Welcome to Cornerstone Services, CPA

Your success is our business. You can count on our work.

What We Do

Accounting & Bookkeeping

Having accurate financial records is vital to any successful business. By outsourcing your bookkeeping services to us, we can ensure your records will be updated timely, efficiently and accurately freeing you up to help your business grow.

  • Accounts payable (bills and payments)
  • Daily general ledger maintenance)
  • Chart of accounts corrections and clean-up
  • Time tracking & job cost reporting
  • Payroll processing
  • Expense classification
  • Sales and use tax filing
  • Bank accounts reconciliation
  • Credit cards reconciliation
  • Balance sheet generation and review

Advanced Accounting Services

We perform your external Controller / CFO duties. We develop a financial vision that enables you to meet your daily business operation needs, achieve your goals and make better decisions.

  • Budgeting & Forecasting
  • Financial statements & custom reporting
  • Income and business expense analysis
  • Oversee the execution of the financial plan and ongoing accounting process
  • Management Consulting
  • Inventory management
  • Fixed assets management
  • Perform reviews to internal accounting procedures and ensure compliance with auditing procedures
  • Credit cards reconciliation
  • Tax & Audit support

Tax & Consulting

We are knowledgeable in all tax areas. We handle the needs of individuals, small businesses, corporations, partnerships and limited liability companies. We also handle Gift and Estate Tax Return Preparation. we regularly evaluate the best methods to minimize your tax liability. We want to make sure that you take advantage of the tax incentives that apply to your specific situation.

  • Individual income tax preparation
  • Business income tax preparation
  • Estate & Trust tax preparation
  • Nonprofit organizations tax preparation
  • Sales tax return preparation

Who We Are

Cornerstone Services, CPA provides professional accounting, bookkeeping and tax services for individuals and small businesses. Our goal is to provide solutions, guidance and support to clients to help them to succeed and to reach to their best interest.

Nivine Sidhom, CPA

I am a Certified Public Accountant with over 16 years of experience in accounting, bookkeeping, business consulting and taxation. I decided to dedicate my experience to assist small, mid-size businesses and individuals to reach their financial goal. I take my time to research each client situation and provide them quality service with high integrity. I am determined to work hard to earn my clients loyalty every day.

Contact Us

Please use one of the following methods to get in touch with us. or schedule an appointment for a free first time consultation

  • Phone: (626) 497-5445

  • Fax: (661) 417-0045

  • email: nivine@cornerstoneservicescpa.com

  • Facebook: facebook.com/cornerstoneservicescpa

  • Hours:
    Monday - Friday 8 a.m. - 5 p.m. PST
    Saturday: 8 a.m. - 2 p.m.