South Denver's bookkeeper for small businesses and real estate investors.
Clean books, clear financials, and a system that actually works. Kellcat provides monthly bookkeeping, QuickBooks setup and cleanup, financial dashboards, and advisory for small business owners across the south Denver metro.
Serving Littleton · Highlands Ranch · Centennial · Lone Tree · Parker · Englewood · Castle Rock · Greenwood Village · Sterling Ranch · Roxborough Park · Ken Caryl
Not just a bookkeeper. A financial systems partner.
Most bookkeepers reconcile your accounts and send you a report. Kellcat builds the entire financial back office from the monthly close to a live dashboard that answers your questions in seconds, to bi-weekly advisory sessions where we review your numbers with you and helps you make confident decisions. Local to Littleton and south Denver. Available to small business owners who are ready for books that actually work.
A neighbor who happens to know the numbers.
Brian Kelly is the founder of Kellcat, rooted in the Sterling Ranch community in Littleton, Colorado. He grew up working in his mother's CPA firm and spent 11+ years as a software engineer building precision systems. Kellcat is where those two worlds meet.
For south Denver small business owners and real estate investors, that means clean books built with engineering precision, financial dashboards that actually answer your questions, and a local partner who understands both the numbers and the community.
Proudly serving South Denver Metro and beyond.
Kellcat is based in Littleton, Colorado — in the Sterling Ranch community — and provides bookkeeping, QuickBooks setup and cleanup, custom business dashboards, and bi-weekly advisory to small business owners and real estate investors across the South Denver Metro area and nationwide. Most communication happens through the client portal, email, and Zoom. No commute required.
Whether you are a real estate investor in Highlands Ranch, a small business owner in Parker, a growing company in Castle Rock, or a contractor in Centennial — Kellcat brings the same precision and financial systems thinking to every engagement.
Not in the list? Kellcat works with small business owners and real estate investors across the U.S. remotely. Location is never a limitation.
Located in Sterling Ranch in the south Denver metro — a neighbor who happens to do this work.
Monthly bookkeeping, QuickBooks cleanup, and financial systems for local business owners and real estate investors throughout south Denver.
Start with a free 30-minute call. Brian will talk through your situation and tell you honestly what the right next step looks like.
Everything happens through the client portal and email. Local roots, nationwide reach.
What South Denver clients are saying.
"I had a fantastic experience with Brian from Kellcat Bookkeeping. 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. Brian cleaned up our books, and continually strives to keep everything running smoothly and correctly, and is always available when I need him. In addition, he is absolutely a pleasure to work with. I would highly recommend Brian from Kellcat Bookkeeping to anyone in need of bookkeeping services in Denver, Colorado and beyond."
"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 every thing properly as well as provide some insight into how others track costs to optimize reporting/visibility."
"As a graphic designer and product maker, I have consulted Brian from Kellcat Bookkeeping in Littleton, CO about bookkeeping for my business. 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. I really appreciate that he took the time to ensure everything was in order. I highly recommend him for anyone who needs reliable bookkeeping assistance in Denver or Littleton. Overall, a top-notch service that exceed my expectations."
"I recently had the pleasure of working with Brian for bookkeeping services for my Denver based business, and I must say, he is not only incredibly knowledgeable but also genuinely kind. His attention to detail and professionalism truly made a difference in my experience. Despite the sometimes daunting task of bookkeeping, Brian's approach made it seamless and stress-free. I left feeling confident and organized, knowing that my finances were in good hands. Brian's friendly demeanor and expertise truly set this service apart."
Questions from south Denver business owners.
If your question is not here, book a free Discovery Call and Brian will answer it directly.
Built for real estate investors, small business owners, and growing businesses in South Denver.
Short-term rental operators in Highlands Ranch, Littleton, and surrounding areas who need true per-property profit after every fee, cleaning cost, and repair.
Fix and flip investors across the South Denver Metro who need project-level clarity and true profit on every deal.
Investors who need lender-ready portfolio reporting across properties before the next refinance window opens.
Bakeries, contractors, service businesses, and owner-operators in Littleton, Parker, Castle Rock, and Centennial who want clean books and a financial partner they can trust.
South Denver contractors and trades businesses who need project-based bookkeeping, job costing, and financial systems built around how they earn.
South Denver businesses whose financial systems have not kept up with their revenue and who need a live dashboard and a financial partner — not just a bookkeeper.
Not sure if Kellcat is the right fit? Book a free Discovery Call and Brian will tell you honestly.
Book a Free Discovery CallBookkeeping for every south Denver community.
Kellcat serves small business owners and real estate investors across the south Denver metro. Select your community below to learn more about bookkeeping services in your area.
Home base for Kellcat. Monthly bookkeeping and QuickBooks cleanup for small businesses, contractors, and real estate investors who call Littleton home.
One of Colorado's largest master-planned communities. STR operators, BRRRR investors, and home-based businesses need books that reflect how they actually earn.
A business-dense suburb anchored by the Denver Tech Center corridor. Small business owners and professional services firms who need financial systems that keep pace.
A high-income community with a strong concentration of professional services and growing businesses near Park Meadows and RidgeGate.
A fast-growing community with a strong contractor and trades culture. Fix and flip investors and small business owners who need project-level clarity.
One of Colorado's fastest growing cities. New business owners and real estate investors who need financial systems built for growth from day one.
An established Denver suburb with a diverse small business community along South Broadway and Hampden Avenue. Clean books and QuickBooks cleanup for Englewood business owners.
Home to the Denver Tech Center and some of Colorado's highest-concentration professional services firms. Advisory and financial systems for businesses that operate at a higher level.
Colorado's third largest city with a broad and diverse small business community. Monthly bookkeeping and financial clarity for Aurora business owners across every industry.
A growing west-side community with strong contractor and trades presence along the I-70 corridor. Clean books and financial systems for Lakewood small businesses.
A newer upscale community in Douglas County with growing small business activity. Financial systems and monthly bookkeeping for Castle Pines business owners ready to scale.
Colorado's capital and largest city. Small businesses and real estate investors across Denver who want a financial partner rooted in the community not just a remote bookkeeper.
Also serving Morrison, Columbine Valley, Ken Caryl, Roxborough Park, Sterling Ranch, Sheridan, and surrounding communities.
View all service areas →Ready to get your books clean and your South Denver business on track?
Book a free 30-minute Discovery Call with Kellcat. The call covers your current books, your business goals, and whether Kellcat is the right fit. No pressure. No pitch. Just an honest conversation about what the right next step looks like.
(720) 257-9211 · [email protected] · Monday–Friday · Mountain Time
