Equity is how founders get rich. It's also how they get burned.
Most early-stage founders learn equity the hard way — they split things naively, bring on an investor without understanding dilution, or lose a co-founder who walks away with 30% of the company because nobody set up vesting.
This guide covers what you actually need to know about startup equity: splits, vesting, cap tables, dilution, and when to call a lawyer.
⚠️ This post is for educational purposes only and is not legal or financial advice. Work with a qualified startup attorney before making equity decisions.
Equity is ownership. When you start a company, you own 100% of it. Every time you give someone a piece — a co-founder, an investor, an early employee — your ownership percentage goes down.
That's dilution. It's not always bad. If you give up 20% to raise $500K and the company is worth $10M two years later, you're better off than if you owned 100% of nothing.
The goal isn't to maximize your ownership percentage. The goal is to maximize the value of your slice of the pie, even as the pie itself grows larger.
This is where most early teams go wrong.
The 50/50 problem: Equal splits feel fair. They're often not. If one co-founder is working full-time and the other isn't, or one is bringing more technical skill and the other more hustle, 50/50 creates resentment fast.
How to think about it:
There's no formula, but 60/40 or 70/30 is often more honest than 50/50 when one founder is clearly leading.
The most important thing: Have a real conversation before you launch. Equity disputes between co-founders are one of the top company killers. Get it in writing, and set up vesting from day one.
⚠️ Vesting agreements and equity grants are legal documents. Work with a qualified startup attorney to set these up correctly.
Vesting means you earn your equity over time. Without it, a co-founder can join, contribute for six months, and walk away with their entire stake.
Standard vesting: 4-year vesting with a 1-year cliff is the industry standard.
Example: You give your CTO 20% of the company with 4-year vesting, 1-year cliff.
This protects the company. If someone leaves early, the unvested shares go back into the pool.
One more term to know: Acceleration. Some agreements include single-trigger or double-trigger acceleration — meaning if the company is acquired, some or all unvested equity vests immediately. This is worth discussing with your lawyer before you sign anything.
Your cap table (capitalization table) is a spreadsheet that shows who owns what. At its simplest:
| Stakeholder | Shares | Ownership % |
|---|---|---|
| Founder 1 | 5,000,000 | 50% |
| Founder 2 | 4,000,000 | 40% |
| Option Pool | 1,000,000 | 10% |
| Total | 10,000,000 | 100% |
As you raise money and give out equity, the cap table grows more complex. Investors will want to see it. Keep it clean and accurate.
Tools: Most early startups track their cap table in Google Sheets. Once you raise a priced round, you'll want cap table software (Carta, Pulley, Capshare). Don't try to manage a complex cap table in your head.
Before you raise a priced round, investors will typically ask you to set aside an option pool — usually 10–20% of the company — for future employees.
The key thing to understand: the option pool is usually created before the investment closes, which means it dilutes the founders, not the investors. This is called the "pre-money option pool shuffle," and it's standard — but it means you should negotiate the size of the pool carefully.
If investors ask for a 20% pool and you only expect to hire 3 people in the next 12 months, push back. Model out what you actually need and present that case.
Every time you issue new shares — to an investor, an employee, a consultant — everyone else's percentage goes down. That's dilution.
Simple example:
You now own less of the company — but the company is worth more. If your Series A investor's money helps you grow from $1M to $10M in value, you're richer even though your percentage dropped.
The danger zone: Taking bad dilution. If you raise at a low valuation, or issue too many options too casually, or bring on advisors with 2% stakes for doing almost nothing — you'll find yourself at Series A with founders who own 25% of a company that still isn't worth much. That's a bad outcome.
Rule of thumb: every dilutive event should increase the company's value by more than it reduces your percentage.
Early employees are often willing to take below-market salaries in exchange for equity. That's the deal. But you need to do it right.
ISOs vs. NSOs: Most startup employees receive Incentive Stock Options (ISOs), which have better tax treatment. Non-Qualified Stock Options (NSOs) are sometimes used for advisors and contractors. Your lawyer and accountant will help you choose.
Strike price: Options are granted at a strike price — the price at which the employee can buy the shares. This is typically set by a 409A valuation (a formal appraisal of the company's fair market value). You need one before granting options. Don't skip this.
The standard range:
These are rough ranges. They compress significantly at later stages when the company is more valuable.
Equity questions are legal questions. You need a startup attorney when:
Services like Clerky ($500–$1,500) can handle incorporation and basic equity setup for early-stage companies. Once you're raising meaningful money, you'll want a real startup law firm (Gunderson, Wilson Sonsini, Cooley, or a regional equivalent).
Don't try to DIY a cap table or co-founder agreement without legal review. The stakes are too high.
If you can't answer these questions right now, that's a problem:
You don't need to be an equity expert. But you do need to know the basics — because someone else at the table definitely will.
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