Cofounder Split After One Side Built Everything
Early contributors to startups often find themselves in situations where their initial equity or compensation doesn't reflect their significant contributions to the company's growth and vision. This can lead to feelings of being undervalued, exploited, and a desire to leave, especially when fundraising rounds introduce new power dynamics and demands. The pain is compounded by a lack of understanding of equity structures early on.
SOURCES (60)
“Can you give more details? Do you mean the business received a K-1 with 500k on it, or the business earned 500k and it will be allocated to the partners on their K-1s? Is it a gain? Was it not on their financial statements? Or…”
“Reasonable approach is to either: 1. Give him zero or a one time payment of like $20-25k and keep 100%. If there is no vesting agreement it is all "good will". Shutter the existing company, open a new one and spend a couple thousand in Claude credits rebuilding. Note: if he put money in you should reimburse him (maybe with suitable interest). Because from a balance sheet perspective any money put in is either paid in capital, a loan, or a reimbursable expense.”
“I had a similar situation and here is what I did, DO NOT under any circumstances give 50% of anything to your SO, if she wants any stake on the business yell her she can buy a stake in to the LLC not as a co founder because she is NOT but as a business partner, set her clear roles and responsibilities and make her sign a contract as a Business investor and her earnings will be upon performance and only after profit never as revenue. Give her a stake of5% and be sure to draft the contract with a”
“This is where signed contracts up front are critical. Also, a shotgun clause is also a critical part of such a contract. One huge problem with many tech/business partnerships is that the tech person often is alone with the tech and builds the critical value very early on. This could be the value which got the first angel investor, the first VC, the first customers etc. Yes, the business half may do sales, etc. Once the company had "real" value, there is a fairly good chance that the te”
“Employees often get equity and larger slices for early employees vs those who come later. 50% is absurd, 5%? Not unheard of. Why would anyone join your company otherwise? The whole point of people joining startups and putting in the work is the hope their equity converts into something someday. You should do a standard 4 year vesting schedule for her and everyone else who joins. If you intend to keep 100% just know you’ll struggle to recruit and retain good people, 100% of $0 is $0.”
“i started building this SaaS solo in late 2023. It helps indian founders collect USD/EUR without conversion fees. I went all-in in april 2025. By december, my girlfriend joined to handle support and outreach, and we hired one employee. revenue has grown every month since. We never signed any agreement. no salary, no equity. I just gave her a cut of the profits when we had extra (sometimes more than I kept). our employee works remote, stays on a flat salary with no equity talk, which she sees eve”
“Give him a 15% option, not shares that he can exercise if you sell in the next five years, but have 3% exoire each year. No sale, they expire. Allows him to capture upside if you sell in the short term, but realistically they'll expire or he'll be below 6% when you sell. Plus, future finding rounds dilute him too.”
“Offer 6% passive…or he can take a payout as if he owned 10% today. It’s probably worth a premium to you today to own 100% and have a clean break. You already mentioned going forward you may need to give equity to a new technical person. I’d have thought you would have learned from that first misstep. If you had the idea, front the cash, and built the product, why on Earth would you give up any equity? Structure a profit’s interest agreement, or a commission, or bonuses for achieving milestones,”
“If you honestly think that you will be raising capital int he future, anything above a few % for someone who is no longer there will be a problem. If you sell the company in a couple of years for the piddly sum of 50M and your exited co-founder has 2%, that is still $1M. Did they contribute $1M of value in the time they were there?”
“Maybe for comparison if youre a deeptech company spinning out of a lab its common for an involved professor to get 5-10% of the original flounder split (high end usually gets the founder vs advisor title). Non-involved professors are usually given 3-5% and most of the time thats in recognition of the 5-7 years they hosted the tech founder in the lab and the resources and training provided to start the company, and sometimes as way to align incentives of the one other person who has intimate know”
“What do you think is actually fair here? Would you consider 6% reasonable? Would you go closer to 10% just to settle cleanly? Why not 0%? You don't want dead weight on your cap table Someone with significant shares who did not contribute and is no longer at the company is dead weight”
“First of all, thanks again to everyone who commented on my original post. Through the comments I realized I was spending way too much time trying to find some percentage that would make both of us happy instead of asking the more important question: does this co-founder relationship even make sense anymore? For me, the answer is no. I wanted to talk to him properly in person. The timing was terrible because he had been away longer than expected because of a serious family situation involving a h”
“My husband built a wonderful product, now it’s on me to sell it. Turns out, after all the reading and research, I actually got the hard part/short end of the stick. But I just know better me than him, as I am usually online chronically anyways, may as well put that time to good use. Anyone else in here supporting their spouse and their product? What has worked for you? submitted by /u/BetSilver2687 [link] [comments]”
“You actually have legal rights here, u are not screwed at all- rather your cofounder is. If they called you a cofounder or says your a 50% ANYWHERE in writing, they are liable and rather stupid. The IP is yours and she referred to you as a cofounder/partner.”
“I’ll put it this way. Worked for a company with equity, looked like they could make it. They ultimately sold for penny’s and investors lost massive sums of money. The last raise was 150m like series e and they sold for 100m. They had offers for hundreds of millions in 2021. They didn’t sell, kicked out founder and tanked the company. Even if the company does well enough to exit there is no guarantee they will be smart enough to do so.”
“You are saying that you rebuilt your own version of it, which means conflict of interest. So not exactly what your plan is here? 🤔”
“Think you need a reliable cofounder they can depend on so that their investment is still safe when you inevitably leave.”
“I’ve been on both sides of building companies and investing in them. If I’m wearing an investor hat, it’s absolutely not impossible, but you better have a good reason for leaving after only a few months and a clear vision for why your version will work. The foundational things investors care about aren’t just whether you can build the product. Can you get people to work for you? Lead through adversity? Navigate complexity? Convince people to follow you? Convince customers to buy something new or”
“Background: Small business with two owners, myself and my partner. Started out of my house grew to the point we are now in a small warehouse. Product based business where I do the majority of the physical manufacturing and my partner handles sales, order building and deliveries. By far my biggest issues have been around employees and this latest one has me stuck between being a good person and keeping my business running smoothly. I have one employee at 35 hr a week very generous pay for our are”
“Frankly, why did you leave? Why didn't you say? What's stopping you from repeating the same thing again? Investors would see that as a flight risk, plus should they invest - could the other company sue you for IP / infringement? You started the previous company and left, so do you have equity or paper still? Suss af, the only valid reason is if you're the sauce behind the value prop and that you were severely mistreated and decided to jump. That part requires a ton of trust in that r”
“why did you leave? That answer is the one that should be given to investors, even if its as simple as you think you can do a better job than them.”
“This plus non compete clauses, plus its likely restricted under the original investor terms.”
“The core question that needs to be answered to figure out how to package this is: why you left the other company, and why you still have conviction that this problem needs solving this particular way, despite it not working at that other company for whatever reason.”
“Yeah. Leave that part out in the pitch meeting. You need a very compelling reason why you're leaving the old company to do basically the same thing and why this time it'll be 10x better.”
“You have to decide, all in or nothing. Profit sharing when there is some is a bad plan, on par with figuring ut out since you love each other with the inlaws. 50% is a bit much, but somewhere between 1-10% depending on how much traction you have and how much salary you are willing to pay her sounds reasonable to me. If it was me, i would never accept anything lower than 40% if i was going to agree to a "profit sharing if there is some" deal. She is taking as much risk as you right now”
“Why would you treat her any different than anybody else that you would have brought on board in an early startup phase? You give her a little bit of equity, a couple percent or something, and treat her just like anybody any other "co-founder". Equity with the option to grow with ability to earn more based on their role and input. Tie it to KPI's like revenue targets and or user number targets... There should be no difference in the way you treat her than anybody else.”
“Id ask her to approximate the time she’s spent and the breakdown of her contributions and impact (ex. 20 hrs - marketing campaign setup - resulted in 20% increase in site visitors), as well as any expenses she’s incurred herself (ex. $100 - Google Ad fees). Frame it as an opportunity for her to formally highlight her contributions. It might be more “heavy lifting” than you realized. Also, in the worst case scenario let’s say she rejects the offer and leaves. Will this crush your business? Would”
“No direct sales and/or advertisements for personal gain. This includes spamming. You MAY share your startup in the Share Your Startup thread (stickied at the top of /r/startups )”
“She takes 50% now - dumps you. Dates someone else. You now work for your girlfriends boyfriend.”
“This is a fork in the road to either break up or get married. There's no in between.”
“How confident are you that the startup you could join is going to be a 100x company? Forget about the market, no one can predict when the next crash will happen. The market is the ocean, but you’re not evaluating the ocean, you are evaluating a boat. A bad boat will sink even in th calmest of waters. Will the new boat last 10 years in calm water? How much better can your old boat survive a storm compared to the new? If you take the compensation difference and invest all of it for 10 years, assum”
“Bro if the product is in the ideation stage I dont see why you cant go 50 50 assuming it's 2 founders including yourself. Or equal ways with 3 or 4. Now them having a roadmap is concerning, where are the user interviews, the problems or anything remotely useful. To be fair maybe they provided plenty of material so correct me if I'm wrong, but I've started and stopped SO much work because of ideation obsessed people. They undervalue execution and real work, and love to larp. I would b”
“I can tell you that without signed documents, I'm not touching that, investor wise. I think you need a robust plan of what you are going to do if that PO comes through, and after a year, it evaporates. How do you stay in business? Where else are you scaling?”
“We sold annual and multi year contracts at my last company and yes, we let people pay monthly on an annual term reasonably often... not ideal, but we had the commitnent, that mattered more (it was just more a pain logistcially). The thing I got wrong early was treating it as a discount question. It's a cash flow question wearing a discount costume. Two things that helped once I stopped guessing: Separate the term from the payment schedule in your own head, and price them separately. The term”
“Keep the high cash comp job and invest $25K-$100K into the startup. Position yourself as a “strategic” investor and tell them you’ll funnel deals from your network their way (assuming it doesn’t compete with your day job) if they let you invest. Now you have the best of both worlds.”
“I work at a late-stage pre IPO company in the AI space (not one of the big guys, we operate more in neocloud space) and have a transactions role. I am highly cash compensated (in a good year can make bonus >$1m) but in exchange for that, have pretty much no equity (not an exaggeration). It’s a decently solid company but has tons of bloat and real issues - but good culture, good role, etc. I could be comfortable plugging along there for awhile so long as the company stays afloat (fairly questi”
“kinda agree it’s on them, but “just go to court” is way easier said than done, especially if the actual dollar amount is unclear and you’re burned out from the whole thing. sf startup culture really normalizes this loose verbal‑promise stuff, so a lot of first‑timers learn the hard way.”
“No one likes being taken for granted. You should offer her some kind of steady payment at least. It’s a business not a game. If she is helping you make money keep her on staff as a business decision. If not take her off the project and maybe give her some payment for her time. Be a leader and provide some clarity”
“it is difficult to legally formalise business in my country because taxation after registration hits hard, 30% of all profits from the start in taxes and extremely high paperwork formalities quarterly. Now, the business makes enough that i have to formalise and if i form a limited liability business, i have to have a partner, that's where the gf equity angle comes in”
“I think its fair claim. Give her at least 25% stake considering she has been there with you since the very start. You cant just shake off her only because your relationship isn't on good terms. Search about Jeff Bezos divorce.”
“Yea it's kinda weird she asked when you haven't offered. If it wasn't about the money she wouldn't have asked and I'm sure you would've given it in time.”
“Man you have a lot of interpersonal problems in this business. Last week it was your former friend/partner that "stole your idea" and built a competing business while you didn't make any progress on it for a couple of years. You should see a pattern here that you need to formalize these business relationships earlier and not let things go sideways until there is a problem.”
“That sounds interesting. Did you move everything over at once or start with one part of the finance setup?”
“More founders need to share your attitude (especially on Reddit). I’ll make sure I create that post.”
“I promise you that your life is geometrically by an order of magnitude easier the longer you bootstrap. It’s still hard but you’ll shift the power dynamic to your side. However, don’t be afraid to start conversations now.”
“I’m genuinely curious. Do you mind explaining you meant by this comment? Were you offended?”
“Thank you for this language, it's very helpful and we will certainly use it. Same thoughts here re: the firm. We're looking elsewhere as it's been a goose chase.”
“rewrite the role split around decisions, deadlines, and a fallback owner. finance can stay his domain, but missing the agreed deadline should automatically transfer execution authority so the next payout hold cannot become another relationship argument”
“For anyone doing any kind of partnership. Look into shotgun clauses. It doesn't instantly resolve this particular problem, but it does offer a solution for when one partner thinks they can dig their heels in and win. Even if you don't exercise it, the threat is always there, and people suddenly become more rational (usually). A friend of mine had a pair of agreements which saved him; one was the shotgun clause. The other was that any time one partner signed a contract, spent, etc without”
“I have dealt with this multiple times in multiple companies. The bottom line is that you can either address it head-on right now, or you can have a serious problem down the line. You will waste an unbelievable amount of your time if you do not tackle it head-on. A partner should not be somebody who you are constantly fighting with because they think they deserve more than they do. A partner should not be somebody that you have to worry about getting their job done. If you find yourself anxious d”