Welcome to
Abacus Bookkeeping Services

About Abacus Bookkeeping....


Abacus Bookkeeping Services is a Colorado based bookkeeping service that focuses on the bookkeeping needs of small businesses.  Our aim is to help relieve the burden of bookkeeping tasks allowing you to focus on achieving your business goals.

The owner of Abacus Bookkeeping Services, Denise Pritt, has over 20 years experience, primarily with small businesses.  

QuickBooks ProAdvisor

Experienced Intuit Certified Quickbooks ProAdvisor.  Certified in both Quickbooks Online and Quickbooks Desktop products

I can help

Whether you are looking to have someone take on all aspects of your bookkeeping, clean up your existing books or perform routine bookkeeping maintenance, I can help.


Some of my bookkeeping services follow...

  • General bookkeeping
  • Bank reconciliation
  • A/R management
  • A/P management
  • Payroll processing
  • Payroll tax reporting
  • Sales tax reporting
  • Account cleanup
  • Year end preparation

What my clients have to say....

"Denise has been an amazing help to us. She is efficient, knowledgeable, and on top of our monthly and quarterly needs, including reconciliation, sales tax, payroll, payroll taxes and business taxes. I switched from an accountant with very sub par bookkeeping services, and 

Denise had our books in line very quickly after we switched to her.  I recommend her to anyone who needs professional bookkeeping services." .....  Health Care Service Provider

 "Denise is beyond amazing!!! I couldn’t have asked for better QBO support. She is the best help QBO Support has ever given us. She has spent countless hours helping me fix the payroll profile and W-2 (2018) for S Corp owner. She was able to correct errors that dated back to 2007 on how to set his payroll profile. Her QBO knowledge is phenomenal. I will not hesitate to recommend Denise to anyone, including Accountants and Tax professionals, who need her professional help with bookkeeping and how to navigate QBO.".... Chiropractic Office

 "I'm a small business owner and have used Denise to help solve numerous issues I've experienced throughout the growth of my company. Denise converted my books from Quickbooks Desktop to Quickbooks Online and made things run smoothly and efficiently.  She is very knowledgeable and I highly recommend Abacus Bookkeeping Services"..... Manufacturing Company


Contact Us

Get in Touch

Abacus Bookkeeping Services LLC

4204 Ravenna Pl, Longmont, Colorado 80503, United States

Tel: 720-745-1772