Auditor-Controller Treasurer-Tax Collector Department




The ACTTC's Administration division handles a variety of tasks that support the department head and service divisions. The Administration Division is managed by Tasha Houweling, Administrative Services Officer, who can be reached at



The County of Sonoma Auditor-Controller-Treasurer-Tax Collector's Audit Division site hosts reports for audited entities and programs. An division-prepared schedule of special district audits is available on the Special District Roster website.


Client Accounting

The Client Accounting Division provides specific accounting services and administrative support to various county departments, local districts, and other governmental entities on a contractual basis.


General Accounting

The Accounting Division provides accounting support for all General Services Divisions. Its responsibilities include processing payroll, accounts payable, accounts receivable and the preparation of financial reports for the General Services Department.


Investment and Debt

The Investment and Debt division is responsible for the daily management of the treasury pooled investment fund portfolio of approximately $2.4 billion, manages the county debt program, and provides services for the employee deferred compensation program.



The Payroll Division of the ACTTC provides biweekly payroll processing for all 27 County Departments and 5 Special Districts/Agencies. The Payroll Division ensures compliance with Federal, State, and Local laws & regulations and compliance of all 11 Memorandums of Understandings and the Salary Resolution.


Property Tax Accounting Division

The Property Tax Accounting Division allocates collected property taxes to the County of Sonoma's various recipient districts, agencies, and schools.


Revenue Accounting

The Revenue Accounting division is responsible for the billing, collection, and processing of Secured, Supplemental, and Unsecured property taxes for the County. Approximately 178,000 Secured annual tax bills; 30,000 Supplemental tax bills; and 22,000 Unsecured tax bills are issued and processed each year.



The Treasury Division is responsible for the safekeeping of funds for the County, School Districts, and Special Districts. The Treasury oversees all banking operations for the County and its departments and is the paying agent for all debt and Special Assessments. The Treasury is also responsible for the allocation of over $20 million in interest earnings annually.


Accessibility Assistance

The County of Sonoma is committed to improving access to County programs and services and to providing accommodation to individuals with disabilities as required under state and federal law, including the Americans with Disabilities Act. The County of Sonoma uses the Section 508 standards and WCAG 2.1, Level AA as guidelines for pages within our website.