When you file Schedule C (Profit or Loss From Business), you'll need to select a Principal Business Code that best describes your business activity. The IRS uses these six-digit codes to classify different types of businesses and professions.
Choosing the right code helps ensure your Schedule C accurately reflects the type of work you do.
Where Do I Enter My Schedule C Business Code?
In the software, you can find this section by following these steps:
- Federal
- Income (Select My Forms)
- Profit or Loss From Business (Schedule C)
- Basic Information About Your Business
From the Basic Information screen, select the option to view the list of available business codes and choose the one that most closely matches your primary business activity.
If you operate more than one sole proprietorship, you'll need to create a separate Schedule C for each business and select the appropriate business code for each one.
What Business Code Should I Use?
Use the business code that best describes the main activity your business performs.
Examples include:
- Retail stores
- Construction and contracting businesses
- Professional services
- Transportation services
- Real estate activities
- Information technology services
- Health care providers
For the complete list of Principal Business Codes, refer to pages 17-18 of the Schedule C Instructions.
What If My Business Doesn't Match Any Listed Code?
If you can't find a code that accurately describes your business, the IRS provides a default business code:
999999 – Unclassified Establishments
This code can be used when no other business code reasonably fits your activity. However, it should generally be used only as a last resort.
Before selecting code 999999:
- Review the complete list of Schedule C business codes.
- Choose the code that most closely matches your primary source of business income, even if it's not a perfect description.
- Use code 999999 only when no other available code adequately represents your business activity.
Why Your Business Code Matters
Your business code doesn't determine how much tax you owe, but it does help the IRS categorize your business activity. Selecting the most accurate code can make your tax return more complete and easier to understand.
If you're unsure which code applies, choose the one that best reflects the primary service, product, or activity that generates your business income.