Korea Income Tax Rate Calculator (6-45% Brackets)
Already know your taxable base? One number gives you the bracket, the progressive deduction, computed tax, and your effective rate
If you already know your taxable base, this is the shortest path to the number. Enter that one amount and the calculator locates your bracket among Korea's 6-45% progressive rates, applies the matching progressive deduction (누진공제), and returns the computed tax with your marginal and effective rates side by side — the effective rate being the one that tells you what you're really paying. A single checkbox adds or removes the 10% local income tax surcharge. If you still need to add up income by type and work through deductions first, use the Korea Comprehensive Income Tax Estimator.
🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Enter your total taxable income base (KRW).
- Use the checkbox to choose whether to include the 10% local income tax.
- The computed tax is calculated automatically at the applicable bracket rate.
- Review the computed tax, marginal rate, effective rate, and total tax burden, then copy the result.
FAQ
- How do I find my taxable base?
- The taxable base is your total income minus your various income deductions. This calculator takes the taxable base as input and computes only the resulting tax.
- What's the difference between the marginal and effective rate?
- The marginal rate is the rate of the bracket your taxable base falls into, while the effective rate is your computed tax divided by your taxable base, the actual average burden. Because of the progressive deduction, the effective rate is lower than the marginal rate.
- Will this match my actual tax bill?
- This is a reference approximation. It is based on the computed tax before tax credits (for employment, children, pension, and so on), reductions, and penalties, so it may differ from the actual amount. Confirm your final tax with the tax office.