Welcome! Here you’ll find a collection of my latest Tools and Articles. I originally built these models in Excel, but as the complexity and design requirements grew, I transitioned to Streamlit for greater flexibility and a more user-friendly experience.
You may notice that several articles still reference the original Excel versions — I plan to update these in the future. My goal is to align each tool with a corresponding article and video, creating a clear, cohesive learning experience.
The content and tools on KnowTheCostFinancial.com are meant to educate and help you explore ideas, not to serve as personal financial advice. They are a starting point and provide a method to begin thinking about variables at play and potential tradeoffs. For individual planning, please speak with a qualified professional.
While I take great care to ensure accuracy and make assumptions transparent, tools may contain errors or have limitations that leave out critical context for personalized decision making. No guarantees apply to their accuracy or outcomes that result from their use. If you find something that looks off or would like an additional feature, please let me know. Thank you!
Latest Tools
Rent vs Buy Decision Support Framework:
Automotive Purchase Decision Framework:
Advisor & Fund Fee Framework:
Latest Articles
Buying a car is something many of us dread.
For most people, it’s the second largest financial decision...
Cost is only an issue in the absence of value.
But value means different things to different people....
Explore the opportunity cost associated with renting and buying using a predictive model. What are your...