Business Details
Trusted Accounting and Tax Services in Isle of Palms, SC
We are a customer-oriented accounting firm dedicated to delivering personalized financial solutions to both local and national clients. With decades of combined experience in diverse industries including construction, restaurant management, manufacturing, and distribution, our team brings real-world expertise to every client engagement. Our approach prioritizes understanding your unique financial situation to maximize savings through strategic tax planning and compliance. We specialize in navigating complex tax laws, preparing individual and business returns, and providing actionable business advisory services grounded in practical industry knowledge.Our commitment extends beyond numberswe educate clients on financial statements, ensure IRS guideline compliance, and offer payroll services tailored to our accounting clients' needs. By blending technical proficiency with hands-on business experience, we empower professionals and self-employed individuals to achieve financial clarity and long-term prosperity.
Services
Tax Preparation
Accounting
Business Advising
Payroll Services
Financial Statements
Highlights and features
- We combine 24+ years of accounting expertise with real-world business experience across multiple industries.
- Our team provides personalized tax planning strategies tailored to complex financial situations.
- We offer actionable business advisory services informed by hands-on operational experience.
- Our approach emphasizes financial education to help clients understand their business health.
- We maintain compliance with IRS guidelines while optimizing tax-saving opportunities.
Services
Tax Preparation
We prepare individual and business tax returns for all states and entities, including complex cases involving trusts, high-income earners, and partnerships. Our team stays current with tax law changes to optimize savings and ensure compliance. We specialize in addressing complicated tax issues while providing clear explanations of filing requirements and potential consequences.
Business Advising
Leveraging decades of operational experience in construction, restaurant management, and manufacturing, we provide strategic business advice tailored to your industry. Our services include financial planning, compliance guidance, and operational recommendations to enhance profitability and long-term sustainability for professionals and self-employed individuals.
Accounting
We offer comprehensive accounting services including financial statement preparation and bookkeeping. Our approach goes beyond number-crunching by teaching clients to interpret financial data effectively. We maintain accurate records and ensure proper financial tracking to support informed business decisions and regulatory compliance.
Payroll Services
Our payroll solutions ensure IRS guideline compliance for business owners requiring officer compensation structures. We handle payroll tax filings, W-2/W-3 preparation, and determine appropriate payment amounts. These services are primarily integrated with our tax and bookkeeping clients for seamless financial management.
Financial Statements
We prepare detailed financial statements while emphasizing client education about their business financial health. Our services include balance sheets, income statements, and cash flow analysis presented with clear explanations to help business owners make data-driven decisions and understand their financial position.
People
Glenn Thornburg
CPA
With 24 years in accounting and 25 years as a self-employed business owner across multiple industries, Glenn provides expert tax and business advisory services grounded in practical experience.
Carrie Reilly
CPA
A former restaurant management professional with 10+ years in the industry, Carrie specializes in tax consulting for self-employed individuals and manages our internal accounting operations.
Christy Case
Office Manager
Christy oversees Columbia office operations, client scheduling, return tracking, and coordinates e-filing processes for all office locations and clients.
Lily Beach
Team member contributing to client service and operational support across multiple office locations.
Sarah Beth Irby
Professional team member providing support services to ensure efficient client operations and service delivery.
Questions
What tax services do you offer for businesses?
We prepare returns for all business entities including Sub S Corps, C Corps, partnerships, and sole proprietors, with expertise in complex tax situations and compliance requirements.
Do you handle multi-state tax filings?
Yes, we prepare tax returns for all 50 states and municipalities, including local city taxes and investment-related filings.
What accounting services are included?
Our services include bookkeeping, financial statement preparation, payroll processing, and IRS guideline compliance for business owners requiring structured compensation.
How do you help with tax planning?
We analyze your financial situation, track tax law changes, and provide strategic planning to minimize liabilities while explaining tax consequences of business decisions.
What industries do you specialize in?
Our team has extensive experience in construction, restaurant management, manufacturing, and distribution industries through both accounting practice and operational ownership.
Where are your offices located?
We have three locations: Isle of Palms, SC (main office), Columbia, SC, and Atlanta, GA, serving clients nationwide.
Reviews (2)
Kathleen Murphy
Jan 11, 2026
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Best tax services Ive ever received. Federal and multiple state returns were handled and filed smoothly.
Warning
Sep 20, 2025
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I trusted Thornburg & Reilly CPA with my accounting, and it has been one of the most disappointing and damaging professional experiences Ive ever had. I hired them expecting accuracy, transparency, and basic accountability. Instead, I was left with repeated errors in my tax filings, unnecessary complications with the IRS, and thousands of dollars tied up because of their mishandling. Despite providing all requested documents on time, deadlines were missed and filings were either incorrect or never completed. Whats worse, communication was evasive, dismissive, and unprofessional.
When I asked direct questions or pushed for accountability, I was brushed off rather than given solutions. Instead of resolving problems, I was left to clean up their mistakes on my own. My credit card company has already had to intervene on charges I disputed because I was billed for services that were either never delivered or done improperly. It should never come to that with a licensed accounting firm.
A CPA firms job is to protect clients from financial harm, not create it. As a consumer, I strongly caution anyone considering Thornburg & Reilly CPA to think twice before trusting them with sensitive financial matters. Tax and accounting services require precision, integrity, and professionalismnone of which I experienced here. The stress and financial impact of their negligence has been significant, and I believe the public deserves to be warned.
When I asked direct questions or pushed for accountability, I was brushed off rather than given solutions. Instead of resolving problems, I was left to clean up their mistakes on my own. My credit card company has already had to intervene on charges I disputed because I was billed for services that were either never delivered or done improperly. It should never come to that with a licensed accounting firm.
A CPA firms job is to protect clients from financial harm, not create it. As a consumer, I strongly caution anyone considering Thornburg & Reilly CPA to think twice before trusting them with sensitive financial matters. Tax and accounting services require precision, integrity, and professionalismnone of which I experienced here. The stress and financial impact of their negligence has been significant, and I believe the public deserves to be warned.