Letter 19/21: The Partnership and People Mathematics – When Two Plus Two Doesn’t Always Equal Four

This is the Nineteenth Lesson in “My 21 Lessons in 21 Years” Series

To celebrate 21 years in business, based on what I have learned from working with accountants, bookkeepers and tax advisors over 21 years I am sharing my journey and some of the lessons I learned along the way. I hope you join me on this journey and maybe learn something along the way too.

When Two Plus Two Equals Six – Why Some Partnerships Multiply Value and Others Destroy It

I’ve had five partnerships in my business life.

One ended in a courtroom with an admission of guilt but by that stage we had already suffered the devastating consequences.

One ended after sixteen years, destroying family relationships that are still not healed today.

One ended in months when I finally learned to move faster when there’s no congruency.

One works so effortlessly that I barely think about it—because that’s what happens when the mathematics just work.

The other is with my wife Caroline who is a true partner in every sense of the word – business, life, love and parenting

This is a lesson about partnership mathematics. About when two plus two equals six. When two plus two equals four. When two plus two equals three. And about learning to recognise the difference before it costs you and your partners too much.

THE MATHEMATICS OF PARTNERSHIP

Here’s what twenty-one years has taught me about partnerships:

The ideal partnership isn’t two plus two equals four.

That’s just addition. That’s just combining resources. That’s two people doing their separate jobs under the same roof.

The ideal partnership is two plus two equals six.

Where the combination and collaboration creates something neither person could create alone. Where one person’s strengths amplify the other person’s strengths. When one persons strengths compensate the other persons weaknesses. Where the whole becomes genuinely, measurably greater than the sum of its parts.

That’s multiplication. That’s magic. That’s what makes partnerships worth the risk.

But sometimes—more often than we want to admit—two plus two equals three.

Where one person’s energy gets drained by the other person’s limitations. Where conflict consumes the value creation. Where managing the partnership takes more effort than the partnership produces.

That’s subtraction. That’s dysfunction. That’s when you need to walk away.

And the brutal lesson I’ve learned five times over is this: you can’t always tell which equation you’re in until you’re deep inside it.

THE PARTNERSHIP THAT EQUALS SIX

Let me tell you about John Murphy.

John handles tax and legal work for our group. Together, we’ve built OmniPro Tax and Legal.

John is really good at tax. I’m good at what I do. And together, we’ve created something better than either of us could have created alone.

That’s the two plus two equals six equation.

Here’s why it works:

John brings deep tax expertise. I bring business development, client relationships, and strategic vision. We’re not competing for the same space. We’re not duplicating each other’s efforts. We’re complementing each other in a way that creates genuine multiplication.

When a client needs tax advice, John handles it with an expertise I’ll never have. When we need to build client relationships or develop new services, I handle that with a passion and capability John doesn’t need to have.

We each do what we’re brilliant at. What energises us.  What creates the most value when we do it.

And here’s what makes it effortless:

I never worry about what John is doing.

Not because I’m checking up on him constantly. Not because I’m micromanaging every decision. Not because I’m getting daily updates on every file.

But because I trust him completely.

I trust his expertise. I trust his judgment. I trust that he’s looking after our clients like they’re his own. I trust that when something needs my attention, he’ll tell me. I trust that when he’s handling something, it’s handled properly.

That’s what two plus two equals six feels like.

No second-guessing. No constant need for updates. No anxiety about whether things are being handled properly. No mental load of worrying about his work. No checking and rechecking. No wondering if I should have done it myself.

Just trust. Just value creation. Just effortless collaboration that makes both of us better.

When you have that kind of partnership, you don’t think about it. You don’t analyse it. You don’t question it.

You just benefit from it while focusing on what you’re meant to be doing.

That’s the standard. That’s what partnership should feel like.

THE PARTNERSHIPS THAT DIDN’T EQUAL SIX

I’ve had three other partnerships that didn’t achieve that mathematics.

What I can tell you is this:

Partnership One ended in a courtroom. What started as collaboration descended into legal warfare. Covert plans and schemes. Secret email trails that came to the surface. The cost—financial, emotional, relational—was devastating. The mathematics of that partnership didn’t just fail to multiply value. It actively destroyed it.

Partnership Two lasted sixteen years before I finally had the courage to end it. Sixteen years of hoping it would improve. Sixteen years of wanting it to be right. Sixteen years of holding on and trying new things because this Partnership was meant to be. Sixteen years of trying to make the mathematics work. Sixteen years of ignoring what everyone around me could see clearly.

The cost wasn’t just financial. It was family relationships that may never heal. It was opportunities missed because energy was consumed managing dysfunction instead of building value. It was the slow erosion of trust not just in the partnership, but in my own judgment. The worst bit is that the separation was best for everyone. The separation created a freedom and a pathway for both partners to walk their own journey and follow their pathway. We held on too long because we both desperately wanted it to work.

Partnership Three ended in months. Not years. Months.

Because I finally learned the lesson I should have learned twenty years ago: when there’s no congruency, move fast.

When the vision doesn’t align, move fast. When the values don’t match, move fast.
When it’s too hard from the start, maybe it’s not meant to be. When there is a need for early “Come to God interventions” maybe it’s just not right. If there are early doubts about the match, listen to your gut. When the mathematics clearly aren’t working, move fast.

Don’t hope it will improve. Don’t give it more time. Don’t convince yourself that you just need to try harder and you need to do better.

Maybe they are not the right person and maybe you are not the right people together.

Call it. End it. Move on.

That partnership ending quickly wasn’t a failure. It was finally learning the lesson that would have saved me years of pain if I’d learned it earlier.

THE TRUST QUESTION THAT CHANGES EVERYTHING

After five partnerships, here’s what I know:

The only thing that matters in partnership is trust.

Not skills. Not experience. Not credentials. Not how good it looks on paper.

Trust.

Can you sleep at night knowing they’re handling their part of the business?

Can you let go of worrying about what they’re doing?

Can you focus on your work without the mental load of checking their work?

If you can’t, you don’t have trust.

And without trust, you don’t have a partnership. You have a problem that’s costing you more than money.

With John Murphy, I sleep soundly. I don’t wonder what’s happening in OmniPro Tax & Legal and whether clients are getting safe and technically correct advice. I don’t check and recheck. I don’t carry the mental load.

That’s trust.

In the partnerships that failed, I was lying awake at 3am. I was constantly checking. I was carrying the mental burden of their role and their work on top of my role and my work.

That wasn’t trust. That was slow-motion catastrophe that I was too stubborn, too faithful, or too hopeful or too afraid to end.

THE LESSON I LEARNED TOO SLOWLY

Here’s the pattern I finally recognised after partnership number three ended:

Every partnership that failed showed me the warning signs early.

The uneasy feeling in my gut. The sense that something wasn’t right. The small compromises that signalled misalignment. The moments where I overrode my instinct with rationalization.

Every single time, my gut knew before my head caught up.

Every single time, I ignored those signals because I wanted to believe it would work. I was always seeing the best outcome and not the reality.

Every single time, waiting longer made it worse.

Partnership number three was different. When the warning signs appeared, I moved fast.

Not cruelly. Not carelessly. But decisively. I took action early and followed a path. I clearly set out the standards I expected and communicated that consistently and uneqivocally

Because I’d finally learned that when two plus two isn’t equalling at least four, you’re not building something. You’re managing decline.

THE FRAMEWORK: RECOGNIZING THE MATHEMATICS

After five partnerships, here’s how I think about it now:

Two Plus Two Equals Six: The Multiplication Partnership

This is what you’re looking for. This is what makes partnership worth the risk.

Signs you’re in a multiplication partnership:

• You trust them completely with their domain
• They trust you completely with yours
• Neither of you needs to check the other’s work
• You each do what energises you and creates the most value
• You both have unique abilities and the partnership allows you to play into those unique abilities
• The combination creates something neither could create alone
• The partnership feels effortless, not exhausting
• You sleep soundly at night

This is my partnership with John Murphy. This is what partnership should feel like.
We don’t agree on everything. We have many different opinions on many things. I’m sure there are times when I annoy him and frustrate him.

We have a relationship of trust and mutual respect on which a partnership can be built.

Two Plus Two Equals Four: The Addition Partnership

This isn’t bad. It’s just not multiplication.

You’re combining resources. Sharing costs. Working under the same roof. But you’re not creating genuine synergy.

Signs you’re in an addition partnership:

• You each do your separate work
• There’s no conflict, but there’s no multiplication
• It’s functional but not magical
• You’re not creating something unique together

This can work. But it’s not the mathematics you’re ultimately looking for.

Two Plus Two Equals Three: The Subtraction Partnership

This is when partnership actively destroys value.

Signs you’re in a subtraction partnership:

• You can’t sleep because you’re worried about what they’re doing
• You’re constantly checking their work
• Managing the partnership takes more energy than the partnership produces
• Your gut tells you something’s wrong
• You’re making excuses for why it’s not working
• You’re hoping it will improve despite no evidence it will
• The conflict is consuming the value creation

This is when you need to move fast.

THE QUESTIONS THAT MATTER

Here are the questions I ask myself now about any partnership or key relationship in my business:

Question 1: Can I sleep at night?

If I’m lying awake worrying about what they’re doing, I don’t have trust. And without trust, I don’t have a viable partnership.

Question 2: Does this feel effortless or exhausting?

Partnership four with John Murphy feels effortless. The failed partnerships felt exhausting. That difference tells you everything.

Question 3: What’s my gut telling me?

My gut has twenty-one years of pattern recognition. When it’s telling me something’s wrong, I need to listen. Not rationalise. Not hope. Listen.

Question 4: Are we multiplying value or managing decline?

Be brutally honest. Is this partnership creating something neither of us could create alone? Or are we just sharing overhead while dealing with constant friction?

Question 5: If I’m considering ending it, why am I waiting?

Fear? Hope? Guilt? Sunk cost fallacy?

None of those are good reasons to stay in a partnership that’s destroying value.

THE HIRING LESSON

The partnership lessons apply to every person you bring into your business.

Because hiring is just another form of partnership. You’re trusting someone to handle something critical to your business.

I’ve learned to move faster with hiring decisions too.

Hire diligently. Check references thoroughly. Test for cultural fit and values alignment, not just technical skills. Use 30-60-90 day plans with clear expectations.

But when you know it’s not working?

Move fast.

Not cruelly. Not without compassion. But decisively.

Because keeping the wrong person in the wrong seat doesn’t help them, doesn’t help your team, and doesn’t help your business.

Your gut knows before your head does. That uneasy feeling? That sense of dread when you see their name on your calendar? That knot in your stomach when you review their work?

Listen to it.

Don’t override your intuition with hope. Don’t silence your gut with rationalisations. Don’t override your intuition with rose tinted crystal balls of what you would like the future to look at. Don’t convince yourself it will get better when everything in you knows it won’t.

I’ve made that mistake too many times. The cost—in money, time, energy, and opportunity—has been enormous.

Moving fast isn’t being impulsive. It’s respecting what your experience is telling you.

THE LESSON THAT MATTERS

I believe in partnerships. I believe in collaboration. I believe in 10x thinking. I believe in WHO not How. I believe in building teams where everyone plays to their strengths.

But I also believe in protecting what you’ve built.

In having the courage to end partnerships that aren’t working.

In moving fast when there’s no congruency.

In listening to your gut even when hope is saying “give it more time.”

Because a bad partnership doesn’t just fail to create value. It actively destroys it.

It drains your energy. It consumes your focus. It steals your joy. It compromises your vision. It damages relationships. It costs you opportunities you can’t even see because you’re too busy managing the dysfunction.

I’ve learned this lesson three times over twenty-one years.

Partnership one cost me a courtroom battle and devastating consequences.

Partnership two cost me sixteen years and family relationships that may never heal.

Partnership three taught me the most valuable lesson of all: when there’s no congruency and the fundamentals aren’t there, move fast.

Partnership four—with John Murphy—shows me what partnership should feel like when the mathematics actually work. When two plus two genuinely equals six. When trust makes everything effortless. When collaboration multiplies rather than drains.

Partnership five – with Caroline Fry – a partnership for life

I am now actively working on partnership six and seven and I know in my heart and soul partnerships will always be a part of my life because we are better together when we are better together

The standard isn’t just finding people who are good at what they do.

The standard is finding people where the collaboration creates something neither of you could create alone.

Where trust makes it effortless.

Where two plus two equals six.

That’s what I’m looking for now. That’s what I’ve learned to recognise. That’s what I’ve learned to protect.

And that’s what I’ve learned to walk away from when the mathematics clearly don’t work—no matter how much I’ve invested, no matter how long I’ve waited, no matter how much I want to believe it will improve.

YOUR TURN

Be brutally honest with yourself:

What partnerships or key relationships in your business are subtraction, not multiplication?

Where are you lying awake at 3am worrying instead of sleeping soundly?

Where is your gut screaming that something’s wrong, but you’re rationalising reasons to stay?

What would change if you had the courage to move fast when there’s no congruency?

And here’s the bigger question: What partnerships could transform your business if you found people where two plus two equals six—and had the courage to walk away from situations where two plus two equals three?

The mathematics don’t lie. Your gut doesn’t lie. Your sleep quality doesn’t lie.

What are they telling you?

Let me know what you think. You can connect with me on social or directly via my linktree – https://linktr.ee/desoneill

Tomorrow: Lesson 20 – “What Tadhg Furlong Taught Me About High Performance – The Difference Between Amateurs and Professionals”