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Co-founder Partnership Agreement

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CO-FOUNDER PARTNERSHIP AGREEMENT

This Co-founder Partnership Agreement ("Agreement") is entered into as of by and between (Founder 1), with principal mailing address , and (Founder 2), with principal mailing address .

RECITALS

WHEREAS, the Founders desire to associate themselves as co-founders for the purpose of developing, operating and commercializing the business described as ;

WHEREAS, the Founders wish to set forth their respective rights, obligations, capital contributions, equity ownership, governance, and procedures for resolving disputes;

WHEREAS, the Founders intend that the business operate under the core terms and conditions set forth in this Agreement and any schedules attached hereto;

NOW, THEREFORE, in consideration of the mutual covenants and agreements contained herein, the parties agree as follows:

1. DEFINITIONS

1.1 "Company" means the business formed by the Founders for the purposes set forth in this Agreement. "Intellectual Property" means all inventions, discoveries, designs, copyrights, trademarks, trade secrets, know-how and other proprietary rights created, conceived or reduced to practice by a Founder that relate to the business.

2. FORMATION AND PURPOSE

2.1 Formation. The Founders agree to form and operate the business as a partnership, corporation or other entity as agreed in writing. The initial entity form shall be: LLC Corporation Partnership

2.2 Purpose. The Company's primary business activities shall be limited to those reasonably necessary to develop, market and commercialize the products and services described in Section 1.

3. CAPITAL CONTRIBUTIONS; EQUITY

3.1 Initial Contributions. Each Founder shall make the initial capital contribution set forth opposite such Founder's name below. Additional contributions shall be made only with the unanimous written consent of the Founders.

3.2 Additional Capital. If additional capital is required, the Founders may contribute on a pro rata basis according to ownership percentages or agree otherwise in writing. Failure to contribute when required shall entitle the non-defaulting Founder(s) to remedies provided in this Agreement.

4. VESTING

4.1 Vesting Schedule. Equity issued to each Founder shall be subject to a vesting schedule as follows: commencement date ; cliff period ; total vesting period .

4.2 Acceleration. Vesting acceleration upon termination, change of control or disability will occur only as expressly provided in a separate written agreement or amendment signed by the Founders.

5. MANAGEMENT, ROLES AND DECISION MAKING

5.1 Roles. The initial roles and responsibilities of the Founders are:

5.2 Voting and Major Decisions. Except as otherwise provided, major decisions affecting the Company (including issuance of equity, sale of the Company, incurrence of debt above , or amendments to this Agreement) require the unanimous written consent of the Founders.

6. INTELLECTUAL PROPERTY

6.1 Assignment. Each Founder hereby assigns and agrees to assign to the Company all right, title and interest in and to all Intellectual Property created, conceived, or reduced to practice by such Founder during the term of the Founders' involvement with the Company that relates to the Company's business.

6.2 Further Assurances. Each Founder shall execute and deliver such further instruments and take such further actions as the Company reasonably requests to perfect, maintain or enforce the Company's rights in the Intellectual Property.

7. CONFIDENTIALITY

7.1 Obligation. Each Founder shall hold in strict confidence all confidential and proprietary information of the Company and shall not disclose such information except to the extent necessary for the performance of duties for the Company or as required by law. This obligation shall survive termination of this Agreement for a period of .

8. RESTRICTIVE COVENANTS

8.1 Non-Compete and Non-Solicit. During the Founder's involvement with the Company and for a period of following termination, each Founder shall not (a) engage in a business that competes materially with the Company within ; or (b) solicit employees, contractors or customers of the Company. Such covenants shall be enforceable to the maximum extent permitted by law.

9. TRANSFERS; RIGHT OF FIRST REFUSAL

9.1 Restrictions. No Founder may transfer, pledge or encumber any equity interest in the Company except in accordance with this Agreement. Prior to any proposed transfer, the transferring Founder must provide written notice describing the proposed transfer and the price and terms.

9.2 Right of First Refusal. The non-transferring Founder(s) shall have a right of first refusal to acquire the offered interest on the same terms and conditions as the proposed transfer. Election to purchase must be made in writing within days of receipt of the notice.

10. DEPARTURE, DISABILITY, AND DEADLOCK

10.1 Voluntary Departure. A Founder who voluntarily resigns shall give not less than days' written notice. Equity treatment on departure shall follow the vesting and buyout provisions agreed in writing.

10.2 Disability or Death. In the event of a Founder's permanent disability or death, the Company shall follow the buy-sell mechanism set forth in a separate instrument or, if none exists, as mutually agreed by the surviving Founder(s).

11. ACCOUNTING, BANKING AND DISTRIBUTIONS

11.1 Records. The Company shall maintain complete and accurate books of account in accordance with generally accepted accounting principles consistently applied. Each Founder shall have reasonable access to those records.

11.2 Bank Accounts. Company funds shall be deposited in bank accounts in the Company's name. Withdrawals over shall require signatures of both Founders or such other arrangement as agreed in writing.

11.3 Distributions. Distributable cash shall be allocated and distributed to the Founders in proportion to their ownership percentages, subject to retention for working capital, tax obligations, and reserves as reasonably determined by unanimous consent.

12. DISSOLUTION

12.1 Events Causing Dissolution. The Company may be dissolved upon the unanimous written agreement of the Founders, entry of a decree of judicial dissolution, or other events required by applicable law.

12.2 Winding Up. Upon dissolution, the Company's assets shall be liquidated, creditors paid, and remaining assets distributed to the Founders in accordance with this Agreement and applicable law.

13. DISPUTE RESOLUTION

13.1 Negotiation and Mediation. In the event of any dispute arising out of or relating to this Agreement, the Founders shall first attempt in good faith to resolve the dispute through negotiation. If unresolved within 30 days, the Founders shall submit the dispute to non-binding mediation.

13.2 Arbitration. If the dispute is not resolved through mediation within 60 days of referral, the dispute shall be finally resolved by binding arbitration conducted in accordance with the agreed arbitration rules. The arbitrator's decision shall be final and enforceable in any court of competent jurisdiction.

14. NOTICES

14.1 Delivery. All notices required or permitted under this Agreement shall be in writing and delivered by hand, nationally recognized overnight courier, or certified mail, return receipt requested, to the addresses set forth below or to such other address as a party designates by notice in accordance with this Section.

15. AMENDMENT; WAIVER

15.1 Amendment. This Agreement may be amended, supplemented or modified only by a written instrument signed by all Founders.

15.2 Waiver. No waiver of any provision of this Agreement shall be effective unless in writing and signed by the party against whom the waiver is asserted.

16. GOVERNING LAW; ENTIRE AGREEMENT; SEVERABILITY

16.1 Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the state of , without regard to principles of conflicts of law that would apply the laws of another jurisdiction.

16.2 Entire Agreement. This Agreement, including any schedules and written instruments executed contemporaneously herewith, constitutes the entire agreement among the Founders with respect to its subject matter and supersedes all prior and contemporaneous understandings, agreements, representations and warranties, both written and oral.

16.3 Severability. If any provision of this Agreement is held to be invalid, illegal or unenforceable in any respect by a court of competent jurisdiction, the remaining provisions shall remain in full force and effect and the parties shall negotiate in good faith to replace the invalid provision with a valid provision that achieves, to the extent possible, the original economic and legal intent.

17. COUNTERPARTS; ELECTRONIC SIGNATURES

17.1 This Agreement may be executed in counterparts, each of which shall be deemed an original and all of which together shall constitute one instrument. Signatures delivered by facsimile or electronic transmission shall be deemed original signatures for all purposes.

IN WITNESS WHEREOF, the Founders have executed this Agreement as of the Effective Date first written above.

Founder 1:

By:

Date:

Founder 2:

By:

Date:

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What a Co-founder Partnership Agreement Is and When It Applies

A Co-founder Partnership Agreement is a written contract that records the rights, responsibilities, equity allocations, financial contributions, decision-making rules, and exit mechanics among the founders of a business. It defines vesting schedules, intellectual property ownership, capital commitments, dispute resolution, and procedures for transfer or buyout, providing a clear reference point to reduce future disagreements and support corporate governance and investor diligence.

Why a Formal Co-founder Agreement Matters

A clear, signed agreement reduces ambiguity about ownership, protects IP, sets expectations for contributions and vesting, and documents dispute and exit processes — all of which help preserve value and reduce litigation risk.

Why a Formal Co-founder Agreement Matters

Who Typically Prepares and Signs This Agreement

Use the agreement at formation, prior to fundraising, or when ownership or responsibilities materially change to ensure enforceability and recordkeeping.

  • Early-stage founders and co-founders establishing equity, roles, and vesting schedules.
  • Startup attorneys and in-house counsel reviewing legal and tax implications.
  • Seed investors and accelerators requiring clear founder governance documents.

Typical Signers and Their Roles

Lead Founder

A primary signer who usually holds operational control or majority responsibility. The Lead Founder should confirm equity calculations, capital contributions, and initial vesting start dates, and must ensure all personal and company contact information is accurate for tax and legal records.

Co-founder

A co-signing founder who accepts assigned equity, role responsibilities, and vesting terms. Co-founders must verify IP assignment clauses, disclosure of competing interests, and consent to the chosen governing law and dispute resolution mechanism.

Essential Data and Compliance Items to Include

Full Legal Names: Provide legal names exactly
Addresses: Street, city, state, ZIP
Social Security / TIN: Used for tax reporting
IP Assignment: Clear ownership transfer
Governing Law: State selection for disputes
Signature Details: Date, printed name, title

Key Risks If the Agreement Is Incomplete or Incorrect

Equity Disputes: Ownership challenges
IP Ownership: Claims over inventions
Tax Consequences: Incorrect reporting triggers
Investor Concerns: Due diligence failures
Enforcement Issues: Unclear remedies
Operational Paralysis: Decision deadlocks

Common Preparation Mistakes to Avoid

  • Using vague language for equity or vesting terms that leaves valuation or cliff periods undefined and invites disagreement.
  • Failing to include an IP assignment clause that assigns founder-created intellectual property to the company, risking later ownership disputes.
  • Neglecting to set a clear dispute resolution method (mediation, arbitration, governing law) so parties lack an agreed process for conflicts.
  • Omitting capital contribution schedules and dilution mechanics, which can produce uncertainty during fundraising or subsequent equity allocations.

Realistic Scenarios Showing How Agreements Help

Two short examples show practical outcomes when agreements capture key terms in writing.

Product Startup Example

Two engineers split equity early to form a product startup; one founder delayed full-time commitment.

  • The agreement created a four-year vesting schedule with a one-year cliff.
  • When the delayed founder left after 10 months, the vesting clause and buyback terms avoided litigation and preserved investor confidence.

Services Firm Example

Three co-founders combined complementary skills in a services firm with unequal capital contributions.

  • The agreement required tailored capital contribution and profit-sharing schedules.
  • Documented buy-sell and valuation methods allowed an orderly transfer when one partner exited for personal reasons.

Step-by-Step: How to Complete a Co-founder Partnership Agreement

Complete the agreement in a logical order to reduce errors and ensure signatures reflect final terms.

  • 01
    Draft Terms: List equity, roles, vesting, capital commitments.
  • 02
    Review Legal: Have counsel check tax and IP provisions.
  • 03
    Finalize Dates: Confirm effective date and vesting commencement.
  • 04
    Sign and Store: Execute signatures and retain originals securely.

After Signing: Routing, Storage, and Notification Steps

Follow a simple post-execution workflow so all parties and stakeholders receive copies and records are preserved.

  • Distribute Copies: Send executed copies to all signers and counsel.
  • Update Cap Table: Record equity changes in the company ledger.
  • Notify Investors: Share material changes with current investors.
  • Store Originals: Keep signed originals in secure storage.

Four Core Clauses Every Agreement Should Include

These clauses form the backbone of enforceability and practical governance for co-founders.

Equity Allocation

Specify percentage ownership, class of shares, and how equity changes on future financing rounds; include anti-dilution or conversion mechanics where applicable to prevent ambiguity.

Vesting and Cliff

Define vesting period, cliff length, acceleration triggers, and treatment on termination so founders and investors understand when equity is earned.

IP Assignment

Include a clear assignment of inventions, code, and works-for-hire to the company, plus obligations to disclose pre-existing IP and license grants if needed.

Decision Rights

Document voting thresholds, reserved matters, and tie-break procedures to reduce future deadlocks and clarify operational authority.

Practical Tips for Accurate and Efficient Completion

Apply these practices to limit mistakes, speed execution, and improve enforceability.

Use Clear, Specific Language
Avoid subjective terms. Replace vague phrases like 'reasonable effort' with measurable obligations, dates, or milestones to reduce interpretive disputes.
Have Counsel Review Key Clauses
Ask a licensed attorney to review tax, securities, and IP provisions to confirm compliance with federal and state law.
Initial Each Page
Require founders to initial each page to confirm they reviewed the entire document and to prevent replacement of pages after signing.
Record Execution Metadata
Capture signature dates, signer emails, and IP addresses in the execution record to support later enforcement if required.

Key Milestones from Negotiation to Recordkeeping

Track these numbered stages as the agreement moves from negotiation through long-term retention.

01

Negotiation Complete

Finalize terms and circulate the near-final draft to founders and counsel.

02

Execution

All founders sign and date the agreement; confirm any witness or notary requirements.

03

Cap Table Update

Record equity changes and issue appropriate stock certificates or unit allocations.

04

Retention Setup

Place executed agreement into secure records retention system.

Typical Time Expectations and Critical Dates

Set realistic internal deadlines to keep the process on track and document timing for legal effect.

Effective Date:

Enter as MM/DD/YYYY — governs when obligations and vesting commence.

Signing Deadline:

Agree on a target date for all signatures, typically within 7–14 days of final draft.

Vesting Commencement:

Specify the date vesting starts; often coincides with full-time start date or funding close.

Capital Contribution Deadline:

State when initial funds or assets are due to the company, with remedies for missed payments.

Record Retention Start:

Begin retention counting from the effective date or signing date as chosen in the agreement.

Six Additional Clauses to Consider Including

Beyond core clauses, include these topics to address governance, finance, and exit mechanics comprehensively.

Buy-Sell / Exit

Provide mechanisms for partner exits, valuations, right of first refusal, drag-along and tag-along rights to ensure orderly transfers.

Confidentiality

Define company confidential information, permitted disclosures, and duration of confidentiality obligations after departure.

Non-Compete / Non-Solicit

Where enforceable, include narrow, jurisdiction-appropriate restrictions on competing activities and solicitation of employees or clients.

Tax Treatment

Clarify tax classification of the entity, allocation of profits and losses, and who reports which items for IRS compliance.

Capital Calls

Set procedures for future funding requests, default remedies, and dilution consequences for missed capital calls.

Dispute Resolution

Choose mediation or arbitration processes, seat of arbitration, and governing law to limit time and costs of disputes.

How to Amend or Revise a Co-founder Agreement

Follow a documented amendment process to ensure changes are valid and enforceable.

01

Propose Amendment:

Draft amendment language and circulate to all parties for review.
02

Obtain Consent:

Secure written consent from required signatories per amendment clause.
03

Formalize Document:

Prepare a signed amendment or restated agreement with clear effective date.
04

Update Records:

Record changes in cap table and corporate minutes.
05

Deliver Copies:

Distribute executed amendment to founders, counsel, and investors.
06

Retain Originals:

Store the executed amendment with the original agreement.

Digital Signing and Platform Considerations

Choose a platform that supports secure storage, reproducible audit trails, and any required compliance such as HIPAA BAA or 21 CFR Part 11 if applicable.

  • Authentication: Use email, SMS code, or stronger methods
  • Audit Trail: Capture IP, timestamp, and signer actions
  • Integrations: Support Salesforce, NetSuite, Google Workspace

Configuring an Online Signing Workflow for This Agreement

Set up fields and authentication to mirror the paper process while preserving legal evidence of execution.

Field Configuration
Signature Field Required; date auto-populates
Initials Field Place at bottom of each page
Conditional Clause Show only if equity > 0%
Authentication Email link + SMS code optional

How a Written Agreement Compares to an Oral or Informal Arrangement

Compare enforceability, clarity, and investor acceptance between formal written agreements and informal approaches.

Criteria Written Agreement Oral/Handshake
Enforceability stronger evidence harder to prove
Clarity on Equity specific allocations ambiguous understanding
Investor Confidence high low
Dispute Resolution predefined process uncertain outcome

Typical eSignature Pricing Options to Consider for Execution

Compare basic cost and core capabilities across common providers; signNow appears first per vendor ordering rules.

signNow DocuSign Adobe Sign PandaDoc HelloSign
Starting Price $8/user/mo $15/user/mo $14/user/mo $19/user/mo $15/user/mo
Free Trial 7-day free trial Varies Varies Varies Varies
Bulk Send Yes (Business Premium+) Varies Varies Varies Varies
Audit Trail Yes Yes Yes Yes Yes
HIPAA Compliant Yes Yes Yes Varies Varies

Frequently Asked Questions and Troubleshooting

Answers to common questions about enforceability, signatures, and post-signing steps for co-founder agreements.


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