Korea Comprehensive Income Tax Estimator (Salary + Business + Rental)
Enter salary, business, rental, and pension income with your deductions, and it builds the taxable base for you before computing tax payable
Enter gross salary, business income, rental income, and pension or other income separately, and the estimator applies Korea's standard employment income deduction formula along with personal, national pension, and other income deductions to build your taxable base — the step you'd otherwise have to work out by hand. It's aimed at freelancers, employees running a side business, and landlords: anyone whose income arrives from several directions and who wants a sense of the bill before Korea's May filing season (종합소득세 신고). The full income and deduction breakdown copies out as text, and nothing you enter leaves your browser.
🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Enter your gross salary (employment income) along with your business income, rental income, and other or pension income amounts.
- Enter your number of dependents, National Pension contributions, and any other income deductions such as health insurance premiums or credit card spending deductions.
- Your total income, taxable base, applicable tax bracket, national income tax, local income tax, and total estimated tax due all appear automatically.
- Use the Copy Details button to copy the full breakdown as text so you can save or share it.
FAQ
- Will the amount this calculator shows match what I actually file?
- No. It's a simplified model built on the standard progressive rates (6-45%) and the standard employment income deduction formula used from tax year 2023 onward. Tax credits, exemptions, and detailed year-end settlement items aren't included, so your final assessed tax may differ.
- What should I enter for business income?
- Enter your net income after deducting necessary expenses from revenue, not your gross sales or total receipts.
- Is the income information I enter stored anywhere?
- No. Everything is calculated in your own browser, and nothing is transmitted to or saved on a server.