Glossary / Cumulation of Origin
Cumulation of Origin — explained
Cumulation of origin is a system that allows countries which have a free trade agreement between them and apply the same rules of origin to use inputs originating in each other’s territory in production, without the finished product losing its preferential origin.
The main framework Türkiye is part of is the Regional Convention on pan-Euro-Mediterranean preferential rules of origin; the Convention was opened for signature on 15 June 2011 and entered into force for Türkiye on 1 February 2014. Cumulation works in two basic forms: bilateral cumulation between two countries, and diagonal cumulation among multiple countries applying a common set of rules.
Bilateral cumulation is the simplest form of the model and works only between two parties: two countries with a free trade agreement between them can use inputs originating in each other’s territory in their own production, and the resulting product qualifies for preferential trade when exported to the other party. Diagonal cumulation, on the other hand, covers more than two countries — as in the pan-Euro-Mediterranean system, an input originating in any country linked by similar agreements may be used in the manufacture of the final product.
Diagonal cumulation requires three conditions to be met together. Updated free trade agreements must be in force between all the countries involved — the country of export, the country of destination and the countries where origin was acquired; those countries must apply the same set of rules of origin; and the arrangement must have been formally notified through the Convention’s Joint Committee and the relevant internal approval procedures. Unless all three are satisfied, diagonal cumulation is not established between two countries even if both are party to the same Convention.
Which pair of countries can actually cumulate is read from the diagonal cumulation matrix published by the Ministry of Trade. The current table, shared in the Ministry’s announcement dated 31 December 2025, groups countries according to the version of the rules of origin they apply and has been valid since 1 January 2026; the transition period during which the old and revised rules were applied together ended on 31 December 2025. Because the matrix is updated periodically, the table current on the day should be checked when planning a shipment.
When You Encounter It
Cumulation comes into play whenever an exporter manufactures its own product using imported inputs. If the finished product cannot satisfy the rule of origin on its own — that is, if the proportion or degree of processing of the imported input is not enough — the fact that the input originates in a country included in the cumulation area can change the outcome, and the product may acquire preferential origin. This assessment is made before loading; changing the origin claim after the document has been issued means starting a new documentation process.
The claim is set down on paper through a EUR.1 movement certificate or a statement on origin. The authority stamps the certificate based on the exporter’s declaration, but the real test takes place at the destination: the buyer’s customs authority can question the origin claim when applying the preferential tariff, and a subsequent-verification request then comes back to Türkiye. This is why, when origin is acquired through cumulation, keeping the proof of origin for the imported input in the exporter’s file matters. The documentation set-up on the shipment side is explained in our Export Customs Clearance service.
What It Doesn't Cover
- Cumulation does not remove the rule of origin. It is not enough on its own that the input originates in a country included in the cumulation area; the final product must also have undergone sufficient working or processing in that country, and operations counted as minimal — such as simple packaging, labelling or sorting — do not confer origin.
- Cumulation is not a document, it is a rule. There is no separate "cumulation certificate" issued; the outcome is embedded within the EUR.1 or the statement on origin that is issued.
- Cumulation has nothing to do with the A.TR movement certificate. The A.TR shows that goods are in free circulation between the European Union and Türkiye; it does not show origin. Cumulation of origin belongs to the domain of documents carrying a preferential origin claim.
Often Confused With
| Comparison | Difference |
|---|---|
| Cumulation of Origin vs Bilateral Cumulation | Bilateral cumulation works only between two countries and only for inputs originating in those two countries. Diagonal cumulation, on the other hand, covers the whole group of countries bound by the same rules of origin; an input originating in a third country can also be taken into account. |
| Cumulation of Origin vs Certificate of Origin | Certificate of Origin is a document that certifies which country goods originate from. Cumulation of origin, on the other hand, is the rule that determines how that origin was acquired — one records the outcome, the other governs how the outcome came about. |
| Cumulation of Origin vs Western Balkans Cumulation of Origin | The Western Balkans cumulation zone covers Türkiye and the European Union together with Albania, Bosnia and Herzegovina, North Macedonia, Montenegro and Serbia. Following the entry into force of the Regional Convention, this area has become part of the pan-Euro-Mediterranean system. |
Frequently Asked Questions
What is cumulation of origin?+
It is a system that allows countries which have a free trade agreement between them and apply the same rules of origin to use inputs originating in each other’s territory in production and to preserve the finished product’s preferential origin. Its purpose is to prevent the loss of preferential tariff treatment when a supply chain extends across more than one country.
What is diagonal cumulation of origin?+
It is the ability, where more than two countries are bound by the same rules of origin, to use an input originating in any one of those countries in manufacturing the finished product. Unlike bilateral cumulation, the input can come from anywhere in the cumulation area, not only from the other party.
Which countries does pan-Euro-Mediterranean cumulation of origin cover?+
The system covers Türkiye, the member states of the European Union, the EFTA countries (Switzerland, Liechtenstein, Iceland, Norway), the Faroe Islands, and Algeria, Morocco, Palestine, Israel, Lebanon, Egypt, Tunisia and Jordan. A country’s membership of the system does not mean diagonal cumulation is possible with every other country pair; the combinations that are actually available can be seen in the matrix published by the Ministry of Trade.
Which countries does Western Balkans cumulation of origin cover?+
Türkiye, the European Union, Albania, Bosnia and Herzegovina, North Macedonia, Montenegro and Serbia. Following the Regional Convention, this area is treated as part of the pan-Euro-Mediterranean system and is subject to the same set of rules.
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Where This Term Comes Up in Our Work
Cumulation of Origin is one of the documents we track in our export customs clearance service.
Export Customs ClearanceExport declarations, movement certificates, and port procedures.The Turkish original of this page was reviewed by our licensed customs broker. This translation is provided for information; the Turkish version prevails.
Source
Republic of Türkiye Ministry of Trade — Diagonal Cumulation Opportunities under the Pan-Euro-Mediterranean Preferential Rules of Origin — The diagonal cumulation matrix shared in the Ministry’s announcement dated 31 December 2025 has been valid since 1 January 2026 and is updated periodically.
Last updated: August 22, 2026