Over the years, I’ve had countless conversations with business owners who wanted to know what the biggest mistakes to avoid were. The question usually comes from a good place. They’re looking for shortcuts around the painful lessons. They want to know what to watch out for before they make the same mistakes themselves.
Every time I’m asked, people assume I’ll talk about bad investments, failed marketing campaigns, poor hiring decisions or deals that went wrong. Those things can absolutely be expensive, and I’ve seen all of them happen. But the longer I’ve spent building businesses and watching other founders build theirs, the more I’ve realised that the most expensive mistakes rarely look expensive at the beginning.
One of the most common mistakes I’ve seen is founders spending years building something they don’t actually want.
It sounds strange when you say it out loud, but it happens far more often than people realise. A business starts with a simple goal. Maybe it’s financial security. Maybe it’s freedom. Maybe it’s creating something meaningful. Then somewhere along the way the business takes on a life of its own. More clients arrive. More opportunities appear. Revenue grows. New services are added. New markets are explored. The founder becomes so busy building that they stop asking themselves whether they still want what they’re building.
I’ve met founders running highly successful businesses that looked incredible from the outside but left them completely exhausted. The revenue was there. The growth was there. The recognition was there. But the life they originally wanted had quietly disappeared somewhere along the journey.
I think that’s one of the reasons I pay so much attention to direction now. Early in my career I was far more focused on movement. As long as things were growing, it felt like progress. As long as new opportunities were appearing, it felt like success. What I’ve learned over time is that growth and progress aren’t always the same thing. Sometimes you’re simply getting bigger. Sometimes you’re actually getting closer to the life and business you want. Those are very different outcomes, and confusing the two can cost years.
Another mistake I’ve seen repeatedly is waiting too long to make a decision that already needs to be made. I’ve done this myself more times than I’d like to admit. There are situations where you know something isn’t working. It might be a team member, a client relationship, a supplier, a business partnership or even a service offering. Deep down, you know the situation isn’t improving. You know it’s creating friction. You know it’s taking energy away from the business. Yet for some reason, we convince ourselves to wait a little longer. We hope things will improve. We tell ourselves we need more information. We look for evidence that supports the outcome we want rather than the reality in front of us.
The interesting thing is that when those situations eventually come to an end, most founders tell the same story. They knew much earlier than they acted. The decision itself wasn’t the expensive part. The months or years spent delaying it were. The energy spent thinking about it. The conversations. The frustration. The distraction. Looking back, it’s often obvious that the real cost wasn’t the decision. It was the hesitation.
I’ve also noticed how often founders underestimate the cost of complexity. In the beginning, adding something new feels exciting. A new service. A new product. A new division. A new opportunity. Each decision makes sense on its own. The problem is that complexity accumulates quietly.
Nobody wakes up one morning and decides to create a business that is difficult to run. It happens gradually. One extra thing becomes another extra thing, and before long the business feels heavier than it used to. There are more moving parts, more decisions, more meetings, more processes and more dependencies than anyone anticipated.
Some of the most successful founders I’ve met are surprisingly disciplined about keeping things simple. Not because they lack ambition, but because they’ve learned that complexity has a cost. Every new offering creates operational challenges. Every exception creates a process. Every new direction demands attention. The businesses that scale well often aren’t the ones doing the most things. They’re the ones that know exactly what they’re good at and remain focused on it for far longer than most people have the patience to.
As I’ve gotten older, I’ve become increasingly convinced that time is the most valuable asset any founder has. When you’re younger, it feels abundant. You assume you’ll always have enough of it. You believe you’ll eventually get around to the things you’re putting off. Then the years start moving faster. Businesses evolve. Children grow up. Priorities shift. Suddenly you realise that time compounds in exactly the same way money does.
That’s why I no longer think the most expensive mistakes are financial. Money can usually be recovered. A bad investment can be offset by a good one. A poor business decision can often be corrected. Lost time is different. Years spent pursuing the wrong opportunity. Years spent avoiding a necessary decision. Years spent building something that no longer aligns with your values. Those are much harder to recover.
When I look back at founders I’ve admired over the years, what stands out isn’t that they avoided mistakes. Every one of them made plenty. What stands out is that they became better at recognising which mistakes were worth making and which ones weren’t. They learned when to persist and when to let go. They learned how to distinguish between a temporary setback and a fundamental misalignment. Most importantly, they learned that success isn’t just about what you’re building. It’s also about what you’re sacrificing to build it.
The most expensive business mistakes I’ve seen have very little to do with spreadsheets, revenue reports or balance sheets. They usually begin much earlier than that. They begin when founders stop paying attention to where they’re going, why they’re going there and whether the destination still matters. By the time those mistakes show up in the numbers, they’ve often been unfolding for years. The real cost was never the money. The real cost was everything that happened before it.