A founders agreement is the contract among the people starting a company that defines who owns what, what each founder is expected to contribute, what happens if a founder leaves, and how equity is earned over time. For a New York startup, the founders agreement is the most important early document the company signs, more important in the long run than even the certificate of incorporation. The agreement is read carefully by every later investor, every acquirer, and any founder who eventually wants to leave or is asked to leave. A founding team that has not put a real agreement in place is one personnel change away from a deeply expensive dispute. This guide walks through what a founders agreement covers, how equity vesting works, the standard cliff and acceleration structures, the intellectual property and confidentiality provisions that protect the company, and the practical questions every founding team should resolve in writing before they start hiring or raising capital. For broader context on early-stage company formation, our LLC vs corporation guide covers the entity choice that frames any founders agreement, and our SAFE and convertible note financing guide covers the financing instruments that follow founder formation.
Why Founding Teams Need a Written Agreement
Most startup founding teams begin with a handshake. Two or three people decide to start a company together, agree informally that they will be equal partners (or that one will own slightly more), and start building. The handshake works fine during the honeymoon phase. It stops working the moment something goes wrong, and something always goes wrong eventually.
Common failure modes include: one founder loses interest and stops working but expects to keep the original equity, one founder takes a competing job and continues to claim shares, the team disagrees on strategic direction and one wants to leave, a fourth person joins later and demands equity that comes from somewhere, an early investor demands vesting that was never put in place, an acquirer's due diligence reveals that none of the IP was actually assigned to the company. Each of these is recoverable if there is a clear written agreement. Each is potentially fatal if there is not.
Sophisticated investors will not invest in a startup that does not have founders' equity properly documented and vesting. Acquirers will not buy a company without confirming that the founders' IP belongs to the company. Every later employee asks about the founders' equity arrangement before joining. The founders agreement is therefore not optional. It is the foundation that everything else rests on.
The cost of putting an agreement in place at the start is modest. The cost of putting one in place later, after a dispute has already started or an investor has demanded it, is many times higher. The window in which founders can negotiate a clean agreement, while everyone is still aligned and friendly, is short. Most experienced startup attorneys recommend completing the founders agreement within the first three to six months of forming the company, before significant work has been done.
What a Founders Agreement Covers
A complete founders agreement addresses several distinct subject areas. Each can be the subject of meaningful negotiation, and each is read carefully by later investors and counsel.
Equity Allocation
The first subject is who owns what percentage of the company. The allocation should reflect the value each founder brings to the venture, the contributions each is expected to make going forward, and the risk each is taking. Equal splits among co-founders are common but not always appropriate. A founder who brings a critical patent, a founder who is leaving a six-figure job while another is between jobs, or a founder who is committing to full-time work while another remains part-time has a different value proposition that may justify a different allocation.
The allocation conversation is uncomfortable for many founding teams and is often deferred. Deferring is a mistake. The conversation is much easier early on, when no one has been working for months and forming attachments to expected outcomes. Once founders have been working for six months without an agreement, the conversation often produces resentment regardless of the outcome, because every choice now feels like it is taking something away from someone.
Vesting
Vesting is the mechanism by which founders earn their equity over time. The standard structure has founders subject to a four-year vesting schedule, often with a one-year cliff, meaning that no equity vests until the founder has completed one full year, and then a portion vests at that one-year mark with the rest vesting monthly or quarterly over the remaining three years.
Without vesting, a co-founder who leaves the company after three months walks away with their full equity grant. Vesting solves that problem: the departing founder leaves with only the portion that has vested, and the company recovers the unvested portion to redistribute to other founders or new hires. Vesting protects the team against unilateral departures and gives the company a real incentive structure for founders to stay through the building phase.
Investors universally require founders to be on vesting schedules before they will invest. Founders who have been on the cap table for two years without vesting create a problem at the next financing because the investor will demand vesting as a closing condition, often with restart dates that take into account some but not all of the time already worked. Putting vesting in place at formation avoids that future negotiation.
Roles and Responsibilities
The agreement should describe what each founder is expected to do. Roles can be general (CEO, CTO, CPO) or more specific (responsibility for fundraising, engineering, sales, operations). Specificity helps avoid disputes when one founder feels another is not pulling their weight. The roles should also include time commitment: full-time, part-time, advisory.
The roles section is sometimes seen as touchy because it forces explicit recognition of who is leading what. It should be drafted clearly anyway. Vague descriptions create more friction in the long run than honest descriptions do.
Decision-Making
The agreement should explain how the founders make decisions. Common structures include: simple majority, supermajority for designated decisions, unanimous for designated decisions, or one founder having a tiebreaker role on operational matters with major decisions requiring multi-founder approval.
Decision-making rules become important at moments of disagreement. A two-founder company with a 50-50 split and no tiebreaker mechanism can deadlock entirely on a major decision, and the only resolution may be litigation or company dissolution. The agreement should specify either how ties are broken or what happens when they cannot be.
Intellectual Property Assignment
Every founder must assign all IP related to the company's business to the company. This is the single most important provision in the agreement from an acquirer's perspective and is the subject of every meaningful due diligence review. A founder who developed the company's core technology and never executed an IP assignment to the company technically still owns it personally, and a buyer cannot acquire the company without separately negotiating with that founder for the IP.
The assignment should be present-tense and broad: the founder assigns to the company all IP related to the company's business that the founder has developed or will develop. The assignment should cover code, designs, brand materials, trade secrets, and any related know-how. The agreement should also include a representation that the founder has not previously assigned the IP to anyone else, including a prior employer.
Confidentiality and Non-Competition
Founders should be subject to confidentiality obligations protecting the company's information and to some form of restriction on competing with the company while they are working there. The scope and enforceability of post-departure non-compete provisions are limited under New York law, and the agreement should be drafted with awareness of those limits. Confidentiality, however, is generally enforceable without geographic or time limit. For broader context, our guide to restrictive covenants in New York walks through enforceability standards.
Departure and Buyback
The agreement should explain what happens when a founder leaves, voluntarily or involuntarily. Standard provisions include: unvested equity returns to the company, vested equity may be subject to repurchase by the company at fair market value or a defined formula, and the departing founder is released from forward-looking obligations but remains bound by confidentiality and IP assignment.
Termination for cause typically results in different consequences than voluntary departure or termination without cause. The cause definition matters and should be specific (fraud, criminal conduct, material breach of the agreement) rather than vague (failure to perform satisfactorily). Vague cause definitions invite disputes that the company is unlikely to win cleanly.
How Equity Vesting Works
Vesting is the most technically intricate part of the founders agreement and deserves a focused walkthrough. The standard structure has been remarkably stable in startup practice for two decades.
Four-Year Schedule with One-Year Cliff
The default vesting schedule is four years total with a one-year cliff. Under this structure, no equity vests for the first year. At the end of the first year (the cliff), a portion vests in a single step, typically 25 percent of the grant. From then on, the remaining 75 percent vests in equal monthly or quarterly increments over the remaining three years. A founder who completes the full four years owns 100 percent of the grant.
The one-year cliff serves a specific purpose: it filters out founders who lose interest or are unsuitable within the first year. A founder who leaves before the cliff walks away with zero vested equity. A founder who completes the cliff has demonstrated commitment to the company and earned a substantial equity stake.
Variations exist. Some companies use a longer cliff (eighteen months) or no cliff at all (continuous vesting from day one). Some use a shorter total schedule (three years total) or a longer one (five or six years). The market default is four years with a one-year cliff, and most investors expect to see something close to it.
Acceleration Triggers
Acceleration is a provision that causes some or all unvested equity to vest immediately upon a defined event. The two most common acceleration triggers are: single-trigger acceleration on change of control (the company is sold, and all unvested equity vests automatically) and double-trigger acceleration (the company is sold, and the founder is terminated without cause or constructively terminated within a defined period after the sale, at which point unvested equity vests).
Double-trigger is the more common structure because it preserves the acquirer's ability to retain the founder post-acquisition by treating the founder fairly. Single-trigger benefits the founder more but is seen by acquirers as creating misaligned incentives because the founder has no economic reason to stay post-acquisition. Most sophisticated investors prefer double-trigger structures.
Some agreements also include acceleration on termination without cause even outside the change of control context. This provides additional protection to founders against being unfairly removed and is more founder-favorable than the default. The negotiation of acceleration provisions is one of the more contested elements of any founders agreement.
Restricted Stock and 83(b) Elections
Founder equity is typically issued as restricted stock, not options. The shares are issued to the founder at formation and are subject to repurchase by the company on unvested portions if the founder leaves. The founder is the legal owner of the shares from day one but cannot sell or transfer them while they are subject to the repurchase right.
When restricted stock is issued, the founder typically files an 83(b) election with the IRS within 30 days. The 83(b) election treats the entire grant as taxable income at the time of grant, when the shares have minimal value, rather than as ordinary income when vesting occurs. The election can save the founder substantial tax in the long run because future appreciation is taxed as capital gain rather than ordinary income.
The 83(b) election is one of the most important administrative steps in any startup. Missing the 30-day deadline can have severe tax consequences down the line. Founders should confirm with their attorney and accountant that the election has been timely filed and have a copy of the filed election in their records.
Founders Agreement in the Context of Entity Formation
The founders agreement sits alongside the company's other foundational documents. For a corporation, those include the certificate of incorporation, the bylaws, the initial board consent, and the stock purchase agreements with each founder. For an LLC, the equivalents are the certificate of formation and the operating agreement, with the founders' arrangement potentially integrated directly into the operating agreement or maintained as a separate document.
Most startups planning to raise venture capital form as Delaware C corporations. Delaware's corporate law is well-developed, predictable, and familiar to investors and their counsel. New York corporations are workable but less commonly used for venture-backed startups. LLCs can work for early-stage companies that do not plan to raise venture capital or that have a small number of founders content with pass-through tax treatment, but the LLC structure becomes awkward for venture financing because most institutional investors prefer to invest in corporations.
Once the entity is formed, the founders agreement is documented either as a separate document or, more commonly, through a combination of the stock purchase agreements (which contain the vesting provisions for each founder), the bylaws (which address decision-making), and a shareholders agreement among the founders (which addresses governance issues among them). The exact document architecture varies by attorney and by company circumstances.
For a deeper walk-through of entity formation, see our starting a business in NY guide and our LLC vs corporation guide. The choice of entity shapes how the founders arrangement is documented, but the substantive issues addressed in this article apply in either structure.
How the Founders Agreement Interacts with Later Financing
Every later investor reviews the founders arrangement carefully before investing. Founders who have a clean arrangement in place at formation save themselves significant friction at the next financing. Founders who do not face restructuring as a condition of the financing.
The investor's review typically covers: confirmation that all founders have signed the founders agreement, confirmation that the vesting schedules are reasonable and that the founders have meaningful unvested equity remaining at the time of investment, confirmation that IP assignments are in place and complete, confirmation that 83(b) elections have been timely filed, and confirmation that the cap table reflects what the founders agreement and stock purchase agreements provide.
Discrepancies surfaced during financing diligence have to be resolved before the investor will close. Resolution often involves new agreements being signed, new vesting schedules being imposed, IP being formally assigned, or other clean-up work. The clean-up is expensive and time-consuming, and it eats into the founders' time during a phase when they should be focused on the business. Founders who set up the arrangement properly at formation avoid this burden entirely.
For coverage of the financing instruments themselves, our SAFE and convertible note financing guide walks through the seed-stage instruments, and our shareholder agreement guide covers the broader governance arrangements that come into play once outside investors are involved.
Common Mistakes Founding Teams Make
Several recurring problems show up when founders agreements are reviewed years after they were drafted. Each is preventable with care at formation.
- Working without an agreement for too long. Founders who work together for a year without a written agreement create the conditions for an expensive dispute when interests diverge. The longer the gap, the harder the eventual negotiation.
- Equal splits that do not reflect actual contribution. Splitting equity 50-50 or 33-33-33 by default without analyzing actual contributions creates resentment when one founder turns out to be doing most of the work. The split should be calibrated to the realistic contribution profile.
- No vesting. Founder equity issued without vesting is a magnet for later restructuring. Every investor will demand vesting, and unvested equity that has already been issued has to be brought into vesting through an amended agreement.
- Missing the 83(b) deadline. The 30-day deadline for filing the 83(b) election is rigid. Missing it cannot be cured later and can produce severe tax consequences as the equity appreciates.
- Incomplete IP assignment. A founder who developed company technology before formally signing an IP assignment to the company technically still owns it. The assignment must be present-tense and broad, covering everything related to the business.
- Vague decision-making rules. A two-founder company with a 50-50 split and no tiebreaker mechanism is one disagreement away from deadlock. Vague rules invite the same problem.
- No termination or buyback provisions. Without provisions for what happens when a founder leaves, the company has no clean mechanism to recover unvested equity or repurchase vested equity at a fair price.
- Treating the agreement as a template fill-in. Founders agreements are not interchangeable. The decisions about allocation, vesting, acceleration, decision-making, and buyback should be made deliberately based on the specific team and circumstances. Pulling a template off the internet and changing the names is a recipe for problems.
How Agarunov Law Firm Helps Founding Teams
At Agarunov Law Firm we represent founders, founding teams, and early-stage companies through entity formation, founders agreement negotiation and drafting, equity issuance with vesting and 83(b) elections, IP assignment and confidentiality protection, and the broader corporate housekeeping that accompanies a venture-bound startup. We also represent founders departing from companies, handling the negotiation of separation terms, repurchase of unvested equity, and any disputes that arise. Our office at 30 Broad Street in Manhattan's Financial District serves clients throughout New York City and the broader region. For broader business law context, our New York business law practice page describes the full scope of representation we offer. For follow-on financing work, our SAFE and convertible note financing guide covers the next step in the typical startup capitalization arc.
Frequently Asked Questions
What is a founders agreement?
A founders agreement is the contract among the people starting a company that defines equity ownership, expected contributions, decision-making rules, what happens if a founder leaves, intellectual property assignment, confidentiality, and any restrictions on competition. It is the single most important early document a startup signs and is reviewed carefully by every later investor and acquirer. A founding team that has not put a real agreement in place is one personnel change away from a deeply expensive dispute.
What is the standard vesting schedule for startup founders?
The standard structure is four years total with a one-year cliff. No equity vests for the first year. At the end of the first year, 25 percent vests in a single step. From then on, the remaining 75 percent vests in equal monthly or quarterly increments over the remaining three years. A founder who completes the full four years owns 100 percent of the grant. The one-year cliff filters out founders who lose interest or are unsuitable within the first year. Variations exist but most investors expect to see something close to this default.
What is single-trigger vs double-trigger acceleration?
Single-trigger acceleration means all unvested equity vests automatically when the company is sold, regardless of what happens to the founder post-sale. Double-trigger acceleration means the unvested equity vests only if the company is sold AND the founder is terminated without cause or constructively terminated within a defined period after the sale. Double-trigger is more common because it preserves the acquirer's ability to retain the founder post-sale by treating the founder fairly. Single-trigger benefits the founder more but is seen by acquirers as misaligning incentives.
What is an 83(b) election and why does it matter?
An 83(b) election is a filing with the IRS that treats restricted stock as taxable income at the time of grant, when the shares have minimal value, rather than as ordinary income at the time of vesting. By electing 83(b), the founder pays minimal tax at grant and benefits from capital gains treatment on future appreciation. Without the election, the founder is taxed on the difference between the share value at vesting and the price paid, which can be substantial as the company appreciates. The election must be filed within 30 days of the equity grant. Missing the deadline cannot be cured and can have severe tax consequences.
Do all founders have to be on the same vesting schedule?
No, although same-schedule arrangements are most common. Different founders can be on different vesting schedules to reflect different circumstances, including different start dates, different contribution profiles, or different employment status (full-time versus part-time). Founders who join later than other founders typically start their vesting from their actual join date, not from the original company formation date. Investor review at later financings looks at whether the schedules are reasonable as a whole rather than insisting on uniformity.
What happens to a founder's equity if they leave the company?
Under a well-drafted founders agreement, the departing founder keeps their vested equity and forfeits any unvested portion back to the company. The vested equity may be subject to repurchase by the company at fair market value or a defined formula. The departing founder is typically released from forward-looking obligations but remains bound by confidentiality, IP assignment, and any post-departure restrictions. The specific consequences depend on whether the departure is voluntary, involuntary without cause, or for cause, and on the specific provisions of the agreement.
How does the founders agreement get reviewed at the next financing?
Every later investor reviews the founders arrangement carefully. The review covers whether all founders have signed, whether vesting schedules are reasonable and meaningful unvested equity remains, whether IP assignments are in place and complete, whether 83(b) elections have been timely filed, and whether the cap table reflects the documented arrangement. Discrepancies surfaced during diligence have to be resolved before the investor will close, often through amended agreements or restart of vesting schedules. Founders who set up the arrangement properly at formation avoid this burden at every later financing.
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