Reston, VA CPA

Reston, VA CPA Firm

About Us

Monarch CPA Services is a well-established Reston CPA firm with expertise in all facets of financial management, including taxes, accounting, bookkeeping, QuickBooks, business consulting, and much more. We serve a wide range of both business and individual clients throughout the Reston area, and we’re noted for our strong commitment to integrity and our policy of tailoring our services to the individual needs of each client.


Cara K. Mongelli, CPA (Katie)

We are honored by the trust and confidence our clients place in our advice and oversight. We continue working to earn your trust by staying abreast of accounting and tax law changes and by taking a proactive interest in the smooth financial management of your business.

Katie became a licensed Certified Public Accountant after receiving her Bachelors of Science from Saint Michael's College in Burlington, Vermont. She began Monarch CPA Services in 2005.

Throughout her career, Katie has provided accounting and tax services, business advice, income tax reduction advice and financial management/consulting services for a large number of businesses. She has acquired knowledge and expertise from years of work with every business class from entrepreneurs to large, publicly traded companies with millions of dollars in annual sales and locations in multiple states.

A partial list of client industries includes:

Katie is a member of the Maryland Association of Certified Public Accountants and the Virginia Society of Certified Public Accountants.