Ben Felix: What This Engineer-Turned-Fund-Manager Really Teaches About Building Wealth That Lasts

Ben Felix manages money for more than 3,000 people across Canada — from first-time savers to multi-millionaires — using a single tool: academic research. His conclusions will challenge almost everything you think you know about investing, buying a home, and what it really costs to leave your money sitting still.

Who Is Ben Felix?

Ben Felix is the Chief Investment Officer at PWL Capital in Canada and the co-host of the Rational Reminder podcast, one of the most rigorously evidence-based investing shows in the world. He studied mechanical engineering at Northeastern University before moving into finance — and that engineering mindset is exactly what makes him different. Where most of the financial services industry operates like a car dealership (selling products, not solving problems), Ben spent years digging through academic literature to build advice he could stand behind completely.

His YouTube channel and podcast have millions of views because he does something rare: he tells you what not to do with your money, and why — backed by actual data from across decades and dozens of countries. He works with clients ranging from people just starting out to those with substantial wealth, and his core finding is that the same principles apply to all of them.

Why I Love Learning From Ben Felix

What I find genuinely refreshing about Ben is that he is relentlessly honest about how uncomfortable good financial advice actually is. He will tell you that the best thing you can do for your investments is to stop looking at them. He will tell you that buying a house might be a worse financial decision than renting — and then hand you the maths to check for yourself. He has no products to sell you, no fund with a high fee to push. He just wants you to make fewer mistakes than most people make.

For young freelancers and entrepreneurs especially, his framework around human capital — the idea that your skills and knowledge are your most valuable asset in your twenties — is a perspective that changes how you think about every career decision you make. This interview is one of those rare conversations where you finish it and genuinely see money differently.

What You'll Learn From This Article

• Why investing has essentially been "solved" — and why psychology, not strategy, is the real challenge
• How the 5% rule tells you in 30 seconds whether renting or buying a home is the smarter financial move
• Why young people are probably under too much pressure to save — and what they should focus on instead
• How to use the PERMA model to set financial goals that actually lead to a good life
• The hidden cost of holding cash — and why doing "nothing" with your money is still a financial decision
• What Ben calls the top 10 financial mistakes people make — and which ones quietly destroy wealth over decades

Investing Has Already Been Solved — The Hard Part Is Your Brain

Ben Felix makes a bold claim early in the interview that most finance content would never dare to make: "Investing has been solved. We're going to use index funds. That's it." The reason most people don't benefit from this simple truth is not a lack of information — it's psychology.

Our brains evolved for survival, not for holding a diversified stock portfolio through a 40% market crash without flinching. When you watch your portfolio drop 5% in a day, your nervous system reacts as though something is genuinely wrong. So people sell. Or they stop investing in stocks altogether. Or they shift to bonds and cash and feel "safer" — while quietly giving up the long-term returns that would have funded their retirement. Ben cites academic research showing that the more frequently people look at their investments, the less risk they take and the lower their long-term returns. Watching daily creates the illusion that the stock market is extremely dangerous. Zooming out to decades reveals that it is one of the most reliable wealth-building tools in history.

A £10,000 investment at 7% annual return — roughly the historical average — becomes £150,000 over 40 years. The same £10,000 sitting in cash at 3% inflation becomes worth £5,336 in real purchasing power over 20 years. The gap between those two outcomes is not strategy or timing or luck. It is simply showing up consistently, not panicking, and letting compounding do its work.

The 5% Rule: Renting vs. Buying Is Not the Question You Think It Is

The rent-versus-buy debate is one of the most emotionally loaded financial decisions people make — and Ben argues it is also one of the most misunderstood. Most people treat renting as "throwing money away." Ben's research shows that owning a home comes with a stack of irrecoverable costs that most buyers dramatically underestimate: mortgage interest, property taxes (typically 0.5–1% of the home's value per year), maintenance costs (Ben now estimates these at well over 2% annually, having been a homeowner for six years), emergency repair reserves, and crucially — the opportunity cost of your equity.

That last one is the one people miss. Every pound of equity sitting in your home is equity that is not invested in the stock market. If stocks earn 7% per year and home prices track inflation at roughly 2–3%, the gap between those two outcomes, compounded over decades, is enormous. Ben developed what he calls the 5% rule to make this calculation concrete and fast.

"Take the price of the home. Multiply by 5%. Divide by 12. That's the monthly rent where you're roughly break-even between renting and owning. If you can rent the same property for less than that number, renting is likely the better financial decision."

— Ben Felix

On a £300,000 home: £300,000 × 5% = £15,000 ÷ 12 = £1,250 per month. If you can rent an equivalent property for less than £1,250, renting and investing the difference will likely leave you wealthier over the long run. This is not an argument against ever buying a home. It is an argument for making the decision with clear eyes rather than cultural pressure.

Your Skills Are Your Biggest Financial Asset — Are You Selling Them in the Right Market?

One of the most actionable ideas Ben introduces is about human capital — the economic value of your ability to earn income. For young people in their twenties, Ben argues that your skills and knowledge are almost certainly worth more than any savings you could accumulate in the same period. This reframes the pressure many young people feel to save aggressively as potentially misplaced. Academic research suggests it may actually be suboptimal for young people to save at the same rate as older earners — because the return on investing in your skills at 22 is likely to be higher than the return on putting £200 a month into a pension.

But Ben goes further with a point that resonates deeply for freelancers specifically: it is not just the skills you have, it is the market where you sell them. He tells the story of a biotech writer who earned £50,000 in a general writing role but £250,000 doing the same work for biotech companies preparing for IPO. Same skill — completely different market. The implication for freelancers is profound: developing a rare, complementary stack of skills and then positioning them in the highest-value market is one of the most leveraged financial moves available to you.

"I really want people to think about how rare their skill stack is. It is not something we are taught."

— Ben Felix

The PERMA Model: Designing a Financial Life That Actually Feels Good

Ben's third mistake on his top-10 list is not setting financial goals — and his method for doing so is more sophisticated than anything most financial advisors offer. He uses the PERMA model, drawn from positive psychology research, as a framework for identifying what a genuinely good life looks like before deciding what to do with money. PERMA stands for Positive emotion, Engagement, Relationships, Meaning, and Accomplishment. The research suggests that a life containing all five of these elements is one most people describe as deeply satisfying.

The goal-setting process Ben walks through has three steps: first, list your goals. Second — and this is the counterintuitive one — double the list. Research shows that forcing yourself to generate twice as many goals surfaces objectives people later identify as just as meaningful as their original ones. Third, map each goal to the PERMA categories. This is where the real clarity comes: if you realise that a goal like buying a Ferrari does not score on positive emotion, engagement, relationships, meaning, or accomplishment, you have a data point worth sitting with. And if it does score — say, you take it to track days (engagement) with friends who share the hobby (relationships) — then you can pursue it without guilt, knowing it is genuinely contributing to a good life, not just the appearance of one.

How to Apply It

Lesson	Practical action	Why it matters
Investing is a psychology problem, not a knowledge problem	Automate contributions and remove daily access to your portfolio	The research shows more frequent checking leads to lower risk-taking and lower returns
The 5% rule for housing	Run the calculation before making any rent-vs-buy decision	Owning has irrecoverable costs most buyers underestimate by 50% or more
Skill stacking beats early saving	Identify one complementary skill to develop this year that makes your existing skills rarer	The return on human capital in your twenties typically outpaces the return on small savings
PERMA goal-setting	Map your financial goals to the five PERMA categories before committing money to them	Spending years and money on goals that do not contribute to wellbeing is a compounding mistake
Cash loses value silently	Move idle cash into a low-cost global index ETF on a recurring monthly basis	At 3% inflation, £10,000 in cash becomes £5,336 in real value over 20 years

Your 30-Day Challenge

For the next 30 days, do the following three things. First, set up (or check that you have set up) an automatic monthly transfer into a low-cost index fund — even if it is a small amount. Automate it so it requires no willpower. Second, run the 5% rule on your current housing situation or the one you are considering — write down the number and sit with what it tells you. Third, identify one skill you currently have and research two industries where that skill commands a significantly higher rate than where you are selling it today. Write down what it would take to break into one of those markets. You are not committing to anything. You are just getting clear on the options you have not yet considered.