What are the Korean income tax rates?

Eight progressive brackets from 6% (taxable income up to 14 million won) to 45% (over 1 billion won). Tax equals taxable income times the rate minus the progressive deduction, plus local income tax of 10% of that tax.

Who files comprehensive income tax in May?

People with business or freelance income, or other income that year-end settlement does not cover, file in May of the following year (June for taxpayers under the faithful-reporting audit). Filing late can add penalties.

What is not included in this calculator?

The standard expense-rate method, penalties, financial income taxation, rental income, losses, detailed special deductions such as cards and medical expenses, and tax reductions are not modeled. You can enter deduction totals yourself; file on Hometax for an accurate return.

Tax & Refund

Korean Income Tax Calculator

Estimate Korean comprehensive income tax and local income tax on combined salary and business income

Estimate your income tax

Korean tax law, tax years 2025-2026 rate table, salary + business income combined

Income

Gross salary (employment income)(optional)

Annual pay excluding non-taxable items. Leave blank if you have no salary.

Business revenue(optional)

Annual gross receipts for freelancers and sole proprietors. Leave blank if none.

Income deductions

Spouse and dependents for the basic deduction

You are included automatically, so enter the number excluding yourself. Check the income and age requirements yourself.

People aged 70 or over

Count among the basic-deduction people, including yourself.

People with disabilities

Count among the basic-deduction people, including yourself.

Single-parent deduction applies

Takes priority over the female-householder deduction; the two do not stack.

Female-householder deduction applies

Only applies when total income is 30 million won or less.

National Pension and similar contributions paid(optional)

The full annual amount is deductible.

Other income deductions (total)(optional)

Enter the total you calculated separately, such as card spending or Yellow Umbrella deductions.

Tax credits

Children eligible for the child tax credit

Check the age requirement yourself. Cannot exceed the number of dependents.

Child born or adopted this year(optional)

Select the child's order if a child was born or adopted in the tax year.

Apply the standard tax credit

Untick if you claimed special deductions or credits (or monthly rent) in year-end settlement, then enter your total credits below.

Tax already paid

Income tax already paid(optional)

Withholding (the income tax part of 3.3%, for example) and interim prepayments.

Local income tax already paid(optional)

If blank, 10% of income tax already paid is used (rounded down to 10 won).

What this calculator does not cover

The standard expense-rate method and industry expense-rate lookups
Bookkeeping credit and penalties for non-filing, late filing or late payment
Interest and dividends (financial income taxation), pension and other income
Real estate rental income
Business losses and carried-forward losses
Detailed special deductions and credits (cards, medical, education, donations, rent); enter only the totals
Tax reductions under special tax law (e.g. start-up SME relief) and the overall deduction cap
Installment payment, special rural development tax, foreign tax credit, disaster loss

Simulate and file on Hometax