When Excellence Becomes Exhaustion: The Law of Diminishing Returns in Legal Practice

By Sonja Cilliers and Maryke Swarts, PMRI · 19 May 2025

You work hard. You take pride in precision, performance, and delivering under pressure. And for a long time, it pays off. The results are there. The recognition follows. But somewhere along the line, something shifts. You’re still putting in the hours. Still holding the line. Still doing what you’ve always done but the returns are different. You’re thinking slower. Doubting yourself more. Feeling disconnected from the work. Even though you’re succeeding on the surface, it’s costing you more energy than ever to maintain. What you’re experiencing isn’t failure. It’s the law of diminishing returns and in legal practice, it often hits quietly.

What Is the Law of Diminishing Returns?

In economics, it refers to the point at which adding more input yields progressively smaller gains. In law, it looks like:

• More hours producing less clarity
• More effort yielding less insight
• More preparation delivering less confidence

It’s when the strategy that helped you rise – work harder, do more – stops being effective. Not because you’ve done something wrong. But because your mind has hit a ceiling it was never trained to recognise.

Why It Happens to High Performers

Legal culture teaches us that effort is everything. That performance comes from pushing. But pushing is not the same as sustaining. And legal professionals rarely get trained in how to protect or replenish their cognitive edge. As you rise in experience and responsibility, your work requires:

• More complexity
• More emotional management
• More decision-making under uncertainty

And yet, your internal systems – mental clarity, attention, focus – are often left on autopilot. Over time, they begin to deplete. You don’t notice it all at once. But eventually, more input gives you less return.

What This Looks Like in Practice

• You overprepare because you no longer trust your first instinct
• You spend more time correcting things you normally get right
• You can’t turn off your brain, even when you leave the office
• You feel mentally foggy, emotionally flat, or creatively dull

These aren’t signs of weakness. They’re signs of overuse without recovery. And when legal professionals hit this wall, many try to double down instead of stepping back.

The Risk of Ignoring It

The danger is not just in performance decline. It’s in the identity erosion that follows. You begin to question whether you’re losing your edge. You compare yourself to how sharp you “used to be.” You wonder if this is just how the profession wears people down. But often, it’s not decline. It’s depletion. And it’s reversible.

The Shift: From More Effort to Smarter Inputs

One small but effective way to begin reversing the curve of diminishing returns is to build a simple, intentional pause into your work rhythm. For example, take five minutes between major tasks to reset your cognitive state. Step away from your screen. Breathe deeply. Reflect briefly on what matters most in the next task and then intentionally think of something not related to any tasks, a pleasant memory or something you look forward to. This kind of micro-recovery breaks the intensity loop and restores focus, helping you return to your work with more clarity and less fatigue. Over time, these short pauses add up to better decision-making, steadier thinking, and a more sustainable way of working. The legal professionals who sustain high performance long-term are not the ones who keep pushing at all costs. They’re the ones who learn to:

• Recognise when their mental systems are approaching overload
• Shift from intensity to precision
• Recalibrate their inputs – recovery, focus, strategy – to protect output

This doesn’t mean doing less. It means knowing what to protect, when to pause, and how to sustain your performance without exhausting your edge.

Final Thought

In law, excellence often comes from discipline. But if discipline isn’t paired with recovery, reflection, and recalibration, it turns into depletion. You’re not losing your sharpness. You may just be overdue for a shift. Because in high-performance legal work, smarter always outlasts harder. Join the Legal Mind Lab and start training the one thing your legal career depends on most, your mind. For more resources and support, visit the Professional Mind Resilience Institute (PMRI) at www.pmri.co.za or contact us at info@pmri.co.za.