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

An Individual Savings Account (개인종합자산관리계좌, ISA) is a Korean tax-advantaged investment account. Foreign residents can use it when they qualify as Korean tax residents and meet the same ISA conditions that apply to residents generally.

This is not a provider-ranking guide. Brokerage app access, branch requirements, product menus, and document checklists vary by institution and often come from commercial provider pages. Under Seoulstart's seal rule, this guide uses official law, NTS, and FSC sources for the load-bearing tax and eligibility facts. Confirm the operational flow with your chosen bank or brokerage before opening or closing an ISA.

For the wider account map, read the personal finance accounts guide.

The Eligibility Rule

The first question is not your visa code. It is whether you are a Korean tax resident (거주자).

The Income Tax Act defines a resident as an individual with an address in Korea or a place of residence in Korea for at least 183 days. Article 91-18 of the Restriction of Special Taxation Act then sets ISA eligibility for residents, including people aged 19 or older.

That means a foreign resident should treat ISA eligibility as a tax-residency question first. Your ARC and visa matter for brokerage onboarding, identity checks, and financial-institution compliance, but the tax benefit itself is built around resident status.

What The ISA Benefit Actually Is

The ISA tax benefit is gain-side treatment, not a contribution deduction.

Inside the ISA, gains and losses are netted. The Enforcement Decree describes this as subtracting losses from the relevant income amounts. For example, if one holding gains ₩5,000,000 and another loses ₩3,000,000, the taxable result is based on the net, not only the winning position.

After netting, Article 91-18 gives a tax-free amount:

Net gain above the tax-free amount is taxed at 9% national tax. Local income tax can apply on top, so consumer-facing materials often describe the combined burden as 9.9%.

Low-Income Type Thresholds

The low-income type (서민형) is better than the general type because it doubles the tax-free amount from ₩2,000,000 to ₩4,000,000.

Article 91-18 sets the income tests around the prior tax period. The main thresholds are:

Do not assume the brokerage will classify you correctly from the app screen alone. If you believe you qualify for 서민형, ask the provider what income-confirmation document it requires and whether the account will open as 서민형 immediately or be adjusted after verification.

The 19% Flat-Rate Question

Foreign workers who elect Korea's 19% flat income tax rate should be careful, but not for the same reason as IRP.

Article 18-2 says the flat-rate election disapplies ordinary income-tax exemptions, deductions, reductions, and tax credits for the covered wage income. That is why IRP and pension-savings contribution credits can disappear for flat-rate workers.

The ISA is different from an IRP contribution credit because Article 91-18 separately governs tax treatment on ISA net gains. That makes the ISA worth discussing even for flat-rate workers. The cautious rule is:

• Do not skip ISA automatically just because you use the flat rate.
• Do not assume pension-side credits from an ISA-to-pension transfer survive the flat-rate election.
• Ask a tax accountant (세무사) before counting any ISA-to-pension transfer credit in your year-end tax result.

Contribution Caps

The current statute uses a ₩20,000,000 annual formula and a ₩100,000,000 total cap.

The annual formula is based on ₩20,000,000 multiplied by elapsed years, with elapsed years capped at 4, minus cumulative contributions. In plain language, unused room can accumulate, but the total cap remains ₩100,000,000.

Example:

The FSC announced a proposal in January 2024 to raise the ISA allowance to ₩40,000,000 per year and ₩200,000,000 total. That is not the current statute. Until Article 91-18 changes, use the ₩20,000,000 formula and ₩100,000,000 total cap.

One ISA At A Time

Article 91-18 requires one ISA per person. If you want to move providers, use the institution's formal account-transfer process rather than opening a second active ISA and trying to reconcile it later.

This guide does not seal detailed provider-transfer workflows because those procedures live in financial-institution materials, not in the statute. Ask the receiving institution how it handles ISA transfer, liquidation, and product compatibility.

What You Can Hold

Article 91-18 lists broad eligible asset categories, including deposit-like products, certain collective investment securities, exchange-traded funds, real-estate investment company shares, derivative-linked securities or bonds, and repurchase agreements.

It also excludes foreign collective investment securities from the collective-investment category. For foreign index exposure, many investors use Korean-listed funds or ETFs, but the exact permitted product list depends on the ISA structure and provider menu. Confirm any specific stock, ETF, leveraged product, or foreign-exposure product with the brokerage before buying.

The 3-Year Rule

An ISA must have a contract period of at least 3 years.

Use the contract date, not the calendar year, as the clock. An ISA opened on June 1, 2026 reaches the 3-year point on June 1, 2029.

Before the 3-year point, the Enforcement Decree treats withdrawals as coming from principal first. That means principal withdrawal is possible, but withdrawn principal does not make the old contribution disappear from your cap history. If you withdraw more than the principal before 3 years, Article 91-18 treats that as early termination.

Special Early Termination

Early termination normally risks losing the ISA's tax benefit. The statute and Enforcement Decree list special reasons where closing before the 3-year point is treated differently.

The relevant reasons include:

For foreign residents leaving Korea, overseas emigration (해외이주) is the key item. Use the brokerage's special-termination process, confirm the exact supporting document before departure, and keep copies of what you submit.

ISA To Pension Transfer

At maturity, you can close the ISA, extend it if your provider supports extension, or transfer matured ISA funds into a pension account such as IRP or pension savings (연금저축).

The NTS pension guide says ISA maturity money paid into a pension account must be deposited within 60 days from the ISA maturity date. Article 59-3 then gives an additional pension-account credit base for ISA transfers: 10% of the transferred amount, capped at ₩3,000,000.

That is why ₩30,000,000 is the practical number people talk about. Ten percent of ₩30,000,000 is ₩3,000,000, which reaches the additional cap.

Two cautions matter:

• The 60-day window is tied to maturity, so ask the provider to confirm the maturity date before you close or transfer.
• For flat-rate foreign workers, the ISA transfer credit is pension-side tax-credit territory. Confirm before relying on it.

Leaving Korea

If you already passed 3 years, normal maturity treatment is the cleanest path.

If you leave before 3 years, ask your brokerage specifically about special early termination for overseas emigration (해외이주). Do this before your departure date, while you can still visit a branch or resolve identity checks in Korea.

Avoid relying on informal phone advice alone. Ask what document they require, whether the account must be liquidated first, how tax will be calculated, and when funds can be transferred out.

FAQ

Can foreign residents open an ISA?

Yes, if they are Korean tax residents and meet the same statutory conditions as Korean residents. The ISA rule is based on resident status, not visa category.

Does the 19% flat tax rate cancel ISA benefits?

Do not treat the ISA like an IRP credit. The flat-rate statute disapplies ordinary income-tax exemptions, deductions, reductions, and credits for the relevant wage income, while the ISA article separately governs gain-side ISA tax treatment. The safest reading is that the ISA wrapper may still be useful, but pension-side credits from an ISA transfer should be confirmed before relying on them.

Can I have two ISAs at once?

No. The ISA statute requires one account per person.

Can I withdraw money before 3 years?

You can withdraw principal. The Enforcement Decree treats a withdrawal as coming from principal first, but withdrawing more than principal before the 3-year point can be treated as early termination.

What happens if I leave Korea before 3 years?

Overseas emigration (해외이주) is listed as a special early-termination reason. Use the brokerage's formal special-termination process and confirm required documents before departure.

Is the ₩40M annual ISA cap already law?

No. The current statute still uses the ₩20M annual formula and ₩100M total cap. The FSC announced a ₩40M annual and ₩200M total proposal in January 2024, but treat that as a proposal unless the statute changes.

@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 June 5, 2026}
}