Scope of authority
GIB, attached to the Ministry of Treasury and Finance, is the central authority managing income and wealth taxes (income tax, corporate tax, VAT, excise) in Turkey.
Its duties include receiving tax declarations, collecting taxes, auditing, and developing the electronic tax infrastructure (e-Beyanname, e-Fatura, e-Defter systems).
Most important systems for businesses
Interactive Tax Office — Filing declarations, debt inquiries.
e-Fatura system — Electronic invoice between companies with a tax stamp.
e-Arşiv portal — Issuance to those without a tax stamp.
e-Defter platform — Monthly berat submissions.
Defter-Beyan system — For small tradespeople and sole proprietorships.
SMB compliance
GIB compliance is mandatory for everyone doing business in Turkey. Automating these processes with software both reduces errors and saves time. Our detailed guide: e-Defter requirement.