How to Allocate Equity in a Startup: Founders, Employees, and Investors

Equity disputes are one of the most common reasons founding teams fall apart. Getting the allocation right — across founders, employees, and investors — requires a plan you build early, document formally, and revisit as the business grows. This guide walks through how to do that at each stage.

There's no universal formula for splitting founder equity — allocations are worked out case by case based on each founder's expected contribution going forward, not just what they've done so far. The most important thing is to agree on the split before or at incorporation and put it in writing.

Most founding teams weigh a combination of factors: expected time commitment (full-time founders generally receive more than part-time ones), functional role and seniority (a CEO-founder often carries a larger stake than other C-level co-founders), capital contributed, and who is taking on the most risk. Agreeing on objective criteria before the conversation gets emotional is what keeps the split from feeling arbitrary later.

Equal splits are common at the earliest stage, but they're not always the right answer. If one founder is working full-time and another is advising part-time, an equal split can create resentment fast. The split that feels fair on day one should still feel fair two years in.

Vesting means equity is earned over time rather than granted all at once. It protects the business if a founder or employee leaves early — and it protects the remaining team from carrying someone who walked away with a full stake. The standard startup structure is a 4-year vesting schedule with a 1-year cliff.

Under that structure, 25% of the grant vests at the one-year mark. The remaining 75% vests gradually — usually monthly or quarterly — over the next 3 years. If someone leaves before the cliff, they receive no vested equity from that grant.

Founder vesting is worth applying even when it feels unnecessary. Investors expect it, and it signals that the founding team is committed for the long haul. A founder who leaves in year one shouldn't walk away with the same stake as one who stayed through Series A.

Employee equity is typically granted through a stock option pool — a block of shares reserved for current and future employees. Before issuing any options, the board needs to formally adopt a written stock option plan that specifies the total pool size and the terms of grants. Skipping this step means any options you hand out aren't legally valid.

At the seed stage, option pools typically represent about 10% of the company's fully diluted shares. That figure often grows to around 15% at Series A and can reach 20–25% in later rounds as more employees join and investors require larger pools as a condition of funding.

Individual grants are sized by role, seniority, and stage. Early employees take more risk, so they typically receive larger grants — often 0.5% to 2% of fully diluted shares. Later hires, when the business can offer competitive salaries, usually receive smaller grants or none at all.

Every time you bring in investors, existing shareholders get diluted — their percentage of the business shrinks even if the number of shares they hold stays the same. Planning for this from the start means building a capitalization table (cap table) that tracks founder shares, the employee option pool, and space for future investor rounds.

A common early-stage target is to reserve 10–20% of total equity for investors, though the right number depends on how much capital you need and what you're willing to give up for it. Overpromising equity to early investors can leave you with very little to offer in later rounds when the stakes are higher.

Advisors are a separate category worth planning for. Advisory equity is typically 0.1% to 2% of fully diluted shares, granted as stock options or restricted stock with a roughly 2-year vesting schedule. Some startups create a small dedicated advisor pool so these grants don't eat into the employee option pool unexpectedly.

The type of equity you grant matters as much as the amount. Each type carries different rights, tax treatment, and timing rules. Choosing the wrong structure for a given recipient can create tax problems or disputes down the road.

• Common stock: carries voting rights; typically issued to founders at formation

• Preferred stock: often issued to investors; may include liquidation preferences and other protections but usually no voting rights

• Stock options: give the holder the right to buy shares at a fixed price (the exercise price) after vesting; the most common structure for employee grants

• Restricted stock units (RSUs): convert to common or preferred stock once vested; more common at later-stage companies with established valuations

• Restricted stock awards: shares issued at grant but subject to forfeiture if the recipient leaves before vesting; founders often receive equity this way

If you're issuing restricted stock to founders or early employees, the recipient should consider filing an IRS Form 83(b) election within 30 days of the grant. This election sets the tax basis at the grant date value rather than the (likely higher) value at each vesting date. Missing the 30-day window means you can't file it — and the tax hit on vesting can be significant. Talk to a tax professional before issuing restricted stock.

Every equity grant needs formal documentation. Verbal agreements and handshake deals don't hold up when a co-founder leaves or an investor asks to see your cap table. The paperwork isn't optional — it's what makes the grant legally valid.

Capitalization table

A cap table tracks every share issued, every option granted, and every investor's stake on a fully diluted basis. Build one at formation and update it every time equity changes hands. Investors will ask for it, and an outdated or inaccurate cap table can delay or kill a funding round.

Stock purchase agreements

Founder shares are typically issued under a stock purchase agreement that specifies the number of shares, the price per share, and the vesting terms. Board approval — documented through a board consent or resolution — is required before any shares can be issued.

Option grant agreements

Each employee option grant needs a written grant agreement that names the number of options, the exercise price, the vesting schedule, and the expiration date. These agreements are issued under the board-approved stock option plan. Grants made outside the plan aren't enforceable.

Advisory agreements

Advisor equity grants should be documented in a written advisory agreement that specifies the scope of the advisor's role, the equity amount, and the vesting terms. Board approval is required here too. Without a signed agreement, an advisor's claim to equity is hard to enforce — and hard to dispute if the relationship goes sideways.

Equity law intersects with securities law, tax law, and state corporate law. A legal professional who works with startups can help you structure grants correctly from the start. Getting it wrong early — wrong equity type, missing board approval, no 83(b) election — can mean expensive fixes later. Bizee and its affiliates don't provide legal or tax advice; this guide is informational only.