Central Illinois Accounting Group, also known as CIAG, Inc., is an accounting and tax practice based in Petersburg, Illinois. The firm serves individuals and businesses in Menard County, across Illinois, and in other states, with support for clients of different sizes and backgrounds.

The practice helps clients manage accounting, bookkeeping, payroll, and tax needs, including financial statements, accounts payable and receivable, sales tax, tax planning, and IRS notice or audit help. Its work is focused on helping clients understand their financial situation, reporting responsibilities, and applicable rules.

CIAG, Inc. is owned and operated by Randy Atwater, a CPA, with additional staff who have accounting and tax experience. The firm supports individuals, businesses, corporations, trusts, and partnerships through in-person and remote service formats.