Avoidance of Double Taxation Agreements: Treaty Rules, MAP and Arbitration (Third Edition, 2021)

Historical edition and scope

This article explains the third edition of IRAS’ Avoidance of Double Taxation Agreements guide, published on 23 October 2021. It is a historical source, separate from the fourth edition; its treaty descriptions, procedures and contact details are presented in their 2021 context. The first edition was published on 11 October 2017 and the second on 15 June 2018.

The guide addresses cross-border transactions and investments involving Singapore and a treaty partner. It explains how IRAS interprets common treaty provisions and how taxpayers may seek a mutual agreement procedure (MAP) or, where available, arbitration. The particular treaty and its effective amendments determine the result in an actual case. Most recent Singapore treaties broadly follow the OECD Model Tax Convention, with negotiated differences. OECD commentary generally assists interpretation, but Singapore’s positions and the actual wording matter; the OECD Model’s section on non-OECD economies’ positions records the main differences; the other jurisdiction may interpret provisions differently. Treaty relief generally requires a certificate of residence.

Why double taxation arises

Jurisdictions may differ in how they define income, identify its source, determine residence and non-resident liability, compute the tax base, apply deeming rules and recognise income timing. Rates, incentives, evidence requirements and appeal procedures can also differ. Juridical double taxation occurs when the same income of a taxpayer is taxed in both the source and residence jurisdictions. Economic double taxation can arise, for example, where one jurisdiction includes income while the other does not allow the corresponding expense deduction.

Domestic relief may not fully eliminate these mismatches. DTAs coordinate taxation, reduce uncertainty and the cost of cross-border activity, and provide recognised standards for cooperation. Comprehensive DTAs cover all types of income; limited treaties may cover only shipping and air transport. Treaty texts, rather than a general description, establish the applicable scope.

Singapore’s treaty policy and anti-abuse boundary

Singapore seeks certainty and transparency for cross-border business, relief from double taxation, and a basis for dialogue with partner authorities. A treaty is binding and must be applied in good faith, including agreed departures from domestic tax treatment. Information exchange and dispute resolution are also important aspects of cooperation.

Treaties are not intended to confer benefits on artificial arrangements without genuine commercial substance. Their purpose is to remove double taxation without facilitating non-taxation or reduced taxation through evasion or avoidance. A transaction’s treaty result therefore cannot be evaluated solely by locating a favourable rate.

How the Multilateral Instrument modifies treaties

Singapore signed the Multilateral Instrument (MLI) on 7 June 2017 to implement treaty-related measures from the G20/OECD BEPS project. The MLI includes mandatory provisions and optional provisions subject to reservations. A bilateral treaty is modified only where both partners select it for coverage, and only to the extent their positions match. Modifications take effect after both partners ratify the instrument in accordance with their domestic procedures and the applicable effective-date rules; not every Singapore DTA is modified.

The principal changes described in this edition are an anti-abuse preamble, a principal purpose test (PPT), and, in some treaties, arbitration for MAP issues unresolved after a specified period. Specific textual modifications are published through subsidiary legislation under the Income Tax Act and on IRAS’ website. Signing the MLI alone does not establish that a particular change already applies to a transaction.

Reading the allocation of taxing rights

A DTA can give one jurisdiction exclusive taxing rights, give both rights while capping the source-state tax, or allow both to tax without a source-state cap. In the latter two situations, the residence jurisdiction provides the treaty-prescribed relief for source-state tax. Wording that income is taxable only in one jurisdiction differs from wording permitting taxation in both.

The source jurisdiction may limit rights available under domestic law, for example to attract investment. A treaty generally does not limit a jurisdiction’s taxation of its own residents in the same way, but obliges it to relieve double taxation resulting from tax imposed consistently with the treaty. The following income classifications are general explanations, not interchangeable rules for every DTA.

Persons covered and transparent entities

Singapore’s DTAs generally cover residents of Singapore and the treaty partner; a person resident in neither cannot obtain their treaty treatment. A Singapore LLP or LP is fiscally transparent and is not itself a Singapore tax resident. Its partners may qualify if they meet Singapore’s residence criteria. A Singapore trust likewise has no residence status of its own; the trustee, being the person liable for the trust’s income tax, may qualify where the residence requirements are met.

Covered taxes and treaty definitions

The taxes-covered article concerns taxes on income and capital. In Singapore’s case the relevant covered tax is income tax; GST, customs duties and excise duties fall outside these DTAs. Identical or substantially similar taxes introduced after signature may also be covered. A taxpayer encountering an unlisted comparable foreign tax can seek IRAS clarification.

Treaties define commonly used terms. Unless the context requires otherwise, an undefined term normally takes its meaning under the relevant jurisdiction’s tax law at the time the treaty is applied, for the taxes concerned.

Residence and individual tie-breakers

Treaty residence generally requires liability to tax under domestic law because of domicile, residence, place of management or a comparable criterion. Singapore residence is defined in section 2 of the Income Tax Act. Residence qualification and certificate procedures must be considered before claiming benefits.

Where an individual is resident in both jurisdictions under domestic rules, the usual treaty tie-breakers are considered in sequence: an available permanent home, closer personal and economic relations, habitual abode, and nationality. If these do not resolve the question, the competent authorities generally settle residence by mutual agreement.

Dual residence of entities

For non-individuals, the third edition describes the usual tie-breaker as the place of effective management: where the key management and commercial decisions necessary for the business as a whole are substantively made. This generally corresponds to Singapore’s company residence test based on central management and control. Some treaties permit competent-authority discussion where the place cannot be determined. The actual treaty wording remains essential; the guide’s general description does not replace a differently drafted residence article.

Permanent establishments: presence, activities and exclusions

A permanent establishment (PE) is generally a fixed place through which an enterprise conducts all or part of its business, such as a management office, branch, office, factory, workshop or natural-resource extraction site. Treaties can also create a PE through construction, assembly, installation or related supervision exceeding a specified duration, services including consultancy continuing beyond a treaty threshold, or a dependent agent habitually exercising authority to negotiate and conclude contracts.

Specific exclusions may cover facilities used solely for storage, display or delivery and activities of a preparatory or auxiliary character, alone or in combination. Each exclusion and duration must be checked against the relevant treaty. A PE establishes a sufficient business connection for the source jurisdiction to tax attributable business profits; profits not attributable to it generally remain taxable only in the residence jurisdiction.

Immovable property and business profits

Income from immovable property, including real-estate rent, is usually taxable where the property is situated and in the recipient’s residence jurisdiction, with residence-state relief. The property definition generally refers to the domestic law of the relevant jurisdiction.

Business profits are generally not taxable in the source jurisdiction without a PE there. Where a PE exists, it is treated as an independent enterprise for attributing arm’s-length profits. Expenses reasonably attributable to it may be deducted, subject to source-state deduction rules. The PE does not automatically give the source jurisdiction a right to tax every profit of the enterprise.

Older service-income exclusions and the Australia agreement

Some older DTAs exclude management or personal-service income from the definition of enterprise profits. The third edition identifies Australia, Pakistan, Sweden and Taiwan as examples. Such income must be tested under other articles; the Pakistan treaty, for example, may require consideration of article 13 on technical-service fees, article 15 on personal services or article 22 on other income.

The guide records a Singapore–Australia mutual agreement effective from 1 May 2018. The article 2(1)(k)(iii) enterprise-profit exclusion applies only to income within article 11. An individual’s personal or professional services, whether performed personally or by employees, fall under article 11(1), allowing taxation where performed. A non-individual providing services through employees or other personnel instead has enterprise profits under articles 4 and 5, taxable in the other state only if the services create a PE under article 4. Employee remuneration is governed by article 12(1). These are specific treaty interpretations, not a general rule for all service contracts.

Shipping, aviation and leasing distinctions

The shipping and air-transport article generally grants full or partial source-state exemption for profits of a resident operator from ships or aircraft in international traffic, including connected activities specifically covered by the treaty. Singapore does not generally extend it to ancillary activities unless expressly included.

Bareboat leasing of ships or aircraft normally falls outside this article unless the treaty specifically covers it. Leasing fully equipped, crewed and supplied ships or aircraft is covered by the article as described in the guide. Classification therefore depends on both the operating arrangement and the treaty text.

Associated enterprises and corresponding adjustments

Related enterprises must transact at arm’s length. If one jurisdiction substitutes an arm’s-length price and adjusts taxable profits, the other is obliged to make a corresponding adjustment where it agrees the initial adjustment is justified. The authorities may consult to resolve resulting economic double taxation.

Even where a Singapore treaty omits a provision equivalent to OECD Model article 9(2), IRAS will accept a request for competent-authority assistance under its MAP article. The foreign authority must also accept the request. Transfer-pricing cases are addressed further in IRAS’ separate Transfer Pricing Guidelines; the detailed MAP process in this DTA guide is directed at non-transfer-pricing matters.

Dividends and interest

For treaty purposes, dividends generally arise where the paying company is resident. Source-state tax is typically capped by the treaty and collected through withholding. Some treaties exempt dividends paid to specified recipients or under specified arrangements.

Interest generally arises where the payer is resident, or where a PE or fixed base bears the interest. The treaty normally limits source-state withholding tax, with possible exemptions for banks, financial institutions or other specified recipients and arrangements. The treaty’s interest definition matters: derivative-contract payments are not generally interest, and may fall under business profits or other income according to the facts. This guide does not prescribe a single dividend or interest rate across all DTAs.

Royalties and technical-service fees

Royalties generally arise where the payer is resident or where a PE or fixed base bears the payment. Source-state withholding is usually limited by the treaty. Some definitions include payments for using industrial, commercial or scientific equipment, and some provide exemptions for specified parties or arrangements.

Certain DTAs separately allow source-state withholding on technical-service fees at a capped rate, typically excluding services provided through a local PE from that withholding provision. The definition and taxing scope vary. Singapore generally does not propose gross-fee withholding provisions because they ignore service costs and can produce excessive taxation, but businesses operating under a treaty that contains them must account for that cost.

Capital gains and independent professional services

The capital-gains article allocates rights over disposals such as property and shares. Gains on immovable property and business property may generally be taxed where the property is located. Share gains are generally reserved to residence-state taxation, subject to treaty exceptions.

An individual’s independent professional services may be taxable in the source jurisdiction when performed through a fixed base there or for more than the treaty’s specified duration. A fixed base resembles a PE. Duration thresholds commonly align with the treaty’s enterprise-services PE threshold. Examples include physicians, lawyers, engineers, architects, dentists and accountants. The gain or service must first be classified under the actual treaty before applying its conditions.

Employment income and the short-stay exemption

Employment income is generally taxable where employment is exercised, apart from separate categories such as pensions, directors’ fees and government remuneration. The short-stay exemption described in this edition requires all three conditions: work in the source state for less than the specified period, typically 183 days in any 12-month period; an employer that is not resident there; and remuneration not paid or borne by the employer’s PE or fixed base there. When all apply, taxation is reserved to the employee’s residence state. A short stay alone is insufficient, and the treaty’s precise day-count wording controls.

Pensions, government service and other personal categories

Pension articles may give exclusive rights to the residence jurisdiction or allow both residence and source taxation. Some Singapore treaties reserve pensions under a jurisdiction’s social-security system to that jurisdiction alone.

Government employees working abroad can obtain exemption in the host jurisdiction for remuneration from their government, subject to treaty conditions. However, remuneration is taxable only in the host jurisdiction if the employee is resident there and either is its national or did not become resident solely to perform government duties. A government-owned employer carrying on business does not receive this government-service treatment; ordinary employment provisions apply. Separate articles commonly address directors’ fees, entertainers, sportspersons, students and business apprentices.

Other income and treaty-specific REIT treatment

The other-income article covers income not addressed elsewhere. Depending on the treaty, taxing rights may lie with the source or residence jurisdiction, subject to exceptions. REIT distributions and Supplementary Retirement Scheme withdrawals are examples requiring attention unless already classified under another article.

The third edition notes that the Singapore treaties with Spain, the United Kingdom and Russia specifically address REIT distributions under dividends; the Russia reference is to the protocol signed on 17 November 2015. The Germany treaty’s dividend article covers investment-trust distributions, encompassing REITs. These examples show why an income label alone does not establish its treaty treatment.

Limitation of relief and Singapore-source business income

Some older or renegotiated treaties contain a limitation-of-relief (LOR) clause restricting benefits for a Singapore resident to foreign-source income received in Singapore. The guide describes Singapore’s policy preference to remove these provisions, because mandatory repatriation can discourage commercially sensible investment. That policy preference does not itself remove a clause still present in a treaty.

An LOR clause applies only to income considered foreign-sourced under Singapore law. Income from a business carried on in Singapore is Singapore-sourced even if paid by an overseas person or for work performed abroad. Such business income is not taxed only when remitted, so the described LOR does not apply to it.

Tax credits, underlying credits and exemption

The residence state must relieve double taxation caused by source-state tax imposed in accordance with the DTA, commonly through a credit or exemption. Singapore’s treaties typically require foreign-tax credits and, for dividends where provided, underlying credits for tax on the paying company’s profits from which the dividend is distributed.

Singapore residents may receive treaty credits whether Singapore regards the taxed income as local- or foreign-sourced, provided the foreign tax complies with the DTA. Foreign-source income exemption under the Income Tax Act is an alternative where its conditions are met. A non-resident’s Singapore PE, such as a branch, cannot claim these Singapore resident credits; relief may instead be available in the taxpayer’s residence jurisdiction.

Information exchange and the principal purpose test

Treaty information-exchange provisions facilitate cooperation for tax purposes and are generally not confined to the treaty’s covered persons or taxes.

The PPT can deny benefits where an objective assessment reasonably concludes that obtaining benefits inconsistently with the object and purpose of the relevant treaty provisions was a principal purpose, or one of the principal purposes, of an arrangement. All surrounding facts, objectives and participants must be considered; the effect of obtaining a benefit alone is not the whole test. For an arrangement connected with a core commercial activity whose form is not contrived, the guide states it would not be reasonable to conclude that one principal purpose was obtaining a treaty benefit.

What MAP resolves and who may apply

MAP enables IRAS and a foreign competent authority to resolve inconsistent treaty applications; a multilateral MAP can involve three or more authorities. An agreed result becomes binding on the relevant parties when accepted by the taxpayer. Singapore residents may seek IRAS assistance; a non-resident with a Singapore branch applies through the authority of its residence jurisdiction that has a Singapore DTA.

For example, a foreign resident company seeks MAP from its own authority for its Singapore branch, while the branch alerts IRAS. Conversely, a Singapore resident company applies to IRAS about its overseas branch in a treaty jurisdiction. The taxpayer can pursue domestic legal remedies and/or MAP. Transfer-pricing disputes should also consult the separate Transfer Pricing Guidelines.

MAP timing and readiness

Apply when treaty-inconsistent taxation has occurred or is almost certain, not merely because an audit might lead to double taxation. Recurring issues across years can be included subject to the treaty’s deadlines. Initiation must be within its MAP limit, for example three years, counted under its particular wording from the assessment notice or an official withholding-tax demand where no assessment is issued. Missing the limit can lead to rejection.

Before applying, assess whether double taxation is certain or highly probable for the years concerned, whether evidence and treaty analysis are robust, and whether resources and the cost-benefit case support the process. IRAS applies its best efforts to reach timely resolution, but complexity affects duration and agreement is not guaranteed.

Taxpayer cooperation and negotiation limits

Negotiations take place between authorities. Taxpayers neither participate nor observe unless asked to clarify matters. They must act in good faith, comply with application requirements, provide all relevant records and reliable analysis, meet information deadlines, promptly update IRAS about exchanges with the foreign authority, and give both authorities the same information.

Failure can cause rejection, discontinuation or a failure to agree, leaving domestic remedies as the remaining route. Domestic law or a final appeal or court decision may prevent adjustment even with cooperation. A taxpayer that has accepted a foreign tax settlement can still access MAP, but negotiating a departure from that settlement may be difficult.

Domestic proceedings, withdrawal and acceptance

MAP does not remove domestic remedies. If legal or judicial proceedings adjudicate the matter while MAP continues, inform both authorities so they can decide whether to continue, suspend or cease negotiations. IRAS is unlikely to depart from a Singapore tribunal or court determination.

Taxpayers may withdraw, terminate the process or reject an agreed outcome. Because the process consumes substantial taxpayer and authority resources, termination should have valid reasons. A taxpayer’s ability to reject the result is distinct from the authorities’ obligation to negotiate in good faith.

Discontinuation, resumption and cancellation

The guide gives two concrete discontinuation examples. If required information is still missing three months after the agreed deadline, IRAS treats the taxpayer as having withdrawn. If the taxpayer fails to disclose material information that could affect the outcome, IRAS may discontinue when the omission is discovered.

A later request to resume a discontinued or withdrawn MAP is treated as a new application, evaluated in light of prior experience. Fraud, misrepresentation or breach of the agreement’s conditions can lead to revocation or cancellation, including retroactive action. Before discontinuing the process or cancelling or revoking an agreement, IRAS informs the foreign authority of its intention and reasons.

MAP step 1: submitting the request

The four stages are application, evaluation, review and negotiation, and implementation. No prescribed MAP application form is required. Submit a letter in electronic copy only, containing the Annex A information and supporting documents, before the treaty deadline. IRAS charges no MAP application fee.

Address the letter to The Competent Authority, International Tax and Relations Division, Inland Revenue Authority of Singapore, 55 Newton Road, Revenue House, Singapore 307987. Electronic submission uses the email addresses in IRAS’ competent-authority list. The postal-style addressee identifies the recipient; it does not override this edition’s electronic-only application requirement.

MAP steps 2 and 3: evaluation and negotiation

IRAS may request clarification, discuss the case, visit premises and interview key personnel. Within one month after receiving all required information, it issues acceptance letters to the taxpayer and foreign authority. Rejection is communicated to both in writing with reasons; the one-month period runs from a complete submission, not necessarily the first letter.

Once accepted, IRAS discusses treaty-inconsistent taxation with the foreign authority, updates the taxpayer regularly and generally aims to resolve the case within 24 months of receiving the complete application. This is a resolution aim, not a guarantee or the arbitration clock: arbitration uses the treaty’s separate notified start date.

MAP step 4: implementing the outcome

Within one month after authorities reach agreement, IRAS informs the taxpayer in writing and explains the next steps. The taxpayer decides whether to accept. Unless the outcome is rejected, the authorities exchange concluding letters and implement it promptly under domestic procedures.

The agreement may also address whether interest or penalties connected with the disputed taxation should be refunded. Their refund is a matter for the agreement, not an automatic consequence of making a MAP request.

Representation, confidentiality and audit

A taxpayer appointing an agent or representative must give IRAS a letter of authorisation so it can discuss and correspond about the application with that person. Annex B provides the relevant sample. IRAS does not accept requests from agents initiating MAP while concealing the client’s identity.

Information obtained in MAP is protected by the Income Tax Act and the DTA’s confidentiality provisions. MAP does not prevent IRAS from auditing non-compliance with Singapore tax law.

Arbitration after unresolved MAP issues

Some DTAs provide mandatory binding arbitration after authorities cannot resolve issues within the specified time, generally two or three years from the notified MAP start date. Authorities may agree a different period and communicate it to the taxpayer before the original period is reached. Arbitration requires a written taxpayer request and an applicable arbitration provision; ordinary MAP availability alone does not confer it.

The panel must decide within the prescribed period. Its decision is typically final and binding on the authorities unless the taxpayer rejects it or pursues domestic recourse. Some treaties also permit the authorities to agree a different resolution of all outstanding issues within three calendar months after delivery of the panel decision, in which case that decision is not binding or implemented.

Arbitration eligibility and exclusions

All four requirements apply: binding arbitration provisions have taken effect for the case; the authorities have not resolved all issues within the applicable period and have not previously agreed an extension; the outstanding issues are not excluded by treaty or MLI reservations; and neither jurisdiction’s court or administrative tribunal has already decided them. A later such decision before the panel rules terminates arbitration.

For MLI arbitration, cases presented on or after the later MLI entry-into-force date for the partners are covered under the stated effective rule. Singapore reserved arbitration for earlier cases only where both authorities agree. MLI articles 19(2) and 19(3) can also extend the period. Singapore’s article 28(2)(a) reservations exclude cases involving its general anti-avoidance rules in section 33, relevant case law or judicial doctrines and their successors; they also cover analogous Singapore domestic provisions where the partner reserves its own laws. Authorities identify those analogous provisions and relevant exclusions in the arbitration agreement.

Requesting arbitration and choosing the decision method

Submit a written request to the competent authority of the residence jurisdiction with enough information to identify the MAP case. For Singapore, the recipient is the same International Tax and Relations Division competent authority at 55 Newton Road, Revenue House, Singapore 307987; electronic requests use IRAS’ published competent-authority emails. Consult the particular Competent Authority Agreement (CAA) on Arbitration for requirements.

Singapore adopted the MLI’s default final-offer method, generally used in its relevant treaties: each authority proposes a resolution and the panel chooses one. Under the alternative independent-opinion method, the panel considers the authorities’ information and relevant law to reach its own decision. The actual CAA controls the process.

What the arbitration CAA must address

The authorities conclude a CAA to implement binding arbitration. It covers how to request arbitration; minimum substantive-case information; appointment of arbitrators; the arbitration process; information communication and confidentiality; operating procedures; costs; failure to issue a timely decision; the final decision; implementation; the effective operation of the arbitration provisions; and excluded cases. IRAS publishes concluded CAAs as annexes to the relevant DTAs.

The guide’s section on specific treaties states that IRAS may later publish useful interpretations arising from MAP discussions after assessing their suitability. It does not itself supply an additional list of treaty interpretations beyond those already discussed in this edition.

Annex A: the complete MAP application checklist

The application must identify the taxpayer by name, address, tax identification number, contact details and principal business activities. Where an agent or representative is appointed, include the authorisation letter. Identify the particular DTA and the articles and provisions alleged to have been applied incorrectly.

Set out the relevant facts with evidence, tax years or periods and amounts. Provide an analysis of the issues and the taxpayer’s treaty interpretation, supported by documents such as assessments and audit records. Disclose any foreign domestic remedy already pursued and supply decisions. Also disclose similar issues previously or currently considered in an advance ruling, advance pricing arrangement, settlement, comparable proceeding, tribunal or court, with relevant available decisions.

Explain how the matter appears in the Singapore income-tax return, for example an exclusion of income or foreign-tax credit claim. Finally confirm that the information and documents are accurate and undertake to help the authority resolve the case by supplying further requested material promptly. These are nine categories of minimum information, not simply a statement that double taxation occurred.

Annex B: preparing the authorisation letter

Use the taxpayer’s letterhead and date the letter. Address the International Tax and Relations Division, Inland Revenue Authority of Singapore, 55 Newton Road, Singapore 307987, naming the case officer if known. The subject should identify the taxpayer and its MAP application.

State the appointed tax agent or representative’s name and contact details, explain that the appointment covers all matters relating to the application, and authorise IRAS to communicate with that representative by letter, telephone and electronic means, including email. Close with the signatory’s name and designation and the taxpayer’s name. Select the appropriate agent or representative description rather than leaving both alternatives unresolved. The sample supplies these authorisation elements; it is not a substitute for the substantive MAP application.

Publication changes and historical contact details

The 15 June 2018 update added the Singapore–Australia interpretation agreed on 1 May 2018 and made minor editorial changes. The 23 October 2021 third edition expanded section 7 with arbitration guidance, removed the South Korea reference from the relevant older-treaty footnote and made clarifying editorial changes.

This edition lists IRAS enquiry numbers 1800 356 8622 for companies and 1800 356 8300 for individuals. For an actual application or enquiry, consult the official treaty text, its MLI modifications, applicable arbitration CAA and IRAS’ current contact and submission pages. This historical article retains the third edition’s dates and procedures without merging later-edition changes into the source.