A foreign headquarters decides to open a Korean subsidiary. The corporate registration is done, the bank account is open, and now someone has to decide how the first wire transfer from headquarters is actually booked: as paid-in capital, or as a loan to the new subsidiary. It looks like an accounting formality. It is not. The choice determines whether the company qualifies for foreign-investment status and a D-8 visa, how much Korean tax the group pays going forward, how easily headquarters can get the money back out, and how the Korean subsidiary’s balance sheet looks to auditors, landlords, and future lenders.
Most companies get this half right — they either put in too little in a form that gets no benefit, or they load up on shareholder debt without realizing Korea taxes it back the moment it crosses a specific ratio. This guide sets out how each method actually works, and why the right answer for most subsidiaries is a deliberate mix of both rather than a single choice.
- The short answer
- What equity capital actually buys you
- What a shareholder loan actually buys you
- A shareholder loan can also qualify as “foreign investment” — if you structure it correctly
- Comparing the two paths
- Why most subsidiaries end up using both
- Get the structure right before the first wire transfer
The short answer
There is no universal right answer, but there is a wrong instinct: treating this as an either/or decision. In practice, most well-structured Korean subsidiaries are funded with a base of equity capital large enough to secure foreign-investment status, plus a shareholder loan for the working capital layered on top — because equity and debt solve different problems, and Korean law rewards using both correctly rather than either one exclusively.
What equity capital actually buys you
Contributing headquarters funds as paid-in capital through a share subscription is the only way to obtain formal foreign-investment company status through equity, which in turn is what typically supports a D-8 investor visa application, eligibility for certain investment incentives, and a debt-free balance sheet that looks stronger to Korean banks, landlords, and potential local partners. To qualify, the investment generally needs to meet two thresholds under the Foreign Investment Promotion Act: at least KRW 100 million, and at least 10% of the company’s total issued shares (a lower stake can still qualify if the foreign investor sends a director or otherwise participates in management, but the two thresholds above are the standard route).
The cost of this route is flexibility. Money contributed as capital cannot simply be wired back to headquarters later — getting it out requires a dividend (which requires distributable profit and is subject to withholding tax), a formal capital reduction (a multi-step procedure involving a shareholders’ resolution, creditor notice period, and court/registry filings), or liquidation of the company altogether. None of these are quick, and none of them happen by default the way a loan repayment does.
What a shareholder loan actually buys you
Structuring the same funds as a loan from headquarters to the subsidiary is far more flexible on the way in and the way out: no share issuance, no registry filing, and principal can be repaid according to whatever schedule the loan agreement sets, without the procedural steps a capital reduction requires. It also lets the subsidiary deduct the interest it pays as a business expense, which equity dividends can never do, effectively giving the group a Korean tax shield on the financing cost.
That tax shield is exactly why Korea limits it. Under Korea’s thin-capitalization rule (Article 22 of the Act on International Tax Adjustment), once a subsidiary’s borrowing from a foreign controlling shareholder exceeds a set multiple of that shareholder’s equity contribution — two times for an ordinary business, six times for a financial business — the interest on the excess portion is disallowed as a deduction and is instead re-characterized as a dividend, meaning the subsidiary loses the tax deduction and the payment is taxed as if it had been paid out as profit in the first place. On top of the thin-cap test, the interest rate itself has to reflect an arm’s-length rate under Korea’s transfer-pricing rules — a related-party loan priced conspicuously above or below what an independent lender would charge invites exactly the kind of scrutiny that turns a routine intercompany loan into a tax audit.
There is also a separate foreign-exchange filing step that equity does not require in the same way: a Korean company borrowing directly from a non-resident, including its own foreign parent, generally has to report the loan to a foreign-exchange bank before drawing the funds, and larger borrowings can trigger additional Bank of Korea-level reporting. Miss this step and the loan itself can be challenged on foreign-exchange compliance grounds, independent of how it is treated for tax.
A shareholder loan can also qualify as “foreign investment” — if you structure it correctly
This is the detail most companies never learn until it is too late to use: a loan does not automatically fall outside the Foreign Investment Promotion Act’s definition of foreign investment. If the loan comes from the foreign parent or an existing foreign investor and has a maturity of five years or more, it can itself be registered as a qualifying long-term loan (장기차관) under the Act — with no minimum amount requirement — giving the subsidiary a second path to foreign-invested-company status that does not use up equity at all. Few companies structure their intercompany loans this way because it requires deciding on the five-year maturity and the lender’s status up front, but for a group that wants foreign-investment status without diluting the balance sheet with equity, it is often the more efficient route.
Comparing the two paths
| Equity capital | Shareholder loan | |
|---|---|---|
| Qualifies for foreign-investment status | Yes, at KRW 100 million and 10% of shares | Yes, if maturity is 5+ years and the lender is the foreign parent/investor — no minimum amount |
| Getting the money back to headquarters | Dividend, capital reduction, or liquidation — each a multi-step, sometimes multi-month process | Scheduled loan repayment under the loan agreement |
| Korean tax treatment | Dividends are not deductible to the subsidiary; withholding tax applies on distribution (domestic rate reduced under most tax treaties) | Interest is deductible to the subsidiary up to the thin-cap limit; withholding tax applies on interest paid out |
| Key restriction | None beyond the FDI thresholds themselves | Thin-capitalization limit (2x equity for ordinary businesses, 6x for financial businesses) and an arm’s-length interest rate requirement |
| Filing burden | Share subscription, capital registration, foreign-investment notification | Loan agreement, foreign-exchange bank reporting before drawdown, transfer-pricing documentation for the interest rate |
| Effect on balance sheet | Strengthens equity ratio — useful for local bank relationships, tenders, and licensing | Increases liabilities — can weaken debt ratios if overused |
Why most subsidiaries end up using both
A subsidiary funded entirely with equity is safe from thin-cap and transfer-pricing exposure, but every won it needs back has to go through a dividend or capital-reduction process, and the group gets no interest deduction anywhere. A subsidiary funded entirely with debt gets the interest deduction and easy repayment, but risks tripping the thin-cap ratio the moment operations need more working capital than the initial equity would support as a multiple, and a debt-heavy balance sheet can work against the company when it applies for local financing or certain licenses. The combination most practitioners land on is: contribute the minimum equity needed to clear the foreign-investment threshold (or use a five-year-plus loan structured to qualify instead, if diluting the balance sheet with equity is undesirable), and fund ongoing working-capital needs through a properly documented, arm’s-length shareholder loan kept inside the thin-cap ratio — leaving room to increase equity later if the loan balance grows close to the limit.
Get the structure right before the first wire transfer
Once headquarters funds arrive and are booked one way, reclassifying them later is far more complicated than choosing correctly at the outset — converting a loan to equity or vice versa involves its own filings, valuation questions, and potential tax consequences. Before the first transfer goes out, it is worth confirming the target foreign-investment structure, the loan’s maturity and interest rate against the thin-cap ceiling, and the foreign-exchange reporting that needs to happen before, not after, the funds are drawn.