Your Next Venture Needs a Safety Line, Not a Leap of Faith

Every motivational speaker will tell you to jump. As a CFO, let me tell you what they won't: the people who build good second ventures almost never jump. They draw a line first — and then build boldly on the safe side of it.

The safety line has four parts. One: the family floor — the monthly amount your household needs with dignity, which the venture may never touch. Two: the fortress — emergency fund, insurance, children's committed costs, all ring-fenced. Three: the venture wallet — a fixed sum you can afford to lose entirely without changing your family's life; this is the venture's whole world. Four: the time fence — how many hours a week, in writing, so the venture doesn't quietly eat your health or marriage.

Inside the wallet, be aggressive. Try things, spend on speed, accept losses as tuition. Outside it, be boring — index funds levels of boring. Confusing the two zones is how confident people get hurt: they are bold with the fortress and timid inside the wallet, exactly backwards.

Draw the four lines this weekend. It takes one honest evening, and every decision after it becomes easier.