Business owners like to think of stress as the cost of doing business — something to push through, not something to examine. But a growing body of research suggests that mental health isn't a side issue for entrepreneurs. It's a core variable that shapes how well they lead, how clearly they think, and ultimately how their businesses perform. Here's what the research shows, and why it matters more than most owners realize.

Most business owners manage their mental health, their marriage, and their profit and loss statement as three separate projects. Get the numbers right, and the rest will sort itself out — or so the thinking goes. But when you put the research on entrepreneurial psychology, family systems, and business performance side by side, a different picture emerges: these three areas aren't separate at all. They form a single interconnected system, and pressure applied to one point consistently shows up somewhere else.

Christian business owners often obsessively track revenue, margins, and growth rate. Almost none track the slow erosion happening at home while they do it — until the damage becomes too significant to ignore. Marriage coaching for executives must be included in most executive coaching engagements.