Methodology

Where the data comes from

Every figure in Tax Map is sourced from a primary authority — a national tax authority, finance ministry, official immigration portal, or a recognised primary reference — and is stored with its own source URL and a short verbatim excerpt. Open any country page and you can click straight through to the original document.

We never use AI to generate, estimate, or fabricate tax data. Our pipeline uses AI only to find and extract facts from real published sources — never to invent a number. Where a field genuinely has no published source (a handful of micro-states), we leave it blank rather than guess.

How it's assembled

For each jurisdiction a discovery step locates the official source for each field, then extracts the value, the source URL, and a supporting quote. Each record is validated against a typed schema and stored as a JSON object in Cloudflare R2. Country geometry is joined from Natural Earth (public domain) and rendered as vector tiles with tippecanoe.

What's covered (231 jurisdictions)

Estimates vs. facts

The country data is factual and cited. The personalised fit ranking and the relocation calculator are estimates built on top of those facts: they use headline / top rates and a transparent scoring model, and are designed to shortlist and point you in the right direction — not to replace advice from a qualified tax professional.

Refresh

The dataset is refreshed on a regular cadence and each figure carries the date it was last verified. Tax law changes — always confirm against the linked source before acting.