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What is the interest withholding rate between Japan and Portugal?

Under the Japan-Portugal tax treaty, the withholding rate on interest is 5%. Certain types of interest (such as government bonds) may qualify for additional exemptions under specific treaty articles. This 5% rate compares to a median of 10% across Japan's 47 active treaty partners, and 10% across Portugal's 28 active partners.

Network Comparison

Japan

Rank 4 of 47 active treaties (lowest rate = #1)

Lower rates with: Germany (0%), France (0%), Chile (4%)

Higher rates with: Saudi Arabia (5%), United Arab Emirates (10%), Austria (10%)

Portugal

Rank 3 of 28 active treaties (lowest rate = #1)

Lower rates with: Germany (0%), France (0%)

Higher rates with: Austria (10%), Australia (10%), Canada (10%)

Sources

Data last reviewed: 2026-04-07

Important: Treaty rates require proper claim forms (e.g., IRS Form W-8BEN for U.S. treaties, HMRC DT-Individual for U.K. treaties, CRA Form NR301 for Canadian treaties) filed before payment. Limitation on Benefits (LOB) provisions may restrict eligibility. A 0% withholding rate does not mean no tax — the residence country may still tax the income. This is not tax advice.

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