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Business Details
50+ Years
experience
Your Trusted Partner for Accounting, Tax, and Advisory Solutions
Founded in 1956, Thompson Greenspon has established itself as a leading CPA firm headquartered in Virginia, delivering industry-leading expertise in tax, audit, accounting, and advisory services. Our team of seasoned professionals, including over 70% CPAs, specializes in serving government contracting, nonprofit, construction, and professional services industries. We combine the resources of a nationally recognized firm with personalized attention, ensuring clients receive tailored solutions aligned with their unique goals. Our strategic mission focuses on proactive, industry-focused services to drive sustainable growth for clients and team members alike.

With affiliations like CPAmerica and Crowe Global, we provide access to global resources while maintaining local community commitment. Our history of high client satisfaction scores and recognition as a Top 400 firm underscores our dedication to excellence. We prioritize understanding client needs to deliver accurate advice, prompt service, and long-term partnership, ensuring businesses and individuals navigate complex financial landscapes with confidence.
Services
Tax Services IRS Representation Estate Planning Cost Segregation Bank Financing Internal Controls Lease Accounting Succession Planning Employee Retention Tax Credit Paycheck Protection Program
Details
  • Year established: 1956
Highlights and features
  • We offer over 65 years of experience in accounting and tax services.
  • Our team includes 70% CPAs, exceeding industry expertise standards.
  • Recognized as a Top 400 firm with national and regional accolades.
  • Specialized expertise in government contracting and nonprofit sectors.
  • Affiliated with CPAmerica and Crowe Global for expanded resources.
What people say
Long-term reliability Prompt service Accurate advice Confidence in expertise
Services
Tax Services
Our tax services focus on strategic planning to minimize liabilities while maximizing savings. We assist individuals, businesses, and nonprofits with compliance, deductions, and credit optimization. With proactive guidance, we ensure clients navigate complex tax regulations confidently, leveraging decades of expertise to deliver tailored solutions that align with financial goals.
IRS Representation
IRS Representation services provide expert assistance during audits, payment plan negotiations, and dispute resolutions. Our CPAs, with over 75 combined years of IRS experience, ensure compliance and favorable outcomes. We handle communication and documentation, reducing client stress while safeguarding financial interests through proven strategies.
Estate Planning
Estate Planning services help clients secure their legacy through tax-efficient strategies. We collaborate with legal professionals to create customized plans that minimize estate taxes, ensure business continuity, and meet familial needs. Regular reviews keep plans aligned with evolving regulations and personal circumstances.
Cost Segregation
Cost Segregation studies accelerate depreciation deductions for real estate owners. By identifying overlooked assets, we maximize immediate tax savings while complying with regulations. This strategy benefits new constructions and existing properties, enhancing cash flow through deferred tax liabilities and increased deductions.
Internal Controls
Internal Controls assessments evaluate financial reporting accuracy and operational efficiency. We analyze risk assessment, control environments, and monitoring processes, providing actionable recommendations to mitigate fraud risks and enhance compliance. Strengthening controls ensures regulatory adherence and fosters long-term business stability.
People
Andrew T. Henderson
CPA
Andrew T. Henderson, CPA, brings extensive accounting expertise to Thompson Greenspon, specializing in client-focused financial solutions.
Carolyn C. Quill
CPA, JD, LL.M.
Carolyn C. Quill combines legal and accounting expertise to provide comprehensive tax and advisory services to clients.
Charles F. Helme III
CPA, CGMA
Charles F. Helme III offers strategic financial guidance with a focus on government contracting and nonprofit sectors.
Eric S. Fletcher
CPA
Eric S. Fletcher delivers tailored accounting solutions, emphasizing audit and tax compliance for diverse industries.
Gray K. Coyner
CPA
Gray K. Coyner specializes in financial reporting and assurance services, ensuring clients meet regulatory standards.
Questions
What accounting services does Thompson Greenspon offer?
We provide tax planning, audits, financial reporting, internal controls, and advisory services for businesses and individuals.
Do you specialize in specific industries?
Yes, we focus on government contracting, nonprofit organizations, construction, and professional services sectors.
How can you assist with IRS audits?
Our CPAs with 75+ years of IRS experience handle audit representation, payment plans, and dispute resolution.
What locations do you serve?
We primarily serve Fairfax, VA, and the Metro DC area, with nationwide client support.
Are financing options available for services?
We do not offer financing but provide transparent pricing for all accounting and advisory services.
Reviews (3)
Ira Soleman
Jun 13, 2019 Report
I used to use T&G few years back and changed when they closed their manassas office. They did a great job for me and my businesses and I am seriously considering leaving CST in favor of T&G.
Kevin Ward
May 24, 2019 Report
I used this firm for my business and personal tax returns. They are knowledgeable about the new tax changes in 2018. Even though my business is small they are responsive and I feel like an important client. Their initial estimate did match the final bill. For piece of mind and confidence they are a good investment. As a small business owner I would highly recommend.
John-Paul Gilson
May 21, 2019 Report
Be aware. They ask for large retainers and deposits before doing any work. Then the send "past due notices" without sending bills or invoices. They never explain or show the "work" done or "time spent". Be careful when dealing these folks.