About Belt Accounting & Tax


We love label makers, color-coded files, and all things organization. Systems and spreadsheets are our friends. And a strategic conversation about your future and your financials is our favorite lunchtime topic. It’s a balanced approach to the big picture things and the ever so important details.

At Belt Accounting & Tax, we’ve designed this “accounting engine” with a focus on access, accuracy and affordability, and of course, saving you time. Whether you are simply seeking a “tax home” or are intrigued about our Flat Rate Small Business Advisory Packages, look to our team as your local partner in accounting and tax.

The Belt Accounting team


One thing you will notice about Belt Accounting & Tax is our commitment to the local community. Education, involvement, ongoing partnerships, and relationships are values we are extremely passionate about. You will likely see us out and about at events and programs through the following organizations:

  • Brookfield Chamber of Commerce
  • Delafield Chamber of Commerce
  • Metropolitan Builders Association
  • Pewaukee Chamber of Commerce
  • Waukesha County Business Alliance


Educating Our Team to Better Serve You!

In order to stay informed and educated on current tax laws and accounting practices, our team members are required to receive ongoing training on a wide range of topics. Our team earns a minimum of 40 hours of continuing professional education (CPE) credits each year with the ultimate goal of staying educated on pertinent information and improving our ability to serve you, our client! From the areas of accounting and taxation to business management, administration, and ethics, our team earns continuing professional education credits from the following sources:

  • National Association of Tax Professionals (NATP)
  • Thomas Reuters – Tax Software Training
  • Intuit – QuickBooks Training


Work. Life. Balanced. What does that mean to us? It means that the long hours of tax season are perfectly complemented by the friendships we form with our clients. It means that answering that weekend email is offset by the trust and responsiveness that is built in doing so. It means that we work hard, and then we play hard. That’s what our team is all about. We invite you to get to know more about the Belt Accounting & Tax team, your partners in small business financial success!


  • kellibelt@belt-accounting.com

Kelli Belt - Owner

Kelli has been in the financial services industry for over 10 years, working in public and private accounting. Missing the excitement of business ownership and working with small businesses, she started Belt Accounting & Tax in 2014. Her primary focus areas include business tax preparation, tax planning, and business and tax advising.

Through community involvement, networking, and teaching Kelli goes beyond the norm by connecting with people, building trust, and educating her clients and prospective clients. Kelli is a person who “gets things done” through teamwork, partnerships, and relationships. With a passion and enthusiasm, she loves meeting new people and helping clients succeed in new ways.

In her free time, she enjoys spending time outdoors with her husband and daughter. Whether it’s a trip to the Wisconsin Dells, skiing during the winter, or being out on the boat in the summer, it’s all about relaxing with friends and family.


  • Certified Public Accountant (CPA)
  • QuickBooks Pro Advisor


  • National Association of Tax Professionals (NATP)
  • Metropolitan Builders Association, Associate Advisory Board Member
  • Brookfield Chamber of Commerce
  • MBA Finance Committee Co-Chair


  • karialonso@belt-accounting.com

Kari Alonso - Accountant

Kari has been with Belt Accounting & Tax since it was founded in 2014, primarily working with our business clients. She excels at helping business owners create long-term, strategic goals, as well as managing their account reconciliations, payables, receivables, monthly reports, and sales tax reporting. Kari also assists with our personal accounting services, helping families and individuals with tax return preparation, filing, and retirement tax planning.

When Kari isn’t balancing checkbooks or preparing tax returns, she is spending time with her family and tending to her beautiful garden and flower beds.


  • Certified Public Accountant (CPA)
  • QuickBooks ProAdvisors (Online & Desktop)


  • pattimaynard@belt-accounting.com

Patti Maynard - Accountant

Patti joined Belt Accounting & Tax in 2014 after working with her daughter Kelli at Maynard & Belt Certified Public Accountants for over six years. Her primary focus with Belt Accounting & Tax is on business and personal tax planning and preparation. She has worked with small and medium-sized business throughout her career and loves interacting with her clients and helping them solve all their tax needs.

In addition to her work with Belt, Patti served as an Accounting Instructor at Waukesha County Technical College for over 25 years and is an active member of the Brookfield Chamber of Commerce.

Outside of work, Patti spends time her time with family and friends and enjoys taking care of her grandkids. In the summer, you can find her on Pewaukee Lake boating, paddle boarding, kayaking, or floating.


  • Certified Public Accountant (CPA)


  • Brookfield Chamber of Commerce


  • kellyparkhill@belt-accounting.com

Kelly Parkhill - Accounting Manager

Belt Accounting’s designated “Excel Guru” joined the team full-time in 2019 and helps clients in several capacities including business accounting, tax, and payroll services. Kelly helps business owners evaluate, implement, and execute on their strategic plans and financial goals, as well as help assist families and individuals with tax return preparation, filing, and retirement tax planning. Her one piece of advice for those in need of accounting help, “just like Google is not a replacement for a doctor, neither is it a replacement for a GOOD accountant!”

In her free time, she enjoys spending time with her two adult kids, traveling all over (most recently to Thailand), doing puzzles, and reading a good book. Kelly is also passionate about saving dogs by helping to rescue and raise dogs in need of a home.


  • Certified Public Accountant (CPA)


  • richmueller@belt-accounting.com

Rich Mueller - Accounting Manager

Rich has more than 40 years of accounting experience, 20 of which he spent running his own accounting firm. He primarily focuses on the business side of accounting and tax preparation, helping small business clients balance and reconcile accounts, manage cash flow, process payroll, and file tax returns among many other responsibilities. Partnering with local Wisconsin businesses, consulting with clients, and making a difference in their business are just a few of the reasons Rich loves being an accountant.

His hobbies include attending his children’s sporting events, following the state’s biggest sports teams, the Packers, Bucks, and Brewers, as well as any type of travel that you can imagine!


  • Public Accountant-Associate Degree WCTC
  • Accredited Business Accountant (ABA)


  • Wisconsin Association of Accountants – Member


  • janeflammang@belt-accounting.com

Jane Flammang - Accountant

Jane joined the Belt Accounting team in 2017. Her primary focuses are on managing payroll, bookkeeping, and preparing individual and corporate tax returns. She loves working with clients, helping them tackle any challenges that come their way. Her favorite part about coming to work every day is being surrounded by a team of hardworking individuals.

Outside of the office, she loves spending time with her family and helping volunteer at her daughter’s school. After the busy tax season ends, you’ll find Jane working on her yard and planting her garden in preparation for Spring and Summer.


  • Master of Business Administration (MBA)


  • lesliemillane@belt-accounting.com

Leslie Fisher-Millane - Administrative Assistant & Client Services

Leslie began working at Belt Accounting in 2015, primarily helping out during tax season. Now, as a full-time team member, her primary roles are Administrative Supervisor and HR. Leslie has been instrumental in helping develop a wonderful working environment at Belt Accounting, making it a joy for the entire team to come to work each and every day.

One of the first things you’ll learn quickly after meeting Leslie is her love of the Green Bay Packers. She never misses a game on television and always reps the green and gold wherever she goes! Outside of her work life, she loves traveling the U.S. and party planning for family and friends.


Rustler - Client Greeter

Our friendly Yellow Lab, Rustler has become a favorite employee for many of our clients. His primary responsibilities consist of greeting clients as they walk in the office, helping boost employee morale during the busy tax season, and napping during important client meetings.

When not entertaining clients at the office, Rustler loves visiting doggy daycare, playing fetch with his family, and being on the lake during the summer.


  • Certified Client Greeter


  • American Kennel Club