UK Spouse on an F-6 Visa Freelancing for a British Company: When Does Korea Start Taxing You?

Terminology

 

The following abbreviations are used throughout this article.

• ITA: Income Tax Act of Korea (소득세법). "ITA-ED" refers to its Enforcement Decree.
• VATA: Value-Added Tax Act of Korea (부가가치세법). "VATA-ED" refers to its Enforcement Decree.
• RSTA: Restriction of Special Taxation Act of Korea (조세특례제한법).
• Korea–UK Tax Treaty: Convention between the Government of the Republic of Korea and the Government of the United Kingdom for the Avoidance of Double Taxation and the Prevention of Fiscal Evasion with respect to Taxes on Income and Capital Gains.
• SMA: Seoul Metropolitan Area (수도권)

  ---

1. Question

Hello. I am a British national who moved to Korea this spring on a marriage (F-6) visa and have been living here with my Korean spouse for nearly six months. Since before the move, I have held a freelance service contract with a UK company, and I now perform the same work remotely from our home in Korea, paid in pounds sterling (GBP) into my UK account.

I want to prepare for next May's global income tax filing — bookkeeping, business registration, and so on. From what point am I treated as a Korean tax resident? From which point must my income be reported to the Korean National Tax Service, and how much do I still report to HMRC in the UK?

 

📌 The short answer first

 

① If you settled in Korea with family you live with, you likely became a Korean tax resident from around your arrival date. The well-known "183-day rule" is a fallback test that applies only when a domicile in Korea is not established.

 

② Income from work you physically perform in Korea should be treated as reportable in Korea, even though a UK company pays you in GBP into a UK account. The special rule taxing foreign-source income of foreign residents only upon remittance is unlikely to cover income earned by working in Korea.

 

③ The type of business registration (VAT-exempt vs. VAT-taxable) depends on the kind of services you provide, and it also largely determines whether the start-up SME tax reduction is available — settle the business category first, then register. The detailed grounds follow below.

---

2. Summary of Facts and Issues

A. Summary of facts

The taxpayer is a UK national who entered Korea in spring 2026 on a marriage immigration (F-6) visa and lives in Korea with a Korean spouse. A freelance service contract with a UK company predates the move, and the same services are now performed remotely from Korea, with fees paid in GBP. There appears to be no separate office and no employees, and no Korean business registration has been made yet. The taxpayer is preparing for the May 2027 filing of the 2026 global income tax return.

B. Issues

Issue ① From what point does the taxpayer become a resident under the Korean ITA?

Issue ② Once a resident, is the GBP freelance income fully taxable in Korea? (Interaction with the "five-year rule" for foreign residents)

Issue ③ Where is the dividing line between income reported to HMRC and income reported to Korea? (Korea–UK Tax Treaty)

Issue ④ What type of business registration is required? (VAT exemption, taxable status, zero-rating)

Issue ⑤ What bookkeeping method applies?

Issue ⑥ Does the new business registration qualify for the start-up SME tax reduction?

---

3. Relevant Provisions by Issue

If you are not interested in the statutory text, you may skip this section and go straight to 4. Tax Analysis.

A. Residency and the timing of becoming a resident (Issue ①)

ITA Article 1-2(1)

1. "Resident" means an individual who has a domicile in Korea or has maintained a place of residence in Korea for 183 days or longer.
2. "Non-resident" means an individual who is not a resident.
3. "Business operator" means a resident with business income.
   (Subparagraphs 3 and 4 concern corporations and are omitted as irrelevant here.)

ITA-ED Article 2 (Determination of Domicile and Place of Residence)
(1) Domicile is determined based on objective facts of one's living relationships, such as the existence of family sharing a livelihood in Korea and assets located in Korea.
(2) A place of residence (거소) is a place, other than the domicile, where a person dwells for a considerable period without forming the close, general living relationships characteristic of a domicile.
(3) An individual living in Korea is deemed to have a domicile in Korea in either of the following cases:

1. Where the person has an occupation that ordinarily requires continuous residence in Korea for 183 days or longer;
2. Where the person has family sharing a livelihood in Korea and is expected, in light of occupation and asset status, to reside in Korea continuously for 183 days or longer.

ITA-ED Article 2-2(1) (When a Person Becomes a Resident)
A non-resident becomes a resident at whichever of the following occurs:

1. The day the person establishes a domicile in Korea;
2. The day a circumstance arises under which the person has, or is deemed to have, a domicile in Korea under Article 2(3) or (5);
3. The day the period of maintaining a place of residence in Korea reaches 183 days.

ITA-ED Article 4 (Calculation of Period of Residence)
(1) The period of maintaining a place of residence in Korea runs from the day following entry to the day of departure.
(3) A person is deemed to have maintained a place of residence in Korea for 183 days or longer where the period is 183 days or longer within one taxable period (subparagraph 1) or continuously across two taxable periods (subparagraph 2). (Amended Feb. 28, 2025)

B. Scope of taxable income and the taxable period (Issues ②, ③)

ITA Article 3 (Scope of Taxable Income)
(1) A resident is taxed on all income prescribed by this Act. However, a foreign resident whose aggregate period of domicile or place of residence in Korea is five years or less within the ten years preceding the end of the relevant taxable period is taxed on foreign-source income only to the extent it is paid in Korea or remitted into Korea.
(2) A non-resident is taxed only on Korean-source income under Article 119.

 

ITA Article 5(1) (Taxable Period)
The taxable period runs from January 1 to December 31.

 

ITA Article 119, subparagraph 6 (Korean-Source Income of Non-Residents)
Korean-source personal service income: income arising from the provision of personal services prescribed by Presidential Decree within Korea. (Remainder omitted.)

 

ITA Article 19(1) (relevant subparagraphs only)
13. Income arising from professional, scientific and technical services;
21. Income similar to that under subparagraphs 1 through 20, earned through continuous and repeated activities carried on for profit on one's own account and responsibility.

 

ITA Article 57(1) (Foreign Tax Credit)
Where a resident's global income includes foreign-source income on which foreign income tax has been or is to be paid, the foreign tax may be credited against the computed global income tax within the credit limit.

 

Korea–UK Tax Treaty
Article 4 (Residence): tie-breaker rules (permanent home, centre of vital interests, etc.) where an individual is a resident of both states.
Article 14 (Independent Personal Services): income of a resident of one state from professional services or other activities of an independent character is taxable only in the state of residence, unless the person has a fixed base regularly available in the other state.
Article 23 (Elimination of Double Taxation): double taxation on the same income is relieved by way of tax credit.

C. Business registration and VAT (Issue ④)

ITA Article 168(1), (2)
A person newly commencing business must register with the head of the tax office having jurisdiction over the place of business. A person registered under the VATA is deemed registered under the ITA for that business.

 

VATA Article 8(1)
A business operator must apply for business registration for each place of business within 20 days from the commencement of business.

 

VATA Article 26(1), subparagraph 15, and VATA-ED Article 42, subparagraph 1
Personal services supplied by an individual in an independent capacity, without physical business facilities and without employing workers — writing, illustration, design, composition, music, directing and filming for entertainment, architectural supervision, academic services, and similar services — are exempt from VAT. (Amended Dec. 30, 2025)

 

VATA Article 24(1), subparagraph 3, and VATA-ED Article 33(2), subparagraph 1
Services supplied in Korea to a non-resident or foreign corporation with no place of business in Korea are zero-rated where the services fall within the listed categories — professional, scientific and technical services (item (b)); information and communications services such as software development, computer programming and data processing (item (f)); business support services (item (h)); and others — and the consideration is received in Korean won through a foreign exchange bank or by other prescribed methods. However, professional services within item (b) and services under items (h) and (i) are zero-rated only where the counterpart country grants the same exemption to Korean residents and corporations (reciprocity). (Amended Dec. 30, 2025)

 

VATA Article 28 (Waiver of Exemption)
Supplies eligible for zero-rating under Articles 21 through 24 (subparagraph 1), among others, may be excluded from exemption by filing a waiver.

 

ITA Article 78(1) (Report on Current Status of Place of Business)
VAT-exempt business operators must report the status of their place of business by February 10 of the year following the taxable period.

D. Bookkeeping and the filing deadline (Issue ⑤)

ITA Article 160 sets double-entry bookkeeping as the principle (paragraph (1)), while paragraphs (2) and (3) allow simplified books (간편장부) for business operators below prescribed size thresholds.

 

ITA-ED Article 208(5)
Persons eligible for simplified bookkeeping include business operators who newly commence business in the relevant taxable period (subparagraph 1). However, professional practitioners under VATA-ED Article 109(2), subparagraph 7 (lawyers, certified public accountants, certified tax accountants, professional engineers, architects, etc.) are excluded.

 

ITA Article 70(1) (Final Return of Global Income Tax Base)
A resident with global income for the taxable period must file between May 1 and May 31 of the following year.

E. Start-up SME tax reduction (Issue ⑥)

RSTA Article 6 (Tax Reduction for Start-up SMEs)
(1) A start-up SME that commences business in a listed category on or before December 31, 2027 is granted a reduction of income tax on income from that business, for the taxable year in which income first arises and the four following taxable years. For businesses commenced on or after January 1, 2026 (item (b)), the reduction rates are: 100% for youth start-ups outside the SMA or in designated depopulation areas within the SMA; 75% for youth start-ups elsewhere in the SMA (excluding overconcentration control zones); 50% for youth start-ups in SMA overconcentration control zones and for non-youth start-ups outside the SMA or in depopulation areas; and 25% for non-youth start-ups elsewhere in the SMA. Non-youth start-ups in SMA overconcentration control zones are not listed and receive no reduction. (Amended Dec. 31, 2024)
(3) Eligible categories include information and communications business (subparagraph 8, excluding video-viewing rooms, news agencies, and virtual asset trading/brokerage), professional, scientific and technical services (subparagraph 10, excluding lawyers, patent attorneys, judicial scriveners, CPAs, certified tax accountants, veterinarians, etc.), and business support services (subparagraph 11(b)).
(10) The following are not regarded as a start-up: conversion of an individual's existing business into a corporation (subparagraph 2); resuming the same business after closure (subparagraph 3); and cases where it is difficult to regard the activity as the first commencement of a new business, such as expansion of an existing business or addition of a business line (subparagraph 4).
(12) A person seeking the reduction must file an application.
(13) The reduction is capped at KRW 500 million per taxable year. (Inserted Dec. 31, 2024)

F. Provisions not applied

RSTA Article 18-2 (flat 19% rate election for foreign workers) applies only to employment income of foreign executives or employees, and therefore does not apply to freelance business income.

---

4. Tax Analysis

A note on terminology first. A resident is a person Korea taxes on worldwide income; a non-resident is taxed only on Korean-source income. A domicile (주소) is the base of one's life — family, assets, living relationships — while a place of residence (거소) is somewhere one stays for a considerable period without that depth of connection.

A. From when is the spouse a Korean resident? (Issue ①)

Case A: The person enters Korea on an F-6 visa after marriage, lives with the Korean spouse in their shared home, has given up the UK home, and intends to stay in Korea.
→ A domicile in Korea is likely recognized from around arrival, making the person a resident from the time of entry.

 

Case B: The person keeps a home and life base in the UK, enters alone for what was meant to be a short stay, and the stay simply lengthens.
→ A domicile is hard to establish, so residency begins on the day the place-of-residence period reaches 183 days.

 

It is widely believed that one must stay 183 days in Korea to become a resident, but the 183-day test concerns only the place of residence. Under the ITA, having a domicile in Korea makes one a resident immediately (ITA Article 1-2(1)1). Whether a domicile exists is judged by objective facts — family sharing a livelihood in Korea, assets in Korea (ITA-ED Article 2(1)) — and in particular, a person with family sharing a livelihood in Korea who is expected to reside in Korea for 183 days or longer in light of occupation and assets is deemed to have a domicile (ITA-ED Article 2(3)2).

 

This taxpayer entered on a marriage immigration visa, shares a livelihood with a Korean spouse, and works remotely, so nothing about the occupation prevents continued residence in Korea. This is Case A territory. Residency then begins on the day the domicile is established or the deeming circumstance arises — in practice, the arrival (or settlement) date (ITA-ED Article 2-2(1)1 and 2).

 

That said, domicile determination is fact-specific. The circumstances of entry, whether a UK home is retained, and the timing of alien registration can shift the conclusion. If no domicile is recognized, residency begins when the place-of-residence period, counted from the day after entry, reaches 183 days (ITA-ED Article 2-2(1)3; Article 4(1), (3)).

B. Is the GBP income fully taxable in Korea? (Issue ②)

Case A: After arrival, services are performed from the home in Korea; the UK company pays GBP into a UK account, and nothing is remitted to Korea.
→ The services were performed in Korea, so the income should be treated as taxable in Korea.

 

Case B: Rent from a house the person owns in the UK is paid into a UK account and never remitted to Korea.
→ This is genuinely foreign-source income, so for a foreign resident within the five-year threshold, the unremitted portion may escape Korean tax.

 

A resident is in principle taxed on worldwide income (ITA Article 3(1), main text). However, a foreign resident whose aggregate Korean domicile/residence period is five years or less within the preceding ten years is taxed on foreign-source income only to the extent paid in or remitted into Korea (ITA Article 3(1), proviso). This taxpayer, in the first year in Korea, satisfies the personal requirement of that rule.

 

The decisive question is whether fees for freelance work performed in Korea count as "income arising outside Korea." The ITA has no general sourcing rule for residents' income, but for non-residents it treats income from personal services provided within Korea as Korean-source (ITA Article 119, subparagraph 6). The generally accepted interpretation is that personal service income arises where the services are actually performed. Accordingly, even though the payer is a UK company, the currency is GBP, and the account is in the UK, income earned by working in Korea should be treated as arising in Korea and reported in full. We note candidly that this rests on interpretation rather than an explicit sourcing provision for residents.

 

There is also little practical benefit in arguing otherwise: the moment funds are remitted to Korea for living expenses, the remitted amount becomes taxable in any event. The five-year rule matters mainly for income that both arises and stays abroad — UK rental income, UK interest, and the like.

C. The dividing line between the UK and Korea (Issue ③)

Korea's taxable period is the calendar year (ITA Article 5(1)), so the year of arrival contains both a non-resident period and a resident period. Fees for services performed in the UK before arrival are not Korean-source income and are not taxed in Korea (ITA Article 3(2)); Korean reporting begins with income from the point of becoming a resident.

Period	Where Services Peformed	Korea Filing	UK Filing
Before arrival (non-resident)	UK	Not reportable	Report as UK resident income
After arrival (resident)	Korea	Report in May 2027	Depends on UK residency (below)

Whether the UK also taxes the post-arrival income depends on UK residency rules. The UK applies the Statutory Residence Test, its tax year runs from April 6 to April 5, and in the year of departure split-year treatment may divide the tax year into UK-resident and non-resident parts if the conditions are met. This belongs to UK law, so the UK-side reporting scope should be confirmed with a UK tax adviser.

 

If any period arises in which both countries treat the person as a resident, the Korea–UK Tax Treaty Article 4 tie-breaker (permanent home, centre of vital interests, and so on) assigns a single residence state — very likely Korea for a person whose home and spouse are in Korea. And income of a Korean resident from independent personal services performed in Korea is taxable only in Korea unless a fixed base is regularly available in the UK (Korea–UK Tax Treaty Article 14). Whether a given contract falls under the treaty's business profits article instead may depend on its terms, but with no UK establishment the outcome is generally the same.

 

If the UK company has nonetheless withheld UK tax, or UK tax otherwise becomes payable, first examine whether it can be reclaimed in the UK under the treaty; any residue may be examined for the foreign tax credit on the Korean return (ITA Article 57(1); Korea–UK Tax Treaty Article 23). Note, however, that the Korean credit presupposes foreign-source income, so whether UK tax paid on Korea-performed services is creditable requires case-by-case analysis. Preventing double taxation at source is the surest route.

D. Business registration type (Issue ④)

Case A: Personal services an individual provides without an office or staff — translation, writing, illustration, composition.
→ Register as a VAT-exempt business.

 

Case B: Services in a VAT-taxable category — software development, IT consulting, marketing services.
→ Register as a VAT-taxable business and examine zero-rating.

 

Providing freelance services continuously and repeatedly makes one a business operator with business income (ITA Article 19(1); Article 1-2(1)5), triggering the registration obligation (ITA Article 168(1)). The registration type turns on the nature of the services.

 

If, as in Case A, the services fall within the personal services listed in VATA-ED Article 42, subparagraph 1, supplied without physical facilities or employees, they are VAT-exempt (VATA Article 26(1)15). The person then registers as an exempt business under the ITA and files the business-status report by February 10 each year (ITA Article 78(1)).

 

If, as in Case B, the services are VAT-taxable, registration under the VATA is due within 20 days of commencing business (VATA Article 8(1)). Services supplied to a UK company with no place of business in Korea can then be zero-rated if the business category matches VATA-ED Article 33(2), subparagraph 1 and the consideration is received in won through a foreign exchange bank or another prescribed method. Two cautions here.

 

First, the method of receiving payment. Leaving GBP indefinitely in a UK account may fail the receipt requirement; structuring payment into a Korean foreign exchange bank account is advisable.

 

Second, reciprocity. Professional services (within item (b)) and business support services (item (h)) are zero-rated only where the UK grants an equivalent exemption to Korean suppliers (VATA-ED Article 33(2)1, proviso), so reciprocity must be checked per category. Software development and similar item (f) services are not subject to that proviso.

 

Where a service is exempt but would also qualify for zero-rating, the exemption may be waived in favor of zero-rating (VATA Article 28, subparagraph 1). This is worth considering when input VAT refunds on equipment are meaningful, but it brings VAT filing obligations, so decide carefully.

 

If services have already been provided since arrival, the commencement date will be taken as the day services began during the resident period — so register without delay once the business category is settled. Late registration of a taxable business can trigger penalties.

E. Bookkeeping (Issue ⑤)

Double-entry books are the statutory principle (ITA Article 160(1)), but a business operator newly commencing business in the taxable period qualifies for simplified books (ITA-ED Article 208(5)1). Professional practitioners listed in VATA-ED Article 109(2), subparagraph 7 — including professional engineers and architects — are excluded even in their first year and must keep double-entry books.

F. Start-up SME tax reduction (Issue ⑥)

Case A: A software development freelancer registers in an ordinary SMA location (not an overconcentration control zone), never having conducted this business in the UK.
→ This is a start-up in an eligible category and may qualify (75% if a youth entrepreneur; 25% otherwise).

 

Case B: The person continues supplying the identical services to the same UK client as before, and merely adds a Korean business registration.
→ There is a risk that "start-up" status itself is denied on the ground that no new business has been first commenced.

 

Whenever a new business registration is made, the start-up SME reduction under RSTA Article 6 deserves review: it can reduce income tax by 25% to 100% for five taxable years from the year income first arises (RSTA Article 6(1)). The applicant must be a "domestic person," a term that includes residents under the ITA — so UK nationality alone is no bar once residency is established.

 

Three gates must be cleared in this case.

 

First, the business category. The reduction applies only to the categories listed in RSTA Article 6(3): information and communications (software development and the like), professional, scientific and technical services, and business support services qualify, whereas pure freelance personal services such as translation and writing often fall outside the listed categories. The industry code chosen at registration — within the bounds of what the services actually are — largely determines eligibility.

 

Second, whether a "start-up" exists at all. Activities that cannot be regarded as the first commencement of a new business — such as expanding an existing business — do not count as a start-up (RSTA Article 6(10)4). Where a business previously carried on in the UK simply continues in Korea with the same client, whether the Korean registration is a "first commencement" is an area of interpretation with no explicit statutory answer, and the tax authority may deny start-up status. If the reduction is material to your planning, obtain an advance confirmation or professional review before relying on it.

 

Third, location and age. For post-2026 start-ups, the rate ranges from 100% down to 25% depending on whether the entrepreneur qualifies as a "youth" (age criteria set by Presidential Decree — confirm before registering) and where the business is established; a non-youth founder in an SMA overconcentration control zone receives no reduction (RSTA Article 6(1)1(b)). For a home-based freelancer, the residence is the place of start-up, so where you settle determines the rate.

An application is required (RSTA Article 6(12)), and the annual cap is KRW 500 million (RSTA Article 6(13)).

G. Practical management

First, document the arrival date and residency evidence: immigration records, the alien registration date, the marriage registration date, and the housing contract all support the residency start date.

 

Second, split income around the arrival date. Sort UK invoices by service-performance period, and for any invoice straddling the arrival date, keep a defensible allocation basis so the Korea/UK boundary stays clean.

 

Third, apply one consistent exchange-rate convention. GBP income must be reported in won; in practice, fix one basis — such as the basic or arbitrated exchange rate under the Foreign Exchange Transactions Act on the date of receipt — apply it throughout, and keep the foreign-currency account statements.

 

Fourth, collect expense documentation: laptops, software subscriptions, and communication costs are deductible far more smoothly with qualifying evidence.

 

Fifth, coordinate with a UK adviser so that, given the mismatched tax years, no period is double-reported or missed between HMRC and the NTS.

---

5. Conclusion

A foreign national who has settled in Korea with a Korean spouse on an F-6 visa is likely to be treated as having a domicile in Korea — and therefore as a resident — from around the arrival date. From that point, freelance income for work performed in Korea should be treated as reportable on the May 2027 Korean global income tax return, even though a UK company pays it in GBP.

 

The conclusion may differ, or further review is needed, where the person retains a home and life base in the UK such that no Korean domicile is recognized; where a fixed base such as an office is regularly available in the UK; where part of the services were performed while physically in the UK after the move; or where the UK company has withheld UK tax.

 

There are also mitigating elements: pre-arrival UK earnings are not taxed in Korea; UK-situs income that stays abroad may remain untaxed under the five-year rule for foreign residents so long as it is not remitted; and taxable-category services can be zero-rated for VAT where the requirements are met. In addition, where the business falls within an eligible category such as software development and the registration is recognized as a genuine start-up, the start-up SME reduction may substantially lower the income tax burden (RSTA Article 6).

 

What matters is not where the money was paid from, but where you live and where you did the work.

Residency determination, start-up status, and the UK reporting scope are all fact-dependent, so we recommend consulting professionals on both the Korean and UK sides — with your entry records and contract in hand — before completing registration and filings.

 

---

Disclaimer

This article is intended to provide general information on Korean tax law and does not constitute tax advice on any specific matter. Actual tax consequences may vary depending on individual facts, statutory amendments, and the tax authorities' interpretation. Please consult a qualified professional before making any significant decision. The author accepts no liability for consequences arising from reliance on this article.