A Jerry Macnamara term
What is the 50 percent rule in relationships?
The 50 percent rule says you own exactly half of any relationship, never more, so the standard is to own your half so completely that the other half has nothing to push against.
Where it comes from
I run my whole life on a philosophy I call “people are good.” I give trust first, every time. I’d rather trust first and occasionally be wrong than live in paranoia and be permanently small. Suspicion feels like protection. It’s actually a ceiling.
The 50 percent rule is the humility check that comes with giving trust first. I put the two together at the Jacksonville Football Club Coaches Symposium keynote on August 8, 2026: you only own fifty percent of any relationship. Half. That’s your allocation, and it never goes up. You can’t control whether a player extends trust back, or whether a parent does, or what happened in the car on the way to practice. Their half is theirs.
How to use it
Own your fifty percent so completely that the other half has nothing to push against. Flawless on your side of the street. That’s not a burden. It’s a liberation. You get to stop managing other people’s halves and pour everything into the only half that was ever yours.
In business: the customer who went quiet, the partner who’s late, the direct report who’s guarded. You don’t control their half. You control yours. Did you set the expectation clearly? Did you follow through? Did you tell the truth about the hard thing? Did you show you cared? Most relationship problems I’ve seen in twenty-five years of leading people weren’t people problems. They were pillar problems on somebody’s own side of the street.
And when the other half never shows up? You still did your job. That’s the rule.
Questions people ask
Does the 50 percent rule mean I should give trust to everyone?
Yes, first. Most people, handed trust before they’ve earned it, will move heaven and earth to prove you right. You’ll occasionally be wrong. That’s the price of not being small.
What does owning my half actually look like?
Four pillars: competency, consistency, integrity, compassion. Know your craft. Be the same person up three and down three. Do what you say. Care about the person, not just the role. Lose any one of them and the whole thing wobbles.
What if the other person never holds up their half?
Then you’ve learned something, and you learned it without compromising yours. The rule doesn’t promise every relationship works. It promises you’ll never be the reason one didn’t.
I teach the rule, and the four pillars of trust underneath it, on stage in Creating a Culture of Accountability. If your team or your conference needs to hear it, start at speaking.