We are here for all of your QuickBooks, Bookkeeping, Consulting, Cash Flow Management, Payroll and Human Resources needs.


To assist our clients in making sense out of chaos. To provide a resource of high quality financial professionals who can meet our clients’ needs. Integrity above all. Respect for the expertise of our clients and the knowledge of our staff.


What sets us apart is the relationship we build with our clients. Because they trust us with their most personal information we respect and protect that trust. We are onsite with our clients on a regular basis and work closely with the owners and their staff to improve cash flow.


We will meet with you to assist you in defining what your accounting needs are. Payroll? Month End Close and Review? Pay bills? Training? Human Resources and staff management? Sometimes you just don’t know where to start, or how to move forward. Let us help you figure that out.

What People Are Saying

We Looked at 46 Accountants serving Rancho Cucamonga and Picked the Top 10. We scored accountants on more than 25 variables across five categories, and analysed the results to give you a hand-picked list of the best accountants in Rancho Cucamonga, CA. 1. Reputation A history of delighted customers and outstanding service. 2. Credibility Building customer confidence with licensing, accreditations, and awards. 3. Experience Masters of their craft, based on years of practical experience and education. 4. Availability Consistently approachable and responsive, so customers never feel ignored. 5. Professionalism Providing service with honesty, reliability, and respect.

When I met Heather with Hharpp Accounting Services in 2011, our company was in desperate need of organization.  Like Mary Poppins, she swept in and took care of every thing.  She set us up on QuickBooks, organized our customers and jobs, and made sense out of the chaos.  Hharpp Accounting continues to work with us to keep our jobs and books organized. Dec. 20, 2016 Cathy DeHart – Dehart Construction Services. http://www.dehartconstructionservices.com

“HHARP Accounting has been a tremendous partner for our organization! They save me innumerable hours of “do it yourself” frustration and also assist in training our staff to function more efficiently. Choosing HHARP for our bookkeeping has been one of the best decisions our Board of Directors has made to make me more effective as a leader.” Jan. 05, 2017  Brad Letner President/CEO  HesperiaChamber  

“When I hired Heather Potvin, my old book keeper had quit in the middle of a complete computer program conversion.  Things were quite a mess to say the least.
She methodically, step by step got my conversion done and things back up to speed with the correct information I demanded.  Heather fixed my books in a timely manner with a pleasant disposition. I would not hesitate to recommend Heather for any project.” June 15, 2010 Pete Vetrano, President – Motoman Distributing – Upland, CA

“Heather is one amazing Bookkeeper and accountant. You just can’t make up for the kinds of hands on experience and training she has, Heather brings more than 20 years of accounting experience with the Canadian government and another 10 years of experience in the construction industry. Heather has become a specialist in construction cost accounting. This is one of the more difficult areas in bookkeeping and accounting and it is so important, you cannot leave it to chance.” William J Osgood – CFR & Associates May 24, 2010

I can’t say enough about Heather Potvin. She is amazing at what she does. Heather takes the time to understand the individualized needs of your business and helps provide an organized plan for your finances. I have found Heather to be very organized and detail oriented. She is quick to respond, helpful, and gets things done in a timely manner. Most importantly, Heather is patient when I have questions and is truly a pleasure to work with. SimpleTech March 16, 2022.

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