Startup Contract Toolkit: Founders Guide

Most startups fail for business reasons — bad product-market fit, running out of cash, team dysfunction. But a surprising number of avoidable disasters stem from missing or poorly drafted contracts.

A co-founder who leaves with unvested equity. A contractor who claims ownership of your core codebase. An advisor who shares your pitch deck with a competitor. A SAFE with terms that dilute founders to single digits.

Every one of these scenarios is preventable with the right contracts. This guide walks through the essential agreements every startup needs — organized by stage — with practical advice on what to include and what to watch for.

Pre-Launch: Protecting the Foundation

Before you write a line of code or pitch a single investor, these contracts establish the legal foundation of your company.

1. Co-Founder Agreement

The co-founder agreement is arguably the most important contract your startup will ever sign. It defines the relationship between founders and addresses the questions that destroy companies when left unanswered.

Must-include clauses:

• Equity allocation — Who owns what percentage and the rationale behind the split
• Vesting schedule — Standard is 4-year vesting with a 1-year cliff. This means if a co-founder leaves in month 8, they walk away with nothing. If they leave in month 14, they've earned 25% of their allocation. The cliff protects against early departures.
• IP assignment — All intellectual property created for the company belongs to the company, not the individual founder. This is non-negotiable for fundraising.
• Roles and responsibilities — Who handles product, sales, operations, fundraising. Avoid co-CEO structures — they create decision paralysis.
• Decision-making authority — What requires unanimous consent (equity issuance, major pivots, fundraising) vs. individual authority (hiring under a threshold, operational spending)
• Departure provisions — What happens if a founder leaves voluntarily, is terminated, becomes disabled, or dies. Include buyback rights, accelerated vesting triggers, and non-compete terms.
• Dispute resolution — Mediation before arbitration. Litigation between co-founders is company-ending.

Common mistakes: Equal equity splits without vesting. If two founders split 50/50 with immediate vesting and one leaves after three months, they walk away with half the company for minimal contribution. Vesting solves this.

2. Intellectual Property Assignment Agreement

This contract ensures the company — not individual founders or contractors — owns all intellectual property.

Must-include clauses:

• Scope of assignment — All work product, inventions, code, designs, and discoveries related to the company's business
• Prior inventions exclusion — List anything the founder invented before the company that they're not assigning
• Work-for-hire declaration — Establishes that work created within the scope of the company relationship is owned by the company
• Moral rights waiver — Where applicable, waiver of the creator's moral rights to the work
• Representations — Confirmation that the work doesn't infringe third-party IP

Why it matters: Investors will ask for IP assignment documentation during due diligence. If your CTO wrote the core product before the company was incorporated and never assigned it, you have a fundamental ownership problem that can kill a fundraise.

3. Non-Disclosure Agreement (NDA)

You'll need NDAs for investor conversations, partnership discussions, and any situation where you share proprietary information.

Must-include clauses:

• Definition of confidential information — Be specific. "Everything we discuss" is too broad to enforce. Define categories: business plans, financial projections, technical architecture, customer data, pricing strategies.
• Obligations of the receiving party — How they must protect the information (reasonable care standard), who they can share it with (need-to-know basis), what they can't do with it (competitive use prohibition)
• Duration — Typically 2–3 years for business information, indefinite for trade secrets
• Exclusions — Information that becomes public, was independently developed, or was received from a third party
• Return/destruction — Obligation to return or destroy confidential materials on request

A practical note: Many experienced investors won't sign NDAs before seeing a pitch deck — it creates legal overhead for a meeting they may take 50 times per month. Use NDAs for deep technical discussions, due diligence phases, and partnership negotiations. For initial pitch meetings, share only what you're comfortable being public.

Create an NDA →

Building the Team: Contractor and Employment Agreements

4. Independent Contractor Agreement

Most startups rely on contractors before they can afford full-time employees. This contract defines the working relationship, deliverables, and — critically — IP ownership.

Must-include clauses:

• Scope of work — Specific deliverables, milestones, and acceptance criteria. "Build the app" is not a scope of work. "Develop a React Native mobile application with user authentication, product catalog, and checkout flow per the attached specification" is.
• Compensation — Fixed price per milestone or hourly rate with a cap. Payment terms (net 15 or net 30). Late payment penalties.
• IP assignment — All work product becomes company property upon payment. This is the most important clause. Without it, the contractor may own the code they wrote for you.
• Confidentiality — NDA terms covering all company information the contractor accesses
• Non-solicitation — Prevents the contractor from hiring your employees or poaching your clients for a defined period
• Termination — How either party can end the relationship, payment for work completed, transition obligations
• Independent contractor status — Clarifies the relationship is not employment. Include specific language about the contractor's control over methods, tools, and schedule.

Common mistakes: Treating contractors like employees while using a contractor agreement. If you control when, where, and how someone works, they're an employee regardless of what the contract says. Misclassification carries serious penalties — back taxes, unpaid benefits, and per-violation fines.

Create a contractor agreement →

5. Employment Agreement

When you make your first full-time hires, employment contracts protect both the company and the employee.

Must-include clauses:

• Position and duties — Title, reporting structure, primary responsibilities
• Compensation — Base salary, equity grant (with reference to the stock option plan), bonus structure, benefits
• IP assignment — All work product created within the scope of employment belongs to the company. Note: California, Illinois, Minnesota, and several other states limit employer claims on inventions created entirely on the employee's own time without company resources.
• Confidentiality — Ongoing obligation that survives termination
• Non-compete and non-solicit — Enforceability varies dramatically by state. California bans most non-competes. Other states enforce them within reasonable scope and duration.
• At-will employment — In most US states, either party can terminate for any lawful reason with appropriate notice
• Dispute resolution — Arbitration clause with carve-outs for IP disputes and injunctive relief

Fundraising: Investment Agreements

6. SAFE (Simple Agreement for Future Equity)

The SAFE has become the standard instrument for pre-seed and seed fundraising. Developed by Y Combinator, it's simpler and cheaper than convertible notes.

Key terms to understand:

• Valuation cap — The maximum valuation at which the SAFE converts to equity. If your cap is $10M and you raise your Series A at $50M, the SAFE investor gets shares priced at the $10M valuation — a significant discount.
• Discount rate — An alternative or complement to the cap. A 20% discount means the SAFE investor buys shares at 80% of the Series A price.
• Most Favored Nation (MFN) — Gives the investor the right to adopt the terms of any subsequent SAFE issued on better terms
• Pro rata rights — The right to invest in future rounds to maintain their ownership percentage

SAFE variations:

• Post-money SAFE (YC standard) — The valuation cap includes the SAFE itself and the option pool. This gives investors a clear ownership percentage.
• Pre-money SAFE — The valuation cap excludes the SAFE and option pool. Harder to calculate final ownership but can be founder-favorable in certain scenarios.

Common mistakes: Stacking too many SAFEs without tracking dilution. Each SAFE represents future dilution, and the math compounds. Model your cap table with all outstanding SAFEs before issuing new ones. Founders have been surprised to find themselves owning less than 30% of their company at Series A because of poorly tracked SAFE dilution.

7. Convertible Note

An alternative to SAFEs, convertible notes are debt instruments that convert to equity at a future round. They include terms SAFEs don't have.

Key differences from SAFEs:

• Interest rate — Typically 2–8% annual. Accrued interest converts to additional equity.
• Maturity date — The date by which the note must convert or be repaid. Typically 18–24 months.
• Repayment obligation — If no qualifying round occurs by maturity, the company technically owes the investor their money back (though this is usually renegotiated)

When to use convertible notes vs. SAFEs: SAFEs are simpler and founder-friendlier for very early fundraising. Convertible notes may be preferred by investors who want the security of a debt instrument, or in jurisdictions where SAFEs have unclear legal status.

Growth Stage: Advisor and Partnership Agreements

8. Advisor Agreement

Advisors provide introductions, strategic guidance, and credibility. A formal agreement protects both parties and sets clear expectations.

Must-include clauses:

• Advisory role definition — Hours per month (typically 2–5), types of support (intros, board attendance, technical review)
• Equity compensation — Standard ranges: 0.25% for light advisory, 0.5% for regular involvement, 1% for significant contribution. Standard vesting: monthly over 1–2 years with no cliff.
• Confidentiality — Advisors often sit on multiple boards and advise competitors. Strong confidentiality terms are essential.
• Non-solicitation — Prevents the advisor from recruiting your employees
• Term and termination — How long the advisory relationship lasts and how either party can end it

Common mistakes: Giving equity without a vesting schedule. An advisor who gets 1% upfront and provides no value after month one has captured permanent dilution for zero contribution.

9. Terms of Service and Privacy Policy

When you launch your product, these customer-facing agreements define the legal relationship with your users.

Must-include in Terms of Service:

• Acceptable use policy
• Intellectual property ownership (you own the platform, users own their data/content)
• Limitation of liability
• Dispute resolution and governing law
• Termination and account deletion

Must-include in Privacy Policy:

• What data you collect and why
• How data is stored, processed, and shared
• User rights (access, correction, deletion)
• Cookie and tracking disclosures
• Compliance with applicable regulations (GDPR, CCPA, etc.)

The Startup Contract Timeline

Here's when you'll typically need each contract:

Pre-incorporation:

• Co-founder agreement
• IP assignment (founders)

Incorporation through first hire:

• NDA (investor conversations)
• Independent contractor agreements
• IP assignment (all contributors)

First fundraise:

• SAFE or convertible note
• Updated cap table

First employees:

• Employment agreements
• Stock option plan
• Offer letters referencing the option plan

Product launch:

• Terms of service
• Privacy policy
• Customer/vendor agreements

Growth:

• Advisor agreements
• Partnership agreements
• Enterprise customer contracts

Common Mistakes That Kill Startups

1. No co-founder agreement — The number one legal mistake founders make. "We'll figure it out later" becomes "we'll litigate it later."

2. Missing IP assignments — If the person who wrote your code never assigned the IP to the company, you don't own your product. Fix this before fundraising.

3. Contractor misclassification — Calling someone a contractor doesn't make them one. The IRS and state labor boards look at the actual working relationship.

4. Verbal equity promises — "I'll give you 2% when we incorporate" is unenforceable and creates resentment. Put equity grants in writing with vesting terms.

5. Ignoring jurisdiction — Your contracts must comply with the laws where your company is incorporated, where your employees work, and where your customers are located. A Delaware C-Corp with California employees needs California-compliant employment agreements.

Build Your Contract Stack

Every startup needs contracts, and waiting until a dispute forces the issue is the most expensive way to get them.

Start with the contracts that match your current stage. As your company grows, your contract needs will evolve — but the foundation you build now protects everything you build later.

Create an NDA → | Create a contractor agreement → | Create a service agreement →

Whether you're drafting your first co-founder NDA, hiring your first freelance developer, or formalizing an advisory relationship, start with jurisdiction-aware templates that reflect current law — not a generic document from 2019.