How is South Korean income tax calculated?

Korea uses progressive national income tax brackets. The first ₩14,000,000 is taxed at 6%, then income above is taxed at 15%, 24%, 35%, 38%, 40%, 42% and 45% in rising bands. A separate local income tax of 10% of the national tax also applies.

What is the local income tax in Korea?

On top of national income tax, a local income tax equal to 10% of your national income tax is paid to your city or province. For example, ₩8,640,000 of national tax adds ₩864,000 of local tax. This calculator shows the national tax; add 10% for the local portion.

Does this include the National Pension?

Yes. The National Pension (국민연금) is withheld at 4.5% of your standard-income base up to a monthly ceiling (₩6,170,000 in 2024, ₩6,370,000 from July 2025). The calculator applies 4.5% capped at the annual ceiling and subtracts it in your take-home figure.

What is the difference between effective and marginal tax rate?

Your effective rate is total tax divided by income (your average). Your marginal rate is the rate on your next won. On ₩60,000,000 in 2024 the marginal rate is 24% but the effective national tax rate is about 14.4% because lower bands use lower rates.

Have the Korean tax brackets changed recently?

The current bracket schedule took effect on 1 January 2023, when the bottom band rose from ₩12,000,000 to ₩14,000,000 and the second from ₩46,000,000 to ₩50,000,000. The brackets are unchanged for 2023, 2024 and 2025.

Can I use this for previous years?

Yes. Use the year selector to view 2023, 2024, 2025 or 2026 — 2026 is the latest year. The national brackets are identical across these years; only the National Pension contribution ceiling differs, as it is adjusted each July (2026 carries forward the latest ceiling pending the July 2026 update).

What is not included?

This tool does not model the earned-income deduction, personal and dependant deductions, tax credits, the local income tax in take-home, or National Health, Long-term Care and Employment Insurance. Consult the NTS (Hometax) or a tax accountant for exact figures.

South Korea Income Tax Calculator

Enter your annual income to estimate your national income tax, National Pension and take-home pay. Uses the NTS progressive brackets for multiple years.

Updated June 2026

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Tax Calculator

South Korea — 2026 Tax Year

2026 Tax Year

Tax Year

Select the tax year to view applicable rules and rates

This is an estimate. Consult a tax professional for accurate calculations.

Annual Gross Income (₩ KRW)

Filing Status

Enter your income to calculate

Fill in your gross income and filing status, then calculate to see your tax breakdown.

How to use South Korea Income Tax Calculator

This South Korea income tax calculator estimates your national income tax and National Pension based on your annual income and the tax year you select (2023, 2024, 2025 or 2026). Korea uses a progressive schedule running from 6% up to 45%, and the brackets have been unchanged since the 1 January 2023 reform — so all four years share the same rates. The calculator shows your effective rate, marginal rate and a band-by-band breakdown plus estimated take-home. Note: a separate local income tax equal to 10% of your national tax also applies and is explained below.

Select your tax year (2023, 2024, 2025, or 2026) from the dropdown.
Enter your annual gross income in Korean won (₩).
Keep the filing status as Individual — Korea taxes individuals on the progressive schedule.
Click Calculate to see your national income tax, National Pension, effective rate and marginal rate.
Review the band-by-band breakdown, then add 10% of the national tax for the local income tax.

Your data never leaves your device — 100% private processing.

How South Korean tax brackets work

Korea uses a progressive national income tax: each bracket applies only to the income within its range, not your whole income. On ₩60,000,000 in 2024 you pay 6% on the first ₩14,000,000 (₩840,000), 15% on the next ₩36,000,000 (₩5,400,000), and 24% on the remaining ₩10,000,000 (₩2,400,000), totalling ₩8,640,000 in national income tax — an effective rate of about 14.4%, well below the 24% marginal rate. The bottom band is taxed at 6% from the first won; tax-free treatment in Korea comes from earned-income and personal deductions, which this estimator does not model.

National income tax brackets (unchanged 2023–2025)
Annual Taxable Income	Tax Rate	Progressive Deduction
₩0 – ₩14,000,000	6%	—
₩14,000,000 – ₩50,000,000	15%	₩1,260,000
₩50,000,000 – ₩88,000,000	24%	₩5,760,000
₩88,000,000 – ₩150,000,000	35%	₩15,440,000
₩150,000,000 – ₩300,000,000	38%	₩19,940,000
₩300,000,000 – ₩500,000,000	40%	₩25,940,000
₩500,000,000 – ₩1,000,000,000	42%	₩35,940,000
Over ₩1,000,000,000	45%	₩65,940,000

The local income tax (an extra 10%)

On top of national income tax, Korea levies a local income tax equal to 10% of your national income tax, paid to your city or province. So if your national tax is ₩8,640,000, the local income tax is ₩864,000, for a combined ₩9,504,000. Because the local tax is a percentage of the computed tax rather than of income, this calculator reports the national figure and you simply add 10% to get the all-in amount. The local income tax is not included in the take-home figure shown.

National Pension and other social insurance

Employees in Korea pay four social insurances: National Pension, National Health Insurance, Long-term Care, and Employment Insurance. This calculator models the National Pension at 4.5% of your standard-income base, capped at the monthly ceiling (₩6,170,000 in 2024, ₩6,370,000 from July 2025). On ₩60,000,000 that is ₩2,700,000; income above the ceiling adds no further pension. The pension is shown separately and subtracted in your take-home figure; the other three insurances are not modelled.

Effective versus marginal tax rate

Your effective tax rate is total national tax divided by total income — your true average. Your marginal rate is the rate on your next won, set by the highest band you reach. On ₩60,000,000 in 2024 your marginal rate is 24%, but because the lower bands use smaller rates your effective national tax rate is about 14.4%. Knowing the difference helps with decisions about overtime, bonuses and year-end settlement (연말정산).

Worked examples

Individual, ₩30,000,000 income, 2024

Inputs: ₩30,000,000 income

Result: ~₩3,240,000 national tax · 10.8% effective · 15% marginal (+₩324,000 local)

Individual, ₩60,000,000 income, 2024

Inputs: ₩60,000,000 income

Result: ~₩8,640,000 national tax · ₩2,700,000 pension · 14.4% effective · 24% marginal

Individual, ₩100,000,000 income, 2024

Inputs: ₩100,000,000 income

Result: ~₩19,560,000 national tax · 19.6% effective · 35% marginal (+₩1,956,000 local)

Glossary

National income tax: The progressive personal income tax paid to the National Tax Service (NTS), from 6% to 45%.
Local income tax: A surtax equal to 10% of your national income tax, paid to your city or province.
Progressive deduction: A fixed amount subtracted from (income × top rate) to give the tax — a shortcut for the bracket method.
National Pension: The 국민연금 social-security contribution, 4.5% of the standard-income base up to a monthly ceiling.
Effective tax rate: Total national tax owed divided by total income — your true average tax rate.
Marginal tax rate: The rate applied to your next won of income, set by the highest band you reach.
NTS: The National Tax Service — Korea’s authority for national income tax, accessed via Hometax.
Year-end settlement: 연말정산 — the annual reconciliation where employees claim deductions and credits against withheld tax.

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