Photograph by RDNE Stock project on Pexels.
The Korean filing calendar, handled end to end: VAT returns, the corporate income tax return, withholding on payments to your parent, and the transfer pricing file that supports them.
Korea does not have a light-touch compliance calendar. A typical foreign-owned corporation deals with VAT four times a year, monthly withholding filings, an interim corporate tax return, an annual corporate tax return, the payroll year-end settlement, and — if it transacts with its parent — transfer pricing disclosure alongside the annual return.
None of these are individually difficult. The failure mode is not complexity; it is that a small Korean office with one finance person and a part-time bookkeeper simply runs out of calendar.
Korean VAT runs at a standard rate of 10 percent, with zero-rating for exports and exemption for certain categories of supply. The taxable year is split into two periods, each carrying a preliminary and a final return, which is why a corporation files quarterly.
Three things matter more than the mechanics:
The annual return is due within three months of the fiscal year end, with an interim return during the year. Because it is built on the finalised statutory accounts, the tax deadline is effectively a deadline on your year-end close.
For a foreign-owned subsidiary, the areas that most often need attention are:
| Area | Why it needs care |
|---|---|
| Deductibility of head-office charges | Management fees and cost recharges must be supported and arm’s length, or they are disallowed |
| Entertainment expenses | Korea limits and formalises deduction in ways foreign parents rarely expect |
| Interest on related-party loans | Thin capitalisation and arm’s-length interest rules both apply |
| Provisions and accruals | Book treatment and tax treatment diverge; the difference has to be tracked |
| Tax losses | Carry-forward is available but time-limited and conditional |
This is where we most often find recoverable money.
A Korean entity paying dividends, interest, royalties or certain service fees to a non-resident withholds Korean tax. Korea has an extensive treaty network, and many of those treaties reduce the applicable rate — but relief depends on the recipient’s residence being established and the documentation being in place before the payment is made.
Every foreign-owned subsidiary that recharges costs, pays a royalty, buys from its parent or provides services to the group has a transfer pricing position. The question is only whether it has been documented.
The proportionate approach for a small entity is not a full global master file. It is:
The last point is the one that fails most often: agreements drafted years ago describing a relationship that has since changed. An auditor reads the agreement, then the ledger, and asks why they differ.
Most of our clients have a group tax team who are competent and busy, and who need three things from Korea: the filings done on time, the numbers reconciled to group reporting, and early warning about anything that will show up in a group tax provision.
We report the Korean position in that form — what was filed, what the effective rate looks like, what is uncertain and what it might cost — rather than sending a Korean-language return and letting head office work it out.
Tax filings are drawn from the ledger maintained under accounting and bookkeeping; withholding on employment income runs through payroll. If you are still deciding on structure, the choice of entity type has direct tax consequences — see company registration in Korea.
The government portals behind this topic. Opens in a new tab.
Korea’s VAT year is split into two taxable periods, each with a preliminary and a final return — so a corporate taxpayer files four times a year, quarterly in practice. The standard VAT rate is 10 percent, with zero-rating for exports and exemption for certain supplies. The filings are frequent enough that VAT tends to be the rhythm a Korean finance calendar is built around, and late filing carries penalties. Individual businesses may file on a different cycle, which is one reason advice found online often does not match a corporation’s obligations.
Within three months of the end of the fiscal year, with an interim return during the year. For a company on a December year end that means an end-of-March deadline. Because the return draws on the finalised statutory accounts, the practical constraint is not the tax work but whether the books closed cleanly and, where an audit applies, whether it finished in time. Entities that leave the year-end close until February routinely find the tax deadline is the binding one.
Generally yes. Payments from a Korean entity to a non-resident — dividends, interest, royalties, and many service fees — are subject to Korean withholding tax at domestic rates, which a tax treaty may reduce where one applies and where the correct documentation is in place before payment. The order matters: treaty relief is claimed with supporting documentation, not assumed retrospectively. We see real money lost here, by companies who withheld at the full domestic rate for years while a treaty rate was available.
If your overseas company has activity in Korea that goes beyond preparatory or auxiliary work — people concluding contracts, a fixed place of business carrying on the core activity — Korea may treat it as a permanent establishment and tax the profits attributable to it, whether or not you registered anything. This most often bites companies operating through a liaison office that quietly started selling, or through employees working in Korea for a foreign parent. It is far cheaper to structure this deliberately than to argue about it later.
If it transacts with related parties abroad — and almost every foreign-owned subsidiary does, through service fees, cost recharges, royalties or goods — then it has a transfer pricing position whether or not it has documented it. Korea’s rules under the international tax adjustment legislation require related-party dealings to be at arm’s length, with documentation and disclosure obligations that scale with size and transaction volume. Small entities are not automatically exempt from the arm’s-length principle; they are sometimes exempt from the heavier filing requirements. Knowing which category you are in is the first question.
You want your Korean CPA involved from the first letter rather than the third. Practically, an NTS review starts with a document request, and how that request is answered shapes the rest. The common failure is a foreign parent answering directly, in English, with group-format numbers that do not tie to the Korean statutory filings — which turns a routine query into a broader examination. We handle NTS correspondence in Korean, from the statutory records, and translate what is actually happening for head office.
A December year-end Korean subsidiary files something in ten months out of twelve. Here is the whole calendar in one place, including the one annual filing that no longer exists and the one that becomes monthly in 2027.
Korean corporate tax tests client entertainment twice: first on how it was paid, then on how much of it there was. A foreign-owned subsidiary usually fails the first test on receipts and the second on a ceiling it assumed was three times higher.
A Korean subsidiary paying a dividend, interest or a royalty to its parent withholds 22% unless the parent's treaty documents are in the payer's hands before the payment. From 1 January 2026 holding them is no longer enough — the payer has to file them with the tax office too.
