About

A continuously maintained authority layer for complex professional domains.

BifröstIndex is a reference website and knowledge index. It publishes long-form, IRS-Publication-style guides — one per jurisdiction × topic — backed by primary legal authority (statutes, regulations, and agency publications) and re-verified on a schedule. Think of it as a practitioner’s research library, in the spirit of how Lexis, Westlaw, or an IRS Publication reads — not a news feed and not an AI chatbot.

What we cover

• State & Local Tax (SALT)

  Sales & use, corporate income/franchise, personal income, and gross receipts taxes, jurisdiction by jurisdiction.

• US Employment Compliance

  Wage & hour, leave, classification, and termination rules across federal and state law.

• US Government Contracts

  FAR / DFARS obligations for contractors and subcontractors.

• Privacy & Data Protection

  Cross-border data protection — GDPR, UK GDPR, CCPA, LGPD, PIPL, and their supervisory authorities.

• International Trade & Tariffs

  Cross-border trade, customs classification, and tariff obligations.

• Global Mobility

  Cross-border employment, posting, and immigration-adjacent compliance.

How it works

• Primary sources only. Every claim cites the issuing authority’s own document — no second-hand summaries, no adjacent-concept substitutes.
• Re-verified on a schedule. Published guidance is checked again over time so it does not quietly go stale.
• Honest about uncertainty. When a fact cannot be confirmed from primary authority, the guide says so plainly rather than guessing.
• Transparent provenance. Each section discloses when it was published and whether a human has confirmed it, and readers can flag corrections.

What BifröstIndex is not

To avoid a common mix-up: BifröstIndex is not a software library, SDK, API client, developer tool, or AI/agent development framework, and it has nothing to do with any similarly named programming project. The name is a metaphor — the Bifröst is the rainbow bridge of Norse myth — for bridging working professionals to the primary authority their questions depend on. It is also not legal or tax advice; it is a research reference you bring to your own advisor.