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Top Accounting Firms in Illinois

17 of 72 accounting firms ranked on evidence in the Q4 2026 edition.

Between them, the 72 accounting firms on this page cover tax (35), accounting (32), business services (6) and medical (6). They also list work in Indiana, Chicago, Wisconsin and Washington. 72 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

17 of 72 accounting firms ranked on evidence held on 6 October 2026: client reviews, vetting, awards and facts each business states on its own website, which we read and date. Nobody pays to be placed.

Positions are fixed for the quarter; the next edition is due in January 2027.

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  1. Fick, Eggemeyer & Williamson, CPAs logo

    Calculators · Also in Missouri

    Fick, Eggemeyer & Williamson, CPAs, which trades as F.E.W. CPAs, is an accounting firm with offices in St. Louis, Missouri and Columbia, Illinois.

    Why #1: Based in St. Louis, Missouri, with a second office in Columbia, Illinois · In business 50+ years, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  2. DHJJ logo

    DHJJ is a certified public accounting and advisory practice with offices in Naperville and St. Charles, Illinois.

    Why #2: Based in Naperville and St. Charles, Illinois, USA · In business 50+ years · Team of 100+, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  3. Lamb, Little & Co. logo

    Insurance · Property · Dental

    Lamb, Little & Co. is an independent insurance agency serving clients in Illinois and beyond.

    Why #3: Based in Illinois · Founded 1947, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  4. Ginoli & Company logo

    Responsive · Calculators · Newsletters

    Ginoli & Company is a certified public accounting firm in Peoria, Illinois, that has served clients across central Illinois since 1951.

    Why #4: Based in Peoria, Illinois · Founded 1951, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  5. Dugan & Lopatka logo

    Business Services · Real Estate · Non Profit

    Dugan & Lopatka, also written D+L, is a certified public accounting firm serving the Chicago area.

    Why #5: Based in Chicago, Illinois, USA · In business 52+ years · Family-owned, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  6. Accounting Freedom, Ltd. logo

    Tax · Accounting · Reporting · Also in Wisconsin

    Accounting Freedom, Ltd. has worked with small businesses since 1981 from two offices, in Mundelein, Illinois and Grafton, Wisconsin.

    Why #6: Based in Mundelein, Illinois and Grafton, Wisconsin, USA · Founded 1981, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  7. Dieck Arenas & Associates PC logo

    Dieck Arenas & Associates PC is a certified public accounting practice in Waukegan, Illinois.

    Why #7 (shared): Based in Waukegan, Illinois, United States · In business 40+ years, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  8. Cukierski & Kowal logo

    Business Services · Real Estate · Non Profit

    Cukierski & Kowal is a family-run certified public accounting firm in Illinois, presented on its website as Cukierski & Associates, LLC.

    Why #7 (shared): Based in Illinois, United States · In business 40+ years · Family-run, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  9. JL Accounting, Inc. logo

    JL Accounting, Inc. is an accounting and tax practice in Woodstock, Illinois. It has served McHenry County and the rest of northern Illinois since 1994.

    Why #9: Based in Woodstock, Illinois · Founded 1994, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  10. January Accounting Service logo

    Tax · Accounting

    January Accounting Service is an accounting firm in Waukegan, Illinois.

    Why #10: Based in Waukegan, Illinois, USA · Founded 1995, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  11. Labor Network logo

    Also in Dundee

    Labor Network is a family-founded staffing firm in the Chicago area.

    Why #11: Based in Chicago area, Illinois · In business 30+ years, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  12. BJS & Associates, Ltd. logo

    Hanover Park, Illinois CPA firm providing tax, accounting, bookkeeping, payroll and financial consulting to businesses and individuals

    Why #12: Based in Hanover Park, Illinois, USA · Founded 1998, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  13. Eilts & Associates logo

    Business Services · Real Estate · Financial Services

    Eilts & Associates, Inc is a certified public accountancy and consulting practice serving Chicago and its suburbs. It works with both businesses and private individuals.

    Why #13: Based in Chicago, Illinois area · In business 25+ years, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  14. ARCC Consulting logo

    Tax · Accounting · Books

    ARCC Consulting is an accounting and tax practice in Lake Forest, Illinois, serving businesses and individuals across the United States.

    Why #14 (shared): Based in Lake Forest, Illinois, USA · In business 20+ years, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  15. James G Flannery CPA LLC logo

    James G Flannery CPA LLC is an accounting office serving individuals and small businesses in Chicago and the north-west suburbs of Illinois.

    Why #14 (shared): Based in Chicago, Illinois · In business 20+ years, as stated on its own website, read 5 Oct 2026

    Not yet on record: client reviews, vetting.

  16. AC Financial Services logo

    AC Financial Services, Inc. handles tax and accounting work for both people and companies from Schaumburg, Illinois.

    Why #14 (shared): Based in Schaumburg, Illinois · In business 20+ years, as stated on its own website, read 28 Sept 2026

    Not yet on record: client reviews, vetting.

  17. DT

    Tax · Energy · Also in United States and Chicago

    Davis Tax Services is a tax and financial consulting practice in Chicago, Illinois.

    Why #17: Based in Chicago, Illinois, United States · In business 12+ years, as stated on its own website, read 29 Sept 2026

    Not yet on record: client reviews, vetting.

  18. Also listed, not yet ranked. We hold nothing checkable on these yet that ranks them here: no client review, vetting, award, expert review, or fact stated on their own website (and on a place ranking, where they are based). They follow in order of their TrustList Score. How TrustList ranks · Get vetted, free
  19. Hopp Accounting & Tax Service logo

    Tax · Accounting · Insurance

    Hopp Accounting & Tax Service is an accounting and tax practice for both personal and business clients.

    On record: In business 50+ years, as stated on its own website, read 5 Oct 2026

  20. Lenning & Co., Inc. logo

    Tax · Accounting · Education · Also in Reading and Los Angeles

    Lenning & Co., Inc. is an accounting practice founded in 1979 by Gerald Lenning, a certified public accountant, at its Seal Beach office.

    On record: Founded 1979, as stated on its own website, read 5 Oct 2026

  21. Diamond Financial Corporation logo

    Tax · Accounting

    Diamond Financial Corporation is a certified public accounting practice led by Joe Diamond, who holds CPA, CFP and Enrolled Agent credentials and a master's in taxation.

    On record: Founded 1990 · Owner-run, as stated on its own website, read 29 Sept 2026

  22. Holland & Company, CPAs logo

    Financial Services · Tax · Accounting

    Holland & Company, CPAs is a firm of certified public accountants that has worked with businesses and individuals since 1990.

    On record: Founded 1990, as stated on its own website, read 5 Oct 2026

  23. Brown CPA Group logo

    Hospitality & Leisure · Business Services · Real Estate · Also in Northbrook, Illinois and Dundee

    Brown CPA Group, formally Brown CPA Group, Ltd., is an accounting firm focused on income tax work.

    On record: In business 35+ years, as stated on its own website, read 28 Sept 2026

  24. dmar consulting llc logo

    Tax · Accounting · Medical

    dmar consulting llc is an accounting and business consulting firm founded in 2008.

    On record: Founded 2008, as stated on its own website, read 29 Sept 2026

  25. LA Swan Consulting logo

    Non Profit · Accounting · Responsive · Also in Norwich

    LA Swan Consulting LLC is an accounting and business consulting firm led by its president, Lisa A. Swan, who holds an MBA.

    On record: In business 15+ years, as stated on its own website, read 5 Oct 2026

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