1007 Towne Lake Hills East Woodstock, Georgia 30189

 
770.202.1212
 
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William Costley LLC is a veteran-owned and operated tax and accounting business that provide clients with strategic tax planning, income tax preparation and bookkeeping service packages. Our business-owner clients will quickly discover and appreciate the savings from using us in both financial and time for all their daily bookkeeping needs and tax return preparation. We have over 10+ years of experience with income tax preparation, income tax planning, and bookkeeping. We use industry-leading tax preparation and bookkeeping software provided by Thomson Reuters and Intuit QuickBooks. Our clients will quickly find that we go the extra mile to assist and guide them through their entire financial journey.

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Shana McPhail

William is fantastic! Not only does William provide exceptional service, his newsletters are informative and educate us on life events we will encounter during our lifetime. William is more than a CPA filing our taxes- he’s someone who cares about our well being and is available year round to assist in planning for our future filings.


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Schweers Steven

William did a great job on our 2023 tax return. The process was very convenient as we met for our initial new client meeting and then handled the rest electronically. Very efficient and smooth. We're looking forward to working with William again next year and we recommend anyone looking for a professional, efficient and friendly CPA experience to consider William Costley LLC.


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Warren Mancherian

Excellent explanation of steps to take to prepare for future tax savings. Could not be happier as we are a small business who appreciates how William takes the time to review our situation thoroughly with us.


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Robert Irvine

William Costley LLC was a great help to me as he advised me on tax questions that were complicating my return. This consultation was very very helpful, a full five stars. I pulled up to their office and a parking space was reserved for me with my name on it. When I entered the office on the big screen TV was another personal welcome . Guest services was doing great. William introduced himself and heard my questions and needs. He was proficient in answering all my questions. I could not do my taxes without his help. William was professional and friendly. This is a company I will trust with my taxes and other financial concerns. Thank you.


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Gabe Gilbert

9/11/26

William and his team were very responsive and easy to work with. Thanks for the help!


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Randal Hutchinson

9/03/26

Very professional! We recommend his services and the staff nice too on phone.


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Rick Lowery

9/02/26

I highly recommend Will Costley and his team. I came to Will’s firm after working with a previous accountant and had several issues that needed to be corrected and sorted out. From the beginning, Will and his team were extremely knowledgeable, responsive, and professional. It is a great feeling to have an accounting team I can trust and rely on. I would highly recommend Will and his team to anyone looking for knowledgeable, dependable, and professional accounting services.


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Whitney Robinson

9/01/26

We have had a great experience working with William Costley and his team for both our tax preparation and payroll needs. William has prepared our taxes for the past two years, helped us amend prior-year tax returns, and also handles our payroll.

His team is knowledgeable, professional, responsive, and thorough. Whether we are dealing with annual tax preparation, amended tax returns, payroll, or questions that come up throughout the year, William and his team are always helpful and make the process much easier.

If you are looking for a reliable tax preparer, payroll provider, or tax professional in Woodstock, GA, I highly recommend William Costley. He is a great resource for businesses and individuals needing tax preparation, amended returns, payroll services, and dependable tax guidance in Woodstock and the North Georgia area.

We truly appreciate...

William Costley LLC Replied: Whitney, thank you so much for taking the time to write this — it genuinely means a lot to me and the team. Getting to work with you and David over the past couple of years has been a pleasure, and knowing we've made things easier for you is exactly what we aim for. I'm especially grateful for...
William Costley LLC Replied: Whitney, thank you so much for taking the time to write this — it genuinely means a lot to me and the team. Getting to work with you and David over the past couple of years has been a pleasure, and knowing we've made things easier for you is exactly what we aim for. I'm especially grateful for...

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Alicia Morrissey

7/16/26

Knowlegable and helpful with small business matters


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Amy Martin

7/15/26

William and his staff were thorough, professional, and helpful with my questions and concerns about future tax planning. I highly recommend him.


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1007 Towne Lake Hills East   Woodstock,  Georgia   30189
 
Call Us
 
View Website
 
Contact Us

William Costley LLC is a veteran-owned and operated tax and accounting business that provide clients with strategic tax planning, income tax preparation and bookkeeping service packages. Our business-owner clients will quickly discover and appreciate the savings from using us in both financial and time for all their daily bookkeeping needs and tax return preparation. We have over 10+ years of experience with income tax preparation, income tax planning, and bookkeeping. We use industry-leading tax preparation and bookkeeping software provided by Thomson Reuters and Intuit QuickBooks. Our clients will quickly find that we go the extra mile to assist and guide them through their entire financial journey.

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