Tax and Accounting
Services for
Businesses, Estates and Trusts

We have yet to meet a business owner who is not under constant pressure to increase cash flow, reduce costs and operate more efficiently. Without constant attention, accurate data, meticulous reporting and deep knowledge of tax and accounting best practices, it’s easy to leave money on the table.

Diane E. Cahill, CPA PC helps small to midsize businesses, closely held/privately owned businesses and nonprofits keep their financial house in order on an ongoing, temporary or as-needed basis. We provide business tax and accounting services to companies in a wide range of industries- from law firms and real estate offices to contractors and condo associations. Thanks to modern technology, we’re able to work with businesses all over the country.


Income Tax Preparation

This is not an annual event. We stay in touch with our clients throughout the year to make sure you’re taking advantage of all available tax deductions and maintaining all necessary records. We also help you avoid accidental tax underpayment and the penalties and interest that come with it.

Accounting and Bookkeeping

Wouldn’t you rather focus on running and growing your business than day-to-day bookkeeping tasks such as bank reconciliations, tax reporting and filings, sales tax and credit card management? We can set up and manage your systems, processes and monthly reports so you have a clear understanding of your organization’s financial health.


Want us to help you set up QuickBooks and configure everything so you can manage it yourself? Want us to take everything related to QuickBooks off your plate? Want to input data yourself on a day-to-day basis while we handle bank reconciliations and provide monthly reviews? Our firm offers the flexibility to customize QuickBook services according to your specific needs and preferences.

We want to do more than prepare your tax returns. We want to be a strategic business partner and help you become more successful and profitable. Our year-round consulting services and analysis of comparative financial statements help you understand and manage the financial side of your business.

Budget Planning and Business Guidance


Contact Us Today To Find Out How We Can Help You Control Costs and Apply Tax and Accounting Best Practices to Run Your Business More Efficiently.


Diane E. Cahill, CPA PC small business clients include but are not limited to: