Clean books. Clear picture. Confident decisions.
Kellcat builds financial systems and accounting architecture for real estate investors, growing businesses, and tech-enabled startups — from starter kits and monthly bookkeeping to full dashboard and advisory work.
Whatever stage you are at, the goal is the same: clean numbers, a clear picture of your business, and the confidence to make your next decision without guessing.
You are not bad with money.
You just do not have a system.
Most business owners we work with are smart, capable, and working hard. The problem is not effort. The problem is that the financial setup has not caught up to the business they have built.
This is not a knowledge problem. It is a systems problem.
And that is exactly what Kellcat is built to solve.
Built by an engineer.
Inspired by a CPA.
Kellcat was founded by Brian Kelly, an aerospace software engineer who has spent 11 years building software where precision is not a preference. It is the job.
Long before that engineering career, Brian watched his mother spend 30 years as a CPA, sitting across the table from business owners and helping them understand what their numbers were actually saying. She did not just prepare returns. She helped people see their businesses clearly.
Kellcat exists at the intersection of those two worlds. Engineering-grade precision meets real-world financial guidance. The result is a financial back office built for clarity, not complexity — designed by someone who understands both the systems and the people they serve.
We build financial systems in three layers.
Each layer depends on the one before it. Together, they move you from books that are simply correct, to numbers you can see clearly, to decisions you can make with confidence.
The numbers cannot drive decisions until they are visible.
They cannot be visible until they are right.
Not sure where you fit yet? Start with a conversation.
The fastest way to know if Kellcat is the right fit is to talk through where you are, where you want to go, and what kind of support would actually help.
Fix & Flip Kit — real profit on every deal.
LTR Kit — per-property tracking without the spreadsheet cleanup.
Also available for BRRRR and home bakery.
Real estate investors, small business owners,
and the people building both.
Kellcat works with business owners across a range of industries, with a specialty in the financial systems that real estate investors and small operators actually need.
If your business does not fit neatly into one category, that is fine. Book a Discovery Call and Brian will help you determine whether Kellcat is the right fit.
What clients are saying.
All reviews from QuickBooks ProAdvisor and Google — unedited.
My books were a complete disaster. Brian from Kellcat helped me clean them up and also showed me which metrics I should be tracking. His knowledge of QuickBooks blew my mind. He showed me stuff I didn't even know was possible. I would highly recommend working with him.
Brian has been very great to work with and help refine our QuickBooks Online. I'm working on flipping houses, and Brian has reviewed our settlement statements to track everything properly as well as provide some insight into how others track costs to optimize reporting and visibility.
As a graphic designer and product maker, I consulted Brian from Kellcat about bookkeeping for my business. I was impressed with his knowledge and attention to detail. He helped me understand how to keep my books clean and better organized. Overall, a top-notch service that exceeded my expectations.
I had a fantastic experience with Brian from Kellcat. His knowledge in the field was truly impressive. I left feeling confident and well taken care of, knowing that my financial records are in good hands. He is absolutely a pleasure to work with and is always available when I need him.
I recently had the pleasure of working with Brian for bookkeeping services for my Denver based business. He is not only incredibly knowledgeable but also genuinely kind. His attention to detail and professionalism truly made a difference. Brian's approach made it seamless and stress-free.
My books were a complete disaster. Brian from Kellcat helped me clean them up and also showed me which metrics I should be tracking. His knowledge of QuickBooks blew my mind. He showed me stuff I didn't even know was possible. I would highly recommend working with him.
Brian has been very great to work with and help refine our QuickBooks Online. I'm working on flipping houses, and Brian has reviewed our settlement statements to track everything properly as well as provide some insight into how others track costs to optimize reporting and visibility.
As a graphic designer and product maker, I consulted Brian from Kellcat about bookkeeping for my business. I was impressed with his knowledge and attention to detail. He helped me understand how to keep my books clean and better organized. Overall, a top-notch service that exceeded my expectations.
I had a fantastic experience with Brian from Kellcat. His knowledge in the field was truly impressive. I left feeling confident and well taken care of, knowing that my financial records are in good hands. He is absolutely a pleasure to work with and is always available when I need him.
I recently had the pleasure of working with Brian for bookkeeping services for my Denver based business. He is not only incredibly knowledgeable but also genuinely kind. His attention to detail and professionalism truly made a difference. Brian's approach made it seamless and stress-free.
Most bookkeepers reconcile your accounts.
Kellcat builds your financial system.
That difference shows up in five ways.
Making Money But Still Feeling Like Something's Off?
Get the honest guide to financial clarity: a practical resource that explains the pillars every business owner needs, includes a self-assessment, and helps you identify which part of your financial system needs attention first.
This is not a sales pitch in PDF form. It is a useful guide that helps you diagnose what is missing — whether you decide to work with Kellcat or not.
Clean books. Clear picture.
Confident decisions.
Book a free Discovery Call. Brian will talk through where you are, where you want to go, and whether Kellcat is the right partner for the next chapter of your business.
Clean books. Clear picture. Confident decisions.
Kellcat builds financial systems for real estate investors and growing businesses — from starter kits and bookkeeping to full dashboard and advisory work.
Whatever stage you are at, the goal is the same: clean numbers, a clear picture, and the confidence to make your next decision without guessing.
You are not bad with money. You just do not have a system.
Most business owners we work with are smart, capable, and working hard. The problem is not effort. The problem is that the financial setup has not caught up to the business they have built.
This is not a knowledge problem. It is a systems problem. And that is exactly what Kellcat is built to solve.
Built by an engineer.
Inspired by a CPA.
Kellcat was founded by Brian Kelly, an aerospace software engineer who has spent 11 years building software where precision is not a preference. It is the job.
Long before that engineering career, Brian watched his mother spend 30 years as a CPA, sitting across the table from business owners and helping them understand what their numbers were actually saying. She did not just prepare returns. She helped people see their businesses clearly.
Kellcat exists at the intersection of those two worlds. Engineering-grade precision meets real-world financial guidance. The result is a financial back office built for clarity, not complexity — designed by someone who understands both the systems and the people they serve.
We build financial systems in three layers.
Each layer depends on the one before it. Together, they move you from books that are correct, to numbers you can see, to decisions you can make with confidence.
The numbers cannot drive decisions until they are visible. They cannot be visible until they are right.
Not sure where you fit yet? Start with a conversation.
The fastest way to know if Kellcat is the right fit is to talk through where you are and what kind of support would actually help.
Fix & Flip Kit — real profit on every deal.
LTR Kit — per-property tracking.
Also for BRRRR and home bakery.
Real estate investors, small business owners, and the people building both.
Kellcat specializes in the financial systems that real estate investors and small operators actually need.
Don't fit one category? Book a Discovery Call and Brian will help.
What clients are saying.
From QuickBooks ProAdvisor and Google — unedited.
My books were a complete disaster. Brian from Kellcat helped me clean them up and also showed me which metrics I should be tracking. His knowledge of QuickBooks blew my mind. He showed me stuff I didn't even know was possible.
Brian has been very great to work with and help refine our QuickBooks Online. I'm working on flipping houses, and Brian has reviewed our settlement statements to track everything properly.
I was impressed with Brian's knowledge and attention to detail for bookkeeping. He helped me understand how to keep my books clean and better organized. Overall, a top-notch service that exceeded my expectations.
I had a fantastic experience with Brian from Kellcat. His knowledge was truly impressive. I left feeling confident and well taken care of, knowing that my financial records are in good hands.
He is not only incredibly knowledgeable but also genuinely kind. His attention to detail and professionalism truly made a difference. Brian's approach made it seamless and stress-free.
My books were a complete disaster. Brian from Kellcat helped me clean them up and also showed me which metrics I should be tracking. His knowledge of QuickBooks blew my mind. He showed me stuff I didn't even know was possible.
Brian has been very great to work with and help refine our QuickBooks Online. I'm working on flipping houses, and Brian has reviewed our settlement statements to track everything properly.
I was impressed with Brian's knowledge and attention to detail for bookkeeping. He helped me understand how to keep my books clean and better organized. Overall, a top-notch service that exceeded my expectations.
I had a fantastic experience with Brian from Kellcat. His knowledge was truly impressive. I left feeling confident and well taken care of, knowing that my financial records are in good hands.
He is not only incredibly knowledgeable but also genuinely kind. His attention to detail and professionalism truly made a difference. Brian's approach made it seamless and stress-free.
Most bookkeepers reconcile your accounts. Kellcat builds your financial system.
That difference shows up in five ways.
Making Money But Still Feeling Like Something's Off?
Get the honest guide to financial clarity — the pillars, a self-assessment, and a path forward based on where you are. Not a sales pitch. A useful guide whether you work with Kellcat or not.
Clean books. Clear picture. Confident decisions.
Book a free Discovery Call. Brian will talk through where you are, where you want to go, and whether Kellcat is the right partner for what comes next.
Clean Books. Clear Picture. Confident Decisions.
Financial systems for real estate investors and small business owners. Built by an engineer with a CPA legacy. Based in Littleton, Colorado, we serve clients nationwide with deep roots in the Denver Metro area.
What We Do
Monthly Bookkeeping
Financial Dashboards
Advisory Partnership
Books Cleanup
Financial Starter Kits
Contact
Phone
(720) 257-9211
Location
Littleton, Colorado
Fully Remote Nationwide
Hours
Monday – Friday · Mountain Time