What is the interest withholding rate between Portugal and United States?
Under the Portugal-United States tax treaty, the withholding rate on interest is 10%. Certain types of interest (such as government bonds) may qualify for additional exemptions under specific treaty articles. This 10% rate compares to a median of 10% across Portugal's 28 active treaty partners, and 10% across United States's 64 active partners.
Network Comparison
Portugal
Rank 20 of 28 active treaties (lowest rate = #1)
Lower rates with: Norway (10%), Poland (10%), Sweden (10%)
Higher rates with: South Africa (10%), Belgium (15%), Brazil (15%)
United States
Rank 46 of 64 active treaties (lowest rate = #1)
Lower rates with: Latvia (10%), Malta (10%), New Zealand (10%)
Higher rates with: Romania (10%), Venezuela (10%), Vietnam (10%)
Sources
- United States Treaty Reference(treaty text)
- IRS Table 1 (Withholding Rates)(rate table)
Data last reviewed: 2026-04-07