Founder Equity and Vesting When a Cofounder Leaves

By Hank FasthoffJuly 5, 2026

Founder equity determines who owns the company after a departure. Vesting determines how much of an approved grant the departing founder keeps. If founders receive all their equity without service conditions, a founder who leaves after a few months may retain the same ownership as founders who spend years building the business.

The company’s records must connect each grant to the entity that issued it, the consideration paid, the service conditions, and a valid repurchase or forfeiture mechanism. A corporation issues shares or options through corporate approvals and stock documents. An LLC issues membership interests or options under its company agreement and grant documents, with tax consequences that depend on the LLC’s federal classification.

Founder Equity Begins With an Authorized Issuance

A corporation must exist before it issues stock. After formation, the board or a delegate acting under a valid board authorization approves the number and class of shares, the consideration, the vesting terms, and the stock purchase agreement. Each founder signs the agreement, pays the approved purchase price, assigns relevant intellectual property, and receives evidence of the issuance in the stock ledger.

Par value and fair market value serve different purposes. A certificate of formation or incorporation may state a nominal par value, but that amount doesn’t establish the stock’s fair market value for federal tax purposes. Texas Business Organizations Code Sections 21.159 through 21.161 and Sections 152 and 153 of the Delaware General Corporation Law govern consideration and corporate authorization under their respective statutes.

An LLC uses its company agreement, written approval, and interest grant documents to authorize founder interests. If the LLC is taxed as a partnership, the documents must distinguish a capital interest from a profits interest because the two interests receive different federal tax treatment.

Securities law applies even when the recipients founded the company. Each issuance must qualify for an exemption from federal and state registration or be registered. SEC Rule 701 exempts specified compensatory sales by nonreporting companies to eligible employees, directors, consultants, and advisors. It applies only when its compensation, eligibility, amount, and disclosure conditions are satisfied. Another exemption may apply when founders buy securities as part of the company’s capitalization rather than as compensation.

Reverse Vesting Uses a Repurchase or Forfeiture Right

Founders commonly buy restricted shares when the corporation is formed. The company receives a right to repurchase the unvested shares if the founder’s service ends. Lawyers often call that arrangement reverse vesting. The founder owns the issued shares from the outset, while the company’s repurchase right decreases under the vesting schedule.

An option uses a different structure. It provides a contractual right to buy shares after vesting and exercise. Restricted stock has already been issued, subject to service conditions and the remedies in the stock purchase agreement.

The agreement should define the service that earns vesting, the vesting commencement date, the schedule, the events that end service, and the treatment of leaves of absence. It should also state whether service as an employee, officer, director, or consultant counts and whether a change in role affects vesting.

A Four Year Schedule Often Includes a One Year Cliff

Venture backed companies commonly use a four year schedule with no vesting during the first 12 months. At the first anniversary, 25% vests at once. The balance then vests in 36 equal monthly installments. Founders may negotiate a different schedule or receive credit for service performed before formation.

Suppose a founder receives 2,400,000 shares. At month 12, 600,000 shares vest. Another 50,000 shares vest each month, producing 1,200,000 vested shares at month 24 and 1,500,000 vested shares at month 30. If the founder leaves at month 30, the company can recover the remaining 900,000 shares only under the signed agreement and applicable law.

The documents should state any credited service date. A vague promise to recognize work performed before formation can produce competing ownership calculations when a founder leaves or investors review the capitalization table.

Section 83(b) Has a 30 Day Deadline

Section 83 generally taxes property transferred for services when the recipient’s rights first become transferable or cease to be subject to a substantial risk of forfeiture. For restricted stock, that rule can produce ordinary income as portions vest, based on fair market value at vesting minus the amount paid.

A Section 83(b) election changes the timing. The founder includes the stock’s fair market value at transfer, less the purchase price, in income for the transfer year without regard to restrictions that will lapse. If the founder later forfeits the stock, the founder generally can’t deduct the income previously recognized through the election.

The election must be filed no later than 30 days after the property transfer. If day 30 falls on a Saturday, Sunday, or legal holiday, Section 7503 treats an election postmarked on the next business day as timely. Board approval, signing, payment, and entry in the stock ledger may occur on different dates. The company and founder should document a consistent transfer date in the issuance records.

Form 15620 provides the current IRS form, but a signed statement satisfying Treasury Regulation Section 1.83-2 also qualifies. The founder can submit Form 15620 electronically through an IRS online account using the IRS mobile friendly forms system, or mail it to the IRS office where the founder files a federal income tax return. The person making the election must also provide a copy to the service recipient and, if the service provider and transferee differ, to the transferee. Proof of timely submission should accompany the signed election and equity records.

An election applies to transferred property. Section 83 generally excludes an unexercised option without a readily ascertainable fair market value, so a founder can’t treat the grant of an ordinary unexercised option as a restricted stock transfer. The type of award and the transfer date must be confirmed before calculating the deadline.

LLC Capital and Profits Interests Use Different Tax Rules

An LLC taxed as a partnership may issue a capital interest or a profits interest. A capital interest entitles the holder to part of the proceeds if the LLC sold its assets at fair market value and liquidated when the interest was granted. A profits interest generally participates in future profits and appreciation without receiving existing liquidation value.

Revenue Procedure 93-27, 1993-2 C.B. 343, provides a safe harbor for a profits interest received for services in a partner capacity or in anticipation of becoming a partner. The safe harbor excludes an interest tied to a substantially certain and predictable stream of income from partnership assets, an interest the partner disposes of within two years of receipt, and a limited partnership interest in a publicly traded partnership. A grant outside the safe harbor requires separate tax analysis.

Revenue Procedure 2001-43 addresses a qualifying profits interest subject to vesting. The LLC and service provider must treat the recipient as an owner from the grant date, report the recipient’s distributive share during the vesting period, claim no compensation deduction for the interest, and satisfy the other conditions of Revenue Procedure 93-27. When those requirements are met, the service provider needn’t file a Section 83(b) election.

Capital interests, nonqualifying profits interests, and LLCs with another tax classification require different treatment. The company agreement, grant document, capital accounts, tax reporting, and any election must use the same classification.

Acceleration Terms Require Defined Events

Acceleration permits some or all unvested equity to vest when specified events occur. Single trigger acceleration uses one event, commonly a change of control. Double trigger acceleration requires a change of control plus a second event, commonly termination without cause or resignation for good reason during a defined period after the transaction.

The agreement should define change of control, cause, good reason, and the period for the second trigger. It should also address whether an acquirer may assume, replace, cash out, or terminate the award. The label “double trigger” supplies none of those terms.

Acceleration allocates transaction value and retention risk. Founders may seek protection if an acquirer removes them after closing, while investors and buyers may require continued service. The portion accelerated and the triggering events should record that bargain before a sale begins.

The Signed Agreements Govern a Founder Departure

A departing founder’s signed agreements establish the vesting calculation and the company’s remedies. Service termination may leave unvested shares outstanding until an automatic forfeiture or repurchase provision takes effect. A repurchase right must state the exercise period, price, notice, approval, and payment procedure. Missing a contractual deadline can leave the shares with the departed founder.

Vested shares may remain subject to rights of first refusal, transfer restrictions, obligations to join a sale, company purchase rights, or other valid restrictions. A founder who vested 62.5% of a grant covering 2,400,000 shares may keep 1,500,000 shares after departure, subject to those provisions.

If the company may buy vested shares at fair market value, the agreement should define the valuation date, valuation standard, permitted discounts, appraisal process, payment terms, and dispute procedure. Without those mechanics, the parties may exchange an ownership dispute for a valuation dispute.

State Law Limits Repurchases and Transfer Restrictions

Corporate law may prevent payment for shares even when the contract authorizes a repurchase. Delaware General Corporation Law Section 160 generally prohibits a corporation from purchasing or redeeming its shares when capital is impaired or the transaction would impair capital, subject to statutory exceptions. Texas Business Organizations Code Sections 21.302 and 21.303 govern distributions and impose solvency and distribution limits.

Transfer restrictions also depend on statutory requirements and notice. Delaware General Corporation Law Section 202 permits specified written restrictions and addresses notice on certificates and notices for uncertificated shares. Texas Business Organizations Code Sections 21.210 through 21.213 authorize reasonable restrictions, including purchase obligations and rights of first refusal, subject to the statute’s requirements.

For a Texas LLC, Section 101.052 permits the company agreement to govern many relations among members and the company, subject to limits on contractual modification. The company agreement or an incorporated grant document should contain the vesting, forfeiture, repurchase, transfer, valuation, and payment provisions.

Financing Review Tests the Equity Record

Investors commonly review the certificate of formation, board or member approvals, purchase agreements, vesting schedules, Section 83(b) records, capitalization table, intellectual property assignments, and securities exemption records. Missing approvals or inconsistent documents can delay financing and affect the terms investors require.

A financing may require founders to accept new vesting terms, correct prior issuances, surrender shares, or sign additional restrictions. Those changes require the approvals and consents specified by law and the existing documents. A board resolution alone can’t rewrite a founder’s signed contract or take vested property without legal authority.

Promised equity presents a different problem from issued equity. Emails, offer letters, or handshake terms may support contract or other claims without establishing a completed issuance. The company’s formation date, approvals, consideration, signed documents, ledger, and tax records show whether the founder received an ownership interest and on what terms.

A Departure Requires Corporate and Operational Records

The departure review begins with the service termination date and the vesting calculation under the signed agreement. The company then follows each notice, approval, payment, and deadline requirement for an automatic forfeiture, repurchase of unvested shares, or exercise of rights over vested shares.

Corporate records should reflect the result. The stock ledger or LLC ownership schedule, capitalization table, voting records, and tax records should show the updated ownership. Purchase agreements, approvals, notices, payment evidence, and Section 83(b) records provide the supporting history.

Operating roles require separate treatment from equity ownership. Departure documents address resignations from officer and board positions, account credentials, and company property. They also cover confidentiality and invention assignment obligations, plus access to customer, financial, code, and platform accounts.

Any separation or release agreement must match the equity documents. It identifies the shares retained or recovered, payment terms, intellectual property obligations, continuing restrictions, and released claims. Consistent approvals, signed agreements, tax filings, and ownership records determine who owns the company after the founder leaves.