WHO WE SERVE · MEDICAL & PROFESSIONAL PRACTICES
Accounting and tax for Ontario medical and professional practices
Practice owners in Ontario, California, can lean on Brent Tucker, CPA, for monthly accounting by phone or video. Census ZIP Code Business Patterns 2023 tallies 50 physician offices with paid employees across the ZIP codes 91761, 91762 and 91764.
Sound familiar?
More owners, more entities, more returns.
As a practice adds partners or separate entities, the filings multiply. The practice’s returns are coordinated with each owner’s return.
You need a clearer view of how the practice is performing.
Monthly statements show what comes in, what it costs to run the practice, and what remains — explained in plain terms.
A major decision is on the horizon.
A new provider, new equipment, a second location. Talk it through with Brent before you commit, with the tax consequences in view.
Your situation isn’t on this list? Tell us about it — every engagement starts with a conversation.
How we help.
Monthly accounting
Current books and financial statements.
Business and owner returns
Prepared together.
Services and starting prices.
- 01
Accounting + Tax + Planning
From $900/moMonthly accounting and reporting, business and owner tax returns, proactive tax planning and year-round CPA access.
Founding Client Rate: $825/month for your first 12 months when you engage by March 31, 2027. Terms
- 02
Monthly Accounting
From $400/moTransaction categorization, account reconciliations, financial statements and regular accounting support.
- 03
Tax Preparation
From $300Individual returns (federal and one state) from $300; business returns from $750.
Starting prices. Your scope and price are agreed in writing before work begins.
Work directly with Brent.
Licensed CPA · 10+ years in public accounting · Member, AICPA and MICPA
Brent has served medical and professional-services clients throughout his career, at a boutique firm and at a large national accounting and advisory firm.
Brent Tucker is a CPA licensed in Michigan and serves clients in other states under applicable CPA mobility provisions.
More about BrentOntario at a glance
50
physician offices with paid employees in the ZIP codes 91761, 91762 and 91764 that serve Ontario
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023
6%
share of physician offices with 10+ employees (estimate)
Source: estimate derived by Tucker from Census ZIP Code Business Patterns 2023; not a published figure
Tax offices for Ontario medical practices
City of Ontario Business License Division
City business tax and licenses.
Phone (909) 395-2022
San Bernardino County Auditor-Controller/Treasurer/Tax Collector (ATC)
County property tax collection.
Phone (909) 387-8322
California Franchise Tax Board (income tax)
State tax and revenue agency.
Phone 800-852-5711
IRS Taxpayer Assistance Center - San Bernardino
Federal tax help in person.
290 N. D St., San Bernardino, CA 92401
Phone (909) 388-8108
Tax planning through the year is part of what Brent offers medical and professional practices in Ontario, San Bernardino County, California, alongside monthly accounting and business and owner returns.
The City of Ontario Business License Division is the city office for local taxes, and San Bernardino County Auditor-Controller/Treasurer/Tax Collector (ATC) collects property tax. California Franchise Tax Board (income tax) is the state listing.
IRS Taxpayer Assistance Center - San Bernardino is the federal listing. Tucker CPA estimates, from Census ZIP Code Business Patterns 2023, that 6% of the physician offices in those ZIP codes have 10+ employees.
Source: each office's official website, checked October 16, 2026.
GET STARTED
Let's talk about your numbers.
Tell us a little about your business or situation, and Brent will reply personally. No office visit needed — meetings are by phone or video, wherever you’re based.
Call 888-762-4370 · Email brent@brenttuckercpa.com · Prefer to pick a time? Book a consultation online