Startup Law Basics: Legal Foundations Every Founder Needs

Legal Mistakes Kill More Startups Than Bad Products

Andreessen Horowitz's legal team has publicly noted that a disproportionate number of failed deals trace back to preventable legal errors — split equity without vesting, missing IP assignment agreements, founders who used open-source code under incompatible licenses, or pre-formation work that wasn't properly assigned. Investors walk away from companies with legal problems. Courts don't fix them quickly. Getting the legal foundation right from the start costs far less than fixing it later.

Entity Selection: Delaware C-Corp vs. LLC

Startups seeking venture capital investment almost universally form Delaware C-corporations. Here's why:

• VC compatibility: Venture funds typically cannot invest in LLCs or S-corporations due to their own fund structure restrictions. A Delaware C-corp is the expected vehicle.
• QSBS eligibility: Qualified Small Business Stock (Section 1202) allows founders and early investors in C-corps to exclude up to $10 million in capital gains from federal taxes if shares are held for 5+ years. LLCs don't qualify.
• Option issuance: Stock option plans are straightforward in C-corps. Equity compensation in LLCs is legally and tax-wise complex (profits interests, etc.).
• Delaware law: Delaware courts are sophisticated in corporate law, predictable, and respected by investors nationally and internationally.

Bootstrapped businesses or those not seeking institutional investment often prefer LLCs — lower ongoing costs, pass-through taxation, and simpler governance.

Founder Agreements and Equity Splitting

Agreeing on equity splits before forming the company — based on gut feeling and enthusiasm — is a common mistake. Equity should reflect:

• Relative contributions of capital, time, expertise, and opportunity cost
• Roles going forward (who is doing more of the work long-term?)
• Who originated the core idea, IP, or customer relationships

The most common approach: roughly equal splits among 2-4 committed founders with vesting schedules ensuring earned ownership over time.

Vesting Schedules: The Most Important Startup Legal Concept

Vesting protects the company from a co-founder who leaves early but retains a large equity stake, preventing that co-founder's share from being repurchased and slowing company growth or investor attraction. Standard startup vesting:

• 4-year vesting with 1-year cliff: No shares vest until the 12-month anniversary (cliff), then 25% vests. The remaining 75% vests monthly over the next 36 months.
• Early exercise + 83(b) election: Founders should exercise options (or purchase founders' shares) as early as possible — when the stock price is at or near zero — and file an 83(b) election with the IRS within 30 days. This starts the QSBS and capital gains holding clock immediately, potentially saving millions in future taxes.

Intellectual Property Assignment

Every founder and employee must sign an IP assignment agreement (often part of a Proprietary Information and Inventions Assignment, or PIIA) before starting work. This document assigns all work-related IP created by the individual to the company. Without it:

• A founder who leaves may claim ownership of the technology they built
• Investors cannot be certain the company owns what it purports to own
• Acquirers will require retroactive signatures — which departed employees may refuse to provide

Funding Instruments

Employment Law Basics for Startups

Misclassifying employees as independent contractors is one of the most frequent legal violations by early-stage companies. Contractors cannot be controlled like employees — if you set their hours, require specific methods, and provide tools, they may legally be employees. Misclassification creates back taxes, penalties, and potential lawsuits.

• Offer letters: Should specify role, compensation, at-will employment status, and reference to the PIIA and option grant
• Option grants: Must be approved by the board of directors and documented formally with a grant notice and option agreement
• Exempt vs. non-exempt: Salaried employees in certain roles are exempt from overtime rules; hourly workers generally are not

Regulatory Compliance by Industry

Disclaimer: Startup legal needs vary widely based on business model, jurisdiction, and investor expectations. This article is educational only. Consult a qualified startup attorney before making entity, equity, or compliance decisions.