561431 — Private Mail Centers
Description
This U.S. industry comprises (1) establishments primarily engaged in providing mailbox rental and other postal and mailing (except direct mail advertising) services or (2) establishments engaged in providing these mailing services along with one or more other office support services, such as facsimile services, word processing services, on-site PC rental services, and office product sales.
Exclusions & Cross-References
- Operating contract post offices--are classified in Industry 491110, Postal Service;
- Delivering letters and parcels (except under a universal service obligation)--are classified in Subsector 492,
- Couriers and Messengers;
- Providing voice mailbox services--are classified in U.S. Industry 561421, Telephone Answering Services;
- Providing direct mail advertising services--are classified in Industry 541860, Direct Mail Advertising;
- Providing only one of the support services (e.g., word processing services) that establishments in this
- industry provide--are classified in the appropriate industry according to the service provided; and
- Providing full service office space, whether on a lease or service contract basis--are classified in Industry
- 531120, Lessors of Nonresidential Buildings (except Miniwarehouses).
Overview Facts
| NAICS Code | 561431 |
|---|---|
| Industry Title | Private Mail Centers |
| SBA Size Standard | $19,000,000 |
| IRS PBA Code | 561430 (rolled-up match) |
| Sectors Hierarchy | Sector 56 → 561 → 5614 |
| Source / Verified | US Census 2022 NAICS Manual / 2026-06-28 |
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 7389 - Business Services (via SIC1987:7389→NAICS1997:561431→2002:561431→2007:561431→2012:561431→2017:561431→2022:561431)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 561431:
- Sector 56 Directory Hub — List of related industries in the Administrative and Support and Waste Management and Remediation Services sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.
Related Industries in 5614
Frequently Asked Questions (FAQ)
Is 561431 a valid 2022 NAICS code?
NAICS 561431 is 'Private Mail Centers', a 2022 U.S. national industry under Sector 56 (Administrative and Support and Waste Management and Remediation Services); the SBA small-business size standard is $19,000,000.
What is the SBA size standard for NAICS 561431?
The SBA small business size standard for NAICS 561431 is $19,000,000 (based on receipts).
What is the legacy SIC code mapping for 561431?
NAICS code 561431 maps to the legacy 1987 SIC codes: 7389 - Business Services.