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Tax & Tax Saving
Combine employment, business, pension and other income to estimate your tax base, tax bracket, and the extra tax or refund in May.
Total income amount (after deducting necessary expenses and employment income deduction)
The 'employment income amount' on your withholding receipt (gross salary − employment income deduction)
Revenue − necessary expenses (freelance, side jobs, etc.)
Only amounts subject to comprehensive taxation
Simplified method that adds only the portion above KRW 20 million
Deductions and tax already paid
KRW 1.5 million per person
National Pension premiums, Noranumbrella (small business mutual aid), etc.
Employment income, child and pension account tax credits, etc.
Year-end tax settlement, withholding (3% of the 3.3%), interim prepayment
Enter your values and press Calculate
Additional tax due in May (including local income tax, estimate)
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Tax base
Top applicable tax rate (marginal rate)
Effective tax rate
May comprehensive income tax
Comprehensive income tax is a progressive tax that combines several incomes, subtracts deductions, and applies a different rate to each bracket. Even the same KRW 1 million is taxed differently depending on which bracket it is added to.
Enter your employment, business, pension and other income amounts. These are revenue minus necessary expenses or the employment income deduction.
Enter the number of basic deduction persons, other income deductions and the total tax credits.
Enter the tax you have already paid and it estimates whether you will owe more in May or get a refund.
Foreign residents are taxed on Korean income at the same 6–45% progressive rates (plus 10% local income tax) shown above.
Foreign employees may instead elect a 19% flat rate on employment income for up to 20 years from the first day of work in Korea (work must start by 31 December 2026). The flat rate removes all deductions and credits. A proposal to raise it to 21% from 2027 is pending.
Compare both: run this calculator with your total pay, then compare the result with 19% × total pay × 1.1 (local tax included).
Rules as of November 2026. Check with your employer, the National Tax Service or NPS for your own case.
It is shown as 'earned income amount' on the earned income withholding receipt you get from your employer. It equals total salary minus the earned income deduction.
Of the 3.3%, 3% is income tax and 0.3% is local income tax. If you paid more than your actual determined tax, you get a refund by filing in May. For taxes already paid, enter only the income tax portion (3%).
The marginal tax rate is the rate applied to each additional bit of income. The effective tax rate is the tax actually paid as a share of your total tax base, so it is lower than the marginal rate.
If interest and dividends are KRW 20 million or less per year, tax is settled by withholding and the income is not added to your comprehensive income. If you have other comprehensive income, that income must still be reported.
This calculator is a rough estimate that reflects only the main items. The actual tax may differ depending on detailed rules such as deduction limits, reductions, alternative taxation, and penalty taxes.
Results are estimates based on your inputs and simplified assumptions, and are for reference only, not a basis for investment decisions.
Last updated: November 2, 2026
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