Income Tax Estimator
Free income tax estimator for the US (2024 federal brackets) and Turkey (2024 GVK brackets). Enter your gross income and filing status to see estimated tax, effective rate, and bracket breakdown.
Estimate your federal income tax for the US (2024) or Turkey.
This calculator estimates your federal income tax for two countries: the United States (2024 IRS brackets) and Turkey (2024 Gelir Vergisi Kanunu brackets). It is designed for quick estimates — not as a replacement for professional tax preparation.
How Income Tax Works
Both the US and Turkey use progressive (marginal) tax systems. This means different portions of your income are taxed at different rates — you do not pay the top rate on all your income.
For example, a US single filer earning 100,000. Instead:
- The first $11,600 is taxed at 10%
- Income from 47,150 is taxed at 12%
- Income from 85,400 (taxable income after standard deduction) is taxed at 22%
This results in a much lower effective tax rate than the top marginal rate.
United States — 2024 Federal Tax Brackets
The IRS adjusts tax brackets annually for inflation. For 2024:
| Taxable Income (Single) | Rate |
|---|---|
| 11,600 | 10% |
| 47,150 | 12% |
| 100,525 | 22% |
| 191,950 | 24% |
| 243,725 | 32% |
| 609,350 | 35% |
| Over $609,350 | 37% |
Standard deductions for 2024:
- Single: $14,600
- Married filing jointly: $29,200
- Head of household: $21,900
The standard deduction is automatically subtracted from gross income before applying tax brackets. If you have significant mortgage interest, charitable contributions, or state taxes, you may itemize instead.
Married filing jointly brackets are exactly double the single thresholds, reflecting the “marriage bonus” built into US tax law.
Turkey — 2024 GVK Tax Brackets
Under the Gelir Vergisi Kanunu (Income Tax Law), Turkey’s 2024 brackets for employment income (ücret geliri) are:
| Taxable Income (TL) | Rate |
|---|---|
| 0 – 110,000 | 15% |
| 110,001 – 230,000 | 20% |
| 230,001 – 870,000 | 27% |
| 870,001 – 3,000,000 | 35% |
| Over 3,000,000 | 40% |
Note: Turkey does not have a standard deduction equivalent to the US system. Deductions under Turkish law include specific allowable expenses per GVK Articles 31 and 89.
How to Use This Calculator
- Country — select US or Turkey.
- Gross Income — enter your annual gross income. For the US, this is your W-2 or 1099 income before deductions. For Turkey, this is your annual employment income (yıllık ücret geliri).
- Filing Status (US only) — choose single, married filing jointly, or head of household.
- Additional Deductions — for the US, enter itemized deductions beyond the standard deduction. For Turkey, enter deductible expenses per GVK.
Understanding Your Results
- Estimated Tax — your total federal income tax liability.
- Effective Tax Rate — your actual tax burden as a percentage of gross income. Always lower than your marginal (top bracket) rate.
- Taxable Income — gross income minus applicable deductions.
- After-Tax Income — what remains after federal tax.
- Bracket Breakdown — shows how much tax applies at each rate level.
Important Limitations
This calculator covers federal income tax only. It does not include:
- US: FICA taxes (Social Security 6.2% and Medicare 1.45%), state income taxes, Alternative Minimum Tax (AMT), tax credits (child tax credit, EITC, etc.)
- Turkey: SGK (Social Security) premiums (employee contribution: 14%), işsizlik sigortası (unemployment insurance: 1%), damga vergisi (stamp duty: 0.759%)
For accurate tax filing, consult a CPA (US) or mali müşavir (Turkey).
Worked Examples
Example 1 — US single, $50,000 gross:
- Standard deduction: 35,400
- 10% on 1,160
- 12% on 2,856
- Total: $4,016 (effective rate: 8.0%)
Example 2 — Turkey, 500,000 TL gross:
- 15% on 110,000 = 16,500
- 20% on 120,000 = 24,000
- 27% on 270,000 = 72,900
- Total: 113,400 TL (effective rate: 22.7%)
Frequently Asked Questions
Does this account for the earned income tax credit? No. Tax credits such as EITC can significantly reduce your actual liability. This calculator estimates tax before credits.
What is the difference between marginal and effective tax rates? Your marginal rate is the rate on your last dollar of income. Your effective rate is your total tax divided by total income. For most people, effective rate is 10–15 percentage points lower than marginal rate.
Should I take the standard deduction or itemize? If your total itemized deductions (mortgage interest + state taxes capped at $10,000 + charitable contributions + other qualified expenses) exceed the standard deduction, itemize. Most taxpayers benefit from the standard deduction.