To split equity among cofounders effectively, you should calculate ownership based on each person's relative contributions, including initial capital, proprietary intellectual property, ongoing time commitments, and future execution risks. Founders must approach equity allocation with a clear understanding of the factors at play and how different choices will affect future outcomes.

With stakes this high, the topic of equity division demands rigorous scrutiny and a solid strategy. A carefully designed equity split is a strong foundation for the startup, providing stability through various stages, including early financing rounds and potential exits. Here’s what cofounders should consider in the pursuit of an equity structure that fits their needs and preferences, both now and in the future.

What’s in this article?

• What is equity in a startup?
  
• Types of equity in startups
  
• Different ways to split equity among cofounders
  
• What to consider when splitting equity among cofounders
  
• Why does equity matter in a startup?
  
• How startup stage and timing affect cofounder equity
  
• How Stripe Atlas can help
  

What is equity in a startup?

Equity represents ownership in a startup, which is often granted through stock options or shares. For cofounders and team members who join the venture early, this ownership stake serves as both a financial incentive and a form of compensation for the risks and efforts associated with launching a new business. Equity stakes entitle their holders to a proportion of the company’s future profits and give them voting rights in company decisions, usually in correlation with the size of their ownership.

Types of equity in startups

Different forms of equity address different needs and constraints. Types of equity include:

• Common stock: This is the most straightforward form of equity, which is generally reserved for founders and employees. It grants the holder voting rights and entitles them to a share of any dividends or exit proceeds.

• Preferred stock: Preferred shares are often issued to investors and come with additional rights, such as priority in receiving dividends and assets in case of a liquidation event. This type of stock can also include antidilution protections.

• Stock options: Options grant the right to purchase shares at a predetermined price (the strike price) within a specific time frame. These are usually allocated to employees and may come with various conditions.

• Restricted stock units (RSUs): These are commitments to grant a set number of shares at a future date, contingent on certain conditions such as time-based vesting or achievement of performance metrics.

• Warrants: Similar to options, warrants confer the right to purchase shares but are generally issued to investors rather than employees.

• Convertible notes and SAFEs: These financial instruments convert into equity during a future funding round, typically at more favorable terms for the holder. A simple agreement for future equity (SAFE) grants the investor the right to receive shares at a later date, while convertible notes are company loans in which the debt converts to shares instead of being repaid.

Different ways to split equity among cofounders

Just as there’s no fixed way to decide how much equity a cofounder is entitled to, there’s no single structure or model by which equity can be arranged and distributed among founders. Here are some of the most common ways cofounders organize and manage their equity breakdown:

• Equal splits: Although it might seem like the fairest method, splitting equity evenly among all founders brings its own set of challenges. It assumes each founder will contribute equally to the company’s growth, which might not hold true over time. Moreover, this method can create governance issues, especially when the number of cofounders is even, leading to deadlocks in decision-making.

• Weighted contributions: This method attempts to quantify each founder’s input, such as time commitment, financial investment, and skill set. It then splits equity proportionally based on these weighted contributions. This method allows for a more nuanced allocation, but it requires a comprehensive assessment and agreement on the value of different contributions.

• Dynamic or adjustable equity: With this method, the founders agree on a set of metrics or key performance indicators that will influence the equity distribution over time. These metrics can include revenue milestones, customer acquisition rates, or product development goals. The equity split adjusts automatically based on these predetermined metrics. This model provides the flexibility to account for changes in contribution levels, market conditions, or strategic direction.

• Performance-based vesting: Under this structure, equity vests when specific objectives are accomplished. Unlike a traditional time-based vesting schedule, performance-based vesting ties equity to measurable outcomes. For example, a founder responsible for technology might decide on a setup in which equity vests when they reach certain product development milestones.

• Role-based splits: Here, equity is divided according to the roles each founder assumes. This structure often categorizes roles into different tiers, each with its own equity range. For instance, a CEO might receive a larger equity stake compared to a CTO or COO based on the perceived value of that role in achieving the company’s goals.

• Hybrid models: In some cases, a combination of methods can be effective. For example, an initial equity split can be determined through weighted contributions, but with a clause that enables dynamic adjustments based on specific performance metrics.

• Points-based system: Some startups opt for a points-based system, in which each founder earns points for their contributions, responsibilities, and risks. These points are then used to calculate each founder’s percentage of equity. This system adds valuable granularity, but it can be labor-intensive to maintain.

• Prenegotiated buy/sell agreements: Another option is to have prenegotiated buy/sell agreements that specify conditions under which a founder can increase their equity stake by purchasing shares from the company or other founders. This provides a mechanism to adjust equity based on ongoing valuations and contributions without diluting ownership unnecessarily.

• Reserving an option pool: While this method doesn’t affect the founder equity split directly, an option pool can provide the flexibility to bring in key hires without overly diluting the founders’ stakes. The size of this pool and the terms under which options are granted are matters of strategic importance.

Each method for allocating equity has its own advantages and disadvantages. The most effective approach fits the specific needs and circumstances of the startup. Document all agreements carefully, taking into account future scenarios such as new funding rounds, exits, or changes in founder involvement. Consider seeking legal and financial advice on best practices for startup founder equity splits and help crafting an equity agreement that serves the long-term interests of all stakeholders.

What to consider when splitting equity among cofounders

Deciding how to allocate equity among cofounders is a complex decision with long-lasting implications. Here are some factors to consider:

• Skill sets and contributions: Different founders bring different strengths and abilities to the table. One founder might have the technical skills to build the product, while another might excel at market strategy and customer acquisition. Consider what each founder has already contributed and what roles they will fill moving forward. Quantify the value of these contributions, both current and future, in relation to the company’s objectives.

• Time commitment: Not all founders work full time. Some may hold another job and work on the startup during off hours and on weekends, while others may be able to commit themselves fully from day one. Consider the time each founder can give to the venture, today and in the foreseeable future and what they might need to forgo. The loss of a high-paying job or another significant opportunity can be factored into the equity equation.

• Financial investment: Some founders may provide essential starting capital for the company, which could justify a different equity stake.

• Business connections and credibility: Access to valuable networks can be a significant asset. A cofounder’s ability to provide introductions to key players in the industry or potential clients can substantially accelerate growth.

• Tolerance for risk: Different founders may have different appetites for risk, which affect their willingness to make key decisions for the business. This factor can influence how much control each cofounder should have and can be reflected in their equity stake. Consider the legal responsibilities each founder will carry. Regulatory compliance, fiduciary responsibilities, and other legal matters may fall more on some than others, which could warrant a different share of equity.

• Vesting schedules: While the idea of a vesting schedule is not tied directly to the initial equity split, it can be helpful to consider this when making big decisions. Understanding that stakes might be subject to change based on certain conditions allows for a more flexible yet controlled approach to equity allocation.

• Exit strategy preferences: Different founders may have divergent views on the business’s endgame and different exit strategy preferences. Whether the ultimate goal is a quick acquisition or long-term growth will affect the value each founder brings and their respective fair equity share.

• Interpersonal dynamics and team health: Emotional intelligence, strong personal relationships, and the ability to maintain a positive work environment are important but often overlooked skills that a founder can bring to a startup. A founder’s contributions to team morale can also be a factor in equity allocation.

There’s no single solution to equity distribution because the “right” equity strategy is one that reflects a startup’s unique needs and circumstances. The bottom line is there’s no way to arrive at the right outcome without thinking carefully about the nuances of your venture and team.

Why does equity matter in a startup?

Within startups, equity is the backbone of incentive structures, driving both short-term actions and long-term strategic planning. Its importance extends far beyond the concept of ownership or potential monetary gains. Equity holds implications that touch every aspect of how the startup operates. Here are some key reasons why equity matters in the startup environment:

• Motivate, retain, and compete for top talent: Equity aligns the interests of team members with the overall health and growth of the startup. This approach motivates individuals to invest maximum effort because their financial rewards are tied directly to the startup’s performance. Often, startups are unable to offer salaries comparable to those at established firms, so equity becomes a compelling alternative form of compensation to attract top-tier talent. For individuals attuned to the risk-reward dynamics of startups, an attractive equity package can offset lower salaries.

• Empower strategic decision-making and operational flexibility: Those who hold equity possess voting rights (depending on the type of shares), influencing strategic decisions including fundraising and exit strategies. These rights enable stakeholders to shape the course of the startup in a profound way. At the same time, different equity instruments come with varying degrees of operational obligations and financial benefits, offering tactical leeway in governance and decision-making. For example, instruments such as convertible notes or SAFEs can defer valuation discussions until a better time, providing the startup with valuable operational flexibility.

• Optimize investor relations, capital allocation, and financial strategy: Equity structures communicate information to potential investors about how the company values different contributions and risks. Well-structured equity arrangements can instill confidence by demonstrating that the startup has a coherent vision and a fair, deliberate approach to rewarding contributions. Ultimately, equity is integral to the company’s financial architecture; the type of equity and associated rights can impact the startup’s ability to raise capital, allocate resources, and service debt.

• Maximize exit opportunities and protect against risk: With liquidity events such as initial public offerings (IPOs) or acquisitions, equity holders stand to gain significantly. The allocation of equity can become an important part of these negotiations, affecting financial gains and also the governance and strategic direction of the company after an exit. For cofounders and early team members, the dilution of equity can be an inevitable part of growing the business. Intelligent equity structuring that takes into account future funding rounds can mitigate excessive dilution, thereby balancing the introduction of new capital with the preservation of original stakeholders’ influence and financial gains.

• Enhance long-term corporate tax planning: Knowledgeable stakeholders use equity as a means of efficient tax planning. From the timing of exercising stock options to structuring the sale of shares, astute planning can reduce tax burdens and enhance financial gains (although this varies by jurisdiction).

The elements of equity can be an important leverage in negotiations, in setting growth strategies, and in deciding exit pathways. For instance, negotiating for more voting rights or antidilution provisions can give a cofounder or employee a stronger position in future fundraising rounds or acquisition talks. Beyond representing only the percentage of ownership, the specific type and terms of equity are tactical levers for power and profit within the startup environment.

How startup stage and timing affect cofounder equity

An equity split is rarely a static agreement. As a startup matures from an idea into a funded enterprise, the value of the company changes, new stakeholders enter the capitalization table, and initial assumptions must adapt to real-world execution.

Managing equity means understanding how timing and growth stages alter ownership dynamics. Here are some best practices for founder equity split.

Equity split models for preseed startups with no funding

When a startup is in the preseed phase with no outside capital, equity is the only currency available to compensate for risk. Rather than relying on a static snapshot of ownership, founders at this stage often benefit from dynamic equity split models.

A dynamic model calculates equity split ratios based on a rolling ledger of contributions. This ensures that if one cofounder leaves early or fails to deliver on their operational promises, the equity automatically corrects to reflect actual inputs before any formal corporate valuation is locked in.

How to value a preseed startup for equity distribution

Valuing a company before it has revenue, historical financials, or a product is inherently subjective. For the purpose of distributing internal equity, founders should avoid trying to establish an arbitrary multimillion-dollar valuation. Instead, focus on relative asset valuation.

Value the foundational elements individually:

• Intellectual property (IP): What would it cost to hire an outside firm to build the current prototype or draft the proprietary algorithm?
  
• Opportunity cost: What market-rate salary are the founders forgoing to work on this venture full time?
  
• Cash runway: What is the exact cash value of the personal savings contributed to cover initial legal incorporation and cloud servers?
  

By aggregating these baseline replacement costs, you establish a realistic valuation framework that dictates a fair baseline for share issuance.

The impact of seed funding on cofounder equity

When a startup successfully closes a seed funding round, the immediate impact on cofounder equity is dilution. Investors do not buy existing shares from the founders. Instead, the company creates and issues new shares to the investors in exchange for capital.

These shares are recorded in a preseed cap table that shows the breakdown of ownership among founders, investors, employees with stock options, and any other shareholders. This helps all parties understand their current stakes and how they might change with future funding rounds or stock option exercises.

While the founders' individual ownership percentages decrease, the mathematical value of their shares increases because they now own a piece of a capitalized, higher-value entity. Seed rounds also formalize the equity structure by introducing institutional vesting mandates, governance rules, and preferred share classes that sit above the founders' common stock.

Revisiting a cofounder equity split after one year

Reviewing the equity distribution after 12 months is an essential governance practice. Over the course of a year, initial expectations often clash with operational realities. To revisit a split objectively without destroying team cohesion:

• Audit milestones against the original plan: Review the initial roadmap. Did each founder hit their projected execution targets?

• Take advantage of the one-year cliff: If structured correctly with standard vesting, a cofounder who underperformed or left before the 12-month mark will not have vested any permanent equity. This milestone provides a clean, legal inflection point to renegotiate unvested allocations.

• Issue direct equalization grants: If a structural imbalance is identified, avoid trying to claw back vested shares. Instead, use the company's unallocated equity pool to issue new, milestone-tied stock options or restricted stock units to the founder carrying the heavier operational burden.

Allocating equity to a founder who joins later

A late-joining cofounder enters the business when significant execution risk has already been retired by the initial team. Consequently, their equity allocation should reflect this lower risk profile.

While an initial cofounder might command 30% to 50% of the company, a cofounder joining after a prototype is built or after initial preseed funding is secured typically receives a smaller pool. This equity should be subject to a fresh four-year vesting schedule with a standard one-year cliff, protecting the early founders from long-term equity loss if the late-stage addition fails to integrate into the startup's culture.

How Stripe Atlas can help

Stripe Atlas sets up your company’s legal foundations so you can fundraise, open a bank account, and accept payments within two business days from anywhere in the world.

Join 75K+ companies incorporated using Atlas, including startups backed by top investors like Y Combinator, a16z, and General Catalyst.

Applying to Atlas

Applying to form a company with Atlas takes less than 10 minutes. You’ll choose your company structure, instantly confirm whether your company name is available, and add up to four cofounders. You’ll also decide how to split equity, reserve a pool of equity for future investors and employees, appoint officers, and then e-sign all your documents. Any cofounders will receive emails inviting them to e-sign their documents, too.

Accepting payments and banking before your EIN arrives

After forming your company, Atlas files for your EIN. Founders with a US Social Security number, address, and cell phone number are eligible for IRS expedited processing, while others will receive standard processing, which can take a little longer. Additionally, Atlas enables pre-EIN payments and banking, so you can start accepting payments and making transactions before your EIN arrives.

Cashless founder stock purchase

Founders can purchase initial shares using their intellectual property (e.g., copyrights or patents) instead of cash, with proof of purchase stored in your Atlas Dashboard. Your IP must be valued at $100 or less to use this feature; if you own IP above that value, consult a lawyer before proceeding.

Automatic 83(b) tax election filing

Founders can file an 83(b) tax election to reduce personal income taxes. Atlas will file it for you—whether you are a US or non-US founder—with USPS Certified Mail and tracking. You’ll receive a signed 83(b) election and proof of filing directly in the Stripe Dashboard.

World-class company legal documents

Atlas provides all the legal documents you need to start running your company. Atlas C corp documents are built in collaboration with Cooley, one of the world’s leading venture capital law firms. These documents are designed to help you fundraise immediately and ensure your company is legally protected, covering aspects like ownership structure, equity distribution, and tax compliance.

A free year of Stripe Payments, plus $50K in partner credits and discounts

Atlas collaborates with top-tier partners to give founders exclusive discounts and credits. These include discounts on essential tools for engineering, tax, finance, compliance, and operations from industry leaders like AWS, Carta, and Perplexity. We also provide you with your required Delaware registered agent for free in your first year. Plus, as an Atlas user, you’ll access additional Stripe benefits, including up to a year of free payment processing for up to $100K in payments volume.

Learn more about how Atlas can help you set up your new business quickly and easily, and get started today.