Methodology overview

Editorial principles

The directory's editorial work is organised around three principles: sober tone, sourced facts, self-aware framing.

Sober tone means: no superlatives, no marketing language, no second-person tax imperatives. We don't tell readers "you-must-file..." — we describe what filing requirements apply and let readers determine what's relevant to their situation. We don't describe firms as "leading," "premier," or "best in class" — we describe their practice scope, credentialing, and corroborated review-data factually.

Sourced facts means: every numerical claim in editorial content carries an inline citation marker linking to the source. The source registry is published per page and per topic hub. Claims that cannot be sourced to a current authoritative reference are removed from the article rather than published with implicit uncertainty.

Self-aware framing means: where reasonable professionals disagree on the right answer (a treaty position, a specialty-area scope question), we describe the disagreement rather than asserting one side. Where the underlying authority's guidance is itself ambiguous, we say so and link to the ambiguous guidance.

Editorial scope

Country deep pages: 90 jurisdictions covered (top-30 priority + mid-60 second-tier) at 1,500-3,500 words each, with 8 question-format H2s covering tax authority, tax year + filing deadlines, residency, personal income tax, corporate tax, indirect tax, cryptoasset tax, treaty network. Long-tail country pages cover the remaining ~158 jurisdictions at 500-800 words.

Topic hubs: 22 substantive areas (crypto, expat, capital gains, self-employment, foreign-earned-income exclusion, FATCA/FBAR, business tax, sales/VAT/GST, double-taxation treaties, residency rules, quarterly estimated tax, payroll tax, transfer pricing, estate tax, inheritance tax, R&D credit, treaty benefits by country, identity theft, audit defence, streamlined filing, pass-through entity tax, depreciation §179) at 3,000-3,800 words with 30-row comparison tables for each topic.

Firm registries: top-30 jurisdictions covered with 7-8 firms each (Big-4 + national-tier-2 + selected regional/boutique). Long-tail jurisdictions covered with smaller firm sets. Each firm row carries probe_status and byline_pending flags pending the firm-health worker probe and named-editor restamp respectively.

Source registries: top-30 jurisdictions covered with 7-8 authoritative sources each (tax authority website, primary statute, KPMG/PwC/EY/Deloitte tax-summary, OECD tax-administration reference). Mid-60 source registries are built opportunistically as country deep pages are written.

Sourcing standards

Each editorial page lists sources with: publisher, publication or accessed-at date, URL, source ID. Source IDs are stable; cited claims reference source IDs rather than ad-hoc URLs.

The source-priority hierarchy: (1) tax authority's official guidance or registry, (2) primary legislative text, (3) Big-4 / mid-tier accountancy firm tax-summary publications (KPMG, PwC, EY, Deloitte, BDO, RSM), (4) academic / IBFD / OECD references for cross-jurisdictional context, (5) reputable legal-industry publications (Tax Notes, IFA, IBA, etc.).

Where a Big-4 tax-summary and a tax authority's guidance disagree (this happens occasionally on edge cases), we follow the tax authority and note the disagreement.

Review and reviewer accountability

Every page on the directory has either a named reviewer (with credentials and review date) or the byline_pending: true flag. The reviewer is the editorial team member who has substantively reviewed the content and verified the source citations against the originals.

Pages in byline_pending state are visible at their direct URL with a "Pending editorial review" banner but are noindexed (not in the directory's sitemap) until the named-editor restamp pass clears them. The restamp pass is a manual review by a named editor with relevant credentials; it includes spot-checking of source citations and overall fact-pattern coherence.

The byline-pending queue's status is visible in the editorial dashboard; the public-facing portion shows aggregate counts (e.g., "X pages awaiting restamp") without per-page detail.

Update cadence

Country deep pages: reviewed annually at minimum, with bulk-update events triggered by major fiscal-act passages (e.g., a new EU Pillar Two transposition, a US fiscal-cliff event, a major tax authority bracket revaluation).

Topic hubs: reviewed annually with the country-page bulk-updates, plus event-driven updates when underlying authorities issue new positions on the topic.

Firm registries: reviewed quarterly via the firm-health worker probe (which checks website resolution and credentialing-authority registry status) plus annually via editorial walkthrough.

Source registries: reviewed weekly via the link-health cron (Sunday 02:00 UTC) which checks for 404s and is_dead flags on cited URLs; broken citations trigger noindex of the parent page until corrected.

Corrections changelog

The corrections changelog (linked from corrections-and-edits-policy) is a public, append-only record of every applied correction. Reviewing the changelog is the most direct way to see how editorial work updates over time and where the most-frequently-corrected areas are.

Annual transparency report

The annual transparency report (referenced in affiliate-disclosure) covers: editorial expenses by category, total reviews handled, total corrections applied, total tier-subscription revenue, total affiliate-program revenue, total user count, named-reviewer assignments per editorial domain.

The transparency report is the directory's primary mechanism for demonstrating that editorial work is independent of commercial relationships.