What's the NAICS and SIC code for an accounting firm?
For an accounting firm, use NAICS 541211 (Offices of Certified Public Accountants) in the US and SIC 69201 (Accounting and auditing activities) in the UK.
United States, NAICS 2022
541211 Offices of Certified Public Accountants
Offices of Certified Public Accountants.
SBA small business limit: $26.5 million average annual receipts.
United Kingdom, SIC 2007
69201 Accounting and auditing activities
Accounting and auditing activities.
Use this code when you register with Companies House or file your confirmation statement.
When a different code fits better
These are the codes most often confused with the main answer. Pick by the activity that earns most of your revenue.
| Code | Title | Use it if |
|---|---|---|
| NAICS 541219 | Other Accounting Services | the firm has no CPAs and offers bookkeeping or other accounting services |
| NAICS 541213 | Tax Preparation Services | you only prepare tax returns |
| SIC 69203 | Tax consultancy | you mainly give tax advice |
| SIC 69202 | Bookkeeping activities | you mainly keep books |
Good to know
In the US the split is about CPA licensing; in the UK it is about the service you sell.
You can list more than one code. Companies House accepts up to four SIC codes, and SAM.gov lets you add several NAICS codes, with one marked as primary.
What the code affects
- SBA programs and federal contracts: your NAICS code sets the size limit you must stay under to count as small. Check your size.
- SAM.gov registration: contracting officers search by NAICS, so list every code you can deliver work under.
- Companies House: your SIC code appears on the public register and in your confirmation statement.
Related business types
Codes checked against the US Census 2022 NAICS index and the ONS UK SIC 2007 index. Information only; confirm with the agency you file with.