Learn the MERSIS registration process in Turkish company formation law, including online incorporation, founder data entry, foreign shareholder requirements, signature approval, Trade Registry filing, and post-registration compliance in Türkiye.
Introduction
The MERSIS registration process in Turkish company formation law is now the core administrative route for establishing a company in Türkiye. Official guidance published by Invest in Türkiye states that trade registration transactions must be carried out through MERSIS, the Central Registry Record System, and describes MERSIS as the central system for conducting commercial registry processes and storing commercial registry data electronically. The same guidance adds that online establishment of new companies is possible through the system and that already-established companies continue to operate through it after their records are transferred. (Invest in Türkiye)
For founders, investors, and lawyers, this means that Turkish company formation is no longer just a paper-based filing before the Trade Registry. MERSIS functions as the digital backbone of incorporation, but it does not replace the legal steps that still require signature approval, capital payment where applicable, document legalization, and final registration by the Trade Registry Directorate. The official Ministry of Trade guide makes this structure especially clear by listing MERSIS as the electronic platform for establishment while separately identifying signature approval, payment, and registry application as distinct stages of incorporation. (Invest in Türkiye)
This distinction is especially important because many business owners think MERSIS itself “creates” the company. Legally, that is incomplete. MERSIS prepares and routes the company contract and registry data, but the company becomes effective through the registration workflow completed before the Trade Registry Directorate. Official Turkish guidance therefore presents MERSIS not as a substitute for company law formalities, but as the mandatory digital framework through which those formalities begin and are coordinated. (Invest in Türkiye)
For foreign investors, the role of MERSIS is even more significant. Official sources state that foreign real and legal persons are subject to the same incorporation rules as domestic investors, but also make clear that foreign founders must first complete certain tax-number and document-formalization steps before they can be properly entered into the MERSIS workflow. In practice, that is where many delays arise.
This guide explains the MERSIS registration process in Turkish company formation law in a practical, step-by-step way. It covers what MERSIS is, why it matters, how the system works during incorporation, what foreign and domestic founders must enter, how signatures are verified, what documents are submitted for joint stock and limited liability companies, and what legal obligations continue after MERSIS-based registration is completed. (Invest in Türkiye)
What Is MERSIS Under Turkish Company Formation Law?
MERSIS is the abbreviation for the Central Registry Record System used in Turkish commercial registration practice. According to Invest in Türkiye, MERSIS is the central registry system for carrying out commercial registry processes and storing commercial registry data electronically on a regular basis, and a unique number is assigned to legal entities actively involved in business. The Ministry of Trade guide likewise states that establishment procedures are performed electronically on the Central Registry System and that users begin the company establishment process through the MERSIS internet address. (Invest in Türkiye)
The legal importance of MERSIS is not merely technological. Official guidance states that trade registration transactions must be fulfilled through MERSIS pursuant to the Trade Registry Regulation. That makes MERSIS a compulsory procedural platform in ordinary incorporation practice, not an optional convenience tool. In other words, if a company is being formed under the ordinary Turkish corporate regime, MERSIS is part of the legal path to registration. (Invest in Türkiye)
This also explains why MERSIS matters beyond the first day of incorporation. Official guidance states that already-established companies may continue operating through the system after their records are transferred. So MERSIS is not limited to the initial formation stage; it is part of the wider digital registry environment in which commercial entities in Türkiye are recorded and processed. (Invest in Türkiye)
Why MERSIS Matters in Practice
The practical function of MERSIS is that it front-loads company formation. Instead of founders preparing everything offline and appearing only once before the registry, the system requires core corporate data to be structured in advance. The Ministry of Trade guide states that MERSIS directs the user to fill in the legally required elements of the company contract and that the company contract is prepared by entering the necessary information into the system. It also states that the contract is prepared in Turkish and that the company’s potential tax number is automatically assigned by MERSIS.
That matters because legal mistakes in the MERSIS stage often become registration problems later. Errors in the company title, field of activity, shareholder details, director information, capital structure, or representation rules can create inconsistencies with notarized documents, shareholder resolutions, or capital-payment proofs. MERSIS therefore serves as both a digital tool and a compliance filter. This is not an inference from informal practice alone; it follows directly from the fact that official guidance places the company contract preparation and legally required data entry inside the MERSIS workflow itself.
MERSIS also matters because it can materially accelerate incorporation once the file is correct. The Ministry of Trade guide states that company establishment procedures can be completed within one hour if the necessary documents are submitted to the relevant trade registry office, while Invest in Türkiye describes the one-stop-shop process as being completed within the same day. The sensible reading of these official statements is that Turkish law is designed for very fast incorporation when the MERSIS file and supporting documents are accurate and complete.
Which Company Types Use MERSIS?
Official Invest in Türkiye guidance states that the Turkish Commercial Code recognizes several company forms but that the joint stock company (JSC) and limited liability company (LLC) are the most common in practice, and it also states that the procedures to be followed for establishing a JSC or an LLC are the same even though financial thresholds and organs differ. Because MERSIS is the required platform for trade registration transactions, it is central to the incorporation of both JSCs and LLCs. (Invest in Türkiye)
The Ministry of Trade guide reinforces this point by describing the establishment workflow generally and then separately listing the documents required for registration of a joint stock company and the documents required for registration of a limited company. That structure shows that MERSIS is the shared electronic gateway, while the supporting document package varies depending on company type.
Step 1: Create a MERSIS Membership and Start the Incorporation File
The first formal stage in the MERSIS registration process is to open a user account and begin the company establishment file. The Ministry of Trade guide states that users can start the company establishment process by creating a free membership via the MERSIS internet address. This is the digital entry point into Turkish company formation.
At this stage, founders or their advisors typically begin structuring the draft incorporation file: company name, headquarters address, business purpose, shareholders, managers or board members, representation rules, and capital data. The reason this stage is legally significant is that official guidance states MERSIS itself directs the user to fill in the legally required elements of the company contract. So the system is not merely storing data; it is actively organizing the legal foundation of the future company contract.
Step 2: Enter Founders, Shareholders, and Authorized Persons
The next stage is the entry of shareholder and authorized-person information into MERSIS. The Ministry of Trade guide states that, in preparing the company contract on MERSIS, Turkish citizens can be added with their ID numbers and foreigners with their passport numbers as partner or authorized person. This is a key operational point because it shows how MERSIS distinguishes domestic and foreign participants at the data-entry level.
For foreign participants, however, an additional step applies before MERSIS entry is completed. The same official guide states that foreigners must first obtain a tax number from the tax office and register it to MERSIS by applying to the trade registry office. Invest in Türkiye similarly states that the company must obtain potential tax identity numbers for non-Turkish shareholders and non-Turkish board members and that this number is necessary for opening a bank account to deposit company capital.
This is one of the most important practical points in the whole MERSIS registration process. Foreigners are not excluded from Turkish company formation, but they cannot simply be added to the system without the tax-number step. For foreign founders, MERSIS compliance therefore begins partly outside MERSIS itself, with tax-office formalities that make later digital entry legally and technically possible.
Step 3: Prepare the Company Contract in Turkish Through MERSIS
Once the founders and authorized persons are correctly entered, the company contract is prepared through MERSIS. Official Ministry guidance states that MERSIS directs users to fill in the legally required elements of the contract and that the company contract is prepared by entering the necessary information. It also expressly states that the company contract is prepared in Turkish.
This has two legal consequences. First, foreign investors should not assume that an English-language draft or foreign shareholder resolution is enough by itself; the operative contract inside the Turkish establishment workflow is the Turkish-language text created through MERSIS. Second, all supporting documents, including foreign corporate approvals, should match the legal identity of the company as it appears in that Turkish-language MERSIS record.
The Ministry guide also states that the company’s potential tax number is automatically assigned by MERSIS. That means the system does more than generate a draft contract. It also integrates tax-identification functionality into the incorporation stage, which is one reason MERSIS sits at the center of Turkish company formation practice.
Step 4: Signature Approval and Verification
After the contract is prepared, the founders sign it and the signatures are verified by the competent authority. The Ministry of Trade guide states that the founders then sign the contract and that the system verifies whether the signatures actually belong to them. It adds that the founders or their authorized representatives must appear before the relevant authority for this step.
The place of signature approval depends on company type. Official guidance states that, in limited companies and cooperatives, this process is carried out at the Trade Registry Directorate where the company headquarters is located. For other companies, it is possible to apply either to the Trade Registry Directorate where the headquarters is located or to any notary public. The guide further states that if approval is requested at a notary, users apply with the tracking number obtained from MERSIS and there is no need to bring a physical printout because the contract is transmitted electronically by the system.
That detail shows how MERSIS changes practice even where a physical appearance still exists. The traditional notary or registry approval is not eliminated, but the relevant legal text is carried electronically through the MERSIS infrastructure rather than by paper delivery. In that sense, MERSIS is not just a filing portal; it is the transmission channel linking contract preparation and signature validation.
Step 5: Prepare Signature Declarations of Company Officials
Once the company contract is in order, the signatures of the persons authorized to represent the company must be separately approved and signature declarations must be prepared. The Ministry of Trade guide states that this process is carried out in any trade registry office in Türkiye. Invest in Türkiye also lists notarized signature declarations among the required registration materials.
This stage is frequently underestimated, but it matters greatly in practice because the company’s representation structure is part of its legal identity vis-à-vis third parties. MERSIS may structure the internal contract data, but the signatory framework still needs separate procedural completion before the company is fully ready to function in commercial life.
Step 6: Pay the Competition Authority Share and, if Applicable, Cash Capital
Official guidance states that 0.04 percent of the company’s capital must be paid as the Competition Authority share. Both the Ministry of Trade guide and Invest in Türkiye note that this payment can be handled through the Trade Registry Directorate rather than through a separate bank visit.
For joint stock companies, a second payment issue arises. Official guidance states that at least 25 percent of the shares committed in cash must be deposited into a bank account opened on behalf of the company before registration, and Invest in Türkiye likewise states that 25 percent of the subscribed share capital must be paid prior to registration while the remaining 75 percent must be paid within two years. The same official source adds that this pre-registration 25 percent rule does not apply to limited companies in the same way, because subscribed capital for limited companies may be paid within 24 months following establishment.
This is a crucial point in the MERSIS registration process because many founders assume MERSIS is only about digital filing. In reality, the MERSIS workflow is tied to real-world pre-registration payments that must be documented and then aligned with the registry application. (Invest in Türkiye)
Step 7: Apply to the Trade Registry Directorate for Registration
After the MERSIS contract, signatures, and required payments are completed, the founders apply to the relevant Trade Registry Directorate for final registration. The Ministry of Trade guide states that, upon application of the founders together with the relevant documents, the Trade Registry Directorate completes the registration process. Invest in Türkiye likewise identifies the Trade Registry Directorate as the one-stop shop for incorporation.
This stage is the legal bridge between MERSIS and company existence. MERSIS prepares and routes the data, but the Trade Registry Directorate completes registration. That is why it is more accurate to describe MERSIS as the mandatory digital incorporation framework rather than as the sole legal act of incorporation. (Invest in Türkiye)
Document Package for Joint Stock Companies
The required documents differ somewhat by company type. For a joint stock company, the Ministry of Trade guide lists the certified articles of association, proof of payment of the Competition Authority share, written statements of non-shareholder board members if any, signature declarations of persons authorized to represent and bind the company, and the document showing that at least 25 percent of the cash capital has been deposited in the bank. It also lists additional items for in-kind capital, court-appointed valuation reports, contracts concerning formation and takeover of non-cash assets, Ministry or official approvals where required, and documentation where a legal person sits on the board.
Invest in Türkiye provides a similar list and additionally mentions the petition requesting registration, incorporation notification form, founders’ declaration, chamber of commerce registration forms, and the bank certificate showing the paid-in minimum capital deposit. Taken together, these official sources show that the MERSIS file must be supported by a documentary package that is still highly formal, especially for joint stock companies. (Invest in Türkiye)
Document Package for Limited Liability Companies
For limited companies, the official Ministry guide lists the company agreement with approved founder signatures, written statements of non-partner board members accepting the duty, signature declarations of company directors, proof of Competition Authority payment, legal-person board-member determination documents if applicable, and the relevant in-kind capital documents where non-cash capital is being contributed.
Invest in Türkiye supplements this by listing the petition requesting registration, four copies of the incorporation notification form, signed articles of incorporation, payment made to the Competition Authority account, signature declarations, founders’ declaration, and chamber registration forms, plus in-kind capital materials where relevant. Although the MERSIS platform is the shared digital entry point, the document set still needs to match the legal profile of the specific company type being registered. (Invest in Türkiye)
Special Issues for Foreign Shareholders in the MERSIS Process
Foreign shareholders often experience the MERSIS process differently because additional documentary layers apply. Invest in Türkiye states that where the foreign partner is a real person, passport copies are required, and if that person resides in Türkiye, a notarized residence permit and tax identification number are also relevant. For foreign legal-entity shareholders, official guidance requires a certificate of activity showing the current status and signatories of the foreign entity, resolutions authorizing the establishment, and, where relevant, a power of attorney for the person following the application. (Invest in Türkiye)
Official guidance also states that documents issued and executed outside Türkiye must be notarized and apostilled or alternatively ratified by the Turkish consulate in the relevant country, and then officially translated and notarized by a Turkish notary. This is one of the main practical reasons why foreign-participation files slow down: the MERSIS entry itself may be digital, but the legal validity of the underlying documents still depends on proper cross-border legalization. (Invest in Türkiye)
In other words, MERSIS simplifies the registry side of company formation, but it does not eliminate classic private international law formalities around foreign corporate documents. A foreign founder still needs the legal paperwork to be valid before the digital workflow can succeed. (Invest in Türkiye)
What Happens After MERSIS-Based Registration?
Registration does not end the legal process. Invest in Türkiye states that, after completion of the registration phase, the Trade Registry Directorate notifies the relevant tax office and the Social Security Institution ex officio and arranges an announcement in the Commercial Registry Gazette within approximately ten days after registration. It also states that a tax registration certificate must be obtained from the local tax office and that a social security number for the company must be obtained from the Social Security Institution. (Invest in Türkiye)
Official guidance further states that the Trade Registry Directorate’s authorized personnel certify the company’s legal books during the establishment process, including the journal, ledger, inventory book, share ledger, manager’s meeting minutes book, and general assembly meeting minutes book. The Ministry of Trade guide similarly states that, following registration, the commercial books to be kept by joint stock and limited companies are approved by the Trade Registry Directorate and handed over to the relevant party. (Invest in Türkiye)
Invest in Türkiye also states that, on the day the company is registered, the signatories of the company issue a signature circular before authorized Trade Registry Directorate personnel. For companies and branches established in Türkiye by foreign investors, the same source adds that certain foreign direct investment documents are now submitted electronically through E-TUYS, including the Activity Information Form for FDI, the FDI Capital Data Form, and the FDI Share Transfer Data Form. (Invest in Türkiye)
Common Mistakes in the MERSIS Registration Process
A common mistake is treating MERSIS as if it were only a website form. Official sources show that it is the mandatory digital framework for trade registration transactions, but they also show that signature approval, capital payment, document legalization, and Trade Registry filing still matter. A founder who completes the MERSIS screens but neglects the parallel legal formalities does not yet have a registrable file. (Invest in Türkiye)
A second common mistake is underestimating the foreign-founder tax-number step. The Ministry guide expressly states that foreigners must first obtain a tax number and register it to MERSIS through the trade registry office. This means foreign participation issues should be handled before the file is treated as ready for final contract preparation and signature.
A third mistake is assuming the same signing route applies to every company. Official guidance distinguishes limited companies and cooperatives, where the signature-approval process is carried out at the Trade Registry Directorate where the headquarters is located, from other companies for which approval may also be sought before any notary public. That distinction can affect planning, especially where founders are using representatives or cross-city logistics.
A fourth mistake is forgetting that MERSIS does not eliminate the need for supporting evidence. For JSCs, official guidance still requires proof of payment of the Competition Authority share, bank proof for the 25 percent paid-in cash capital, and special documents for in-kind capital or regulated sectors. For LLCs, separate declarations and supporting corporate documents are also still required.
Why MERSIS Is Important for Lawyers and Investors
For lawyers, MERSIS matters because it forces corporate structuring issues to be addressed early. Company name clearance, object clause drafting, capital arrangement, foreign shareholder documentation, representation rules, and signing logistics all have to align inside the digital workflow before registration. Since the company contract is prepared inside MERSIS and in Turkish, legal review at the pre-filing stage becomes more, not less, important.
For investors, the main benefit is predictability. Official sources describe MERSIS as centralizing company-formation processes, generating potential tax information, transmitting contracts electronically, and supporting fast Trade Registry completion once the file is complete. That does not mean every company will be incorporated instantly, but it does mean the Turkish system is designed to make incorporation more structured and less fragmented than a purely paper-driven process. (Invest in Türkiye)
Conclusion
The MERSIS registration process in Turkish company formation law is the mandatory digital spine of modern company incorporation in Türkiye. Official guidance shows that MERSIS is where the incorporation file begins, where founders and authorized persons are entered, where the company contract is generated in Turkish, and where the company’s potential tax number is automatically assigned. But official sources also make equally clear that MERSIS does not replace legal formalities such as signature approval, Competition Authority payment, capital deposit where required, and final registration at the Trade Registry Directorate. (Invest in Türkiye)
For that reason, the right way to understand MERSIS is not as a mere online portal and not as a complete substitute for registry law. It is the legally required electronic framework through which Turkish company formation is organized, documented, and pushed toward registration. When the digital file, supporting documents, foreign-founder paperwork, and payment evidence all match, official sources indicate that registration can move very quickly. When they do not, MERSIS will expose the inconsistencies rather than cure them.
A well-managed MERSIS process therefore gives founders and investors a genuine advantage: faster formation, fewer documentary errors, and better alignment between the company contract, registry records, and post-registration compliance. In Turkish practice, that makes MERSIS not only a technical system, but one of the most important legal tools in company formation. (Invest in Türkiye)
FAQ
Is MERSIS mandatory for company formation in Türkiye?
Yes. Official Invest in Türkiye guidance states that trade registration transactions must be fulfilled through MERSIS pursuant to the Trade Registry Regulation. (Invest in Türkiye)
Does MERSIS itself create the company?
Not by itself. Official sources show that MERSIS is the required electronic platform, but the Trade Registry Directorate completes the registration process after the founders submit the relevant documents.
Can foreign shareholders be entered directly into MERSIS?
They can be entered with passport information, but official Ministry guidance states that foreigners must first obtain a tax number and register it to MERSIS through the trade registry office.
Is the company contract prepared in English?
No. Official Ministry guidance states that the company contract prepared through MERSIS is prepared in Turkish.
Do founders still need to go to a notary or Trade Registry office if MERSIS is digital?
Yes, in many cases. Official guidance states that founders or their authorized representatives must go to the relevant authority for signature verification, with the exact route depending on the company type.
What happens after registration is completed through the Trade Registry?
Official sources state that the Trade Registry notifies the tax office and Social Security Institution, legal books are certified during establishment, and a signature circular is issued on the day of registration. (Invest in Türkiye)
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