Partnering With You for Your Success

Your success is our goal.  At Thompson Greenspon we offer award-winning service and pro-active solutions, customized to meet your specific tax, audit, accounting and consulting needs.

Personal relationships are important to us. Since our founding in 1956, the firm has advanced the goal of having you work with the same dedicated team members year after year.  As one of the largest CPA firms in the DC metro area, we deliver industry-leading expertise that is competitive with national and regional firms.

2018-19 Tax Planning Guide

The 2018-2019 Tax Planning Guide is here.

Thompson Greenspon’s Tax Planning Guide for 2018-2019 is designed to help you save the most by becoming familiar with the recent changes to the law and make sure you’re taking advantage of every tax break you’re entitled to.  Check it out now and start saving.

Industries we have specialized in since 1956:

Whether you need estate or succession planning, or accounting, auditing, or tax assistance, Thompson Greenspon can help you succeed.

Whether you are looking for assistance with your overhead rate, an audit of your financial statement, or with day-to-day accounting services, we can assist you.

While you focus on supporting your mission, let our tax advice and creative solutions help you achieve your financial goals. 

When you need help with tax or business planning, draw on our decades of expertise. While you serve your clients or patients, we will take care of your needs.

Click below to be put in touch with a CPA who specializes in your industry.

Our Services Include:
TAXES

Tax Center

Planning ahead and saving you money on income taxes, trust and estates, payroll, and more.

View our Tax Services ›

FINANCES

Financial Reporting & Assurance

Offering a wide range of assurance services, audits and business assistance.

See How We Help ›

CONSULTATION

Advisory Services

Expert guidance when you start a business, sharpen your strategic plan, or plan for succession.

Browse our Services ›

ACCOUNTING

Outsourced Accounting

Focus on your big goals, not your bookkeeping. Don’t think twice about payroll, taxes, financials, and more.

View our Accounting Solutions ›

EMPLOYEE BENEFITS

Employee Benefits Planning & Audits

By listening closely to your needs, we can help you ensure you have a solid plan in place and assist you by auditing your plan to meet regulatory requirements.

Discover How We Can Serve Your Organization ›

Industry Insights:
audit opinions

Audit Opinions: How Your Financial Statements Measure Up

Audit opinions differ depending on the information available, financial viability, errors discovered during audit procedures and other limiting factors. The type of opinion your auditor issues tells stakeholders whether you’re in compliance with accounting rules and likely to continue operating as a going concern. The basics To find out what type of audit opinion you’ve…

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Is it Time for a Change?
Tax reform has expanded availability of accounting methods Almost a year ago, the Tax Cuts and Jobs Act (TCJA) was signed into law. It may be best known for slashing...
2018 Q4 Tax Calendar: Key Deadlines for Businesses and Other Employers
Here are some of the key tax-related deadlines affecting businesses and other employers during the fourth quarter of 2018. Keep in mind that this list isn’t all-inclusive, so there may...
Time and Materials Contracts: Improper Labor Classification is Risky
Improper labor category classification under U.S. government time and materials (T&M) contracts can result in cost disallowance, investigation, fines -- and even jail time. (more…)
We are proud recipients of the following awards and recognitions: