Audit One, Ltd. is a Peotone, IL CPA firm serving non-public entities, small businesses, nonprofits, individuals, business owners, executives, and independent professionals. The firm focuses on audit needs while also offering the range of accounting and tax services expected from a local accounting practice.

Its services include audit, compilation, and review, bookkeeping, payroll support, business tax preparation, IRS representation, sales and payroll tax help, and business consulting. Audit One, Ltd. also provides Peer Review and Engagement Quality Control Review services for other CPA firms.

The firm supports clients in different business phases, from startup and business setup through expansion and ongoing consulting. Source material also notes QuickBooks support and accounting software support for clients who need help with day-to-day systems.