South Korea tax residency: the 183-day rule
South Korea treats you as a tax resident at 183 days in the calendar year (1 January – 31 December) — but the day count is only the part we can calculate. It is one of South Korea's tests, not the whole rule (see the others below). Source: National Tax Service (국세청), last reviewed 2026-05-27.
183 days isn't the only route — South Korea can also treat you as resident on non-day grounds (domicile in korea, occupation usually requiring 183+ days residence, cohabiting family + occupation/property status, substantial assets / property in korea, centre of general living relationship (vital interests), deemed-resident dispatched executives/employees and public officials, crew-member usual-residence rule). See every test below.
Spend 183 days or more in South Korea during the calendar year (1 January – 31 December) and it will generally treat you as a tax resident for that period.
Reviewed by Quentin Dupard, founder · last reviewed 2026-05-27 · How we research
- Threshold
- 183 days
- Counting window
- Calendar year
- Day-based test
- 1
- Last reviewed
- 2026-05-27
How does South Korea count days for tax residency?
According to National Tax Service (국세청), you become a tax resident of South Korea once you spend 183 days or more there in the calendar year (1 January – 31 December). Because the count is per calendar year, it resets every 1 January and days from a previous year do not carry over — though a single stay that spans New Year is split across two years’ totals.
183-day residency (calendar year)
183 days · the calendar year (1 January – 31 December)Spend 183 days or more in South Korea during the calendar year (1 January – 31 December) and it will generally treat you as a tax resident for that period.
Tax resident if domiciled in Korea or present for 183+ days in a calendar year. From tax years on/after 1 Jan 2026, presence for consecutive 183 days spanning two tax years also triggers residency.
What else makes you a tax resident of South Korea?
The day count is only one route. South Korea can also make you a tax resident through any one of the following — regardless of how few days you spend there. These don't depend on a day count, so Yuravia can't track them for you; weigh them against your own situation.
Domicile in Korea
Having a domicile in Korea makes you a resident regardless of days; domicile is determined by objective facts of living relationship — notably whether family lives together in Korea and whether property is located in Korea (Income Tax Act Art. 1-2(1)(i); Enforcement Decree Art. 2(1)). This is the primary, facts-and-circumstances route and does not depend on any day count.
Occupation usually requiring 183+ days residence
A person whose occupation would ordinarily require them to reside continually in Korea for at least 183 days is deemed to have a domicile in Korea, even before actually accumulating those days (Enforcement Decree Art. 2(3)1).
Cohabiting family + occupation/property status
A person who has family members making a living together with them in Korea and who, in view of their occupation or property status, is deemed to reside continually in Korea for at least 183 days is deemed domiciled (Enforcement Decree Art. 2(3)2) — a family/centre-of-vital-interests trigger independent of an actual day count.
Substantial assets / property in Korea
Retaining substantial assets (property) in Korea is treated as evidence of a Korean living relationship and can cause a person to be deemed resident on a facts-and-circumstances basis, even while physically abroad (Enforcement Decree Art. 2(1) and (3)).
Centre of general living relationship (vital interests)
Even a person who works overseas and spends more than 183 days abroad in a tax year remains a Korean resident if their general living relationship — family and property — is centred in Korea; conversely, a foreign national or permanent-residency holder living/working abroad with no cohabiting family in Korea and no occupation/property tie is deemed to have no Korean domicile (Enforcement Decree Art. 2(4)).
Deemed-resident dispatched executives/employees and public officials
Executives or employees dispatched to an overseas place of business or to an overseas local corporation of a Korean resident/domestic corporation (where the domestic corporation owns 100% of the shares), and Korean public officials working abroad, are deemed residents regardless of days spent outside Korea (Enforcement Decree Art. 3).
Crew-member usual-residence rule
For a crew member of a vessel or aircraft on an overseas route, the domicile is deemed to be in Korea if their cohabiting family's residence, or the place they usually reside during off-duty time, is in Korea (and deemed overseas if that place is abroad) (Enforcement Decree Art. 2(5)).
South Korea at a glance
- Tax year
- 1 January – 31 December (the income/tax year aligns with the calendar year; annual returns are filed by 31 May of the following year).
- How days are counted
- Residency is based on total days of physical presence in Korea within the tax year; per expat-tax guidance the count includes both the arrival and departure days, and the days need not be consecutive. Korean law/official guidance does not publish an explicit "part-day = whole day" rule, so the precise treatment of partial days is not authoritatively confirmed.
- What residency means
- A resident is taxed on worldwide income (income from both Korean and foreign sources); a non-resident is taxed only on Korea-source income. Important first-years exception: a foreign resident who has lived in Korea for 5 years or less during the preceding 10-year period is taxed on Korea-source income plus only the foreign-source income that is paid in Korea or remitted to Korea (effectively a remittance basis); after more than 5 years in the last 10, full worldwide taxation applies.
- Notable regime
- Flat-tax election for foreign workers: qualifying foreign expatriates/employees who begin work in Korea by 31 December 2026 may elect a 19% flat rate (about 20.9% including the 10% local income surtax) on Korean-source employment income, available for up to 20 years from the first work day, but electing it forfeits all other deductions/credits. The 5-year/10-year remittance-basis treatment for newer foreign residents (above) also functions as a favorable regime for relocators.
Official source
National Tax Service (국세청). View the primary guidance ↗
Rule last checked against this source on 2026-05-27.
Count your days in South Korea
The day count is the one test you can actually calculate — the home, family and ties tests above, you can’t. Use a free calculator to see exactly how close you are to South Korea's 183-day threshold — or let Yuravia track it automatically across every country at once and warn you before you cross a line.
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Frequently asked questions
How many days can I stay in South Korea without becoming a tax resident?
According to National Tax Service (국세청), South Korea treats you as a tax resident at 183 days in the calendar year (1 January – 31 December) (the "183-day residency (calendar year)"). Staying under that is necessary but not sufficient — a permanent home, family, or your centre of vital interests can make you resident on fewer days.
Is the day count the only way to become a tax resident of South Korea?
No. Beyond the day count, South Korea can treat you as resident through domicile in korea, occupation usually requiring 183+ days residence, cohabiting family + occupation/property status, substantial assets / property in korea, centre of general living relationship (vital interests), deemed-resident dispatched executives/employees and public officials, crew-member usual-residence rule — any one of these can apply even if you stay well under 183 days. They don't depend on counting days, so confirm them against your own circumstances.
What counts as a day of presence in South Korea?
In most jurisdictions any day on which you are physically present — including the arrival and departure days — counts as a full day. Treating both as counted is the conservative assumption. Always confirm the exact rule with National Tax Service (국세청).
What is the official source for South Korea's tax-residency rule?
National Tax Service (국세청). The rule on this page was last checked against that source on 2026-05-27. Thresholds and tests change, so confirm before relying on it.
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