Accounting & Tax Services in Oak Lawn, IL

Oak Lawn Tax and Accounting: Licenses, Reassessment and Returns

The September 30 license renewal

The Village of Oak Lawn requires a business license for businesses operating in the village, including home occupations. Home-based businesses also file a Home Occupations Regulation Form. Every business license certificate expires on September 30, whenever the account was opened, and must be renewed each year. A business that opens in August will need to renew within weeks, so keep that date on your calendar with your tax deadlines. Contact the village’s licensing office with questions about a specific business type.

2026 is Worth Township’s reassessment year

The Cook County Assessor lists Oak Lawn in Worth Township. Worth Township is part of the 2026 south and west suburbs reassessment. Notices were mailed September 1, 2026, and the Assessor’s appeal deadline for the township is October 15, 2026. The Assessor says the values on these notices will show up on tax bills in 2027. Business owners who hold their building in a separate LLC should check that entity’s notice as well as the one for their home.

The Assessor scheduled virtual workshops on reading the Worth Township notice for September 29 (English) and September 30 (Spanish), 2026, at 6 p.m.

On sales tax: as of August 1, 2026, the IDOR rate for Oak Lawn is 10.50%, up from 10.25%, the same as Chicago’s Cook County rate. On property, an owner who misses the Assessor’s deadline can still take the case to the Cook County Board of Review when that township’s Board of Review filing period opens.

Services Oak Lawn owners use

If you own and run your business, your personal return depends on the company’s results. We offer:

• Small business accounting and tax services: ongoing books with the annual return
• LLC and S corporation formation: useful when setting up a separate property-holding entity or changing tax status
• Personal tax preparation: the federal return and the 4.95% Illinois return, including K-1 income from your business

Contact us

Our office at 1323 Butterfield Rd in Downers Grove is about 21 miles by road from Oak Lawn. Call (331) 264-4194 or send a message from the contact page.