Hamilton & Associates CPA LLC (Formerly On-Site Accounting)

Hamilton & Associates CPA LLC is a full-service accounting firm in Plant City, Florida, providing tax planning, attestation services, accounting, payroll, and tax services to individuals and businesses. The firm serves clients throughout Hillsborough County, with a focus on building long-term financial relationships that support clients across generations. Founded by Lizzette Sarria, who has operated her accounting practice in Plant City for 25 years, the firm merged with Hamilton & Associates CPA LLC in October 2025, bringing decades of local experience and expertise. The firm maintains a 5.00 rating based on customer reviews, reflecting strong client satisfaction and trust.

The firm emphasizes a collaborative approach to financial planning, centered on clear communication and strategic guidance. Its team includes licensed CPAs, EA partners, and specialized managers who support clients in tax planning, financial reporting, and charitable giving. Services are designed to help clients reduce tax liabilities through proactive, professional strategies while ensuring compliance with regulatory standards. The firm’s philosophy prioritizes sustainable financial outcomes over tax avoidance, helping clients make informed decisions that benefit them and their families over time.

Located at 304 E Baker St, Suite D, the firm sits just a short distance from the Plant City Courthouse and Hillsborough County Sheriff's Office Plant City Substation, both approximately 0.1 miles away. It is situated on E Baker Street, near Reynolds Street and North Collins Street, placing it in the heart of the city’s central business district.

With a strong local presence and a reputation for reliability and client-focused service, Hamilton & Associates CPA LLC stands as a trusted financial partner for individuals and businesses in Plant City and surrounding areas. The firm’s deep roots in the community and commitment to lasting client relationships underscore its role as a dependable resource in local financial planning.