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Conflict with your co-founder or business partner: what to do in the first week
You have just had a serious clash with your co-founder or business partner. You sleep badly, you wonder whether this can still be fixed, and you want to know what to do now. This article helps you through the first week.
By Dirk Jan Versluis, registered psychologist (NIP). Updated 26 October 2026.
First, this: a business partnership can feel as intense as a romantic relationship. Not always, but certainly when it goes wrong. After a big clash, your whole future suddenly feels at stake. You cannot continue alone, but continuing together no longer seems possible either. And where children are often the hardest part of a divorce, in a business break-up you are tied to money, ownership, your brand, your reputation and everything you have built together.
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What happens to you in that first week
You experience everything intensely, at work and at home. You go to work tense and come home tense. In your head you play out every possible scenario and every pitfall. You do that because you feel unsafe: it is your way of keeping a grip.
You are constantly on and sleep lightly. And you may feel a mix you do not recognize in yourself: longing for how it was, grief, anger, sometimes even aggression. That is normal. It shows how much this partnership means to you.
It is rarely only about money or strategy
On the surface, the fight is about money, the direction of the company or a decision. But there is almost always more underneath.
You once chose each other to build something together. But people rarely develop at the same pace. One starts a new relationship and looks at life differently. The other gets older and wonders: is this it? That difference grows, in the business too. Usually nobody talks about it early on, until one day it explodes. Trust arrives on foot and leaves on horseback, as the saying goes.
What not to do in the first week
Do not escalate. Above all, you want to prevent new scars. So in that first week, it is better not to:
- Bring in lawyers straight away. It shifts the conversation from “what is going on here?” to “who is right?”, and that is hard to reverse.
- Talk everything through while emotions run high. In the heat of the moment you say things that stick.
- Involve your staff, or let it leak to the people around you. Tension between the two of you quickly hangs over the whole company like a dark cloud.
- Make decisions without consulting each other. Every unilateral step feels to the other like proof that trust is gone.
The cleaner you keep the situation, the less you will have to process together later, and the better the chance of a good outcome, whatever that outcome turns out to be. Give yourself and each other three to six weeks to talk calmly about what the tension really is.
What to do instead
Check whether there is still building material. Before a marriage ends, there are often failed attempts: therapy, a misstep, a mediator. A business conflict also has a history. So ask: is there still a foundation? Is this still material for couples therapy, or already for mediation? You can answer that for yourself first, but often you also need to ask your partner out loud.
Be honest about what you want. Do you still want to work on it? You do not have to; you may also want to part ways. But be honest about it, to yourself and to the other.
Not sure yet? Then do not react too quickly. Many founders end up in a kind of no man’s land after a clash like this. That is very normal. Get proper support before you take steps.
Which kind of help fits?
Choose someone impartial. Even the appearance of partiality can do a lot of damage. That is why, once there is a conflict, it is usually not wise to have the coach of one partner talk to the other.
Choose someone you can truly trust, ideally with a professional code. Each professional does something different:
- A mediator helps you reach a solution constructively, by negotiating your conflicting interests.
- A lawyer appeals to something higher: the law. If you cannot work it out together, a judge decides. That is the last step.
- A coach works voluntarily, towards the goals you set.
- A psychologist can also bring the deeper, more complex patterns underneath into view.
What a psychologist sees that a business adviser misses
A business adviser looks at the numbers, the contracts and the structure. As a psychologist, I mainly look at the undercurrent. In every conflict between co-founders there is a large blind spot, personal as well as professional. When the analysis is right and both partners recognize themselves in it, a new perspective opens up. You often hear: “Finally we have words for what was brewing all that time.” That gives room to move on: sometimes together, on a new basis, and sometimes towards a new future, without a bitter break-up.
Read more about entrepreneur psychology.
Frequently asked questions
Should I call a lawyer after a fight with my co-founder?
Usually not in the first week. Bringing in lawyers straight away shifts the conversation to who is right, and that is hard to reverse. Seek legal advice when there is a real risk to your interests, but first look at what is really going on.
Mediation or therapy for business partners?
That depends on whether there is still a foundation to build on. If you both want to work on the partnership, guidance aimed at the relationship fits. If you are mainly negotiating how to part, mediation fits better.
Can the coach of one partner help both?
Once there is a conflict, that is risky. Even the appearance of partiality can do damage. Choose someone impartial.
In the middle of a conflict with your co-founder?
In a free 45-minute strategy session, online, we look at what is going on and whether we are a good fit. Confidential, under the professional code of the NIP.