About Us

Delivering the Caliber of Service Business Owners Deserve

We help business owners focus on what they do best, while guiding them improve scalability and profitability.

Owner & Founder

Meet William Costley

My understanding of small business challenges runs deep—I grew up watching my parents struggle with poor financial advice that cost them dearly. Early in my career, I learned my family's experience wasn't unique—many business owners face inadequate guidance or pay unnecessary taxes. That's why I became an Enrolled Agent and founded William Costley LLC with a commitment: every client receives Fortune 500-level strategic thinking and attention. My approach is simple: listen first, strategize second, execute with precision. I've helped clients save tens of thousands in taxes and build wealth they never thought possible. But what I'm most proud of is the trust they place in me—not just with their numbers, but with their family's future.

I'm not just your accountant; I'm your neighbor. My wife Christi and I have called North Georgia home for years. We chose to raise our family here because we believe in this community. I shop at your stores, my kids go to school with yours, and I understand the unique challenges of local business ownership. Whether it's helping a restaurant owner understand tax credits, guiding a construction company through restructuring, or being available when the IRS sends that scary letter, I'm here because this is home. When you work with me, you're getting a neighbor who genuinely cares about your success and understands what it takes to run a business today.

Who We Are

We're Dedicated to Empowering Business Owners

At William Costley LLC, we believe financial clarity leads to informed decision-making that drives real business growth. We're committed to being more than traditional accountants—we're strategic partners who actively contribute to your success through proactive planning, unwavering integrity, and continuous innovation. Our personalized solutions are built on trust, transparency, and a deep understanding of your unique business goals.

An Accounting Service That's Built Different

Proactive Leadership

We anticipate your needs and provide strategic guidance before problems arise. Our clients receive ongoing tax planning and business insights that enable informed decisions throughout the year.

Comprehensive Services

From bookkeeping and payroll to advanced tax strategies and fractional CFO services, we handle every aspect of your financial operations with seamless integration.

Strategic Tax Planning

We analyze your business structure, implement S-Corporation conversions when beneficial, guide retirement plan setups, and develop tax reduction strategies that can save you thousands.

Pristine Financial Management

We maintain your books to the highest standards, ensuring accuracy and real-time visibility into your financial health for better business decisions.

One Team. One Mission. Your Financial Clarity.

Every William Costley LLC team member is committed to the same goal: providing you with sophisticated, forward-thinking tax and financial strategy delivered through genuine partnership. We don't just coordinate our services—we integrate our expertise to ensure every decision supports your long-term success.