The Business Marriage Contract: Founder Agreements

Dr. Niklas Richter · 2026-06-16

Starting a business is exciting. You have a great idea, the drive to make it happen, and a co-founder who shares your vision. But here's the thing: according to research, up to 65% of startups fail because of co-founder conflicts. Not market conditions, not funding issues, but disagreements between the people who started it all. In this episode of Ondernemerspraat, we sat down with Lauren De Brauwer and Maxim Van Eeckhout from Mace Legal. They work with founders every day on fundraising, shareholder structures, and growth. And they see the same problems over and over: unclear agreements, mismatched expectations, and conversations that happen way too late. ### Why Most Co-Founder Conflicts Happen Let's be real. When you're starting a business, you're not thinking about what happens if things go wrong. You're thinking about product launches, customer acquisition, and getting that first round of funding. But ignoring the tough conversations early on is like building a house without a foundation. Lauren and Maxim see it all the time. Founders assume they're on the same page, but they never actually check. One co-founder might think they're building a lifestyle business, while the other wants to scale fast and sell. Or maybe one person is putting in 60-hour weeks while the other is working part-time. These differences don't just cause friction--they can destroy the company.  ### The Shareholder Agreement: Your Business Prenup Here's the thing: a shareholder agreement is basically a prenuptial agreement for your business. Lauren and Maxim call it the "business marriage contract." It's not romantic, but it's essential. Think of it as the rulebook for how you and your co-founders will work together, especially when things get messy. What should this agreement cover? A lot, actually. Here are the key pieces: - **Equity split**: Who owns what percentage of the company? And how does that change over time? - **Vesting schedule**: If a co-founder leaves after six months, do they keep their full stake? Probably not. Vesting protects the company. - **Decision-making power**: Who gets the final say on major decisions? What needs a unanimous vote? - **Exit scenarios**: What happens if someone wants to sell their shares? Or if the company gets acquired? - **Roles and responsibilities**: What is each founder expected to do? And what happens if they don't deliver? These aren't just legal details. They're the difference between a smooth-running partnership and a messy breakup that costs you everything.  ### What Happens When a Co-Founder Checks Out Let's say your co-founder loses interest. They stop showing up, stop contributing, and you're left carrying the weight. Without a clear agreement, you're stuck. They still own their shares, they still have voting rights, and you can't just kick them out. A good shareholder agreement handles this. It might include a "bad leaver" clause that lets the company buy back their shares at a discount. Or a vesting schedule that ensures they only earn their equity over time. These mechanisms protect the business and the founders who are actually doing the work. ### How to Prevent Internal Conflicts The best way to avoid conflict? Talk about it early. Have the hard conversations before you need them. Lauren and Maxim recommend sitting down with your co-founders and writing out your expectations. What are your goals? How much time will you commit? What happens if one of you wants to leave? And get it in writing. A verbal agreement is not a contract. Even a simple document drafted by a lawyer can save you thousands of dollars and countless headaches down the road. ### Practical Steps for Sustainable Partnership Here's what you can do right now: - **Schedule a co-founder check-in**: Once a month, sit down and talk about how things are going. No agenda, just honest conversation. - **Document everything**: Even if it's just a Google Doc, write down your agreements and update them as things change. - **Get legal help early**: Spend the money on a lawyer now, not later. It's cheaper than litigation. - **Define success together**: Make sure you both know what you're working toward. Alignment matters. This podcast is brought to you by Creatic. We help small and medium businesses build strong digital brands with smart branding, thoughtful marketing, and high-performing websites. From brand strategy and visual identity to a website that actually drives results, we make sure your business grows online in a way that's visible and recognizable. Curious what we can do for you? Check us out at [creatic.com](https://www.creatic.com) (nofollow). ### Final Thoughts Building a business with a co-founder is like a marriage. It takes trust, communication, and a solid agreement. Don't let your startup become another statistic. Have the tough conversations, get it in writing, and build a partnership that can weather any storm.