Thailand IBC vs Regional Headquarters: Functions, Incentives, and Substance

Compare the function, legal form and outcome

A group may call its Bangkok team a regional headquarters because it coordinates strategy, procurement, marketing or finance across countries. That description alone does not establish its legal form, permission to operate, or entitlement to a special tax rate. A Thai subsidiary, a foreign company’s office and a business with a historical tax approval can all be described in commercial language as a headquarters.

The legal entity, the activity and the approval must be tested separately. A foreign company’s regional office is part of that foreign company, whereas Revenue Department IBC approval requires a company incorporated under Thai law. A Thai company can perform regional functions without claiming IBC tax relief, subject to the ordinary rules and any other permissions that apply.

The historical Revenue Department ROH decree describes a Thai-company headquarters providing qualifying services. By contrast, the Ministry of Foreign Affairs’ historical business handbook describes the foreign-company regional office as a different arrangement funded by its head office and restricted from deriving income. The handbook is old, so use it to identify the distinction rather than as a current filing checklist; confirm today’s exact scope with DBD before operating.

Match the work to the route

BOI identifies IBC services including business planning, procurement, product research, technical support, marketing, human resources, financial advice and treasury-center management. Its activity 7.34 is principally an affiliated-enterprise service activity. Services in the specified core categories must reach affiliated enterprises in at least one foreign country; services may also be provided to affiliates in Thailand. See the BOI scope and conditions .

Start with a service schedule: name each recipient, location, work product, contracting party and charging method. A Thai company that signs a management-services agreement and earns a fee presents a different operating and tax profile from a foreign office coordinating its parent’s group without service income. A business called “regional headquarters” can earn revenue if its actual legal form, activities and permissions allow it; the label alone does not settle the question.

The BOI definition of affiliated enterprises covers specified direct or indirect shareholdings of at least 25% and specified control relationships. Document the actual chain and control basis for each recipient. A group chart alone is a useful starting point, but it should agree with share registers, agreements and the applicant’s service plan. The Revenue Department’s IBC overview illustrates associated-enterprise relationships for tax purposes; check the applicable definition under each scheme.

An IBC project may also involve international trade, but trading alone is not a BOI IBC project . BOI requires meaningful involvement of a core headquarters service. Its headquarters FAQ says trade may be with non-affiliates and domestic trading within the promoted activity is wholesale rather than retail to end users. Trade outside the project or additional regulated activities need their own legal review.

Compare the incentives on the income that earns them

BOI promotion and Revenue Department IBC tax relief serve different purposes. The BOI guidance describes non-tax privileges, which may include majority foreign ownership and facilitation for qualifying foreign experts, plus a limited machinery-duty benefit for research, development and training equipment. Rights depend on the certificate and applicable conditions; they do not automatically confer a visa, work permit or permission for every business line.

The IBC Royal Decree No. 674 gives qualifying IBCs a framework for reduced corporate income tax on eligible net profit. For ordinary cases, the rate is 8% with at least THB 60 million of qualifying IBC expenses paid to recipients in Thailand in the accounting period, 5% at THB 300 million and 3% at THB 600 million. These are expenditure thresholds, not revenue or investment targets. The decree’s framework covers 15 accounting periods, with the first period determined by the approval timing and continuing conditions.

The Revenue Department’s income guidance makes the trade distinction explicit. Its decree also provides, subject to conditions, an exemption for dividends received from associated enterprises and a specific business tax exemption for qualifying financial-management service income. These are separate rules, not a blanket exemption for every transaction. Other income follows its applicable general corporate tax treatment or any separately established incentive.

Keep a separate income and expenditure trail. The official IBC FAQ excludes international-trading expenses from the IBC expenditure test and says inseparable shared IBC and non-IBC expenses are allocated based on revenue. Model the expense test every accounting period, not just at application, and check the classification of payments before relying on a projected rate.

Substance: what must exist and what proves it

For Revenue Department approval, the decree requires a Thai-incorporated company, at least THB 10 million paid-up capital on the last day of each accounting period, and at least ten full-time employees with the necessary IBC knowledge and skills. A financial-management-only IBC may have at least five. It must conduct qualifying services and meet the relevant annual expenditure and other conditions. The decree’s sections 10–13 supply the governing test.

BOI similarly describes at least ten permanent skilled IBC personnel, or five where the project only provides treasury-center financial management to affiliates. BOI also states a minimum project investment of THB 1 million excluding land and working capital, subject to its project rules. Its staff review considers education, position and job description; a nominal headcount without evidence of work will not answer that inquiry. See BOI personnel guidance and the project investment FAQ .

Physical presence should follow the work: a usable office, staff able to perform the services, management and operational records, and an accountable local team. The specific legal tests are those of the relevant approval; an office lease alone does not prove that services were delivered or that expenses qualify. For a general regional headquarters there is no single universal IBC headcount or expenditure test merely because of its name, although its own legal form, licences and contracts can impose requirements.

A practical evidence set

• Entity and authority: company registration, paid-up capital records, approved business objectives, ownership chart and relevant certificates.
• Activities and recipients: service agreements, affiliate ownership or control evidence, recipient locations, work plans, deliverables and invoices.
• People and premises: employment contracts, job descriptions, payroll records, office evidence and records showing who actually performed the work.
• Tax and spending: ledgers separating service and trading income, Thai-recipient invoices, payment evidence and a documented shared-cost allocation.
• Ongoing conditions: the approval letters, reporting calendar, annual calculation and a record of changes or authority correspondence.

If an ordinary IBC fails a section 13 qualification, the decree suspends the specified benefits for that accounting period. Section 15 also allows termination and retrospective revocation in specified circumstances. Investigate a shortfall promptly; do not assume it is cured by a later year or that every issue has the same consequence. Keep the supporting computation alongside each return and discuss material changes with the Revenue Department.

Separate the authorities and the completion evidence

First establish the vehicle and its business objects. For a new Thai company, the Thailand company formation guide covers the underlying incorporation task. Incorporation provides a legal vehicle; it does not itself award IBC incentives or authorise every restricted activity. If using a foreign company instead, identify the office’s scope and the parent’s liability. BOI’s branch guidance explains that a branch is part of the foreign corporation and may need registrations or permissions depending on its operations.

For BOI promotion, submit the appropriate project application describing services, recipients, staffing and investment; the BOI application procedure explains the review and certificate process. The applicant should respond to requests for clarification, accept applicable conditions and obtain the promotion certificate before treating a promoted right as established. BOI also requires project progress and annual performance reporting through e-Monitoring . Record the scope on the actual certificate, not just the application.

For tax benefits, file separately with the Revenue Department. The IBC application page provides form Sor.Gor.Ror.1 and supporting electronic schemas; the decree requires a business plan showing regional or global intent and a list of associated enterprises. Prepare the prescribed supporting details, arrange authorised signing or submission as required, answer any requests for correction and retain the Director-General’s approval and conditions. Plan around the complete application and agency review, not a guaranteed start date.

For a foreign business under the Foreign Business Act, check each service and trading activity with DBD. A restricted activity may need a Foreign Business Licence (FBL) unless an applicable exemption or other route applies. A BOI-promoted foreign business can seek a Foreign Business Certificate (FBC) under section 12 for the promoted scope; the DBD certificate manual addresses that route. An FBC is evidence of the applicable promoted authorisation, not a substitute for licences outside its scope.

If the plan includes treasury-center activity, consult the Bank of Thailand on exchange-control licensing and the scope of permitted transactions. The BOI headquarters FAQ requires proof of a treasury-centre licence application for BOI treasury promotion and the licence before the BOI certificate is issued. Other lending or financial activities may require different permissions. Banking, immigration and employment decisions are separate and should be planned on their own evidence.

How to assess existing ROH and IHQ rights

The Revenue Department’s ROH and IHQ were specific tax regimes, not generic descriptions of a regional team. Decree No. 674, sections 16–18 sets out conditional conversion provisions for identified ROH and IHQ categories seeking IBC approval, including different expenditure conditions for different categories. A conversion requires an application and approval; it is not automatic.

On the promotion side, BOI’s IBC FAQ says IHQ and international trading center promotion was repealed and describes how existing promoted projects may assess a change. That statement concerns BOI promotion; it does not itself determine the present status of an individual company’s historical Revenue Department tax rights. Confirm the actual regime, effective dates, amendments, conditions and any conversion or revocation with the authorities. This comparison does not assert that a new ROH or IHQ tax application is currently available, or that a particular old benefit survives.

For an existing structure, assemble the original applications, promotion certificate, tax approval, amendments and annual compliance records. Compare the benefits actually remaining under those documents with the proposed IBC service mix and expense forecast. Conversion may change conditions and should be assessed before submitting an application; a name change or corporate restructuring alone does not establish eligibility.

Choose the route using the evidence you can sustain

Choose a foreign-company regional-office analysis when the mandate is limited coordination for the overseas group and the team can operate inside the confirmed office scope without assuming service revenue. If the plan includes contracting, billing, trade or services outside that scope, map the relevant branch or Thai-company permissions before beginning those activities.

Consider a Thai-company IBC when the group needs substantial qualifying services, can demonstrate the necessary affiliate relationships and staff, and can sustain the separate BOI and tax conditions relevant to the benefits sought. Compare the cost and administration of that evidence against the value of the eligible income, rather than applying a reduced rate to the entire forecast.

A complete decision requires both an operating model and an approval map. For a general headquarters without IBC approval, use the applicable ordinary tax and licensing rules and evaluate any other incentive independently. For an existing ROH or IHQ, have the actual legacy documents and current rules reviewed before deciding whether to retain, amend or seek conversion. Revisit the decision when service recipients, staffing, transaction types or expenditure change.