Affiliate Commission Tax Filing in Turkey: Self-Employed Status Guide

Four content creators based in Istanbul's Şişli district earned ₺48,000, ₺92,000, ₺186,000 and ₺340,000 from the thMenu affiliate program in 2027. They all asked the same question: "How do I file this?" The answer depends on which tax category the income falls under and the legal structure you build with an accountant. This article is not legal advice — it provides a framework with examples.

GVK Article 65: Self-Employment Income Defined

Turkey's Income Tax Law Article 65 states that "earnings derived from any self-employment activity constitute self-employment income." Affiliate commission — recurring income from referring services — falls under this category per Revenue Administration interpretation. It is not commercial income (Article 37), because no goods are traded; nor is it capital income, since no real estate or securities yield is involved.

Individuals with annual gross income of ₺75,000 or more must file an annual income tax return in March as of 2026. Brackets start at 15% and reach 40% above ₺880,000. Even if withholding tax was deducted, filing obligation remains; the difference is paid or refunded.

VAT and the Sole Proprietorship Decision

Affiliate services are classified as B2B and subject to 20% VAT. If monthly commission regularly reaches ₺10,000-15,000, accountants typically recommend forming a sole proprietorship (münferit teşebbüs). Clear benefits include:

• Expenses become deductible: office, internet, equipment, training, tax advisory.
• VAT recovery becomes possible on software subscriptions and ad spend.
• Bağ-Kur (social security) premiums are deductible and build pension rights.

Downsides: roughly ₺2,400 monthly fixed Bağ-Kur premium, accountant fees (₺2,000-4,000/month), bookkeeping burden. For creators with annual gross income under ₺200,000, sole proprietorship is usually favorable; above that, it is virtually mandatory.

Four Istanbul Cases Compared

Case 1 (Ayşe, ₺48K): below threshold, only annual return. Net tax ~₺7,200. Sole proprietorship unnecessary. Case 2 (Mert, ₺92K): individual filing, ~₺16,500 tax. On the edge; accountant input critical. Case 3 (Selin, ₺186K): formed sole proprietorship; after deducting expenses, effective tax burden dropped to 18%. Case 4 (Burak, ₺340K): sole proprietorship mandatory; uses accounting automation (Logo, Paraşüt) and pays quarterly provisional tax.

Choice of accountant is critical. Look for someone with digital economy experience — familiar with affiliate income, freelance platforms, and foreign currency receipts. USD/EUR commission landing via Stripe or Wise is converted using the Central Bank effective sale rate on receipt date.

FAQ

Commission arrived in USD/EUR — which rate do I use? The Turkish Central Bank effective sale rate on the receipt date. Your bank usually converts automatically and shows this on the deposit statement.

If withholding was deducted, do I still need to file? Yes, if gross income exceeds the ₺75K threshold, filing is mandatory. Withholding gets offset against the calculated tax.

Is there an alternative to sole proprietorship? Limited liability company is possible but costly at lower income levels. Generally makes sense above ₺500K annual revenue.

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