New: Fractional CFO Services – Senior-level financial strategy for your growing business. Learn more →
Turn Your Data Into Confident Decisions
Fractional CFO services, custom spreadsheets, dashboards, and real estate coaching from a financial strategist with 20+ years turning complex data into clear, actionable results.
WHAT WE DO
Services Built Around Your Goals
Fractional CFO
Senior-level financial strategy and oversight without the cost of a full-time hire. Cash flow management, reporting, budgeting, and bookkeeping for growing businesses.
Consulting
Strategic partnership for businesses that need custom spreadsheets, dashboards, and financial systems built from the ground up – tailored to your operations.
Coaching
One-on-one guidance for real estate investors and small business owners. We help you build confidence with your numbers and make smarter financial decisions.
AI Integration
Learn to integrate AI into your business workflows. From automated spreadsheets to smarter decision-making, We train you to be self-sufficient with AI tools.
TEMPLATES
Ready-made tools. Built by a strategist.
Professional-grade financial spreadsheets built from 20+ years of real-world experience. Plug in your numbers, get instant clarity, and make confident decisions. Every template is the same tool we use with our own clients.
Real Estate Investors
Rental property analysis, BRRRR strategy calculators, house flip P&L tools, and portfolio trackers. Everything you need to evaluate deals and manage your holdings.
Small Business Owners
Annual budgets, cash flow forecasting, and expense tracking. Built for owners who want to understand their numbers without hiring a full-time accountant.
WHY CHOOSE US
Your Data Deserves Someone Who Gets It
Simply Spreadsheets is led by Erin Onsager – a financial strategist with over 20 years in commercial real estate. We’ve built hundreds of custom spreadsheets, dashboards, and financial models that help businesses and investors see their numbers clearly and act with confidence.
Whether you need a one-time analysis or an ongoing partner for your data, we bring the same hands-on, detail-driven approach to every project. No generic templates, no project too small – just tools built around your specific goals.
SISTER COMPANY
When you need legal counsel alongside the numbers.
Simply Spreadsheets works in close partnership with GC Counsel PLLC, a fractional general counsel firm built specifically for contractors. Legal strategy and financial analysis regularly need to speak the same language – and on complex matters, having both capabilities coordinated from the start makes a real difference.
Whether a dispute turns on a damages calculation, a reconciliation runs into thousands of line items, or a company needs to build internal financial reporting to support growth or evaluate performance, Simply Spreadsheets brings the analytical infrastructure to match the legal work.
ABOUT GC COUNSEL PLLC
Practice focus
Construction and Procurement
Service model
Fractional General Counsel
Licensed
CO · AZ · WY*
Advisory coverage
All 50 states
Based
Denver, Colorado
“Numbers tell stories. We help you read them. With 20+ years in commercial real estate and a passion for financial modeling, we build custom tools that give you real clarity – so you can make decisions with confidence.”
Erin Onsager
Founder, Simply Spreadsheets
Ready to Make Your Data Work for You?
Book a free 15-minute discovery call. We’ll talk about your goals and we’ll show you exactly how we can help – no strings attached. Email simplyspreadsheets.co@gmail.com or call 860.857.8986
Simply Spreadsheets 