Taiwan corporate tax for a UK parent: profit-seeking enterprise tax, withholding and the double taxation agreement

How Taiwan taxes a foreign business

Taiwan taxes resident entities on their worldwide income. For non-resident entities, the approach is territorial: only profits that are Taiwan-source are taxable in Taiwan.

What counts as Taiwan-source profit depends on where the income is derived. For goods, it is typically where the sale occurs, the place of delivery or the location of the business activity. For services, it is where the service is performed or, in some cases, where the effect of the service is felt. The place where the customer sits does not settle the question.

This territorial principle applies whether the foreign company operates through a branch, a subsidiary or simply through contractual relationships. The income is taxable if it is Taiwan-sourced, regardless of how the business is structured.

Permanent establishment: the threshold that decides taxation

A permanent establishment is the concept that decides whether a non-resident foreign company is subject to Taiwan corporate tax at all. It can take two forms: a fixed place of business or a dependent agent.

A fixed place of business is typically an office, workshop, warehouse, building site, installation or comparable location where business activity is conducted. There is a minimum duration threshold below which a short visit does not qualify as a PE; the tax authority sets this threshold and it is worth confirming before sending staff to handle a specific project.

A dependent agent PE arises where an individual in Taiwan has authority to bind the foreign company in concluding business transactions and regularly exercises that authority. This is the rule that can catch a manager or distributor who enters into commitments on the company's behalf.

If a non-resident UK company has a PE in Taiwan, it is liable to Taiwan corporate tax on its Taiwan-source profits, even if the PE itself does not issue invoices or take payment locally. The presence of the PE is the trigger.

Corporate income tax on Taiwan-source profits

Any resident entity or non-resident with a permanent establishment in Taiwan must pay corporate income tax on Taiwan-source profits at the profit-seeking enterprise income tax rate. The National Taxation Bureau administers this tax.

The taxable profit is calculated as gross income minus ordinary business expenses, cost of goods sold and approved deductions. The tax authority has detailed guidance on what qualifies for deduction, and getting this right is usually where a local tax adviser earns their fee.

Tax returns are filed annually, and payment is due by a deadline set by the tax authority. Late payment incurs interest and penalties. A resident entity must maintain Taiwanese books and records.

Withholding tax on payments to non-residents

Taiwan applies withholding tax at source on certain payments made to a non-resident individual or company. The entity making the payment (the payer) is responsible for withholding and remitting the tax on time.

The payments caught by withholding include dividends on shares, interest on loans, royalties for intellectual property, technical service fees, management fees, rental income and insurance premiums paid to a non-resident. The withholding rate varies significantly by payment type and the treaty position of the recipient.

A payer who fails to withhold or remits late faces penalties and interest. For a subsidiary remitting dividends to a UK parent, the withholding at source is often the largest tax cost of the structure - which is why the branch versus subsidiary decision is settled on this point.

The double taxation agreement: how it works and how to claim

The UK-Taiwan agreement on the avoidance of double taxation allocates taxing rights between the two countries. Under the agreement, certain types of income are taxed only in the country of source or only in the country of residence. On other income, the rates of withholding are reduced from what Taiwan's domestic law would otherwise apply.

Treaty benefits are not received automatically. If a UK-resident company receives a payment from Taiwan - such as a dividend from a subsidiary, interest on a loan or a royalty - it must apply to the Taiwan tax authority for treaty relief and supply evidence that it qualifies. The required evidence is usually a certificate of residence issued by HMRC or a comparable UK authority showing the company is a resident of the United Kingdom for tax purposes.

The application process, the documentation required and the time it takes vary depending on the payment type, the nature of the payer and the income type. It is standard practice to apply before the payment is made, not after. The tax authority then issues a determination, often a ruling letter, confirming that the reduced rate applies.

Where a payment would be subject to withholding under Taiwan domestic law, always ask whether the recipient is treaty-eligible and what documentation is needed before the payment is made. Otherwise, the withholding is applied at the full rate, and recovery of an overpayment is a separate process.

Business tax and the uniform invoice system

Taiwan's value added tax is called business tax. It applies to most commercial sales of goods and services conducted in Taiwan. The rate is set by the tax authority and can vary by industry and product type; confirm the current rate for your activity.

The system runs on uniform invoices, a standardised invoice format that Taiwan's tax authority prescribes. Every supplier selling goods or services to a Taiwanese buyer is expected to issue a compliant uniform invoice. A Taiwanese customer is not able to account for a purchase in their own tax records without one.

For a UK company selling into Taiwan through a local importer, an overseas distributor or an agent, the question of who issues the uniform invoice (and who accounts for the business tax liability) depends on the contractual structure and the goods flow. It is straightforward where a Taiwanese subsidiary does the invoicing; it is more complex where an overseas parent invoices a local buyer directly.

Every supplier must register for business tax purposes before issuing invoices. The registration, the invoice format, numbering rules and filing deadlines are administered by the tax authority and are mandatory.

A note on professional advice and your specific position

This guide covers the broad framework that applies to a UK-owned business in Taiwan. A specific company's tax position depends on facts that no general guide can know: the entity's legal structure, the source and nature of its income, its permanent establishment status, the treaty position of its shareholders or payees, and its profit repatriation plans.

Before setting up a Taiwanese entity, before making a payment to a non-resident, before deciding whether to claim treaty benefits and before structuring a transaction with tax implications, seek professional advice from a Taiwanese tax adviser. The cost of an hour of advice is always cheaper than a compliance mistake that draws the tax authority's attention, and the tax authority's interest is not a hypothetical scenario in Taiwan.