View contents
Article
Startup Guide

4 Written Agreements Before Finding a Cofounder

2026.10.30·6 min·OPENSEED
MENTORING KNOWLEDGE FORTeam EvaluatorRisk AnalystChief Analyst

Before recruiting a cofounder — before even making an offer — four items must be settled in writing. Without vesting, buyback, and lock-up provisions, a departed cofounder can retain their shares and block decisions, with no legal path to reclaim them (LawTalk).

Intro.

#Why This Starts Before the Search, Not Just Before the Contract

A founder holds two simultaneous legal statuses: shareholder (voting rights and property rights) and officer/employee (work performance and compensation). These are legally separate — which means that without a specific agreement, shareholder status and equity survive even after someone leaves the company.

Once someone joins the team and sits at the negotiating table, they're already expecting equity. If you only said 'I'll give you equity' verbally before they joined, adjusting those terms afterward is far harder — legally and psychologically. Before the offer is the only moment when terms can be negotiated on equal footing.

주의
If only a verbal agreement exists, the starting point is renegotiating and formalizing everything in writing. If someone has already joined, a practical alternative is a current-value share transfer combined with stock options granted upon future full-time commitment.
02

#1 — Role Separation and Decision Authority

Each cofounder's responsibilities (marketing, accounting, HR, business planning, R&D, IT, etc.) must be specified in writing to establish clear role separation and accountability. Decide together who can make which decisions unilaterally, and which decisions require mutual agreement.

Decision TypeSolo Decision AllowedWhat to Agree On
Hiring/firing in own domainCofounder in charge, solo (draft basis)Whether key roles or above-threshold comp require joint approval
Marketing/operations budgetCofounder in charge, solo (within limit)Spending cap and process for exceeding it
Accepting/rejecting investmentNo — solo not permittedRequired joint consent
Amending articles or equity structureNo — solo not permittedRequired joint consent

An even-numbered board can create deadlock where nothing passes, so an odd number is recommended. In a 50:50 equity setup, deadlock-breaking mechanisms — put/call options or referral to a professional arbitration body — should be built into the shareholder agreement in advance so there's an actual remedy if a dispute arises.

03

#2 — Equity Calculation Criteria

Equity stake directly determines operating control, profit distribution, and fundraising leverage. Base the split on initial contributions (capital, idea, technology, network), but document the specific items and their weightings at the time of agreement — otherwise 'I contributed more' disputes arise later.

Contribution ItemHow to MeasureAdditional Items to Confirm
Capital investedDollar amount contributedHow equity dilutes on follow-on investment
Idea / IPOriginal business model contribution; patents filedConfirm IP is separately assigned to the company
Technology / developmentMVP development period; code contribution scopeFull-time status and hours committed
Network / channelKey customers or partners sourcedWhether contributions will continue going forward

Full-time commitment is a variable that can't be left out of equity calculation. Clawing back equity from a cofounder who participates part-time is legally difficult — the presence or absence of vesting and return provisions in the shareholder agreement is decisive.

04

#3 — Vesting Schedule

Vesting means full ownership of shares is recognized only after working for the agreed period. Without a vesting structure, a cofounder who leaves early retains their equity and can still influence decisions — and recovering those shares legally is very difficult.

Before drafting a contract, both parties need to agree in principle on the four items below. Handing over a draft contract without that prior agreement means the other person first sees the terms just before signing — and negotiating power tilts to one side.

  1. Total vesting period: agree on the minimum duration you expect continued participation from each cofounder.
  2. Cliff: the minimum tenure required before vesting begins; if someone exits before the cliff, no share ownership is recognized for that period.
  3. Vesting unit: after the cliff, decide whether remaining equity vests monthly or quarterly.
  4. Acceleration clause: decide in advance how any remaining unvested shares are handled in the event of an M&A or funding event.
TIP
The specific numbers (how many years or months) vary by team situation and business stage. Consult a legal professional when drafting the shareholder agreement.
05

#4 — Share Handling Upon Exit

Share handling on exit only becomes meaningful when designed alongside vesting. A buyback is the right for the company or remaining shareholders to repurchase a departing person's shares. Without it, a departed cofounder can retain equity, sell externally, or continue exercising voting rights.

Exit ScenarioHandling MethodWhat to Specify in the Agreement
Voluntary exit during vesting periodUnvested shares returned to companyRepurchase price basis (par value vs. fair market value)
Involuntary exit during vesting periodSpecify remaining vesting treatment separatelyStandard for determining fault
Exit after vesting completesShares retained; lock-up period appliesLock-up duration (typically 3–5 years in practice)
Deadlock situationPut/call options or arbitration rulingDeadlock resolution procedure specified in advance

Lock-up periods of 3–5 years are typical in practice. Deadlock resolution mechanisms — referral to a professional arbitration body or a share buyout — must also be specified in the agreement in advance so there's an actionable remedy when a real dispute occurs.

Summary.

#How These Four Agreements Tie Into the Team Section of Your Business Plan

In government grant programs and investment reviews, the team section is never just a list of résumés. A team without clear role separation and decision authority is classified as a team risk. Reviewers ask about the equity structure and the rationale behind it — and if there's no vesting design, they conclude the team hasn't prepared for an exit scenario.

Before submitting a business plan, you should be able to answer all four questions below. Any question you can't answer points to a structural problem that needs to be resolved before — not after — you file the plan.

  • Can you describe each cofounder's role in specific task units?
  • Can you explain the equity distribution tied to specific early-contribution items?
  • Is there a vesting structure in place, or a concrete plan to establish one?
  • Can you explain how business continuity is secured if a cofounder exits?

Sources

Advertisement

If your team structure is reading as a risk in your business plan

OpenSeed can show you how your team composition, role separation, and equity rationale come across from a reviewer's perspective.

Pre-submission business-plan review with clear service limitations

Start OpenSeed Review →

관련 AI 피드백 서비스.

AI 피드백
사업계획서 AI 추천 →
AI 피드백
사업계획서 피드백 →
AI 피드백
창업지원사업 합격 →
RELATED · Related pagesStartup Guide
Cap Table Management — From Founding to Series A2026.11.04 · 7 minFirst 3 Months After Incorporating: Tax, Insurance & Corporate Account Admin Checklist2026.11.05 · 7 minBusiness Plan BEP — Answer 'When Do We Break Even?' Not Just Show the Formula2026.10.21 · 6 minWhy 'We Also Plan to Enter International Markets' Costs You Points in Your Business Plan2026.10.19 · 6 minStartup Corporate Tax Relief, Venture Certification & Angel Investment Deduction — How to Include Them in Your Financial Plan2026.10.18 · 7 min
Backlinks · Pages that link here
External Advisor Team CreditC-Level DisputesCap Table BasicsCo-Founder Dispute PatternsThe 50/50 Equity TrapCo-Founder Risk DiagnosisCo-Founder Vesting DesignFounder Equity Dilution SimulationSeed IR Deck StructureTerm Sheet Key Clauses
← Back to Wiki