How can I help?
Bookkeeping isn’t just about numbers—it’s about giving you clarity and confidence in your business finances. With simple systems in QuickBooks Online and ongoing support, you’ll always know where you stand and can make decisions with ease.
Areas of expertise:
QuickBooks Online Setup & Support – Get your books organized so you start with a clear foundation.
Transaction Management – Categorizing and reconciling so your numbers are always accurate.
Reporting & Insights – Easy-to-read reports that bring confidence to your decision-making.
Payroll – Stress-free payroll and tax filings, done on time.
State Tax Filings – Washington Department of Revenue filings handled with care.
Monthly Bookkeeping – Ongoing support so you can move forward with peace of mind.
Get to Know Me
When I’m not working with numbers, you’ll usually find me outside. Horses have been a lifelong passion, and I’m the co-founder of Courageous Connections, a nonprofit that helps people grow through the wisdom horses offer.
Before launching Brightside Bookkeeping, I spent 25+ years managing large technology projects—building budgets, leading teams, and solving complex problems. That same attention to detail and problem-solving is what I now bring to small businesses and nonprofits.
I recharge by hiking, running a few half marathons each year, and doing agility training with my Border Collie, Keyna. My husband, Tim, and I love camping, traveling, and spending time outdoors with Keyna. These joys keep me grounded and inspired — the same sense of balance I bring to my work with clients.
Kind Words from Clients
"Kathy’s expertise has been invaluable to our business. She navigates different business models with ease and brings exceptional math and problem-solving skills to every challenge. Her deep knowledge of QuickBooks has helped us streamline our processes and gain confidence in our numbers." –
Sue E, President
Courageous Connections
"Kathy has been a massive stress reliever and a complete game changer for me! Having someone who is extremely detail focused really allows me to focus on running the business instead of having to worry about making sure payments go out, payroll is run, or taxes is paid etc. Having not just a bookkeeper but someone who has ‘been there done
"Kathy has been a massive stress reliever and a complete game changer for me! Having someone who is extremely detail focused really allows me to focus on running the business instead of having to worry about making sure payments go out, payroll is run, or taxes is paid etc. Having not just a bookkeeper but someone who has ‘been there done that’ in the business world is hugely helpful too because she can also advise and consult about ways to grow the revenue and ways to reduce costs - hugely helpful! – Andrew S, Owner
Sanders Excavation LLC
We had the pleasure of working with Kathy Sanders for several years, and she was a great addition to our team! As an insurance agency, our books can get pretty complex, but Kathy handled everything in a timely manner with exceptional attention to detail.
Michelle H, Owner
PNW Insurance Group