Financial Modelers Must Master the Fundamentals Before Trusting AI with Chris Reilly

In this episode of Financial Modeler’s Corner, host Paul Barnhurst welcomes back Chris Reilly for a deep and practical conversation on financial modeling fundamentals in the age of AI. Chris shares why mastering the basics still matters more than ever, how AI is changing modeling workflows in reality (not hype), and where automation genuinely adds value versus where human judgment is still essential.

Chris Reilly is a former private equity professional and financial modeling expert with experience spanning restructuring, FP&A, treasury, and middle market private equity. He began his career at FTI Consulting during the financial crisis, working on major bankruptcies, including Lehman Brothers, before moving to Hilton Worldwide and later into private equity. Chris is the founder of Financial Modeling Education, where he has trained more than 90,000 professionals worldwide, teaching real-life models used to acquire and manage private equity-backed businesses.

Expect to Learn

1. Why financial modeling fundamentals matter more than ever in an AI-driven world
2. How Chris actually uses AI in real client models versus online hype
3. Why simple, well-built models outperform overly complex ones
4. How to balance technical modeling skills with business decision-making

Here are a few quotes from the episode:

1. “AI is a great accelerator if you already understand the fundamentals. If you don’t, it just magnifies the problem.” - Chris Reilly
2. “There’s a missing middle right now where people are skipping the fundamentals and jumping straight to the results.” - Chris Reilly

Chris emphasizes that while AI and automation can improve efficiency, they do not replace the need for strong accounting knowledge, modeling fundamentals, and business understanding. He explains that the best modelers focus less on tools and functions and more on clarity, reliability, and helping decision makers understand what to do next.

Follow Chris:

LinkedIn: https://www.linkedin.com/in/chris-reilly-mission-capital/

Homepage: https://www.financialmodelingeducation.com/

Email list: https://financialmodelingeducator.com/

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In today’s episode:

[02:35] - Fundamentals Before AI

[05:55] - From PE to Teaching

[09:17] - Dynamic Arrays in Practice

[13:25] - Limits of Dynamic Models

[18:09] - Modeling vs Technical Debate

[21:04] - AI Hype vs Reality

[26:45] - Avoiding Bad Models

[33:00] - Advice for Modelers

[35:38] - Future of AI in Excel

[38:02] - Closing Thoughts