A founder agreement is the contract co-founders wish they had signed once the first real dispute arrives. It answers, in advance and in writing, the questions that destroy young companies: how equity is split and earned over time, who does what, who decides what, who owns the work product, and what happens to a departing founder's shares. None of these questions gets easier to answer after money, customers, or resentment enter the picture.
You do not need a fundraise or even revenue to justify one. The moment two or more people are building something together with the intent to share ownership, the default rules of state corporate or LLC law are already governing you — and those defaults almost never match what founders would actually choose.
The equity split: fairness now versus fairness over time
Equal splits are common because they are easy, not because they are analyzed. A better conversation prices each founder's actual inputs: cash invested, intellectual property contributed, full-time versus part-time commitment, opportunity cost, domain expertise, and who takes which risks for how long. A founder going full-time without salary is making a contribution a part-time founder is not, and the split should reflect the plan, not just the founding-day snapshot.
Whatever number you choose matters less than making every founder's equity subject to vesting. Vesting converts the split from a grant into an earn-out: shares are owned outright only as time passes or milestones are hit, and the company can repurchase unvested shares from anyone who leaves early.
| Structure | How it works | Protects against | Trade-off |
|---|---|---|---|
| Time-based with cliff | Typically four years of monthly vesting with a one-year cliff — nothing vests until month 12, then monthly | A founder leaving in the first year with a large stake | Can feel harsh to founders who joined pre-formation and already contributed |
| Back-credited vesting | Same schedule, but the clock starts at the date real work began, not the signing date | Undervaluing pre-incorporation work | Requires honest agreement on when "work" started |
| Milestone-based | Tranches vest on shipping a product, revenue targets, or a financing | Time-servers who contribute little | Milestones are disputable; drafting them precisely is hard |
| Acceleration triggers | Single-trigger (vesting speeds up on acquisition) or double-trigger (acquisition plus termination) | A founder being fired right before their equity would vest, or losing it in a sale | Heavy single-trigger acceleration can make the company less attractive to acquirers |
Watch out: Founders who receive stock subject to vesting should evaluate the Section 83(b) election immediately. Under 26 U.S.C. § 83, restricted stock is normally taxed as it vests — at whatever the shares are worth then. An 83(b) election taxes everything up front at today's (usually trivial) value instead, but it must be filed with the IRS within 30 days of the stock's transfer. The deadline is rigid, and a missed filing cannot be fixed later. Confirm the current mechanics through the IRS Small Business and Self-Employed center or a tax adviser before shares are issued.
Roles, titles, and who decides what
Equity answers "who owns"; governance answers "who decides." A founder agreement (or the operating agreement and bylaws it feeds) should separate the two cleanly. Day-to-day authority belongs to defined roles — who signs contracts, who hires, who controls the bank account and at what dollar threshold. Major decisions belong to a defined list requiring board approval, a supermajority, or unanimity: issuing new equity, taking on debt beyond a limit, selling the company, changing founder compensation, admitting a new founder.
Then plan for deadlock, especially with two founders at 50/50. Options include giving one founder a tie-breaking vote in a defined domain, appointing a mutually trusted third director or advisor as tiebreaker, escalation-then-mediation clauses, and, as a last resort, buy-sell mechanisms (one founder names a price; the other must buy or sell at it). A deadlock clause you never use costs a paragraph. A deadlock without one can cost the company, since courts in many states can order dissolution of a hopelessly deadlocked entity — the corporate equivalent of the outcome described in our guide to closing a business correctly, except involuntary.
Intellectual property: getting the work into the company
Investors and acquirers routinely find the same defect in diligence: a founder built the core product before incorporation and never assigned it, so the company does not clearly own its own technology. The fix is cheap at formation — each founder signs an assignment transferring relevant pre-existing IP to the company (usually as part of the consideration for their shares) plus a confidentiality and invention-assignment agreement covering everything created going forward.
Two complications deserve attention. First, a founder moonlighting from another job may have signed an invention-assignment agreement with that employer; work done on the employer's time or equipment can belong to the employer under it. Second, contractors — including friends who "helped with the app" — own their work by default under copyright law absent a written assignment, and "work made for hire" language does not cure that for most software. The fix is a real engagement document, which is why a contractor agreement has to carry an express assignment clause alongside terms that describe how the work is actually controlled. Collect signed assignments from everyone who touched the product, early, while relationships are good.
Departure terms: the clause you are really signing for
Most founder agreements earn their keep at exactly one moment — when a founder leaves. Draft that moment in detail while everyone still likes each other.
- What triggers a repurchase? Voluntary resignation, termination for cause, termination without cause, death, and disability usually get different treatment. Define "cause" concretely — fraud, felony, persistent failure to perform documented duties — because a vague definition invites litigation.
- What can the company buy back, and at what price? Unvested shares typically return at cost or for nothing. Vested shares are the fight: some agreements let the company repurchase them at fair market value on certain exits; others let departed founders keep vested equity. Specify the valuation method — an agreed formula, an independent appraisal, or the latest financing price — before anyone has a reason to game it.
- How is payment made? Companies rarely have cash to buy out a founder in a lump sum. Installment payments over two to five years, with interest and security, keep a buyback from bankrupting the business.
- What restraints follow departure? Confidentiality survives. Nonsolicitation of employees and customers is common. Noncompetes are enforceable in some states, banned or restricted in others — and if a departing founder personally guaranteed company debt, that exposure needs to be unwound too, a problem covered in our guide to personal guarantees in business deals.
- Transfer restrictions for everyone. Rights of first refusal, co-sale rights, and prohibitions on transferring shares to outsiders keep a stranger — or an ex-spouse in a divorce — from becoming your business partner without consent.
Practical step: Put a dispute-resolution ladder in the agreement now: direct negotiation, then mediation, then arbitration or a chosen court, with a named governing law. When a departure goes badly, the ladder determines whether the fight costs thousands or hundreds of thousands — and if a dispute does erupt over the agreement itself, the remedies framework in what happens after a contract is breached shows what each side can realistically demand.
Formalities founders skip, and shouldn't
Founder stock is still stock. Issuances must comply with federal and state securities laws — private issuances typically rely on exemptions, but the paperwork documenting them matters, and the SEC materials on exempt offerings are worth a founder's reading time before any equity goes to friends, advisors, or early hires. Keep a real cap table from day one, record board consents for every issuance, and document loans from founders as loans. The SBA maintains plain-language guidance on entity choice and startup formalities that pairs well with state-specific advice from counsel.
Quick answers
Is a founder agreement legally required?
No state requires one. But without it, default state law and whatever fragmentary documents exist — emails, a handshake split, a form operating agreement — govern your most valuable relationships. Defaults often mean equal management rights regardless of contribution, no vesting, no buyback rights, and no deadlock mechanism. The agreement replaces those defaults with terms you actually chose.
Can we just use a template we found online?
A good template is a useful checklist and a poor finished product. Templates rarely handle your state's specific rules on noncompetes and repurchase rights, tax elections, IP already created before formation, or asymmetric contributions. A common middle path: negotiate the business terms among founders using a term-sheet-style summary, then pay a lawyer for a focused engagement to paper them correctly.
One founder already left before we signed anything. Now what?
Their rights are governed by whatever exists: state default law, any stock issuance documents, and provable oral agreements. Options include negotiating a separation and repurchase now — often trading a modest payment for a clean release and IP assignment — or living with an absentee shareholder. Get the resolution in writing regardless; ambiguity compounds at every future financing or sale.
Do solo founders need any of this?
Less of it, but not none. A solo founder still benefits from assigning pre-formation IP into the company, documenting equity issuance properly, evaluating an 83(b) election if shares vest, and adopting transfer and succession terms — what happens to the company if the founder dies or is incapacitated. Future investors and early employees will also expect clean records from the start.
What is the difference between a founder agreement and an operating agreement?
In an LLC, the operating agreement is usually where founder terms live, so one document can do both jobs. In a corporation, "founder agreement" is shorthand for a bundle: restricted stock purchase agreements with vesting, IP assignments, a shareholders' agreement with transfer restrictions, bylaws, and board consents. The label matters less than making sure every term has an enforceable home somewhere.
Your next moves
Have the awkward conversation now, while it is still hypothetical: split, vesting, roles, decision rights, and departure terms. Reduce it to a signed term sheet, then get it papered properly for your entity type and state. Calendar the 83(b) deadline the day restricted shares are issued. Collect IP assignments from every founder and contributor. And revisit the agreement at each major change — a new founder, a financing, a pivot — rather than letting it fossilize. For the neighboring questions of contracts, guarantees, and winding down, the Business Formation & Contracts pathway is the place to continue.