ISA in Korea: A Foreign Resident's Guide to the Individual Savings Account

Every Korean adult has access to an Individual Savings Account (개인종합자산관리계좌, ISA). Foreign residents who qualify as Korean tax residents can open one too, and the rules are the same. This guide covers the operational layer: which subtype to choose, what the 3-year clock actually means for someone who might leave Korea, what you can invest in, how to open one at a brokerage, and a two-part tax-planning play at maturity that most foreign residents never hear about.

For eligibility basics, the 183-day residency gate, and how ISA fits into the full personal finance picture, read the hub guide on personal finance accounts for foreign residents first.

The flat-rate clarification: this is the one account the trap does not touch

If you have read the hub guide, you know about the flat-rate trap: foreign workers who elect the 19% flat income tax rate (조세특례제한법 제18조의2) forfeit all IRP and pension savings tax credits. Zero, not reduced.

The ISA is different. Read this clearly before moving on.

The ISA's tax benefit is not a contribution credit (세액공제). It is a tax exemption and reduced rate on gains inside the wrapper: gains up to ₩2M or ₩4M are tax-free, and gains above that limit are taxed at 9.9% instead of 15.4%. This is called 비과세/분리과세 treatment.

The flat-rate trap kills credits. It does not kill gain-side tax treatment. A foreign worker on the 19% flat rate can open an ISA and receive the full ₩2M or ₩4M tax-free gain exemption and the 9.9% discounted rate on the rest. The flat rate is irrelevant to ISA benefits.

If you are on the flat rate and have been skipping ISA on the assumption the trap applies: it does not apply here.

What makes the ISA worth opening

The ISA stacks three benefits in one wrapper:

Gain netting (손익통산). All positions inside the account are netted against each other before taxation. A ₩5M gain on one ETF and a ₩3M loss on another becomes a ₩2M net gain, not two separate taxable events.

Tax-free floor. For the general type (일반형), the first ₩2,000,000 of net gains per 3-year holding period is entirely tax-free. For the low-income type (서민형), the floor is ₩4,000,000 (as of May 2026, per FSC ISA Q&A and Mirae Asset ISA eligibility page).

Discounted rate on the rest. Net gains above the tax-free floor are taxed at 9.9% (9% national plus 0.9% local), compared to the standard 15.4% financial income rate. Sources net gains against losses before applying this calculation.

The ₩20M annual contribution cap and ₩100M cumulative cap apply (as of May 2026, verify at FSC). The proposed raise to ₩40M annual has not passed the National Assembly.

Unused annual contribution capacity rolls over to the next year. If you contributed ₩10M in year one and ₩20M in year two, you can contribute up to ₩30M in year three, subject to the ₩100M cumulative ceiling.

Which type are you: 일반형 vs 서민형

Most foreign residents will open the general type (일반형). If your prior-year income is below the low-income threshold, the low-income type (서민형) is better: the tax-free limit doubles from ₩2M to ₩4M.

The income thresholds for 서민형

The income year measured is the prior calendar year. If you are enrolling in 2026, the NTS checks your 2025 income. Source: KB Think ISA 서민형 guide.

To enroll as 서민형, you need a specific document from the National Tax Service Hometax: an income verification certificate (소득확인증명서) issued for individual savings account enrollment purposes (개인종합자산관리계좌 가입용). Present this at the brokerage when opening. Switching from 일반형 to 서민형 after opening requires a branch visit, not an app. Switching from 서민형 to 일반형 is automatic if the NTS annual check finds your income exceeded the threshold.

If your income later exceeds the threshold, the NTS sends an ineligibility notice (부적격 통보) to your brokerage and the account converts to 일반형. The brokerage is required to inform you within 14 days of receiving the notice. If you believe the classification is wrong, you can file an objection (이의신청) at your local tax office; if the NTS confirms 서민형 eligibility on review, the account reverts to 서민형.

The third subtype, the farmer and fisherman type (농어민형), requires both qualifying income and a documented agricultural or fishery occupation. It is effectively unavailable to the typical foreign resident. The guide treats it as out-of-scope.

Three ISA account structures: which one to use

The subtype (일반형 vs 서민형) is about income qualification. The account structure is a separate choice about how the account is managed. There are three options. Source: KB Think ISA account types guide.

The brokerage type (중개형) is the account for most foreign residents who want to invest. It is the only structure that allows direct Korean stock and ETF investment, and it has no management fee. As of October 2024, 중개형 accounts held 54% of total ISA assets and 83% of all ISA accounts, per FNTIMES.

중개형 is offered only by securities brokerages, not banks. If you want direct stock exposure, you open a 중개형 at a brokerage.

The trust type (신탁형) is useful if you want bank deposit products wrapped inside the ISA's tax shelter. Banks distribute this type.

The discretionary type (일임형) is hands-off: the firm manages a model portfolio. Fees are higher and you give up control.

What you can actually hold inside a brokerage type ISA

The Korea Investment and Securities 중개형 ISA product page documents the allowed product list. What goes inside:

Allowed:

• Korean-listed stocks (국내상장 주식): direct stock investment added in the 2021 reform
• Korean-listed ETFs, including funds that track overseas indices (e.g., KODEX 미국S&P500, TIGER 나스닥100)
• Korean bonds (국내채권): most types; excludes private placement, convertibles, and certain structured products
• Derivative-linked securities (파생결합증권): ELS, ELB, DLS, DLB, ETN
• Korean-listed REITs (리츠)
• Repurchase agreements (RP)
• Cash held inside the account

Not allowed:

• Overseas-listed stocks directly (no Apple on NASDAQ, no SPY on NYSE)
• Overseas-listed ETFs (no Vanguard, no iShares via foreign exchanges)
• Bank savings deposits or fixed-term deposits (permitted in 신탁형 only, not 중개형)

Uncertain: Leveraged and inverse ETFs. Sources conflict on whether these are allowed inside a 중개형 ISA. Confirm directly with your chosen brokerage before investing in any leveraged or inverse product inside the account.

For foreign index exposure, the practical path is Korean-listed ETFs that track overseas indices. KODEX 미국S&P500 and TIGER 나스닥100 are two commonly used examples. These are Korean-exchange-listed products and fully permitted inside the ISA wrapper.

The 3-year clock: what it means and when it does not apply

The ISA requires a 3-year holding period (의무가입기간) before the tax benefits vest. The clock starts from the calendar year in which you open the account: an account opened at any point in 2024 counts 2024 as year one, 2025 as year two, and 2026 as year three. Tax-free treatment applies from the first day of 2027.

Note: the calendar-year counting mechanism is described consistently across brokerage sources but should be confirmed against the full text of 조세특례제한법 제91조의18 before publishing any decisions based on the exact start date.

What you can do before 3 years without penalty: Withdraw your original principal (납입원금). If you deposited ₩20M and the account has grown to ₩25M, you can withdraw up to ₩20M at any time. This does not restart the clock or trigger early termination. Note that withdrawn principal reduces your contribution room for the year it is withdrawn.

What you cannot do before 3 years without consequence: Withdraw gains. Gains stay inside the wrapper until maturity or termination.

If you close early (standard termination): All gains are re-taxed at the standard 15.4% financial income rate. The ₩2M / ₩4M tax-free floor and the 9.9% reduced rate do not apply. Any tax benefit previously applied to the account is clawed back (추징). There is no separate government fine; the cost is loss of the benefit, not a penalty layered on top of normal rates. Source: KB Kookmin Bank ISA early termination page.

Special early termination: when the 3-year clock is waived

Under 조세특례제한법 제91조의18 and its Enforcement Decree (시행령) 제93조의4 제12항, closing before 3 years for any of the following reasons is treated as if the account reached maturity. Full tax benefit is preserved.

Two causes are unconditional. The remaining five require the triggering event to have occurred within 6 months of the closure date.

For foreign residents planning to leave Korea, the overseas emigration (해외이주) cause is the relevant one. You close at a branch and present emigration documentation. The specific document required may vary by institution: confirm with your provider before your departure date. Research reviewed references a 해외이주신고 확인서, but the exact form should be verified directly with your brokerage.

Disability and terminal illness are not listed as standalone causes. Extended hospitalization or treatment lasting 3 or more months is the closest category and is likely to cover these situations.

The 3-year clock concern is real, but the overseas emigration exception means the ISA is worth opening even for foreign residents who are not certain how long they will stay in Korea.

Annual contributions: caps, carry-forward, and the proposed raise

The current annual cap is ₩20,000,000 (as of May 2026, per FSC ISA Q&A). The cumulative cap across all ISA accounts over your lifetime is ₩100,000,000.

Unused annual contribution capacity rolls forward. If you deposited only ₩5M in 2024, the unused ₩15M from that year adds to your 2025 capacity (to a combined ₩35M in that example), up to the ₩100M lifetime ceiling.

The proposed raise to ₩40M annual and ₩200M cumulative, announced by the FSC in January 2024, has not passed the National Assembly as of May 2026. The bill stalled during the political disruption in late 2024 and early 2025. Check the FSC announcements page before making contribution plans based on the proposed figures.

Opening an ISA as a foreign resident: provider notes

All providers require the same baseline documents: a valid Alien Registration Card (외국인등록증, ARC), your passport, a Korean postpaid mobile phone number, and a linked Korean bank account.

The table below reflects what was verifiable from available sources as of May 2026. Brokerage policies on foreign resident account opening change. Confirm directly with the provider before attempting online opening.

For a foreign resident who prefers to avoid a branch visit, the Toss app route (which enrolls through Korea Investment) is the most-cited online path in third-party guides; confirm the current ARC-holder flow with the provider before relying on it. For a branch path, Mirae Asset, Samsung, and Kiwoom are the most clearly documented options for foreign residents.

Transferring your ISA between providers

You can move your ISA from one provider to another without breaking the 3-year clock. The formal mechanism is an account transfer (계좌이전).

Initiate the transfer at the receiving institution, not the departing one. The receiving brokerage handles the request. The original opening date remains the clock start, and the remaining holding period continues unchanged. The transferred balance does not count as a new contribution against the annual ₩20M cap. Source: FSC ISA Q&A.

There is no confirmed limit on how many times you can transfer per year, but check with the receiving institution for any administrative waiting periods.

One useful application: if you opened a trust type (신탁형) at a bank and later want to switch to a brokerage type (중개형), you can do this via the transfer mechanism. The FSC guidance explicitly describes this as a valid use case.

Assets typically need to be liquidated to cash for the transfer. Whether in-kind transfer of specific securities between compatible brokerages is possible was not confirmed in available primary sources. Treat the default as liquidation.

One ISA at a time rule: you cannot hold two active ISA accounts simultaneously across different providers. The transfer system is the mechanism for moving a single active account.

The maturity play: ISA to pension within 60 days

This is the highest-value ISA move that most foreign residents miss.

When your ISA matures (after the 3-year minimum), you have three options: close and take the cash, extend the account to keep accumulating, or transfer the balance into a pension savings account (연금저축) or IRP.

The pension transfer generates an additional tax credit: 10% of the transferred amount, capped at ₩3,000,000 per year. To claim the maximum ₩3M credit, you must transfer at least ₩30M. Source: Mirae Asset ISA-to-pension transfer page.

The deadline is strict: the transfer must happen within 60 days of your ISA maturity date. The window runs from the original maturity date, not from the date you actually close the account. If the account continues past maturity before you close, the 60-day clock has already started running. After 60 days, the transfer is treated as a regular cash deposit with no extra credit.

The transferred amount does not count toward the standard ₩18M annual pension contribution cap. You can transfer the full ISA balance regardless of what you have already contributed to pension accounts that year.

The additional credit stacks on top of your regular pension account deductions. In theory, a worker who maximizes the ₩9M combined IRP and pension savings deduction and also transfers ₩30M from a matured ISA can claim up to ₩12M as a combined deduction cap, with the actual tax saving varying by income tier (the standard credit rate is 13.2% or 16.5%).

Important caveat for foreign workers on the 19% flat rate: the ISA-to-pension transfer credit is mechanically a contribution-side tax credit on pension contributions. Under the same forfeiture clause that zeros out IRP and 연금저축 credits for flat-rate filers, this transfer credit likely also goes to zero. The ISA's gain-side benefits (the ₩2M / ₩4M tax-free floor and 9.9% rate) remain intact regardless of the flat rate; the transfer credit does not. Confirm with a Korean tax accountant (세무사) before relying on this credit if you have elected the 19% flat rate.

After transferring, you can immediately open a new ISA. The new account starts a fresh 3-year clock and a fresh ₩20M annual and ₩100M cumulative limit. The prior account's contribution history does not carry over.

Leaving Korea: how to close your ISA cleanly

If you leave Korea with an ISA open, your options are:

Best outcome: close while still a 거주자 with 3+ years held. Normal tax-free treatment applies to gains within the exempt limit, and 9.9% on the rest. No penalties.

Leaving before 3 years: use the 해외이주 clause. Overseas emigration (해외이주) is a recognized special early termination reason. Present emigration documentation at your brokerage branch. The tax benefit is preserved in full and the account is treated as having reached maturity. Branch visit is typically required for this process. The specific documentation will vary by institution; confirm the requirements before your departure date.

Rough checklist for the branch visit:

• Valid ARC (외국인등록증)
• Passport
• Overseas emigration documentation (confirm the exact form required with your provider in advance)
• Departure details if requested

Do not let your ISA convert to a 비거주자-status account while you are still in Korea trying to close it. If you become a non-resident before closing, the tax-free exemption is lost and standard financial income tax rates apply to your gains. Close while you are still classified as a 거주자.

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FAQ

I'm on the 19% flat tax rate. Should I still open an ISA?

Yes. The flat-rate trap only eliminates tax credits on IRP and pension savings contributions. The ISA works differently: its benefit is a tax exemption or reduced flat tax on gains inside the wrapper, not a contribution credit. A foreign worker on the 19% flat rate can open an ISA and receive the full ₩2M or ₩4M tax-free gain exemption and the 9.9% rate on excess gains. This is one of the few tax-advantaged tools that the flat rate does not cancel.

Can I hold US stocks like Apple inside my ISA?

No. You cannot hold overseas-listed securities directly inside an ISA. The ISA wrapper is limited to Korean-listed products. However, you can gain exposure to overseas indices by holding Korean-listed ETFs that track foreign benchmarks, for example KODEX 미국S&P500 (tracks the S&P 500) or TIGER 나스닥100 (tracks the Nasdaq 100). These ETFs are listed on the Korean Stock Exchange and are fully permitted inside the ISA.

I might leave Korea in 18 months. Should I bother opening an ISA?

Probably yes. Overseas emigration (해외이주) is a legally recognized special early termination reason under 조세특례제한법 제91조의18. If you close your ISA under this clause before 3 years, the tax benefit is preserved in full: it is treated as if the account reached maturity. You do not lose your tax-free gains just because you leave before year 3. Bring overseas emigration documentation to your brokerage branch when you close.

What if my income later exceeds the 서민형 threshold?

The NTS verifies all low-income type (서민형) ISA holders annually. If your income in a prior year exceeded ₩50M employment income or ₩38M comprehensive income, the NTS issues an ineligibility notice (부적격 통보) to your brokerage and the account converts to the general type (일반형). The brokerage is required to inform you within 14 days of receiving the notice. If you believe the classification is wrong, you can file an objection (이의신청) at your local tax office. The difference in tax-free benefit between the two types for the period where you were incorrectly classified is subject to reclaim.

Can I have ISAs at two different providers at the same time?

No. You can only hold one ISA account at a time across all financial institutions. If you want to move your ISA from one provider to another, use the formal account transfer (계좌이전) mechanism. Initiating the transfer at the receiving institution moves your account without breaking the 3-year clock and without triggering early termination penalties.

What's the catch with the ISA-to-pension transfer?

The main conditions: the transfer must happen within 60 days of your ISA maturity date, and you need to transfer at least ₩30M to claim the maximum ₩3M additional tax credit. The window runs from the original maturity date, not from when you actually close the account. If you miss the 60-day window, the transfer counts as a regular pension deposit with no extra credit. The additional credit is independent of the flat-rate trap, though confirm the exact interaction with a Korean tax accountant (세무사) for your situation.

Will the ₩40M annual contribution cap pass this year?

Unknown. The government announced a proposal to raise the annual cap to ₩40M in January 2024. As of May 2026, the bill has not passed the National Assembly. It stalled during the political disruption in late 2024 and early 2025. The current cap remains ₩20M per year and ₩100M cumulative. Check the FSC announcements page for updates before making contribution decisions based on the proposed figures.

@misc{seoulstart-isa-foreign-residents-korea,
  author = {{Seoulstart Editorial Team}},
  title = {{ISA in Korea: A Foreign Resident's Guide to the Individual Savings Account}},
  year = {2026},
  publisher = {Seoulstart},
  url = {https://seoulstart.com/guides/isa-foreign-residents-korea},
  note = {Last updated May 25, 2026}
}