Gökay Gül SMMM — Turkish CPA in Istanbul for technopark, foreign investment & investment incentives

INSIGHT ·SME ·OCT 2026

POS Total Does Not Match the VAT Return: 4 Steps to Reconcile Line 45 (2026)

What should you do if the POS Transaction Information screen launched by the Turkish Revenue Administration on 11.08.2026 does not match line 45 of VAT Return No. 1? This four-step guide helps you reconcile the difference in your books and prepare for the 30-day explanation period under TPC (VUK) Art. 370 if the tax administration invites you to explain.

Gökay Gül · 15 min read

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20+ years on the ground
2 languages · served directly
5 sector focus (QSC · gaming · e-com · manufacturing · fintech)
15+ institutions coordinated (tax · SSI · trade registry…)

Gökay Gül provides his services under the Sistem Global Danışmanlık umbrella.

Gökay GÜL — Mali Müşavir · SMMM
Gökay GÜL SMMM

About

Behind every number, a story; behind every story, a decision.

20+ years in tax advisory, bilingual operations and locally-rooted, globally-minded intuition.

I have practiced as a CPA in Istanbul since 2006. My career began not with an ordinary ledger, but as the first financial advisor to a company that has since become Türkiye's unicorn. Reading the numbers of a young firm, I came to see that figures speak of a company's character, its intent, its future. That intuition has stood at the centre of my work for twenty years.

I provide my services under the Sistem Global Danışmanlık umbrella. I establish and sustain the Turkish operations of foreign investors. I work in Turkish and collaborate with my team on English-language engagements. The two words my clients say most often are trust and continuity. My promise is simple: a written response within one business day.

Title
Mali Müşavir · SMMM (TÜRMOB-licensed CPA)
Memberships
TÜRMOB · İSMMMO
Experience
20+ years
Education
Master of Arts · Accounting and Auditing (Non-Thesis Option) · Işık University (2015)
Languages
Turkish · English
Office
4. Levent · Sarıyer / İstanbul

Sample case scenarios.

Illustrative scenarios of structures we often work on. Names and details are representative; every file is assessed on its own facts.

Game Studio — From first email to first profit

Sample Scenario · May 2026

Foreign Game Studio Turkey Setup

A representative scenario covering decisions that may arise when a foreign mobile game studio establishes operations in Turkey — each file is assessed on its own facts.

Sample scenarioPDFForeign Investor
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About the process.

The questions that come up most about how I work, the process and pricing. If you can't find the answer, I'm a message away.

What kinds of companies and individuals do you serve?

I work with Turkish SMEs, sole proprietors, family businesses, e-commerce ventures, foreign-capital companies and self-employed professionals. I also work with new and small businesses; the scope of service depends on their needs.

How does an engagement begin? What is the typical onboarding?

We start with a complimentary 30-minute intro call to clarify your needs and design the right solution. Once the agreement is signed, the first two weeks cover ledger handover, e-invoice integration and setting the monthly rhythm.

What does bilingual operation mean?

I deliver my services in Turkish; in English I work together with my team. With foreign-capital clients, communication runs directly in the relevant language, without translators. This matters especially for European and international investors.

How long does company formation take in Turkey for foreign investors?

A complete Trade Registry file may be processed quickly; end-to-end timing depends on foreign-document authentication, tax-number steps, appointments and the bank's KYC review. Bank-account opening is separate from registration and is not guaranteed within the registry timeline.

How is monthly reporting done?

At month-end I deliver a standardized P&L, income statement and cash-flow summary. For SME clients, I hold a 30-minute monthly review — to read last month's numbers and plan the next.

How is pricing structured?

I work on a fixed monthly fee; the amount depends on transaction volume, headcount and scope of services. After the intro call I define the scope and provide a written quote — no surprise items later.