Once your company is registered, these are the recurring filing deadlines to plan around. Exact dates shift slightly year to year around weekends and public holidays — treat this as a planning guide, and confirm exact dates with our office.
| Filing | Frequency | Typically Due | What It Covers |
|---|---|---|---|
| VAT Return (KDV) | Monthly | Around the 26th–28th | Value-added tax on commercial, industrial, agricultural and professional activity, including imports. |
| Withholding & SSI Return (Muhtasar) | Monthly | Around the 26th–28th | Payroll withholding tax and social security premium declarations. |
| SGK Premium Payment | Monthly | End of month | Employer and employee social security contributions once you have staff on payroll. |
| Stamp Tax Return | Monthly | Around the 26th–28th | Tax on qualifying contracts, agreements and official documents. |
| Provisional Corporate Tax (Geçici Vergi) | Quarterly | 17th of the 2nd month after quarter-end | Advance corporate tax on each quarter's profit, credited against the annual return. |
| Annual Corporate Tax Return | Annual | April 30 | Final corporate tax reconciliation for the prior fiscal year — your first one is due the April after incorporation. |