Foreigners working just one month in Korea collect lifetime pensions through retroactive payment loophole

A growing number of foreigners are enrolling in South Korea's national pension for as little as one month, then making a lump-sum retroactive payment covering years of missed contributions to qualify for lifetime monthly benefits — raising questions about whether a system designed to protect vulnerable workers is being exploited.

According to the National Pension Service, branch offices across the country have confirmed multiple cases of foreign nationals enrolling in the national pension for a short period, then making large retroactive payments to meet the 120-month, or 10-year, minimum contribution period required to receive an old-age pension.

One Chinese national, identified only as A, entered South Korea on an H-2 visa, enrolled in the national pension through an employer for just one month, then turned 60. Originally eligible only for a lump-sum refund of contributions, A determined that receiving a monthly old-age pension would be more advantageous and made a retroactive payment covering 119 months' worth of premiums at once. A now receives a monthly pension after meeting the eligibility requirements.

Another Chinese national, B, enrolled in the national pension for one month as a daily construction worker, then left the country and collected a lump-sum refund. B later returned to Korea, enrolled for another month, continued enrollment voluntarily for one additional month, repaid the previously refunded amount and made a retroactive payment for 119 months — accumulating a total of 121 months of enrollment and qualifying for pension benefits.

A third Chinese national, C, who holds a permanent residency visa (F-5), enrolled for nine months before becoming ineligible for a lump-sum refund. C then made a retroactive payment covering 128 months, applied for an early old-age pension and now receives benefits while living in China.

The National Pension Service has raised structural concerns about the retroactive payment system through multiple internal channels in response to these cases. A central criticism is that foreign nationals using the system runs counter to its original purpose: protecting the pension rights of career-interrupted homemakers and low-income workers.

The retroactive payment scheme allows subscribers to pay premiums after the fact for periods when they were exempt from contributions — such as during unemployment or business closure — or for gaps in enrollment caused by marriage or childbirth.

First introduced in 1999, the system was expanded in November 2016 to allow retroactive payments of up to 119 months for periods when subscribers were exempt from enrollment, including non-income-earning spouses and recipients of basic livelihood benefits.

The problem, officials say, is that foreign subscribers are also eligible to apply for retroactive payments, and any foreigner registered as a foreign national during a qualifying past period can apply without restriction for up to 10 years' worth of retroactive contributions. Applications have been consistently rising among foreigners holding F-2, F-4, F-5 and F-6 visas — particularly ethnic Koreans from China — driving a parallel increase in the number of foreign old-age pension recipients.

There are also concerns that expanding pension payouts through retroactive payments could strain the fund's finances. Verifying whether a foreign applicant is eligible, confirming a spouse's enrollment history and checking residency status are all difficult using domestic public records alone, raising the possibility that qualifying periods could be miscalculated.

Family relationship and marriage documentation formats vary by country and can be forged, making it hard for front-line staff to verify authenticity. A persistent risk also remains that the deaths of overseas pension recipients may go undetected in time, leading to improper payment of old-age benefits or gaps in the management of survivor pension payouts.

Concern is growing among National Pension Service branch staff as more foreign nationals use the refund repayment and retroactive payment systems to meet the 120-month eligibility threshold.

Calls are mounting for the government to promptly overhaul the retroactive payment and benefit eligibility standards for foreign nationals in order to preserve public trust in the pension system and ensure its long-term sustainability.