# File a DBA in Illinois

Source: https://joinopenfile.com/dba/illinois
Index: https://joinopenfile.com/llms.txt

A DBA lets your business trade under another name in Illinois. State filing; fee set by year ($120 in a year ending in 6); no publication.

## Illinois details

- State fee: $120
- How it's filed: online or mail
- Form: LLC 1.20 / BCA 4.15 Assumed Name

[Where it's filed](https://www.ilsos.gov/publications/business-services/llc.html). Last checked October 2026. Fees are set by the state and confirmed again before we file.

[File my DBA](https://joinopenfile.com/existing?service=dba)

$99 + state or county fee, for any company.

## Questions

What is a DBA?

A registered trade name. Your company keeps its legal name and can also do business, advertise and take payment under this one.

Does a DBA protect my name?

No. It doesn't stop anyone else using the name. A trademark does that.

Do I need an LLC to get a DBA?

No. Sole proprietors can register one too. It just doesn't separate your business from your personal assets the way an LLC does.