About Us

We're Here to Help Your Business Thrive

We exist to help your dream of a thriving business come true, guiding you toward more scalability and profitability while you focus on what you do best.

Owner & Founder

Meet William A. Costley, Jr., EA

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 Strategic Partners, Not Just Accountants

At William Costley LLC, we believe small businesses deserve more than compliance work and once-a-year tax appointments. We're strategic partners who work alongside you year-round — handling your bookkeeping, tax planning, and accounting backend while helping you build a more scalable and profitable business.

Our Core Values

The Values That Guide Us

These aren't marketing words. They're the principles we built this firm on, and the standard every client relationship is held to.

Trustworthy

We pursue our clients' best interests above all else. Honest accounting isn't a policy here. It's the foundation.

Pursuing Mastery

We never settle for good enough. Our team is in constant pursuit of mastery so your business gets expert-level guidance.

Taking Ownership

We don't wait to be asked. We identify problems, find solutions, and bridge gaps because your success is our responsibility.

Loving One's Neighbor as Themself

We treat your business the way we'd want ours treated, with patience, care, and genuine investment in your success.

One Team. One Mission. Your Business Transformed.

Every William Costley LLC team member is committed to the same goal: to help small businesses transform into more scalable and more profitable organizations.

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.