Authority Industries: National Service Categories Overview

The Authority Industries directory organizes U.S. service providers across a structured set of national service categories, giving researchers, procurement teams, and consumers a consistent framework for locating and evaluating providers. This page defines what those categories are, explains how the classification system operates, and clarifies when a provider fits one category versus another. Understanding the category structure is foundational to navigating the Authority Industries listings and interpreting the directory's organizational logic accurately.

Definition and scope

National service categories within the Authority Industries directory are standardized groupings that cluster service providers by the type of work performed, the regulatory environment governing that work, and the geographic scope of delivery. The directory spans the continental United States and applies a single classification taxonomy across all 50 states, ensuring that a roofing contractor in Montana and a roofing contractor in Florida are evaluated and displayed against the same category criteria.

The scope of the directory covers industries where licensure, bonding, insurance, or credentialing requirements exist at the state or federal level. Categories are not invented internally — they align with established industry classification systems, primarily the North American Industry Classification System (NAICS) published by the U.S. Census Bureau and the Standard Occupational Classification (SOC) system maintained by the U.S. Bureau of Labor Statistics. Each NAICS 6-digit code maps to one or more directory categories, preventing duplication and ensuring precision. The full scope of verticals covered is described in detail on the Authority Industries multi-vertical scope page.

How it works

The category assignment process follows a tiered decision sequence:

1. Primary industry identification — The provider's dominant revenue-generating activity is matched to the appropriate NAICS 6-digit code. Where a provider spans multiple codes, the code representing more than 50% of service activity governs placement.
2. Regulatory tier assessment — Categories are flagged as either federally regulated, state-regulated, or self-regulated depending on the licensing authority. Federally regulated categories (e.g., financial services under the Consumer Financial Protection Bureau or healthcare under CMS) carry additional compliance markers.
3. Geographic delivery model — Providers are further classified by whether service delivery is location-dependent (e.g., plumbing, HVAC installation) or location-independent (e.g., tax preparation, software consulting). This distinction affects search filtering and display.
4. Credential verification linkage — Each category references the credentialing or licensing body relevant to providers in that space. The Authority Industries vetting standards page documents the verification thresholds applied per category.
5. Listing assignment and maintenance — Once placed, a provider's category assignment is reviewed on a rolling 24-month cycle or sooner if the provider's business scope changes materially.

Category data accuracy depends on the integrity of source information submitted by providers and cross-referenced against public licensing databases. The Authority Industries data accuracy policy governs how discrepancies are resolved.

Common scenarios

Three scenarios illustrate how the category system handles real-world complexity.

Scenario 1 — Single-trade contractor. A licensed electrician operating in a single metropolitan area falls cleanly into NAICS code 238210 (Electrical Contractors and Other Wiring Installation Contractors). The provider carries a state electrical license, general liability insurance, and a contractor bond. This is a location-dependent, state-regulated category with no federal licensing overlay. Category assignment is straightforward.

Scenario 2 — Multi-trade general contractor. A construction firm offering roofing, framing, and concrete work across 12 states presents a multi-code scenario. The firm's primary revenue comes from roofing (NAICS 238160), which governs primary placement. Secondary trades are listed as supplementary capabilities, not separate category placements, preventing artificial inflation of the provider's directory footprint.

Scenario 3 — Hybrid professional services firm. An accounting firm that also provides payroll processing and business insurance referrals operates across three distinct regulatory regimes: CPA licensure (state boards), payroll processing (IRS Registration under Publication 15), and insurance referral (state department of insurance). Each service line maps to a distinct category, and the firm receives a multi-category profile. This is distinct from Scenario 2 because the regulatory bodies differ — not just the trade.

Decision boundaries

The category system draws explicit lines that prevent misclassification or scope inflation.

Category eligibility vs. directory eligibility. Fitting a recognized service category does not automatically qualify a provider for a directory listing. Listing criteria, documented on the Authority Industries listing criteria page, include active licensure, verifiable physical or operational presence, and compliance with applicable state consumer protection statutes under frameworks such as the FTC's consumer protection authority (15 U.S.C. § 45).

Single-category placement vs. multi-category placement. The 50% revenue rule establishes primary placement. Multi-category placement is available only when a provider's secondary activity constitutes a genuinely separate regulated service line — not merely an ancillary offering bundled into the primary service. A plumber who also sells fixtures is a plumber; a plumber who also holds an independent HVAC license and operates a separate HVAC division qualifies for dual placement.

National scope vs. local scope. The directory maintains national scope in its taxonomy, meaning category definitions do not change state by state. However, provider listings within each category are filterable by state and metro area. A category that exists in the taxonomy but has zero vetted providers in a given state will surface as an empty result rather than displaying unvetted alternatives — a deliberate design choice that prioritizes accuracy over apparent comprehensiveness.

Providers seeking placement or researchers evaluating scope can consult the Authority Industries industry classifications page for the full taxonomy map.

References

• North American Industry Classification System (NAICS) — U.S. Census Bureau
• Standard Occupational Classification (SOC) System — U.S. Bureau of Labor Statistics
• Consumer Financial Protection Bureau (CFPB)
• Centers for Medicare & Medicaid Services (CMS)
• IRS Publication 15 (Employer's Tax Guide)
• Federal Trade Commission — Enforcement Authority (15 U.S.C. § 45)