Lee’s Summit Accounting Services You Can Trust

Welcome to Abacus Accounting Solutions. We provide large and small businesses with accounting services to maximize utility and customer service while upholding integrity and trust. At Abacus the client is valued above all, as it is our privilege to ensure that our services exceed expectations.

“It is our obligation to serve.”

– Greer Zoller, EA, Owner

small business Accounting Services

Abacus Accounting Solutions – Finance and Accounting Services

Abacus Accounting Solutions emphasizes creating quality, long-lasting relationships.

Our staff understands and prioritizes the wants and needs of a clients’ business while offering quality customer service by curating a personable relationship unique to the client they are working with.

Our company’s founder, Greer Zoller, says it best.

“At Abacus Accounting Solutions, we live and die by the level of our customer service. We promise to bring our “A” game – every day with every customer. It’s at the heart of our brand. It’s our mission.”

Client Focused Accounting Services

Having a relationship with staff entails more than an annual phone call, as we aim to touch base with clients regularly. We want to know who you are as a person, not just a client. While bookkeeping and payroll needs will be discussed thoroughly don’t be afraid to mention your family, plans for vacation, or long-term goals. You are important to us.

At Abacus Accounting Solutions our financial accounting services policies, procedures, and processes will be unique to each client. This is because we understand that every business is different and will have individual needs. To do this, Abacus must stay up to date with how your business operates and any questions or concerns you may have. As a result of our collaboration, our staff can help you work towards your success.

Abacus Accounting Solutions looks forward to speaking with you – a valued customer. Allow us to listen to your business issues, accounting challenges, tax concerns, and even those hopes and dreams. Contact us today for all your accounting needs!

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    All About Greer

    Greer Zoller, EA, is the founder and owner of Abacus Accounting Solutions, located in the Windsor professional building Lee’s Summit, Missouri. Greer earned her Bachelor’s and Master’s degrees in Accounting from the University of Central Missouri and has become an exemplary business professional who values professionalism and trust. She is a resident of Lake Lotawana, Missouri, where she resides with her husband, Brian, and their three daughters. Greer is dedicated to her family, and of course, to Abacus Accounting Solutions with its many satisfied and loyal customers.

    greer abacus accounting solutions

    All About Michelle

    Michelle Clark is the Office Manager and Client Relationship Coordinator at Abacus Accounting Solutions. In 2020, Michelle graduated from UMKC Summa Cum Laude with a Bachelor’s degree in Accounting. She has 8 years of experience in bookkeeping, payroll, sales tax, and income tax preparation. Michelle is dedicated to the people and the numbers as they are her favorite parts of accounting. When faced with a challenge or opportunity, she faces it head on to put everything in balance and create satisfied customers. Outside of accounting Michelle is dedicated to her family and cheering for the Chiefs.

    michelle abacus accounting solutions

    All About Toni

    Toni Moore is the staff bookkeeper at Abacus Accounting Solutions. In 2004, Toni graduated from Avila University with a Bachelor’s degree in Business Administration with an emphasis in Marketing and a minor in Accounting. She has several years of experience in bookkeeping using both QuickBooks Desktop and QuickBooks Online. In addition to her bookkeeping experience, Toni brings to the firm, an amazing attitude, top-notch attention to detail, and superb customer service skills. Outside of accounting Toni is dedicated to her family and cheering for all the local sports.

    All About Tammy

    Tammy Westerhold is the Payroll Clerk at Abacus Accounting Solutions. Tammy’s a lover of music and crafting and has two children and three fur babies at home. When it’s time to explore Kansas City, the Kansas City Zoo and Jack Stack Barbecue are at the top of her list. When she’s not at the office, Tammy has been known to take in Hallmark movies and loves “The Proposal.” And when she needs a little time to relax, Pomme de Terre lake is her go-to spot (Although her ‘if you could travel anywhere in the world’ pick is Ireland!)

    Tammy Westerhold-Payroll Clerk

    All About Jennica

    Jennica Cassity has served as Staff Bookkeeper for Abacus Accounting Solutions since 2023. Jennica has four dogs and enjoys crafting and baking. Her favorite thing to bake at the moment is pretzel bites and she loves spending her spare time with her husband, Jamison, and daughter, Stevie. Jennica and her family enjoy going to the lake and exploring new places to eat in Kansas City. They also love cheering on our Kansas City Chiefs! What Jennica loves most about bookkeeping is seeing all of the pieces come together; it is like solving a puzzle!

    Jennica Cassity


    It is our mission to add value to our clients throughout the year.


    We will strive to get you every deduction you have coming at tax time, and for those deductions to have a positive impact on the success of your business.


    Our ethical standards will always be transparent.


    Integrity is a fundamental element of the accounting profession. We promise to be forthright and candid with your financial information.

    Customer Service

    We have set high standards for the level of customer service we provide.

    Customer Service

    We want to fulfill our promises to you, and that means giving more than you expect. Abacus Accounting will provide excellent customer service – service you can’t find anywhere else.


    You can trust Abacus Accounting Solutions to provide the highest quality services.


    If we make a promise, we’ll keep it. Words are easily said, but we demonstrate our trustworthiness through actions.