The 85 Percent Rule: Why Good Leaders Leave Room for Real Life

Most people understand planning, at least in theory. You look at what needs to be done, you figure out who can do it, and then you try to build a schedule that makes sense. That sounds simple enough until real life shows up and starts moving things around.

That is where a lot of leaders get in trouble. They plan like everything will go according to plan. They fill every space on the calendar, every line on the board, and every hour of the team’s time. On paper, it looks great and even look impressive to someone who is only looking at the plan and not the people who have to live inside it.

But a plan with no margin is fragile and doomed to fail.

I learned that lesson as a first responder during one of our early Agile planning cycles. We had been working for a few months on how to size our work, how to make the work visible, and how to stop pretending the team had unlimited capacity. After some trial and error, we realized our team could usually handle about 150 points of work in a two-week sprint. That number gave us a baseline. It helped us see what we could carry when the work was clear, the priorities made sense, and the estimates were honest.

The easy thing would have been to plan all the way to 150 points every time, but in first responder world, something unexpected always happens. A search and rescue case comes in, the boat breaks, someone gets sick, a maintenance issue becomes more serious than expected, or your boss calls tasking you to put out a new fire that just hit their desk.

The same pattern shows up in business, schools, nonprofits, and government offices, even though the setting may look different. A customer issue pulls attention from the planned work, a system outage slows the team down, a key employee is unexpectedly out, a parent calls with a concern, a senior leader adds a new priority, or a deadline moves without much warning. Then the project that looked simple at the beginning starts to stretch, shift, and consume more time than anyone expected. Every organization has its own version of the unexpected, which is exactly why leaders need to build margin into the plan before the pressure arrives.

So we made a simple decision. If our real velocity was about 150 points, we would plan to 85 percent of that number. That gave us a working limit of about 135 points, which meant we were leaving room for the work we could not see coming yet. That one decision changed the way planning felt.

Before we started using the 85 percent rule, planning often felt like a meeting where leaders kept adding work until the board looked full, even when the team already knew the plan was getting too heavy. Once we established a real planning limit, the conversation changed. The board became more than a place to assign tasks. It became a place where the team could talk honestly about capacity, risk, and tradeoffs before the pressure moved from the board into people’s lives. The number gave the crew a boundary, and that boundary gave them permission to say what everyone may have been thinking but had rarely said out loud.

The real test came during a planning session when the board started creeping past 135 points. I could feel the old habit coming back into the room, the one where good people look at too much work and still try to find a way to carry it. The team wanted to help, and they wanted to get the work done because dependable people usually do. They take on more than they should because they care about the mission, the organization, and the people around them. The danger for leaders is that we can mistake that willingness for true capacity, and when we do, the team ends up paying for our optimism.

Then the Chief spoke up and explained to the team that we needed to push something to the right because the board had moved past the 85 percent rule. I nodded in agreement, but I also remember feeling proud because he was no longer just participating in the new way of doing business. He was helping protect it. He understood that the number was there for a reason, and he was willing to say out loud what the team needed to hear before we overloaded the plan.

That was a big moment because the team was using the system the way it was meant to be used. They were not complaining, and they were not trying to avoid work. They were telling the truth about capacity. More importantly, they were holding the line on a boundary we had agreed to protect, which meant the planning process was starting to shift from something leadership managed to something the crew owned.

I had a choice. I could keep the work on the board and make the plan look better, or I could protect the team’s ability to actually execute. If I went back on my agreement, the entire system would fail and our training would have been for nothing. It was imperative that I held that line with them.

There was no big speech or celebration after that, but I knew the impact of that moment. The team saw that the number meant something. They saw that capacity was real and leadership was willing to honor the process even when pressure showed up and the easier answer would have been to keep adding work.

That is a lesson younger leaders need to learn early. Leadership is not measured by how much more work you can push onto a good team. At times, leadership is having the discipline to look at the board, look at the people, and say, “We are already at capacity, so something has to move.” I thought that may feel uncomfortable in the moment, but I was wrong. It felt good to  protect the team’s ability to execute well instead of simply appearing busy.

Planning to 85 percent is honest capacity management. It gives people room for unexpected problems, quality work, sound judgment, and the daily disruptions that always arrive without asking permission. When leaders plan teams at full capacity, the plan only works if everything goes right, and that rarely happens. The team eventually pays for that overplanning through stress, rushed work, longer hours, and burnout.

The 85 percent rule also makes accountability clearer. When a new priority comes in, something else has to move. When something becomes urgent, something else has to wait. That kind of visible tradeoff builds trust because the team can see leadership managing the system instead of expecting people to quietly absorb the overload.

This lesson applies to business leaders, school leaders, program managers, and first responder leaders alike. A team planned to full capacity has little room to adapt, while a team with protected margin can respond to disruption, make better decisions, and sustain performance without burning through its best people.

If your team is carrying too many priorities with too little margin, I help leaders build practical systems that create clarity, protect capacity, and execute change without burning out the people doing the work.