Double Tax Treaty Portugal UAE | A Comprehensive Guide

The Portugal-UAE Double Tax Treaty (DTT) was signed on 23 September 2008 and entered into force on 29 December 2010, giving individuals and businesses operating across both countries a framework to avoid being taxed twice on the same income. Since UAE Corporate Tax took effect under Federal Decree-Law No. 47 of 2022, the treaty’s provisions carry weight on both sides of the relationship, not just for Portuguese tax purposes as originally understood when the treaty was signed.

This guide covers what the treaty actually covers, how it now interacts with UAE Corporate Tax, and how a business or individual actually claims the benefits it provides.

What the Treaty Covers

The treaty has broad scope, covering income from immovable property, business profits, dividends, interest, royalties, personal services, capital gains, and other income categories. It also includes provisions addressing double taxation on estates and inheritances, so individuals with cross-border assets aren’t taxed on the same property in both jurisdictions.

Also check: International Tax Advisory

Reduced Withholding Tax

One of the treaty’s central benefits is reducing or eliminating withholding tax on specific income types, particularly dividends, interest, and royalties, compared to the rate that would otherwise apply without treaty relief. The exact reduced rate that applies in a given case depends on factors including ownership percentage, the type of income involved, and whether either party is a government entity, since government bodies including central banks often receive more favorable treatment. Given how much these specifics can vary case by case, and that treaty terms and their interpretation can be updated over time, businesses should confirm the specific applicable rate for their situation rather than assume a single flat percentage applies across every scenario.

Tax Credits and Dispute Resolution

The treaty allows a resident of one country to claim a credit for tax already paid on the same income in the other country, directly reducing the risk of double taxation on cross-border earnings. It also includes a dispute resolution mechanism intended to resolve tax disagreements between the two countries’ authorities in a structured way, rather than leaving affected taxpayers with no clear path to resolution.

Must check: Corporate Tax Services in UAE

How This Treaty Now Interacts With UAE Corporate Tax

When this treaty was signed in 2008, its relevance to the UAE side of a cross-border transaction was limited, the UAE had no Corporate Tax at the time. That’s no longer the case. Since Federal Decree-Law No. 47 of 2022 took effect, a UAE entity earning income from Portugal, or a Portuguese entity with a UAE presence, now needs to assess this treaty’s provisions against the UAE Corporate Tax framework directly, not just against Portuguese tax law. Whether a Portuguese company’s UAE activity creates a taxable presence, and how income flows between the two jurisdictions, now has direct UAE Corporate Tax consequences that didn’t exist when this treaty was negotiated. Businesses that structured cross-border arrangements around this treaty before 2023 should revisit that structuring in light of UAE Corporate Tax specifically, rather than assuming the original tax analysis still fully applies.

How to Claim Treaty Benefits: The Tax Residency Certificate

None of this treaty’s relief applies automatically simply because a business or individual is based in the UAE. To claim reduced withholding tax or other treaty benefits, a UAE-resident taxpayer generally needs a Tax Residency Certificate (TRC) issued by the UAE Federal Tax Authority, confirming UAE tax residency for the relevant period. This certificate is what supports a reduced withholding position with Portuguese counterparties or tax authorities, without it, the default, non-treaty withholding rate is more likely to apply regardless of the underlying treaty terms.

Common Mistakes When Relying on This Treaty

• Assuming a specific withholding rate without confirming it for the current situation. Rates vary by income type, ownership percentage, and entity status, a rate that applied to one transaction doesn’t automatically apply to another.
• Not obtaining a Tax Residency Certificate before claiming treaty benefits. Treaty relief generally isn’t automatic, the TRC is the document that actually supports the claim.
• Treating the treaty as relevant only to Portuguese tax obligations. Since UAE Corporate Tax took effect, the treaty now has direct UAE-side implications that didn’t exist when it was signed.
• Relying on outdated treaty guidance. Treaty interpretation and related domestic tax rules can change over time, confirming current treatment before relying on older analysis is worth the effort.

Frequently Asked Questions (FAQs)

How Farahat & Co. Can Help

Farahat & Co. supports businesses and individuals with Tax Residency Certificate applications, treaty benefit claims, and Corporate Tax positioning for cross-border transactions with Portugal.

Contact Farahat & Co. today to discuss your international tax and treaty benefit requirements.