Which year's income tax brackets does it use?

It applies Turkey's 2025 income tax brackets: 15% up to 158,000 TRY, 20% up to 330,000, 27% up to 800,000, 35% up to 4,300,000, and 40% above that. Tax is computed bracket by bracket, not as a single flat rate.

Why is my R&D spending deducted at 2× in the R&D mode?

Under Turkey's Law No. 5746, R&D expenditures can be deducted from the taxable base at twice their value, and the tool follows this rule. So entering 100,000 TRY of R&D reduces the taxable base by 200,000 TRY.

What does the 'incentive rate' mean in Investment Incentive mode?

It is the percentage of your investment that gets deducted from the taxable base. For example, 200,000 TRY investment × 50% incentive = a 100,000 TRY reduction in your taxable base.

What is the 'effective rate' in the results, and how is it different from the bracket rate?

The effective rate is total tax paid divided by the taxable base, i.e. your average rate. Because of progressive brackets it is always lower than your top bracket rate and better reflects your real tax burden.

How is the taxable base determined and which inputs do I enter?

The base is your Annual Gross Income minus Current Expenses, after which the deduction for your selected mode is applied. Enter amounts in TRY; you can use either a comma or a dot for decimals.

Does this tool also calculate corporate tax?

No, it calculates income tax savings. Corporate tax is 25% and is computed separately, so if you operate as a company, interpret the results with that difference in mind.

Can I rely on these figures for tax planning?

The results are estimates for informational purposes and do not include exemptions, offset conditions, or every current regulation. For exact figures and official decisions, consult a certified accountant and rely on the applicable legislation.

Tax benefit calculator — 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.

Current Situation

Annual Gross Income (₺)

Current Expenses (₺)

Additional Expense (₺)

Expense Type

₺50.000 additional expense deduction

— Before —

Taxable Base₺400.000

Tax₺77.000

Effective Rate%19,3

— After —

Taxable Base₺350.000

Tax₺63.500

Effective Rate%18,1

Tax Savings₺13.500

Remaining Tax

Savings

2025 income tax brackets: 15/20/27/35/40%. Corporate tax 25% calculated separately. Consult your tax advisor.

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📖 How to Use

Enter values

Fill required numbers in the form.

Pick parameters

Currency / date / rate / bracket.

Compute

Result appears instantly.

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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

It offers three modes: Expense Deduction (extra personnel, rent, depreciation), Investment Incentive (an incentive rate applied to your investment), and R&D / Innovation spending. Each mode shows how your taxable base drops and the resulting tax savings separately.

Tax Benefit Calculator

📖 How to Use

Frequently asked questions