Two friends start a company. One says "we are equal partners, right?" The other says "of course." They split 50/50, shake hands, and never write anything down. Eight months later, one of them is working 60 hours a week and the other has gone quiet. Now the equity is not a detail. It is the entire fight.
This pattern is so common it has a name in the startup world: dead equity. Shares owned by someone who no longer contributes. It scares away investors, poisons the cap table, and turns a friendship into a lawsuit. Almost all of it is preventable with two decisions made in week one: a defensible split and a vesting schedule.
Equal feels safe. It avoids the awkward conversation. That is exactly why it fails.
- Contributions are almost never equal. One of you had the idea, quit a job, put in savings, or brings the rare skill. Pretending otherwise just postpones the argument to a worse moment.
- 50/50 creates deadlock. No tiebreaker means every hard decision, pivot, hire, fundraise, can stall the company. Investors see a 50/50 split with no vesting and read it as "these founders have never had a hard conversation."
- Fair is forward-looking, not emotional. The split should price the next four years of work, not the last four weeks of excitement.
A better starting point is a weighted framework. Score each founder, roughly, on five things: who had the idea and validated it, who is full-time and who is not, who brings irreplaceable skills, who is taking the salary cut or putting in cash, and who has the network or track record that raises the company's odds. You do not need a formula with decimal points. You need both people to say the quiet parts out loud.
In practice, most two-founder splits that survive land somewhere between 55/45 and 70/30. A 60/40 split between two committed full-time founders is not an insult. It is an acknowledgment that someone is carrying a little more, and it leaves a natural CEO with the deciding vote.
Here is the mechanism that makes equity survivable: nobody owns their shares on day one. They earn them over time.
The standard is 4-year vesting with a 1-year cliff, and it exists for a reason.
- The 1-year cliff. Zero shares vest until month 12. If a founder leaves at month 6, they walk away with nothing. This is not cruel. Six months of work did not build the company, and the remaining founders need that equity to hire a replacement.
- Monthly vesting after the cliff. At month 12, 25% vests at once. The remaining 75% vests monthly over the next 36 months. Stay 2 years, keep half. Stay 4 years, keep it all.
- Everyone vests, including the CEO. Especially the CEO. Vesting protects founders from each other, and it tells investors the team is locked in for the long game.
- Acceleration on acquisition. Many agreements add that unvested shares speed up if the company gets acquired. Decide this on day one, not during a term sheet.
Run the math on the two versions of the same story.
Without vesting. Your co-founder leaves at month 6 with their full 50%. You grind for four more years, raise money, and build something real. They own half of it from a beach. Every investor you pitch asks why a stranger owns half your company. Some walk. Your friendship is already over, and now it is also expensive.
With vesting. They leave at month 6, before the cliff. They keep 0%. The company buys back or cancels the unissued shares, the cap table stays clean, and you use that pool to recruit the person who actually stays. Maybe the friendship survives, because there was nothing to fight over. The agreement had the fight for you, in advance, when you were still on good terms.
Same departure. Same six months of work. Completely different endings. The only variable was paperwork signed in week one.
- Have the number conversation this week. Sit down with your co-founder and each write your proposed split on paper before you say it out loud. If the numbers differ, talk about why. That gap is the real conversation.
- Put 4-year vesting with a 1-year cliff in writing. A founders' agreement or restricted stock purchase agreement is standard paperwork. A startup lawyer or a solid template gets this done in days, not months.
- Write down the departure terms now. What happens to unvested shares, what happens to vested shares, who can buy them back and at what price. Agree while you still like each other.
We covered how to find the right person in Your Co-Founder Search Is Backwards. This is what you do once you find them. If you are still at the idea stage and weighing structures, LLC or C-Corp is the next read. And if the equity talk surfaces bigger doubts about doing this alone versus together, Solo Founder or Bust will help you pressure-test the partnership before you sign anything.
Two friends start a company. One says "we are equal partners, right?" The other says "of course." They split 50/50, shake hands, and never write anything down. Eight months later, one of them is working 60 hours a week and the other has gone quiet. Now the equity is not a detail. It is the entire fight.
This pattern is so common it has a name in the startup world: dead equity. Shares owned by someone who no longer contributes. It scares away investors, poisons the cap table, and turns a friendship into a lawsuit. Almost all of it is preventable with two decisions made in week one: a defensible split and a vesting schedule.
Equal feels safe. It avoids the awkward conversation. That is exactly why it fails.
- Contributions are almost never equal. One of you had the idea, quit a job, put in savings, or brings the rare skill. Pretending otherwise just postpones the argument to a worse moment.
- 50/50 creates deadlock. No tiebreaker means every hard decision, pivot, hire, fundraise, can stall the company. Investors see a 50/50 split with no vesting and read it as "these founders have never had a hard conversation."
- Fair is forward-looking, not emotional. The split should price the next four years of work, not the last four weeks of excitement.
A better starting point is a weighted framework. Score each founder, roughly, on five things: who had the idea and validated it, who is full-time and who is not, who brings irreplaceable skills, who is taking the salary cut or putting in cash, and who has the network or track record that raises the company's odds. You do not need a formula with decimal points. You need both people to say the quiet parts out loud.
In practice, most two-founder splits that survive land somewhere between 55/45 and 70/30. A 60/40 split between two committed full-time founders is not an insult. It is an acknowledgment that someone is carrying a little more, and it leaves a natural CEO with the deciding vote.
Here is the mechanism that makes equity survivable: nobody owns their shares on day one. They earn them over time.
The standard is 4-year vesting with a 1-year cliff, and it exists for a reason.
- The 1-year cliff. Zero shares vest until month 12. If a founder leaves at month 6, they walk away with nothing. This is not cruel. Six months of work did not build the company, and the remaining founders need that equity to hire a replacement.
- Monthly vesting after the cliff. At month 12, 25% vests at once. The remaining 75% vests monthly over the next 36 months. Stay 2 years, keep half. Stay 4 years, keep it all.
- Everyone vests, including the CEO. Especially the CEO. Vesting protects founders from each other, and it tells investors the team is locked in for the long game.
- Acceleration on acquisition. Many agreements add that unvested shares speed up if the company gets acquired. Decide this on day one, not during a term sheet.
Run the math on the two versions of the same story.
Without vesting. Your co-founder leaves at month 6 with their full 50%. You grind for four more years, raise money, and build something real. They own half of it from a beach. Every investor you pitch asks why a stranger owns half your company. Some walk. Your friendship is already over, and now it is also expensive.
With vesting. They leave at month 6, before the cliff. They keep 0%. The company buys back or cancels the unissued shares, the cap table stays clean, and you use that pool to recruit the person who actually stays. Maybe the friendship survives, because there was nothing to fight over. The agreement had the fight for you, in advance, when you were still on good terms.
Same departure. Same six months of work. Completely different endings. The only variable was paperwork signed in week one.
- Have the number conversation this week. Sit down with your co-founder and each write your proposed split on paper before you say it out loud. If the numbers differ, talk about why. That gap is the real conversation.
- Put 4-year vesting with a 1-year cliff in writing. A founders' agreement or restricted stock purchase agreement is standard paperwork. A startup lawyer or a solid template gets this done in days, not months.
- Write down the departure terms now. What happens to unvested shares, what happens to vested shares, who can buy them back and at what price. Agree while you still like each other.
We covered how to find the right person in Your Co-Founder Search Is Backwards. This is what you do once you find them. If you are still at the idea stage and weighing structures, LLC or C-Corp is the next read. And if the equity talk surfaces bigger doubts about doing this alone versus together, Solo Founder or Bust will help you pressure-test the partnership before you sign anything.