Introduction
On 26 August 2026, the Taipei National Taxation Bureau published a case that should be read carefully by every foreign company operating in Taiwan through a branch. A foreign branch claimed NT$107.5 million of allocated head office management expenses in its FY2023 corporate income tax return. The Bureau disallowed the entire amount and assessed additional tax of NT$21.5 million.
What makes this case instructive is what it was not about. The Bureau did not argue that the expenses were fabricated, that the services were never rendered, or that the allocation was commercially unreasonable. It disallowed the deduction because the branch could not produce the specific documents that Taiwan law requires. The costs were real. The deduction was lost anyway. For foreign groups accustomed to jurisdictions where a reasonable allocation policy and internal support are sufficient, Taiwan’s approach is materially stricter — and the failure mode is expensive.
💼 Impact on Foreign Businesses in Taiwan
The branch structure is chosen by many foreign groups in Taiwan for good reasons: no separate legal personality, no dividend withholding on profit repatriation, and simpler wind-down. But those advantages come with an evidentiary burden that sits outside Taiwan — in the head office’s finance function, in another time zone, and often outside the control of the Taiwan finance team.
The practical consequence is a timing problem. The Taiwan filing deadline for calendar-year companies is 31 May. A CPA certification from the head office jurisdiction, covering figures that the head office auditor does not ordinarily present separately, cannot be produced in April. Groups that have not engaged their head office auditor on this point well in advance are, in effect, filing an unsupported deduction and hoping it is not selected for review.
There is also a strategic dimension. Branches and subsidiaries fail in different ways. A subsidiary paying a service fee to its parent faces transfer pricing scrutiny — benefit test, arm’s length mark-up, and 20% withholding under Article 88. A branch allocating head office expenses faces Article 70 documentation. Neither is easier; they simply require different preparation. The choice is made at entry, and it is rarely revisited.
✅ LY CPA Observations
A NT$21.5 million assessment on expenses that were genuinely incurred is an expensive way to learn that Taiwan’s evidentiary standard for head office cost allocation is prescriptive rather than principles-based. The good news is that this is entirely fixable in advance.
If prior years are exposed, sequence matters. Article 48-1 of the Tax Collection Act allows a taxpayer who voluntarily files and pays, with interest, before the authority commences an investigation to be relieved of penalties entirely. Once a notice of inquiry or an audit assignment has issued, that door closes.
LY CPA is an international tax and cross-border transaction advisory firm in Taipei. We help foreign-invested branches and subsidiaries review their head office cost allocation methodology, define the certification scope for head office auditors, apply for approval of alternative allocation bases, and assess whether voluntary disclosure is appropriate for prior years.
If your Taiwan branch claims head office management expenses, we recommend a documentation review well before the next filing cycle.
📌 相關服務頁面 / Related LY CPA Services
・Tax Health Check → https://lytax.com.tw/eng-services/eng-tax-health-check/
・Domestic Tax Advisory → https://lytax.com.tw/eng-services/eng-domestic-tax-advisory/
