Castellon Professional Services

Castellon Professional Services

Castellon Professional Services locationSAN FRANCISCO, CA

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Tax Management Services
At Castellon Professional Services we guide our clients through a full range of tax planning and preparation decisions with strategies that minimize your tax liabilities, maximize your cash flow and keep you on track to your financial goals. Our expertise, experience, analysis and thorough research allow us to optimize financial opportunities to be found in existing as well as recently altered tax laws. We are knowledgeable and up to date on the tax laws and can make sense of your receipts, bills and notices.

Financial and Tax Accounting
Castellon Professional Services provides assistance with financial accounting including set-up of chart of accounts, journal entries, accrual vs. cash accounting, preparation of financial statements, bookkeeping and payroll. We also offer assistance and preparation of ASC 740 tax provision statements for publicly traded companies.

Debt and Finance Advising
Whether your needs are corporate or personal, Castellon Professional Services' professionals can assist you in sorting out the different options available for debt management and financing that will lower your payments and/or reduce the total amount of interest paid. Even if you are able to handle the payments and the amounts of your current debts, our expertise may be able to save you money and/or lower your payments.

IRS Representation
Professional representation can be vital during an audit, and our experience with tax authorities enables us to guide clients in their dealings with federal and state agencies. If you have been chosen for an audit, the professional representation you can find with our firm can put many of your worries at bay. We are ready and willing to answer any and all questions the IRS may be asking of you.

Estate and Trust Planning and Tax Preparation
Effective estate and trust planning can ensure financial security for loved ones. For businesses, it can maintain a smooth succession of ownership. Castellon Professional Services' role is to help you navigate the complex and shifting tax laws to facilitate the transfer of assets and minimize the tax liability of your beneficiaries. Everyone should have a well thought out plan as to how to disburse one's estate so as to avoid complications and to be sure wishes are followed. Having your taxes and estate thoroughly and carefully planned will ensure that your loved ones do not have any complications to deal with during a time of loss.

International Taxation
Our experience with the taxation of U.S companies doing business abroad and residents working abroad as well as foreign corporations doing business in the U.S or foreign citizens working in the U.S., has provided us with an extensive base of knowledge in the area of international taxation.

Cost Segregation
Our experienced staff will assist you with determination of the most advantageous tax positions to claim on capital projects to assure the maximum depreciation and amortization deductions.

Tax Credits and Exemptions
Castellon Professional Services staff has extensive experience with various federal and state tax credits and exemptions such R&D/Orphan Drug Tax Credits and biotech sales tax exemptions. We are able to assist with identification, implementation, calculation and reporting of such tax credits.

Bookkeeping and Payroll Services

Tax Service Fees:
Tax service fees are offered on a project basis or hourly. Project fees are proposed on fixed fee range and hourly fee of $200 per hour.
Financial and Tax Accounting Service Fees:
Financial and tax accounting service fees are offered on a project basis or hourly. Project fees are proposed on fixed fee range and hourly fee of $100 per hour.
Bookkeeping and Payroll Service Fees:
Bookkeeping service fees are offered on an hourly basis of $100 per hour. Includes CPA supervision of full-service bookkeeper.
Payroll service fees are offered on fixed fee plus hourly rate. Fixed fee is $30 plus $10 per employee or contractor per month for online software platform. Hourly fee is $100 for payroll processing.

Languages Spoken

  • 3 hires on
  • 4 hours average response time
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Castellon Professional Services Q&A

Company Q&A

What kind of accounting services do you provide?

Primarily tax accounting including preparing of tax basis financial statements and tax provisions (ASC 740). In addition, Castellon Professional Services provides a full range of tax consulting including entity selection, entity formation, valuation modeling, OPEX modeling, individual income taxation, tax return preparation, IRS audit representation, tax debt management, financial consulting (personal and business), R&D tax credit studies, cost segregation studies, payroll services and consulting and start-up company fund-raising.

Why is it so important for businesses to hire a great accountant?

There are many great accountants - put the right number in the right box - ; however, there are few great business advisors. The importance of hiring a great business advisor with the technical expertise of a CPA, CGMA and MST is the ability to assist you in solving problems ensuring the success of your business.

What do you love most about your job?

Helping my clients succeed in their personal lives and business pursuits.

What inspired you to start your own business?

The opportunity to help others. There are many ways to assist others. I chose to become a CPA to be a trusted advisor.

Why should our clients choose you?

If you are looking for a business advisor to help you solve problems beyond "putting the right number in the right box", appreciate the opportunity to work with you in ensuring your personal and business success.

Castellon Professional Services Certificates


Master's of Science, Taxation

Golden Gate University

August 2018.

Certified Public Accountant

American Institute of Certified Public Accountants (AICPA) and National Association of State Boards of Accountancy (NASBA)

June 2008.

Chartered Global Management Accounting

American Institute of Certified Public Accountants (AICPA) and the Chartered Institute of Management Accountants (CIMA)

June 2012.

  • 3 hires on
  • 4 hours average response time

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