DoubleTaxation

DoubleTaxation (doubletaxation.app) tells an individual which country they are a tax resident of, and where their income is taxed.

Claude asks the user the same questions as the website, one at a time: permanent home, family, centre of vital interests, days of presence, citizenship. The answers go to a rules engine, which computes the result. The result is not generated by the model.

The result includes:

• conclusion and a reliability score;
• how the domestic law of each country treats the person;
• the treaty tie-breaker (Art. 4) and any conflict between the two laws;
• which taxes apply in each country, in plain language;
• legal basis with links to the statutes and treaty texts, plus relevant court decisions;
• optional per-income rules (salary, self-employment, pensions, dividends, interest, royalties, capital gains, rental income and more): which state may tax it, treaty rate limits, the method of relief, and an illustrative calculation;
• a link that opens the same result on doubletaxation.app, where it can be saved as a PDF.

A separate tool shows the tax burden on a salary in 21 countries (OECD Taxing Wages method), including special tax regimes for individuals.

Coverage: 12 versions, each written for taxpayers of one home country and in its language: Ukraine, United States, Poland, Czechia, Romania, Hungary, Türkiye, China, India, Japan, Bangladesh, Pakistan. Each version checks the home country against 20 other countries.

Tools: list_versions, list_countries, check_residency, tax_burden. All tools are read-only. No account is needed.

Privacy: answers are processed in memory only and are never stored or logged.

The result is general information, not legal advice.