561421

Telephone Answering Services

Administrative and Support and Waste Management and Remediation Services › Administrative and Support Services › Business Support Services

SBA Size Standard

$19M average annual receipts

Revenue-Based Verify at SBA.gov →

NAICS Code Hierarchy

56

Sector

Administrative and Support and Waste Management and Remediation Services

561

Subsector

Administrative and Support Services

5614

Industry Group

Business Support Services

561421

National Industry (This Code)

Telephone Answering Services

Official NAICS Description

Source: U.S. Census Bureau 2022 NAICS

📘 Source: U.S. Census Bureau — 2022 NAICS Manual
This U.S. industry comprises establishments primarily engaged in answering telephone calls and relaying messages on behalf of clients or for other establishments of the same enterprise.

✓ Small Business Eligibility at a Glance

Based on SBA Table of Small Business Size Standards (2024)

Size Standard

$19M average annual receipts

Measurement Period

3-year average

Standard Type

Revenue-Based

Applies To

All contracts under NAICS 561421

Set-Aside Programs

8(a), WOSB, HUBZone, SDVOSB

Certification Required

No (self-certify in SAM.gov)

Size standards are set by the SBA and reviewed periodically. Always verify at SBA.gov before bidding.

Cross-References

The following activities are classified elsewhere in the NAICS system:

Establishments primarily engaged in providing paging or beeper transmission services are classified in U.S. Industry 517112, Wireless Telecommunications Carriers (except Satellite).

How to Use NAICS 561421 in SAM.gov

NAICS code 561421Telephone Answering Services — is used in SAM.gov to identify businesses whose primary activity falls within this classification. When you add this code to your SAM.gov entity registration, contracting officers searching for vendors in the Business Support Services space will be able to find your business.

If this code represents your primary business activity, designate it as your primary NAICS code. Your primary NAICS code determines your size standard for any contract solicited under this code. With a size standard of $19M average annual receipts, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 561421.

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Frequently Asked Questions

What is NAICS code 561421?

NAICS code 561421 is 'Telephone Answering Services', classified under the Administrative and Support and Waste Management and Remediation Services sector (NAICS 56). This U.S. industry comprises establishments primarily engaged in answering telephone calls and relaying messages on behalf of clients or for other establishments of the same enterprise. Cross-Referen

What is the SBA small business size standard for NAICS code 561421?

The SBA defines a small business under NAICS code 561421 (Telephone Answering Services) as one with $19M average annual receipts. This size standard determines eligibility for small business set-aside contracts, 8(a), HUBZone, WOSB, and SDVOSB programs in SAM.gov.

How do I register NAICS code 561421 in SAM.gov?

To register NAICS code 561421 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 561421 (Telephone Answering Services) to your NAICS code list. You may designate one code as your Primary NAICS code.

Quick Actions

Related NAICS Codes

Other codes in Business Support Services

Related PSC Codes

PSC codes commonly used with this NAICS sector

Source: GSA PSC Manual April 2025

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