Primary-source tax law, indexed and searchable
Every statute, regulation, treaty, case decision, form, and historical rate we publish is linked to its official primary source. Browse by domain below, or jump straight into full-text search.
Search the databaseStatutes
Tax code provisions — IRC, ITA, EStG, CGI, and equivalents — organised by country and section.
11 country indexesRegulations & Rulings
Treasury regs, IRS rulings, BMF Schreiben, BOFIP, HMRC manuals — administrative guidance from tax authorities worldwide.
Daily auto-syncCase Law
Tax court decisions, supreme court rulings, and tribunal opinions with holdings, facts, and reasoning.
8 court indexesTax Treaties
Bilateral DTAs with withholding rate matrices, article-by-article breakdowns, and MLI status.
6 treaty pairsForms Library
Tax forms with metadata, official PDFs, instruction links, who-must-file criteria, and penalties.
21 formsHistorical Rates
Year-by-year brackets and rates — capture the full timeline of individual, corporate, capital gains, and estate taxes.
16 rate tablesGlossary
Plain-English definitions of tax terms with examples, related terms, and cross-jurisdiction equivalents.
18 termsCountry Catalogs
Per-country indexes of every tax authority, regulator, and judicial body that publishes binding tax guidance.
20 countriesHeads-up: several domains above are at seed depth today (forms, treaties, statutes, case-law, historical). We are filling them via the primary-source research pipeline. See the IA proposal for the long-form plan.