How does the upcoming obligation alert work?

The tool highlights filings whose deadlines are approaching so they stand out. This helps you avoid missing time-sensitive declarations such as VAT or withholding tax.

Can I filter the calendar to show only the taxes I care about?

Yes, the filters let you display only the declaration types you track, for example just VAT and SSI. This declutters the calendar around your own obligations.

Why do VAT and advance tax deadlines differ?

VAT is generally filed on monthly periods, while advance (provisional) tax follows quarterly periods. The tool lists each obligation according to its own filing cycle.

Should I track withholding and SSI declarations separately?

Although withholding and the Premium Service Declaration are filed jointly for many taxpayers, the tool shows the relevant dates as distinct items. Filter them based on your own taxpayer status.

What happens if a listed date falls on a weekend or public holiday?

Under Turkish rules, when a deadline lands on a holiday it extends to the next business day. Use the tool's dates for planning and confirm critical days against the official Revenue Administration calendar.

Are the dates in this calendar official and binding?

The dates are for informational and planning purposes; the official, binding source is the Turkish Revenue Administration. For your exact obligations, consult your accountant and current legislation.

Is the tool free and does it require registration?

The Tax Calendar 2025 is free to use on kolaydonustur.com. You can view and filter the dates without creating an account.

Tax calendar 2025 — Free Online

⚠️

This tool only performs calculations and is NOT investment or financial advice. Rates/taxes change; verify with official sources (bank, accountant, SPK-licensed advisor) before acting.

KDV

VAT Return (December)

December period VAT return and payment

24 Ocak

Passed

Muhtasar

Withholding Return (December)

December period withholding return and payment

24 Ocak

Passed

SGK

SSI Monthly Premium (December)

December premium declaration deadline

31 Ocak

Passed

KDV

VAT Return (January)

January period VAT return

24 Şubat

Passed

Muhtasar

Withholding Return (January)

January period withholding return

24 Şubat

Passed

SGK

SSI Monthly Premium (January)

January premium declaration

28 Şubat

Passed

Annual Income Tax Return

2024 annual income tax return deadline

17 Mart

Passed

KDV

VAT Return (February)

February period VAT return

24 Mart

Passed

SGK

SSI Monthly Premium (February)

February premium declaration

31 Mart

Passed

KDV

VAT Return (March)

March period VAT return

25 Nisan

Passed

Corporate Tax Return

2024 fiscal year corporate tax return deadline

25 Nisan

Passed

SGK

SSI Monthly Premium (March)

March premium declaration

30 Nisan

Passed

KDV

VAT Return (April)

April period VAT return

26 Mayıs

Passed

Geçici

Advance Tax Return (Q1)

January-March advance tax return

26 Mayıs

Passed

SGK

SSI Monthly Premium (April)

April premium declaration

30 Mayıs

Passed

KDV

VAT Return (May)

May period VAT return

24 Haziran

Passed

SGK

SSI Monthly Premium (May)

May premium declaration

30 Haziran

Passed

KDV

VAT Return (June)

June period VAT return

24 Temmuz

Passed

SGK

SSI Monthly Premium (June)

June premium declaration

31 Temmuz

Passed

KDV

VAT Return (July)

July period VAT return

25 Ağustos

Passed

Geçici

Advance Tax Return (Q2)

April-June advance tax return

25 Ağustos

Passed

SGK

SSI Monthly Premium (July)

July premium declaration

29 Ağustos

Passed

KDV

VAT Return (August)

August period VAT return

24 Eylül

Passed

SGK

SSI Monthly Premium (August)

August premium declaration

30 Eylül

Passed

KDV

VAT Return (September)

September period VAT return

24 Ekim

Passed

SGK

SSI Monthly Premium (September)

September premium declaration

31 Ekim

Passed

Geçici

Advance Tax Return (Q3)

July-September advance tax return

17 Kasım

Passed

KDV

VAT Return (October)

October period VAT return

24 Kasım

Passed

SGK

SSI Monthly Premium (October)

October premium declaration

28 Kasım

Passed

KDV

VAT Return (November)

November period VAT return

24 Aralık

Passed

SGK

SSI Monthly Premium (November)

November premium declaration

31 Aralık

Passed

* Dates falling on official holidays/weekends may shift to the next business day.

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📖 How to Use

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🧾 Bu vergi hesaplama aracı tahmini değer üretir, kesin vergi miktarı için Gelir İdaresi Başkanlığı (GİB), bağımsız mali müşaviriniz veya vergi dairesi onayı alın. Vergi oranları yıllık değişir.

Frequently asked questions

The tool includes deadlines for VAT, withholding tax, advance (provisional) tax, corporate tax and SSI declarations. It brings these five core obligations together in a single calendar.