customs may consider it part of the customs value. The importer may then face:

• Additional customs duty;
• Additional customs duties;
• Import VAT;
• Interest;
• Administrative penalties.

The importer should determine whether the adjustment must be allocated to specific import declarations or whether it covers a broader group-company relationship.

Downward Adjustments and Customs Refunds

A downward adjustment reduces the price paid to the foreign supplier.

Examples include:

• A credit note;
• A year-end rebate;
• Compensation for low profitability;
• A reduction due to defective or obsolete goods;
• A commercial discount;
• A reduction under a pre-existing price formula.

A downward adjustment does not automatically create a customs refund. The importer normally must demonstrate that the reduction:

• Relates to imported goods;
• Was required by the original contract;
• Is objectively calculated;
• Can be allocated to identified customs declarations;
• Was not created solely for tax purposes;
• Was genuinely paid or credited by the supplier.

A general group-level profit adjustment may be insufficient if it cannot be connected to particular imports.

Was the Adjustment Known at Importation?

Customs may distinguish between an adjustment that was contractually foreseeable and one negotiated only after the financial year ended.

The importer’s position is generally stronger where:

• The sales agreement contains a clear price formula;
• The target margin was agreed before shipment;
• The parties regularly apply the same mechanism;
• The adjustment is based on objective data;
• The affected products and shipments can be identified;
• The importer expected a later true-up.

A discretionary adjustment, unsupported by a written policy, may be treated differently. The importer should preserve the pricing policy, forecasts, budgets, correspondence and approval records existing before importation.

Product-Specific Allocation

A year-end adjustment may cover:

• Imported goods;
• Locally manufactured goods;
• Domestic services;
• Marketing;
• Royalties;
• Financing;
• Warranty costs;
• Distribution activities.

The importer should separate each category and prepare a product-specific allocation. Potential allocation methods include:

• Imported-unit volume;
• Net sales;
• Customs value;
• Product turnover;
• Gross margin;
• Cost of goods sold;
• Invoice-level allocation;
• Contractual allocation.

The methodology should be reasonable, consistent and supported by accounting data.

Documents Required for a Customs Defence

A multinational company should maintain:

• Intercompany sales agreement;
• Transfer-pricing policy;
• Pricing formula;
• Original invoices;
• Debit and credit notes;
• Purchase orders;
• Bank records;
• Supplier account statements;
• General ledger entries;
• Inventory reports;
• ERP data;
• Profit-margin calculations;
• Cost-plus or resale-price analysis;
• Product and shipment schedules;
• Customs declarations;
• Import VAT records;
• Royalty and service agreements;
• Transfer-pricing report;
• Year-end financial statements;
• Correspondence explaining the adjustment.

The company should prepare a reconciliation connecting the adjustment to each affected product, invoice and customs declaration.

Related-Party Transactions

Where the importer and supplier belong to the same multinational group, Customs may examine whether the relationship influenced the original price or the year-end adjustment.

Relevant evidence may include:

• Group structure;
• Shareholding information;
• Functional analysis;
• Risk allocation;
• Intercompany contracts;
• Comparable prices;
• Resale margins;
• Cost-plus calculations;
• Profit targets;
• Board approvals;
• Year-end adjustment approvals;
• Transfer-pricing benchmarking.

Related-party status does not automatically invalidate the transaction value. The company should show that the pricing process was commercially structured and supported by objective information.

Transfer Pricing Versus Customs Valuation

Transfer-pricing rules generally focus on taxable profits and arm’s-length remuneration. Customs valuation focuses on the value of imported goods for duty and import VAT purposes.

The two systems may therefore produce different outcomes. A tax authority may accept a year-end adjustment as necessary to achieve an arm’s-length margin, while Customs may ask whether the adjustment should have been reflected in import declarations.

Companies should avoid inconsistent statements such as:

• “The price was final at importation” for Customs;
• “The price was provisional and subject to adjustment” for tax authorities.

The correct explanation depends on the contracts, accounting treatment and actual commercial practice.

Customs Additions Beyond the Transfer Price

Customs may also examine whether the year-end adjustment relates to:

• Royalties;
• Licence fees;
• Commissions;
• Free-of-charge materials;
• Tools and moulds;
• Engineering or design work;
• Resale proceeds;
• Freight;
• Insurance.

A debit note labelled “transfer pricing” should not conceal a payment that legally belongs to another customs-value category.

Post-Clearance Audit Risks

Turkish Customs may examine adjustments after the goods have been released. The audit may cover:

• Several financial years;
• Multiple customs declarations;
• Several group companies;
• Import invoices;
• Bank payments;
• Credit and debit notes;
• Transfer-pricing reports;
• Resale data;
• ERP records.

Under the general framework of Customs Law No. 4458, under-assessed customs duties may generally be notified within three years from the date the customs debt arose, subject to statutory exceptions.

The company should identify the precise declarations and periods covered by the audit before producing historical records.

Penalties and Commercial Consequences

If Customs concludes that an upward adjustment should have been included, the importer may face:

• Customs duty difference;
• Import VAT on the revised customs base;
• Additional customs duties;
• Interest;
• Administrative customs penalties;
• Storage and financing costs;
• Contractual claims;
• Internal group disputes.

An accounting mistake or allocation error should be distinguished from intentional undervaluation. Knowingly concealing an additional payment or creating false records may create more serious administrative or criminal risks.

How Can a Multinational Company Respond?

The company should:

1. Identify every year-end adjustment.
2. Separate goods from services.
3. Determine whether the adjustment is upward or downward.
4. Review the original pricing clause.
5. Identify affected import declarations.
6. Prepare a product-level allocation.
7. Reconcile invoices, payments and accounting.
8. Coordinate tax and customs positions.
9. Preserve electronic records.
10. Request clarification from Customs.
11. Avoid unsupported admissions.
12. Obtain Turkish customs-law advice.

The response should be factual, consistent and supported by documents created during the ordinary course of business.

Challenging a Customs Assessment

The importer may challenge:

• The conclusion that the adjustment relates to imported goods;
• The rejection of transaction value;
• The allocation method;
• Inclusion of services or domestic activity;
• Addition of royalties or commissions;
• The calculation of duty and VAT;
• The penalty;
• Notification or limitation defects.

Under Article 242 of Customs Law No. 4458, an objection is generally filed within 15 days from lawful notification of the customs decision.

If the objection is rejected, the importer may bring proceedings before the competent tax court within the applicable procedural period. A separate suspension-of-execution request may be necessary because an objection or lawsuit does not automatically suspend collection.

Settlement may be available for certain customs debts and penalties. The company should compare settlement with litigation, repayment possibilities and contractual recovery from the group supplier.

2026 Compliance Priorities

In 2026, Customs increasingly compares:

• Transfer-pricing reports;
• E-invoices;
• E-ledgers;
• ERP records;
• Bank payments;
• Debit and credit notes;
• Customs declarations;
• Financial statements;
• Resale prices.

Multinational companies should maintain a joint tax-customs adjustment policy, document whether prices are provisional or final and perform a customs impact review before issuing year-end debit or credit notes.

Frequently Asked Questions (FAQ)

1. Does every year-end transfer-pricing adjustment change customs value?

No. It affects customs value only if it relates to imported goods and satisfies the applicable valuation requirements.

2. Must an upward adjustment be reported to Turkish Customs?

Potentially, where it represents additional payment for imported goods. The contract and affected declarations must be analysed.

3. Can a downward adjustment produce a customs refund?

Possibly, but the importer generally needs a direct, objective and documented link to specific imports.

4. Are related-party adjustments automatically rejected?

No. The importer can prove that the original price and adjustment were commercially determined.

5. Can a target-profit adjustment be treated as a customs adjustment?

It may be, if the adjustment effectively changes the price of imported goods. A general profit allocation may be treated differently.

6. What if the adjustment covers imported and domestic products?

The importer should separate the amounts and prepare a reasonable allocation supported by accounting records.

7. Can Customs request the multinational group’s transfer-pricing report?

Yes. The report may be relevant to understanding pricing, related-party transactions and year-end adjustments.

8. Can Customs reassess adjustments after clearance?

Yes. Post-clearance audits may result in additional duty, VAT, interest and penalties.

9. What is the objection deadline?

An objection is generally filed within 15 days from lawful notification under Article 242 of Customs Law No. 4458.

10. Can a company challenge the inclusion of services in a customs adjustment?

Yes. Services, royalties, financing and domestic activities should be separated from the price of imported goods.

This article is intended for general informational purposes only. To avoid any loss of rights, we recommend consulting your lawyer regarding your specific circumstances.

Legal Support for Multinational Customs and Transfer-Pricing Disputes

Fırat Fesih Kaya Law Office advises multinational groups, foreign parent companies, Turkish subsidiaries, importers, manufacturers and distributors on year-end transfer-pricing adjustments and customs valuation.

Lawyer Fırat Fesih Kaya can assist with customs impact reviews, upward and downward true-ups, debit and credit notes, related-party pricing, repayment applications, post-clearance audits, additional-duty assessments, administrative objections and tax-court proceedings.

For urgent legal support:

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