Double Taxation Treaty Checker
Compare withholding under selected sourced treaty scenarios, or enter verified rates for another country pair. Review coverage and eligibility limits.
How It Works
Choose the recipient’s country of tax residence, the country where income originates, the income type, and the gross income amount. The sourced examples cover selected United States source payments to nonresident individuals. The direction matters: a rate for United States source income is not a rate for income flowing in the other direction.
When a sourced scenario is available, compare the conditional treaty rate with a 30% statutory reference rate and the resulting withholding difference. These examples assume treaty eligibility, ordinary portfolio dividends or standard interest or royalty income, and no applicable domestic exemption. They do not determine whether those assumptions apply to a payment.
For other country pairs or unsupported income types, the tool shows that a sourced rate is unavailable. Enable manual rates to enter two rates verified from your payer or the relevant authority. Manual results are arithmetic comparisons, not a treaty lookup or confirmation that a treaty exists.
Compare source withholding separately from residence country tax and foreign tax credits. A reduction in withholding can change cash received without reducing the final combined tax by the same amount.
Step by step
- Choose residence country, source country, income type, and gross income amount
- Check coverage or enter two independently verified rates in manual mode
- Review the withholding difference, source reference, and eligibility assumptions
Worked example
Choose United Kingdom residence, United States source, dividends, and $10,000 of gross income. The sourced portfolio dividend scenario compares a conditional 15% treaty rate with the 30% statutory reference.
The rate difference is 15 percentage points and the withholding difference is $1,500. This assumes that the recipient and payment qualify for the treaty rate and that the reference rate otherwise applies. Reversing the country direction does not reuse these rates.
When to use this calculator
Use sourced scenarios to understand a conditional withholding comparison, or manual mode to compare rates you have already verified for a particular payment.
Use official treaty text and your payer’s requirements to check eligibility. Calculate residence country tax and foreign tax credits separately.
Common mistakes
Swapping residence and source countries changes the question. A treaty summary for payments from the United States cannot establish the withholding applied by another country to a United States resident.
Treating an unavailable rate as zero or assuming that a treaty exists can understate withholding. Verify manual rates and eligibility independently, including any domestic exemption before using a 30% reference.
The Formula
Rate difference in percentage points = Reference rate − Comparison rate
Withholding difference = Gross income × Rate difference / 100
Sourced examples use a 30% statutory reference for eligible United States source income. Domestic exemptions can reduce that reference. Manual mode uses only the rates entered. A withholding difference does not measure final worldwide tax savings.
Limitations and assumptions
Sourced examples are limited to selected United States source payments and are not a complete treaty database. The 30% statutory comparison can be reduced by domestic exemptions, including certain interest exemptions. Rates depend on the payment and recipient’s eligibility. Manual inputs are unverified by the tool. Residence country tax, credits, refunds, corporate ownership relief, and special distribution rules are not modeled.
Key terms
- Source country
- The country where the payment originates for the withholding comparison. It is separate from the recipient’s country of tax residence.
- Conditional treaty rate
- A rate that can apply only when the recipient, payment, and required documentation meet the relevant treaty conditions.
- Withholding difference
- The payment amount multiplied by the reference rate minus comparison rate, divided by 100. It is not the final combined tax in both countries.
Compare alternatives
The Dividend Tax Comparator models a separate United States resident tax question. It does not calculate nonresident withholding or determine whether a treaty rate applies.
The Tax Bracket Calculator can inspect ordinary United States federal income bands. That result and a source withholding comparison should not be added together as a complete cross border tax bill.
FAQ
Does the direction of the country pair matter?
Yes. Select where the recipient is resident and where the income originates separately. Sourced United States withholding examples apply only when the United States is the source. The tool does not infer the reverse direction from a bilateral treaty summary.
Which sourced scenarios are included?
Selected United States source examples cover United Kingdom, German, French, Dutch, Irish, Canadian, Australian, and Japanese residents. Coverage depends on income type. Canadian royalties and Japanese interest require manual verified rates here. The dataset does not establish treaty eligibility or cover every special payment category.
What happens when a rate is unavailable?
The tool reports an unavailable sourced rate and leaves the rate and withholding results empty. It does not invent a domestic rate or assume a treaty. You can still compare two rates you have independently verified using manual mode.
Is the withholding difference my final tax saving?
No. It is the gross payment multiplied by the difference between two withholding rates. Residence country tax, foreign tax credits, domestic exemptions, refunds, and payment eligibility can change the final tax result.
Does a displayed treaty rate mean I qualify?
No. Residence, beneficial ownership, documentation, payment type, and treaty conditions must be checked separately. The examples exclude special corporate ownership rates, contingent interest, equipment leasing royalties, permanent establishment income, and special fund distributions. Consult the linked official guidance and payer requirements.
Related Tools
Compare United States resident dividend treatment with Dividend Tax Comparator, inspect ordinary income bands with Tax Bracket Calculator, and calculate investment returns separately with Total Return Calculator.