Onyx Tax
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24 firms listed · 19 in Charleston · 2 open weekends · 17 rated 4.5+
Data verified October 17, 2026
The 24 firms listed for Charleston, SC are accounting practices that serve businesses and organizations. What each states about its CPA license and assurance work comes from its own website; ratings and quotes come from public reviews.

19 of the 24 firms we list are based in Charleston; the other 5 serve Charleston from North Charleston (9 mi). 22 of the firms on this page have a rating, from 4.0 to 5.0 across 137 reviews; 17 are rated 4.5 or higher. 2 are open on Saturdays. 2 have a BBB rating of A or A+. Domain records put 15 websites of the firms on this page at ten or more years old; the oldest dates from 2000. 1 offers payment plans and 2 offer a free initial consultation. We have a website on file for 23 of the firms on this page; 21 publish a contact page; 17 list a public email and 1 takes bookings online. We count these figures across the firms on this page; distances are straight-line, and hours and prices change, so confirm the details with the firm before you book a consultation.
An initial consultation is offered without charge by 2 of the 24 firms. For assurance work that call is about scope and timing rather than advice, and it usually ends with a request list. Have the requirement letter from your lender or funder in front of you.