How to Choose a Bookkeeper in Illinois (2026)

To choose a bookkeeper in Illinois, check the firm on the state's own records, confirm any CPA claim on the Illinois Department of Financial and Professional Regulation, Division of Professional Regulation lookup, and get the fee and the monthly close date in writing. Plan to ask about price: only 7 of the 120 Illinois firms we list publish one.

What an Illinois bookkeeper keeps track of

These are the state filings your books feed in Illinois. Which ones apply depends on your entity type, what you sell, whether you have employees and the schedule each agency assigns. It's general information, not tax advice. The bookkeeper keeps the records; you, or whoever your engagement letter names, file.

• Sales and use tax. The Department of Revenue sets your Form ST-1 frequency from your registration and annual liability. Average monthly liability over $200 can mean monthly returns, $50 to $200 quarterly, and under $50 annual. Returns and payment are due by the 20th of the month after the reporting period. Source: Illinois Department of Revenue, checked September 26, 2026.
• Withholding returns. Illinois employers file Form IL-941 electronically every quarter, due by the last day of the month after the quarter ends. Payments run on a separate schedule the Department assigns: monthly payments are due by the 15th of the next month, and semi-weekly payers pay within days of each payroll. Source: Illinois Department of Revenue, checked September 26, 2026.
• Unemployment wage reports. The quarterly Employer's Contribution and Wage Report (UI-3/40) goes to IDES by April 30, July 31, October 31 and January 31. Employers with 25 or more employees in the prior calendar year file it electronically and also send monthly wage reports for the first two months of each quarter. Source: Illinois Department of Employment Security, checked September 26, 2026.
• LLC annual report. Every Illinois LLC, and each foreign LLC admitted to do business there, files an annual report with the Secretary of State. It's delivered with the fees within the 60 days before the first day of the LLC's anniversary month, and the statutory filing fee is $75. Source: Illinois General Assembly, checked September 26, 2026.
• CPA title. Illinois reserves "Certified Public Accountant", "Public Accountant" and the abbreviations "C.P.A." and "CPA" for people holding a license or registration from the Department, or exercising the Act's practice privilege. Source: Illinois General Assembly, checked September 26, 2026.

How to check an Illinois firm yourself

The Illinois Department of Financial and Professional Regulation, Division of Professional Regulation lookup settles any CPA claim in a minute. For the business itself, search its legal name on the Illinois entity search. Someone trading under their own name may not be there at all, and that's normal. Illinois publishes these records as open data, so our lists already carry the checks: we matched an active CPA license or permit for 35 firms of the 120 Illinois firms we list. Matched CPA records include MH CPA PLLC, Gorenz and Associates, Ltd., MCK CPAs & Advisors, Insight CPAs & Financial PLLC and Feller Kuester.

What Illinois firms put in writing

106 of the 120 firms we list in Illinois say nothing about fees on their websites, and 7 publish a price or a starting price, 6% against 10% nationally. 20 of 120 say how often reports arrive (17%, against 21% nationally), 20 describe onboarding and 14 offer catch-up or cleanup work. The software Illinois firms name most is QuickBooks (38%).

Where to start in Illinois

• Metro pages: Chicago-Naperville (102 firms, ranked).
• Firms that publish a price or a starting price: Hunter Green CPA, Amber's Accounting & Bookkeeping, Pasquesi Partners LLC, Steph's Books, CJC and Associates, Aapril Tax Service and 1 other.
• Firms that say they take on catch-up work: Hunter Green CPA, Amber's Accounting & Bookkeeping, Steph's Books, Founder's CPA, The Wozny Tax Company, CJG Partners LLP and 8 others.
• Highest Evidence Scores in the state: Hunter Green CPA (72), Amber's Accounting & Bookkeeping (69) and Pasquesi Partners LLC (69).

Questions for the first call

• What is the monthly fee, how many transactions does it assume, and what costs extra?
• On what day of the month will my books be closed, and what report do I get?
• Who files the sales and use tax return, you or me, and is it inside the fee?
• How do you keep the records for withholding returns ready before each due date?
• Can you clean up past months first, and what does that cost?
• Which accounting software do you work in, and who owns the file if we part ways?