Pick Your Spouse Carefully. Pick Your Business Partner More Carefully Than That.

What marriage can teach us about business partnerships.

Every marriage ends in death or divorce. So when I tell a happily married couple, "I hope yours ends in death," it's the kindest thing I can wish them. Fifty years from now, same house, still arguing about the thermostat.

Business partnerships don't get that blessing. Often, they end in a lawyer's office with everyone alive and nobody speaking. What started as a great idea between good friends ends in harsh words and a lot of resentment.

I have a friend who's a divorce lawyer in the US. He's told me countless stories over the years about how ugly divorces can get. He has a deep understanding of how relationships can end. Nobody tells you the truth like someone who's billing for it.

The pattern in his stories never changes. Nobody sees it coming, and everyone could and should have. The couples who do best are never the ones who loved each other most. They're the ones who sorted out the boring, awkward stuff early, while they still liked each other. Money, who decides what, and what happens if it falls apart.

The key advice: get agreement before you think you need it.

I've been a business coach for 25 years, and I've watched business partners make the same mistakes, in the same order, with higher stakes and less sympathy. Same story, different paperwork.

So I borrowed his list.

The thing we thought we'd agreed on

My daughter is ten now. Her mother and I spent almost a full year talking about what we wanted her upbringing to look like. Right down to the basics. We wanted to know we understood each other before the decisions arrived.

We missed one thing. School. A good school was a given. Whether that meant private, and what private fees looked like, never got the same attention. Her mother is a teacher, so I trust her call on what makes a good school. Our daughter now goes to NZ's best, and second most expensive, school. The Ferrari will have to wait.

We'd agreed on the principle. We hadn't agreed on what it meant in practice, or what it would cost. We were lucky. We could afford it. Business partners usually can't.

They do this constantly. "We'll hire good people" sounds sensible until someone mentions salaries. "We'll look after our customers" gets a unanimous vote until keeping one happy costs four figures. "We want to grow" is a lovely shared ambition until one of you finds out it means leaving $100k in the business instead of taking it home.

The useful conversation starts where the easy agreement ends. What would we actually do, what would it cost, and what would each of us have to give up?

The vetting problem

You'll spend a year or two deciding whether to marry someone. You'll meet the family. You'll see them tired, hungry and wrong. Your friends will tell you what they think, unprompted, after a drink.

Now look at how most people pick a business partner. A coffee. A good feeling. A shared loathing of your current boss. A handshake, and a shareholders' agreement downloaded from the internet at 11pm, if there's one at all. People do more due diligence on a second-hand Corolla.

Why do smart people do this? Because they pick on liking, and liking is the weakest filter going. Or they pick someone with their exact skills, and now there are two salespeople and nobody reads the P&L. Or they pick a mate. Twenty years of friendship tells you someone is great company at a barbecue. It tells you nothing about how they behave when wages are due and the bank account is empty.

Date them first

Before anyone signs anything, I'd want these answered.

How do they behave when money is tight? Anyone is a great partner in a good quarter. Ask the people who've seen them in a bad one.

What do they do when they're wrong? Watch this closely. It predicts more than skill does. Someone who needs every mistake to be somebody else's fault will eventually need it to be yours.

What do they want the business to be in five years? One wants to sell and take up golf. The other wants to hand it to the kids. Both are fine. Together they're a slow disaster. Mismatched ambition does more damage than incompetence.

If you can, run one small project together before you merge anything. You'll learn more from delivering something under pressure than from another lunch about how well you get on. Then ring the last two people they worked with and ask why it ended. Ask the other side, not just theirs.

Compare your philosophies (the awkward quiz)

Couples never ask each other the big questions. Money, kids, where to live, whose mother gets Christmas. They find out in year six, mid-argument, in a car park. Business partners do the same, with a bigger mortgage.

So ask them now. One at a time, out loud, and write the answers down. And don't only ask what they believe. Ask what they did. Everyone answers a philosophy question with the person they'd like to be. "Tell me about the last time you borrowed money and how it went" beats "What's your view on debt?" every time.

You don't need identical answers. You need to know the gap and agree how you'll handle it. A risk-hungry partner and a cautious one can be a great pair, if they both know which one they are.

Risk. Would you bet the house on this? Would you bet half the house? One of you sleeps fine with a big swing. The other checks the bank balance at 3am. Neither is wrong. But you'll make every major decision through that lens, so know whose lens is whose.

Debt. Is it a tool or a failure? Some people see borrowing as fuel. Others see it as a slow-moving threat. Agree what you'll borrow for, how much is too much, and whether either of you will sign a personal guarantee. If one of you says "never" and the other says "obviously," you have a problem worth finding today.

People versus technology. When something's slow, do you hire or automate? This one quietly shapes your whole cost base. One partner wants a bigger team. The other wants a system that does the job of three. Both will say they're being sensible.

Customer service versus efficiency. Do you take the phone call or put in the form? A partner who'll drive across town to fix an unhappy customer and a partner who wants every query handled by a link are running two different businesses. The customers can tell.

Pay yourselves or reinvest? How much comes out, and when? A partner with a mortgage and school fees has a very different answer from one with no debts and an appetite for growth.

Pace. Fast growth or steady? Most partners swear they want the same thing, until the first hire at the wrong time.

Effort. How many hours, and what counts? If one of you is in at 7am and the other is on the golf course by 3, say it now, not when the resentment arrives.

Standards. What do you do about the underperformer who's also your friend? What do you do when a shortcut is legal but ugly? You'll face both. Your answers will say more about the partnership than the strategy ever will.

There are a hundred more. Pricing, hiring, brand, who's allowed to say yes to what. Don't skip the list because it's long. Skip a dinner party instead.

Why this is harder than marriage

Your spouse can't sign you up for a five-year shop lease on a Tuesday afternoon. Your partner can. In a New Zealand general partnership, partners can be personally liable for what the other commits the firm to. Company owners aren't off the hook either, because the bank will want personal guarantees from both of you. Know which structure you're in and what authority the other person has to spend your money.

Divorce at least comes with a script. A partnership with nothing in writing has two people and a lawyer, and the lawyer is the only one who's happy.

And nobody's watching. Nobody was at your wedding. Nobody asks how you two are going. Partnerships don't blow up. They rot quietly in the back office, for years.

So here's what marriage can teach you, minus the flowers.

Lesson one: book the counsellor before the fight

Most partnerships start 50/50. It feels fair. It's also the structure that stalls more businesses than any competitor.

One partner wants to hire, open a second site, buy the system. The other doesn't. That's 50% yes and 50% no, so nothing passes. A half yes is a no, and a no never has to explain itself. A deadlock isn't neutral. It favours whoever wants to change nothing, which is why the cautious partner suddenly develops a deep love of meetings. The frustration then moves out of the boardroom and into the relationship, where it lives rent-free for years.

Fix it now. Agree a dispute process in writing and name a third party who breaks ties. Pick them while you still like each other, because after the first big fight you'll never agree on who it should be.

Be precise about their job. Helping you reach agreement, giving an expert opinion and making a binding decision are three different roles. An adviser doesn't acquire the power to break ties just because you both like them. Write down which one you're hiring.

Two cautions. Don't send everything to the tiebreaker. Define what counts as a deadlock, such as spend above a set amount, a senior hire, a change of direction. Below that line, each partner owns their patch and gets on with it. A referee for every small call is just a slower way to fail. And the tiebreaker must be someone who can say no to both of you. If either of you can steer them, the other will soon stop trusting the game.

Some partners go 51/49 with a casting vote. That works if the 49% genuinely accepts it. If not, you've swapped a deadlock for a resentment.

Lesson two: sign the prenup

Every partnership ends. Someone retires, burns out, gets divorced, gets sick or gets a better offer. You don't choose whether it ends. You choose whether the ending was written down when you were friends or negotiated when you aren't.

Without it, one partner wants out, the other wants to stay, and neither has a number. The leaver thinks the business is a gold mine. The stayer thinks it's a lot of hard work held together with tape. Both are being completely honest, which is what makes it so ugly.

Agree three things in writing.

The triggers. Death, disability, divorce, bankruptcy, a partner who stops turning up, a partner who wants out. Each needs its own terms. A partner leaving for a better life and a partner who stopped working in March are not the same case.

The price. Name the method, not just the number. A multiple of earnings, an independent valuer, or a formula reviewed each year. A number you agree in a good year is a gift or a robbery by year three. And agree how a dispute about the valuation gets settled.

The payment. A fair price means nothing if the remaining partner can't fund it. Agree lump sum or instalments, and what happens if a payment is missed. For death and disability, look at insurance that funds the buyout, so a partner's family isn't left holding half a business and the survivor isn't left with a stranger as a co-owner.

And don't forget the guarantees. Selling your shares and being released from your personal guarantee are two different events. One doesn't automatically take care of the other.

A shotgun clause is the grown-up version of "I cut, you choose." One partner names a price, the other decides whether to buy or sell at it. It forces honesty, but it favours whoever has more cash, so think twice if your bank balances differ.

Do all of this early, because right now neither of you knows who'll be the leaver and who'll be the stayer. That ignorance is the only thing that makes the terms fair. Once you know, every clause becomes a weapon.

Lesson three: deal with the in-laws before they turn up

Someone will want in. A key manager who's carrying the place. An investor with cash. Your partner's brother-in-law, who has a really good feeling about this. Family gets the same scrutiny as everyone else, possibly more, given you'll still have to see them at Christmas.

Here's what a third shareholder does to a 50/50 business. They break the deadlock. Sounds like a fix. It's a hostage situation with a cap table. Whoever they side with wins every argument, and both original partners now spend their energy courting a third person instead of talking to each other.

So agree this in writing first.

Who can come in, and who can't. Name the categories. Key staff, outside investors, family, a partner's spouse. It's far easier to refuse a category than a person sitting across the table from you.

Who has to say yes. Both of you, always. If one partner can quietly bring in a third, they've ended the 50/50 without a vote.

Right of first refusal. If a partner wants to sell to an outsider, the other gets first go at the same price. Otherwise you wake up one day with a stranger who bought half your business from someone you thought you knew.

What they actually get. Voting shares, or just a share of the profits? Equity is the most expensive thing you own and you only get to give it away once. A key manager often does better with a profit share or options that vest over time than with a vote. Ownership lasts long after the excitement of the offer has worn off.

And they sign the existing agreement, dispute process and exit terms included. They don't get to renegotiate the house rules from the inside.

One test. If you can't say in one sentence what a third shareholder adds that cash or a good salary couldn't, you probably don't need one.

Lesson four: agree who pays for the bad month

Sooner or later the business needs cash, and one of you has it. This is where friendships go to die quietly.

If that partner puts in new shares, the 50/50 is gone. Whoever has the money now has the votes. If they lend it, you need to know the terms, because "I put in $100k" means very different things to the person who gave it and the person who got it.

So write it down. Is it a loan or shares? Is there interest, and is it a fair rate? Is it secured against the business, or unsecured? Secured gives the lender a weapon against the company they co-own, so don't let it happen by accident. Does the loan come back before either of you takes a dollar out? Does the other partner get the first chance to put in the same amount? What happens if they can't? And what happens to the loan if the lender dies?

Money put in during a crisis tends to pick up a story afterwards. One person remembers rescuing the business. The other remembers a loan. Write down which it was while you both still agree.

A partnership without these answers isn't 50/50. It's 50/50 until someone has a spare $100k.

Lesson five: keep having the conversation

An agreement signed at the start is essential. It's also a photograph of two people who no longer exist.

The partner who wanted fast growth now has a sick parent. The one who didn't need drawings now needs an income. Someone who loved running the place wants a different role. None of that makes them a bad partner. It means the arrangement needs attention.

Book a quarterly conversation about the partnership itself. Workload, money, direction, what feels unfair, what each of you wants now. Keep the sales figures out of it. You can have a profitable business and a rotting partnership at the same time, and plenty of people do. Review the formal agreement as things change, because a document from ten years ago can't tell you what your partner has quietly been worrying about for six months.

If you're already in business together and this all feels like a lot, start small. Ask three questions. Who decides when we disagree? What happens if one of us wants out? What happens if the business needs more cash? Write your answers separately, then compare them. You'll find out whether you agree, or whether you've been running two different businesses in your heads. Either result is a useful place to start.

Lesson six: vows, but with signatures

None of this is fun. Nobody's idea of a good Friday is arguing about what happens when one of you dies, or what your half is worth. It's awkward, a bit morbid, and it will make someone cry in a meeting room. Do it anyway. Work through the gaps yourselves, then get a lawyer to turn it into documents that fit your structure.

A difficult conversation while you still like each other gives you options. The same conversation after the trust has gone gives you invoices.

Marriage runs on love and goodwill. A partnership runs on love and goodwill until the first tax bill. After that it runs on whatever you signed.

If you're already in a partnership with nothing in writing, that isn't a romance. It's a problem with a delay on it.

Choose your spouse carefully. You get a ring and a few witnesses.

Choose your business partner more carefully. You get a handshake and a bank guarantee.

I hope both end in death. Eventually. Of natural causes.