Step 1 of 4 · The mapCompany tax department › Direct & International Tax

The mapCompany tax departmentDirect & International Tax

International tax

partly covered · 4 open projects

Permanent establishments, withholding taxes, treaty access, CFC regimes, interest limitations, hybrids, foreign tax credits, repatriation.

The honest read

A CC0 dataset of US dividend withholding rates, Taiwan's treaty list and rates as open data, an Irish withholding decision tool and an Indonesian treaty calculator are open; the treaty agents and a permanent establishment study tool are prototypes. Treaty logic, structure comparison and a treaty database with its texts: nothing open.

A draft: not yet reviewed by a tax specialist.

Start with

Two open datasets of withholding rates, one of them a tax authority's. The treaty agents are prototypes to read.

Its 4 projects

ProjectKindJurisdictionLast updateStars
us-dividend-whtCC0 dataset of US dividend withholding rates for non-residents by country of residence, CSV and JSON.Tax datasetsUS · GlobalSep 2026—
Tax Treaty Overview (Taiwan Ministry of Finance)Taiwan's list of income tax treaties and treaty withholding rates, three CSV files under an open licence.Tax datasetsTWSep 2026—
before-you-payStatic decision tool for Irish outbound withholding tax: which rule decides and at what rate.Licence unknownCalculatorsIEAug 2026—
indonesia-tax-calculatorIndonesian tax calculator for foreign investors, with withholding tax and treaty rates for 14 countries.CalculatorsIDApr 2026—

Every project here is maintained and serves a company tax department. See the team's projects in the list.

Processes of this team

Next · Step 2 of 4ProjectsEvery open source tax project in one list you can search by tax, country and kind.