If your Korean subsidiary buys from, sells to, lends to, or pays fees to a foreign affiliate, those transactions fall under Korea's transfer-pricing rules. The core principle is simple to state and hard to satisfy: related parties must deal with each other on the same terms that independent parties would, and you must be able to prove it.
The arm's-length principle and where it bites
Korea's international tax framework, principally the Adjustment of International Taxes Act, requires that prices in cross-border related-party transactions reflect arm's-length terms. Where the tax authority concludes that intercompany pricing shifted profit out of Korea, it can adjust the Korean company's taxable income upward, resulting in additional tax, penalties, and interest.
The transactions most often scrutinized are intercompany sales of goods, management and service fees, royalties for the use of intellectual property, and intra-group loans. Each must be supported by an analysis showing why the price is consistent with what unrelated parties would have agreed.
Documentation and dispute prevention
Korean rules require taxpayers above certain thresholds to prepare and keep contemporaneous transfer-pricing documentation, broadly aligned with international master-file and local-file concepts, and to disclose related-party transactions in their filings. Having this documentation ready before an audit is critical; producing it for the first time under examination is far weaker.
For groups that want certainty, Korea offers advance pricing arrangements (APAs), in which the tax authority agrees the pricing methodology in advance, sometimes bilaterally with another country's authority. An APA is resource-intensive but can remove years of audit uncertainty, and a bilateral APA has the added benefit of reducing the risk that the same profit is taxed in both countries.
Where a transfer-pricing adjustment has already been made in Korea or abroad, the resulting double taxation can sometimes be relieved through the mutual agreement procedure under the relevant tax treaty, in which the two tax authorities negotiate a consistent outcome. This is a slower route than an APA but an important safety valve when an adjustment has been imposed.
What foreign groups should do
Identify every related-party flow, choose a defensible pricing method for each, and benchmark it against comparable independent transactions. Document the analysis in the year the transactions occur, not retrospectively. Keep intercompany agreements consistent with how the business actually operates, because mismatches between contracts and conduct are a frequent audit trigger.
Common pitfalls
Foreign parents often set a fixed markup or royalty rate by habit, without local benchmarking, or charge management fees that the Korean entity cannot show it actually benefited from. Both invite adjustment. Loans on non-commercial terms and abrupt year-end pricing adjustments to hit a target margin are also red flags.
Transfer pricing rewards preparation and punishes improvisation. If your group has cross-border related-party dealings touching Korea, we can help you design defensible pricing, prepare the required documentation, and, where it makes sense, pursue an advance pricing arrangement.