Quick answer: Most foreigners working in Korea must join the National Pension just like Korean nationals. In 2026 the contribution is 9.5% of standard monthly income, split 4.75% each between employee and employer, on income between KRW 410,000 and KRW 6,590,000 a month (July 2026 to June 2027). A lump-sum refund on leaving depends on nationality or visa: citizens of agreement or reciprocity countries such as the US and Canada qualify, as do E-8, E-9 and H-2 visa holders.
Updated: 2026-10-10
The National Pension Service (Gukmin Yeongeum, often abbreviated NPS) is Korea's mandatory public pension system, established in 1988 and now the world's third largest pension fund by assets under management at roughly KRW 1,458 trillion (about USD 1.0 trillion) as of December 2025. It is funded by mandatory contributions of 9.5 percent of monthly income in 2026 (rising 0.5 points a year to 13 percent in 2033) from working-age residents and pays old-age pensions from age 63 for people born 1961 to 1964, rising to 65 for those born in 1969 or later (up from 60 for those born before 1953).
For foreign workers in Korea, NPS contribution is mandatory in most cases, identical in rate and structure to the Korean employee experience. Many foreign workers find this surprising on arrival because most expatriate-friendly OECD jurisdictions exempt non-citizens from local pension systems or allow opt-out. Korea generally does not. The compensating mechanism is the lump-sum refund (ban-hwan-il-si-geum) available on permanent departure, plus the totalization agreement network that allows credit periods from each country to be combined for eligibility purposes.
The financial stakes are non-trivial. A foreign worker earning 80 million KRW annually contributes about 3.7 million KRW per year to NPS at 2026 rates (4.75 percent of the capped monthly income), so a 36-month assignment accumulates roughly 11 million KRW of employee contributions plus accrued interest by departure, more as the rate rises each year. For high-earning expatriates the lump sum can exceed 30 million KRW. Understanding when to take the refund versus when to maintain contributions and claim a future Korean pension is a meaningful retirement planning decision.
NPS contribution is mandatory under Article 6 of the National Pension Act for all employed residents aged 18 to 59 working in Korea, with limited exceptions. For foreign workers the rule is essentially the same as for Korean nationals: if you have a Korean employment contract and a Korean payroll deduction, you contribute.
The exemption categories that may apply to foreigners:
| Component | Rate | Monthly amount on 5M KRW salary | Annual on 60M KRW |
|---|---|---|---|
| Employee contribution | 4.75% | 237,500 KRW | 2,850,000 KRW |
| Employer contribution | 4.75% | 237,500 KRW | 2,850,000 KRW |
| Total NPS contribution | 9.5% | 475,000 KRW | 5,700,000 KRW |
The contribution base is monthly standard income, with a floor of 410,000 KRW and a ceiling of 6,590,000 KRW for July 2026 to June 2027 (400,000 and 6,370,000 KRW from July 2025 to June 2026). Workers earning above the ceiling pay only on the ceiling amount. The floor and ceiling are adjusted every July in line with average income growth.
Monthly standard income is recalculated each July based on the prior calendar year's total wages and applies through the following June. Mid-year hires use the contracted monthly salary as the standard income for the first cycle.
Article 126(4) of the National Pension Act extends the Article 77 lump-sum refund to foreign nationals leaving Korea permanently who meet at least one of the eligibility criteria.
Eligibility criteria for the refund:
Under the NPS list dated 15 June 2026, nationals of 24 countries qualify through a social security agreement: Germany, the United States, Canada, the Czech Republic, Hungary, Australia, France, Belgium, Bulgaria, Poland, Slovakia, Romania, Austria, India, Türkiye, Switzerland, Brazil, Peru, Luxembourg, Slovenia, Croatia, Uruguay, the Philippines and Argentina. Nationals of 26 countries and territories qualify through reciprocity: Belize (after at least 6 months of coverage); Grenada, Jordan, Saint Vincent and the Grenadines, Zimbabwe, Cameroon, Thailand, Bhutan and Laos (after at least 1 year); and Ghana, Sri Lanka, Bermuda, Malaysia, El Salvador, Indonesia, Kenya, Kazakhstan, Hong Kong, Trinidad and Tobago, Sudan, Colombia, Vanuatu, Tunisia, Uganda, Cambodia and the Solomon Islands. Nationals of other countries, including the United Kingdom, Japan, China, Vietnam, Ireland, New Zealand, Spain, Italy, the Netherlands and the Nordic countries, can get the refund only for periods insured on an E-8, E-9 or H-2 visa.
Refund calculation: The lump sum equals total contributions paid (employee plus employer) plus interest calculated at the 3-year fixed deposit rate (not the NPS fund's investment return). The base monthly contribution at the floor (410,000 × 9.5 percent = 38,950 KRW per month from July 2026) is the minimum amount; the ceiling contribution (6,590,000 × 9.5 percent = 626,050 KRW per month) is the maximum.
Application process: The departing foreigner submits an Application for Lump-sum Refund or Lump-sum Death Payment to an NPS office (or, from abroad, by post or through an agent) within 5 years of departure date. Required documents when applying in Korea: the application, passport, Alien Registration Card, proof of a bank account and evidence of departure within one month; from abroad: the application, passport, proof of a bank account and an application for overseas remittance, with overseas documents notarised and apostilled or attested by a consulate. Processing typically takes 30 to 90 days. Payment can go to a Korean bank account or by overseas remittance, or be collected in cash in one of 16 foreign currencies at Incheon Airport on the day of departure (airport cash is not available in KRW).
Korea has social security agreements in force with 42 partners as of May 2026 (41 countries plus Quebec), and one more signed with Morocco; 32 of them also combine pension credits, while the other ten only exempt posted workers from double contributions. The largest and most actively used agreements:
| Country | In force since | Detachment limit (months) | Notable features |
|---|---|---|---|
| United States | 2001 | 60 | Most-used; covers Social Security & Medicare |
| Canada | 1999 | 60 | Covers OAS, CPP, QPP |
| United Kingdom | 2000 | 60 | Covers State Pension |
| Germany | 2003 | 60 | Covers DRV statutory pension |
| France | 2007 | 60 | Covers CNAV and AGIRC-ARRCO |
| Australia | 2008 | 60 | Covers Superannuation Guarantee |
| Japan | 2005 | 60 | Covers Kokumin Nenkin and Kosei Nenkin |
| Türkiye | 2015 | 60 | Covers SGK (Sosyal Güvenlik Kurumu) |
| India | 2011 | 60 | Covers EPFO Employee Provident Fund |
| China | 2013 | 60 | Covers urban worker basic pension |
Each agreement has specific rules, but the core mechanism is consistent: a worker sent on temporary assignment from one country to the other can remain on the home pension system for the detachment limit (typically 60 months) by obtaining a Certificate of Coverage from the home pension authority. The certificate exempts the worker from the host country's pension contributions during the detachment period.
For long-term assignments beyond the detachment limit, the worker contributes to the host country's pension system. Credit periods from each country can be combined to meet eligibility thresholds (e.g., the Korean 10-year minimum contribution requirement), though actual pension benefits are calculated only on the contributions paid to each respective system.
Trader A is a US citizen working in Seoul on an E-7 visa for 4 years (48 months) starting March 2022. Annual salary: USD 120,000 (approximately 165 million KRW). Korean payroll deductions apply.
Decision 1: Apply for Certificate of Coverage from US Social Security? Under the US-Korea totalization agreement, Trader A's 48-month assignment is within the 60-month detachment limit. She is eligible to remain on US Social Security and avoid Korean NPS contributions. If she does so, she pays approximately USD 7,440 per year in US Social Security tax (6.2 percent of USD 120,000, plus Medicare) and saves NPS employee contributions of about KRW 3.0 to 3.4 million per year at the 2022 to 2025 income ceilings (roughly USD 2,200 to 2,500). Net cost difference: she pays more on US Social Security but maintains continuous US credit history. This is the dominant choice for short-term US expatriates.
Decision 2: Already in NPS, plans to leave Korea after 4 years? If for some reason (employer error, late notification, etc.) Trader A was enrolled in NPS for the full 48 months, she would have contributed approximately KRW 12,772,000 cumulatively (4.5 percent of the income ceiling in force each year, 4.75 percent from January 2026, over 48 months) plus a matching employer contribution and interest at the 3-year fixed deposit rate. Total refundable lump sum: roughly KRW 25,500,000 plus interest (about USD 18,600 at 1,375 KRW per USD) after 48 months.
Decision 3: Refund or maintain credit? With only 4 years of credit, Trader A cannot draw a Korean pension at retirement directly. With totalization, her 4 years of NPS plus 30 years of US Social Security contributions could be combined for eligibility purposes but the actual Korean pension would be calculated only on her 4 years of NPS. The expected monthly benefit at age 65 would be approximately KRW 100,000 to 150,000 per month (USD 70 to 110), or roughly USD 1,200 per year. Net present value at age 65 with 25-year payout: roughly USD 20,000. Taking the lump sum at age 30 instead and investing at 7 percent for 35 years would produce approximately USD 200,000. The lump-sum refund is the dominant choice for short-tenure expatriates.
The lump-sum refund is subject to Korean withholding tax at 22 percent (20 percent national plus 2 percent local) by default. Most tax treaties contain a pension article that limits Korea's right to tax pension lump sums; treaty-eligible recipients can claim relief. For US recipients, the US-Korea Tax Convention Article 21 (Pensions) generally limits Korean taxing right to residency-based test, allowing departing US residents to claim full Korean tax relief.
The home-country tax treatment varies. US residents typically include the lump sum in ordinary income on Form 1040 line 5b (pensions) and may claim foreign tax credit for any Korean tax actually paid. UK residents typically include in self-assessment as foreign pension income with full credit for Korean tax under the UK-Korea treaty.
Contribution rate and base figures come from the National Pension Service Annual Report 2025 and the 2026 contribution-base announcement published in February 2026. Worked example contributions use the NPS income ceiling in force each year; refund interest follows the NPS rule that it is calculated at the 3-year fixed deposit rate, so it is shown separately.
Totalization-agreement detachment limits are taken directly from each bilateral agreement text published in the Korean Ministry of Health and Welfare International Agreements compendium. The lump-sum refund eligibility list is from NPS official guidance for Foreign Workers 2026 (English version available on the NPS international site).
Yes for most. Foreign workers aged 18 to 59 employed by a Korean company are mandatorily enrolled in the National Pension Service (NPS) under Article 6 of the National Pension Act. The same contribution rate applies: 9.5 percent in total for 2026 (4.75 percent employee, 4.75 percent employer). Exemptions exist for citizens of countries with no reciprocal pension agreement that explicitly prohibits the contribution requirement; this is a narrow list including only Iran, Vietnam, and a handful of other countries as of 2026.
The total contribution rate is 9.5 percent of monthly standard income in 2026, split equally between employee (4.75 percent) and employer (4.75 percent), and it rises by 0.5 points a year to 13 percent in 2033. Monthly standard income is capped between a floor of 410,000 KRW and a ceiling of 6,590,000 KRW for July 2026 to June 2027 (400,000 and 6,370,000 KRW until June 2026), adjusted annually with average wage growth. High-income earners therefore pay a maximum 313,025 KRW per month employee contribution from July 2026. The standard income is recalculated annually based on the previous year's total wages, applying to July through June of the next year.
Yes, under specific conditions. Article 126(4) of the National Pension Act extends the Article 77 lump-sum refund (ban-hwan-il-si-geum) to foreign nationals leaving Korea permanently who meet at least one of these criteria: (a) their home country pays Korean nationals an equivalent refund (reciprocity), (b) Korea and their home country have a social security agreement that provides for the refund, or (c) the contributions were paid while on an E-8, E-9 or H-2 visa. The refund covers all contributions (employee and employer shares) plus interest at the 3-year fixed deposit rate. Refund is calculated and paid within 30 to 90 days of application, to a Korean or overseas bank account or, on the day of departure, in cash at Incheon Airport.
A totalization agreement (sometimes called a social security agreement) is a bilateral treaty that prevents double pension taxation and allows pension credit periods from each country to be aggregated. Korea has social security agreements in force with 42 partners as of 2026 (41 countries plus Quebec) including the United States, United Kingdom, Canada, Germany, France, Italy, Japan, Australia, China, Hungary, India, Iran, Czech Republic, Denmark, Belgium, Bulgaria, and most EU member states; ten of them, including those with the United Kingdom, Japan, China and Italy, only prevent double contributions and do not combine credits. Each agreement has specific rules; the US-Korea agreement (effective 2001) is the most-used by expatriates.
Under the US-Korea Social Security Agreement, a US worker temporarily assigned to Korea for less than 60 months can remain on US Social Security and avoid NPS contributions by obtaining a Certificate of Coverage from the US Social Security Administration. Conversely, a Korean worker temporarily in the US for less than 60 months can remain on NPS. For longer-term assignments, contributions are paid in the host country and credit periods from each country can be combined for eligibility purposes when retirement benefits are claimed, but the actual benefit calculation uses only contributions to that specific country's system.
The standard minimum is 10 years (120 months) of contributions for an old-age pension benefit. Foreign workers who do not reach 10 years before leaving Korea typically take the lump-sum refund instead. With a totalization agreement, contribution periods from the home country can count toward eligibility (but not toward the actual benefit amount calculation). For example, a US worker with 4 years of NPS contributions plus 30 years of US Social Security contributions could potentially qualify for a Korean partial pension at retirement age, calculated only on the 4 years of NPS payments.
The lump-sum refund is subject to Korean withholding tax. The default withholding for non-resident lump-sum recipients is 22 percent (20 percent national plus 2 percent local surtax) on the gross refund amount. However most tax treaties (including US-Korea, UK-Korea, Germany-Korea) limit Korean tax on pension lump sums; treaty-eligible recipients can claim relief and recover most or all of the withholding through the refund application process. The home country may then tax the lump sum under its domestic rules; US recipients typically pay ordinary income tax on the gross amount minus foreign tax credit for any Korean tax retained.
Generally no. Foreigners are covered by NPS only while they work or live in Korea, as workplace-based or individually insured persons, and voluntary continued membership under Article 13 of the National Pension Act is only for members who reach age 60 and ends when the member emigrates. A foreigner who leaves Korea before reaching the 10-year minimum therefore either takes the lump-sum refund, if their nationality or visa qualifies, or keeps the credited period for a future pension claim, including under a totalization agreement.