Sigma Accountants
- Patient
- Tax Laws
- Tax Planning
24 firms listed · 18 in Columbia · 5 open weekends · 19 rated 4.5+
Data verified October 21, 2026
The 24 firms listed for Columbia, MD prepare accounts, statements and returns for businesses and individuals. What each says about its services and software comes from its own website; ratings and quotes come from public reviews.

Of the 24 firms we list here, 18 are in Columbia itself and 6 come from towns including Rockville (2, 18 mi), Ellicott City (1, 5 mi) and Greenbelt (1, 13 mi). 20 of the firms on this page have a rating, from 4.0 to 5.0 across 522 reviews; 4 have 50 or more reviews and 19 are rated 4.5 or higher. When clients rate these firms on specific qualities, they most often praise professionalism (97%), responsiveness (82%) and quality (76%). The topics that come up most in reviews of the firms on this page are "efficient", "knowledge" and "trust". 5 are open on Saturdays. 6 have a BBB rating of A or A+. Domain records put 16 websites of the firms on this page at ten or more years old; the oldest dates from 1998. 1 offers remote or virtual consultations; 2 offer payment plans and 2 offer a free initial consultation. We have a website on file for 21 of the firms on this page; 17 publish a contact page; 16 list a public email and 5 take 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.
5 of the 24 firms take appointment requests through their own website. A firm without that option usually prefers a phone call or an email with a short description of your business. Either way, have your last filing to hand so the first conversation is about numbers rather than guesses.