Costabile & Steffens P.C. is a Certified Public Accountant firm based in Rolling Meadows, Illinois, serving individuals and small to mid sized businesses. The firm provides tax, accounting, and advisory support, with source facts noting more than 40 years of experience and services for both personal and business needs.

Its work includes tax planning and tax services, bookkeeping, payroll, sales tax, new business formation, and help with IRS notices and audits. Costabile & Steffens P.C. is also listed as a QuickBooks Pro Advisor, supporting clients who use QuickBooks as part of their accounting workflow. Services are available in person and remotely.