Which Foreign Employees Can Skip Korean National Pension — and the Form That Proves It

A foreign employee at a Korean company pays into the national pension exactly as a Korean national does — 9.5% of standard monthly income in 2026, split with the employer. Three routes out of that exist. Only one of them is realistically available to an assignee from a head office, it depends on a document issued abroad, and none of the three applies itself.

That last point is where the money goes. The exemption is a filing, not a status.

Is your foreign employee actually required to join?

Start from the default, because the default is coverage. The National Pension Service is explicit that a foreigner residing in Korea is subject to compulsory coverage of the national pension scheme just as a Korean national is. A foreigner aged 18 to under 60 working at a covered workplace is a workplace-based insured person from day one. A foreigner in the same age band who is not employed at a covered workplace becomes an individually insured person instead.

Against that default the NPS sets out three exclusions, and they are not alternatives to be chosen between. They apply in a fixed order and to different people.

The first is narrower than it sounds. A trainee is excluded, but the NPS adds that a person employed after training is subject to coverage — so the exclusion ends at the point the training ends, not at the end of the visa.

The second catches almost nobody a foreign-invested company hires. It is a mirror rule: if the employee’s home country does not mandatorily cover Korean nationals under its own public pension scheme, Korea does not cover its nationals either. That describes a set of countries with limited public pension provision, not the OECD states most assignees come from.

Which leaves the third route, and that is the one worth understanding properly.

Ten agreements exempt, thirty exempt and totalize, and two do neither

An agreement existing between Korea and a country is not the same as an exemption existing. The NPS status table sorts every agreement into a type, and the type is what decides whether your assignee’s payroll line disappears.

The bottom row is the one that catches people. A finance manager who checks whether Korea has an agreement with Vietnam, finds that it entered into force on 1 January 2024, and instructs payroll to stop the pension deduction has just created an underpayment. The Vietnam agreement is a totalization agreement. It helps a Vietnamese national qualify for a pension decades later by counting Korean and Vietnamese periods together. It does not release anybody from a contribution today. New Zealand, in force since 1 March 2022, works the same way.

Reading the type column takes ten seconds and it is the difference between a correct payroll and a corrected one.

The certificate is issued abroad, and NPS wants the original

Where an exemption is available, it runs on one document: a certificate of coverage confirming that the employee remains insured under the home country’s scheme for the period of the posting. The NPS lists it as one of the three exclusions from coverage, and describes it precisely — a foreigner who submits an original copy of a certificate of coverage under the agreement of a contracting state.

Two practical consequences follow from that sentence.

The certificate comes from the home institution, not from anyone in Korea. The Social Security Administration issues it for a US assignee, HM Revenue & Customs for a British one, Deutsche Rentenversicherung Bund for a German one, Japan Pension Service for a Japanese one. Nothing about the process starts in Seoul, which is why it stalls: the Korean entity cannot chase it, and the head office does not know it is on the critical path for a payroll run.

And an original is an original. A PDF forwarded by the parent’s HR team is not what the rule asks for. Build the lead time in — the certificate should be requested when the assignment is agreed, not when the first payslip is being prepared.

Each agreement also sets its own detachment period, and the periods differ. The country pages on the NPS site carry the term for each one, and it is worth reading the specific page for the country in question rather than assuming a common figure. An assignment that outlasts the detachment period does not simply continue exempt; coverage in Korea resumes.

Health insurance has its own exit, and it closes after 14 days

A pension exemption does nothing for health insurance. They are separate schemes administered by separate agencies, and the agreement that releases an assignee from national pension leaves the health premium exactly where it was. This is the single most common misreading of a certificate of coverage.

Health insurance has its own, much narrower exit. The National Health Insurance Service compulsorily enrols foreigners and overseas Koreans who reside and work at an insured company, and then allows an application for exclusion in one situation: where the employee proves entitlement to medical benefits equivalent to Korean health insurance benefits under a foreign law, under a foreign insurance policy, or under a contract with the employer.

The timetable is the trap. The exclusion is filed on an Employee Health Insurance Withdrawal Application, and where it is submitted within 14 days of the date the acquisition of eligibility was reported, the date of acquisition becomes the date of loss. Outside that window the enrolment stands.

Fourteen days is short for a new expatriate hire whose global medical plan documentation sits with a benefits team in another timezone. A foreign-invested employer that routinely places senior assignees on a parent-company medical scheme should treat this as part of onboarding rather than as something to look at once the first premium appears. The rest of the enrolment mechanics — and what the four schemes cost in total — sit in our note on what Korea’s four major insurances cost an employer in 2026.

What happens to the contributions a leaver already made

When a foreign employee leaves Korea, whether they can recover their own contributions turns on nationality and visa, not on the size of the balance.

The NPS table, dated 15 June 2026, sets out three routes. Nationals of 24 agreement countries can claim a lump-sum refund. Nationals of a further 26 countries can claim it via reciprocity, though eight of those require at least a year of insured contributions and Belize requires six months. And anyone insured on an E-8, E-9 or H-2 visa can claim it irrespective of nationality — which is how most non-professional employment ends up refundable regardless of where the worker is from.

Some nationalities are excluded by their own agreement. The NPS states that payment of the lump-sum refund to Irish, Danish, Spanish, Swedish, Finnish and New Zealand nationals is not permitted, while Swiss nationals may claim. A New Zealand assignee therefore contributes throughout the posting and cannot take the money out — the agreement gives them a totalized entitlement later instead.

Where a refund is payable, it carries interest at the three-year fixed deposit rate. The claim expires five years after entitlement arises, though the NPS allows a re-application within ten years of the claimant reaching 60.

That last one is an employer obligation with no cost attached and a real consequence for the employee, and it is routinely missed because the resignation report is batched with everything else at month end. Filing it as soon as the departure date is fixed takes minutes.

Where the errors actually cluster

Two patterns account for most of what we see corrected.

The first is treating nationality as the determinant of everything. It determines the pension exemption and the refund. It does not determine health insurance, which is compulsory for foreign employees regardless of where they are from and exits only through the 14-day route. Nor does it determine income tax treatment, which runs on residence and on separate elections such as the flat tax rate for foreign employees.

The second is applying a group answer to individuals. A Korean subsidiary with six expatriates from four countries has four different pension positions and possibly four different refund positions. There is no policy that resolves them together. Each has to be established before the first run, because unwinding an incorrect enrolment later means corrected filings across multiple agencies and, where contributions were wrongly stopped, an arrears assessment against the employer.

If your Korean entity has more than a couple of foreign nationals on the payroll, this is a per-employee determination worth making once and documenting properly — and it is part of what our payroll outsourcing service establishes at onboarding rather than at correction. If you have one foreign employee on a straightforward local hire, the eligibility tables on the NPS site will answer it in an afternoon and you do not need anyone’s help to read them.

Figures current as at 26 August 2026, read from the National Pension Service and the National Health Insurance Service. Agreement counts, country lists and refund eligibility are revised as new agreements enter into force — the NPS lump-sum refund table cited here is dated 15 June 2026. This is general information about how Korean social insurance applies to foreign nationals, and not advice on any particular employee’s position.