Accounting done the right way — close to the client.
Nearly 20 years of experience, working directly for you.
Kim Resso
Founder & Lead Accountant, Ultaxa LLCI started Ultaxa because I believe accounting should be more than just numbers. It's personal and involves people that look to you for solutions and clarity for their businesses and personal matters.
I spent nearly 20 years in accounting before going out on my own. That experience means I've seen a lot of situations — and I know how to handle the complicated ones.
Most of my clients come to me because something wasn't working. Their books have fallen behind, they're using software that doesn't fit their business or it's becoming too expensive, or they only hear from their accountant during tax season. I help solve those problems, but more importantly, I become a long-term partner. My clients don't have to reintroduce themselves or explain their business every year—I already know their story, which allows me to provide proactive advice and personalized service year after year.
A background built over nearly two decades
Controller
Managed accounting engagements across a range of industries including retail, construction, and professional services. Built deep expertise in financial reporting, tax compliance, and client advisory work.
Senior Accountant
Oversaw full-cycle accounting for a mid-sized manufacturing operation. Managed a small accounting team, implemented accounting software improvements, and served as the primary financial liaison to ownership.
Ultaxa, LLC
Founded Ultaxa to serve small businesses directly, with the depth of a firm and the accessibility of an in-house partner. Providing bookkeeping, accounting, payroll, tax services, and software consulting to clients across Northern California.
Small team. Deep expertise.
Two people focused entirely on getting your books right.
Kim Resso
Founder & Lead Accountant
Nearly 20 years of experience. Handles accounting, tax, payroll, and software consulting.
Shelby Resso
Accounting Associate
Handles day-to-day bookkeeping, ensuring accurate and timely records every month.
Ready to work with someone who actually knows your business?
Start with a free 30-minute conversation — no commitment required.
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