Summary. Equity compensation is the most common way private companies pay people they cannot afford, and the area where well-intentioned founders create the most expensive tax problems. This article covers stock options and the ISO/NSO divide, restricted stock and the thirty-day § 83(b) election that cannot be extended, RSUs and double-trigger vesting, and profits interests, the LLC answer to options. A long section explains § 409A — what it covers, why a discounted option violates it, what a 409A valuation buys, and the penalties. Later sections address vesting and acceleration, repurchase and transfer restrictions, dilution, qualified small business stock, and exit mechanics.

Two engineers join the same startup in the same month. Both are promised "one percent of the company."

The first receives 100,000 shares of restricted stock at $0.001 per share, pays $100, and files an 83(b) election within thirty days. Four years later the company sells for $180 million. Her shares are worth $1.8 million, taxed at long-term capital gains rates, and — because the company was a C corporation that met the requirements — potentially excluded entirely under Section 1202.

The second receives an option to buy 100,000 shares. Nobody explains the exercise mechanics. He leaves after three years with vested options he cannot afford to exercise, because exercising would trigger a $340,000 alternative minimum tax bill on stock he cannot sell. His 90-day post-termination exercise window runs. The options expire.

Same promise. Same company. Same outcome for the company. A difference of roughly $1.8 million for the two people, driven entirely by instrument choice and by a thirty-day filing deadline.

The short answer

Four main instruments in private companies:

  • Stock options — the right to buy shares at a fixed price. ISOs (incentive stock options) have favorable tax treatment but strict requirements and employee-only eligibility. NSOs (nonqualified options) are flexible and taxed as ordinary income at exercise on the spread.
  • Restricted stock — actual shares issued now, subject to forfeiture until vested. Cheapest tax outcome if issued early at low value and an 83(b) election is filed within 30 days.
  • RSUs — a contractual promise to deliver shares on vesting. Common at later-stage and public companies; private companies use double-trigger vesting to avoid taxing illiquid stock.
  • Profits interests — the LLC/partnership analogue, granting a share of future appreciation with no value at grant and, if structured under the safe harbors, no tax at grant.

The two rules that cause the most damage:

  1. The 83(b) election must be filed with the IRS within 30 days of transfer. There is no extension, no reasonable cause relief, and no fix.
  2. Section 409A taxes discounted options punitively. Options must be granted with an exercise price at or above fair market value, supported by a defensible valuation.

Stock options

An option grants the right to purchase a fixed number of shares at a fixed exercise price (strike) for a fixed period, subject to vesting.

Incentive stock options

ISOs are governed by 26 U.S.C. § 422 and offer the best tax treatment available for options — if every requirement is met:

  • Granted under a shareholder-approved plan, to an employee (not a contractor or director in that capacity), of the corporation or a parent or subsidiary.
  • Exercise price at least fair market value at grant (110 percent for a 10 percent shareholder).
  • Term no more than 10 years (5 for a 10 percent shareholder).
  • $100,000 limitation: the aggregate fair market value at grant of stock for which ISOs first become exercisable in any calendar year cannot exceed $100,000; the excess is treated as an NSO.
  • Must be exercised within 3 months after termination of employment (12 months for disability, and the requirement is waived on death) to retain ISO status.
  • Nontransferable except at death.

Tax treatment. No regular income tax at grant or exercise. But the spread at exercise is an alternative minimum tax adjustment, which is the single most common unpleasant surprise in startup compensation. If the holder satisfies the holding periods — more than two years from grant and more than one year from exercise — the entire gain on sale is long-term capital gain. Selling earlier is a disqualifying disposition: the spread at exercise becomes ordinary compensation income, and the balance is capital gain.

Early exercise. Some plans permit exercising unvested options, with the purchased shares subject to a repurchase right. Combined with a timely 83(b) election, this starts the capital gains clock early and minimizes AMT exposure because the spread at exercise is near zero. It requires cash up front and real risk tolerance.

Nonqualified stock options

Everything that is not an ISO. Available to employees, contractors, directors, and advisers.

Tax treatment. No tax at grant (if priced at fair market value and 409A-compliant). At exercise, the spread between fair market value and exercise price is ordinary income, subject to withholding for employees and reportable on Form 1099-NEC for contractors. The company gets a corresponding deduction. Subsequent appreciation is capital gain from the exercise date.

The practical problem is the same for both types: exercising requires cash for the strike price, and for NSOs also cash for withholding, at a moment when the stock cannot be sold. Employees leave, cannot fund the exercise, and forfeit years of vesting.

Mitigations worth designing in:

  • Extended post-termination exercise periods — 5 or 10 years instead of 90 days. Note that extending an ISO's exercise window beyond 3 months converts it to an NSO.
  • Cashless or net exercise where the company withholds shares to cover the price and taxes.
  • Company loans to fund exercise (with care — recourse issues and, for public companies, the Sarbanes-Oxley prohibition on personal loans to executives).
  • Secondary sale programs or tender offers providing liquidity.
  • The 83(i) election under 26 U.S.C. § 83(i), which allows qualified employees of eligible private corporations to defer income on qualified stock for up to five years. Its conditions are strict — including a written plan offering equity to at least 80 percent of US employees in the same year — and adoption has been limited.

Restricted stock and the 83(b) election

Restricted stock is actual stock, issued now, subject to a substantial risk of forfeiture — typically a repurchase right at cost that lapses on a vesting schedule. The holder is a shareholder from day one, with voting rights and, usually, dividend rights.

Default tax treatment, 26 U.S.C. § 83(a): the recipient recognizes ordinary income as the shares vest, equal to the fair market value at vesting minus the amount paid. For a company whose value is rising, that is exactly backwards — it taxes the recipient at increasing values, in cash they do not have, on stock they cannot sell.

The 83(b) election flips it. By filing an election, the recipient chooses to be taxed at transfer on the value then, minus what was paid. For a founder receiving stock at formation at $0.0001 per share, the taxable amount is approximately zero. All subsequent appreciation is capital gain, and the holding period starts immediately.

The rules, and why they end companies' equity plans:

  • The election must be filed with the IRS no later than 30 days after the date of transfer, Treas. Reg. § 1.83-2(b).
  • The 30 days are calendar days, and the deadline cannot be extended. There is no reasonable cause exception, and private letter rulings will not save a late filing.
  • A copy must be provided to the company; the requirement to attach a copy to the recipient's tax return was eliminated, but the filing itself was not.
  • File by certified mail, return receipt requested, and keep the receipt forever. The most common evidentiary problem is a taxpayer who filed and cannot prove it.
  • An election may be revoked only with IRS consent, and generally only for a mistake of fact.

The downside is real: if the stock later becomes worthless or the recipient forfeits before vesting, the tax paid is not recoverable, and no loss deduction is allowed for the amount previously included. For stock with meaningful value at grant, that is a genuine gamble. For founder stock at nominal value, it is close to free.

Restricted stock units

An RSU is a contractual promise to deliver shares (or cash) at a future date. It is not stock; the holder has no voting rights and nothing to elect under § 83(b) because no property is transferred at grant.

Tax treatment. Ordinary income at settlement, when shares are delivered, equal to the fair market value then, subject to withholding.

Why private companies use double-trigger vesting. With single-trigger (time-based) RSUs, an employee at a private company owes ordinary income tax on vesting, in cash, on illiquid stock. That is untenable. So private company RSUs typically require two conditions: a service condition (time vesting) and a liquidity condition (an IPO or change of control). Nothing is taxable until both occur.

The 409A trap in RSU design. The liquidity condition must be structured so the award is either exempt from § 409A under the short-term deferral rule or compliant with it. RSUs that settle on a date the company can effectively choose, or that permit deferral without complying with § 409A's election rules, are a common source of violations.

Profits interests: the LLC answer

An LLC or partnership cannot grant ISOs, and granting an equity interest with current value creates immediate taxable income. The solution is the profits interest.

A profits interest entitles the holder to a share of future profits and appreciation only — nothing if the company were liquidated at fair value on the grant date. Because its liquidation value at grant is zero, the recipient recognizes no income at grant.

The safe harbors. Revenue Procedure 93-27 provides that the receipt of a profits interest for services is generally not a taxable event, subject to exceptions (a predictable income stream from high-quality assets, disposition within two years, or an interest in a publicly traded partnership). Revenue Procedure 2001-43 extends the treatment to unvested profits interests, provided the partnership and the recipient treat the recipient as a partner from the grant date and no deduction is taken.

Design requirements:

  • Set a hurdle or threshold value equal to the entity's value at grant, so the holder shares only in appreciation above it. Document the valuation.
  • Amend the operating agreement's distribution waterfall to implement the hurdle.
  • The holder becomes a partner for tax purposes — which means a K-1 instead of a W-2, no employee withholding, self-employment tax on allocated income, and loss of participation in employee benefit plans as an employee. This surprises recipients constantly and should be explained in writing before grant.
  • Consider a protective 83(b) election. It is not required under Rev. Proc. 2001-43 for unvested profits interests treated properly, but practitioners commonly file one as insurance, and proposed regulations have contemplated a different regime.

Alternatives in an LLC: capital interests (taxable at grant on value received), options on LLC units (workable but awkward), and phantom units (contractual cash payments, taxed as ordinary income, no equity conveyed).

Section 409A

Section 409A of the Internal Revenue Code governs nonqualified deferred compensation — broadly, a legally binding right to compensation payable in a later year. It was enacted after Enron and it is unforgiving.

Why options are implicated. An option granted with an exercise price below fair market value at grant provides deferred compensation, because the holder has a built-in right to value in a later year. Such a discounted option violates § 409A unless it complies with the payment timing rules, which options structurally cannot.

The consequences of a violation, 26 U.S.C. § 409A(a)(1)(B), fall on the recipient, not the company:

  • Immediate income inclusion of the vested deferred amount, in the year of vesting, even though nothing has been received.
  • An additional 20 percent federal penalty tax.
  • A premium interest charge computed from the year of deferral.
  • Several states impose their own additional tax; California's has been reduced but still applies.

The exemption for options. An option on service recipient stock is exempt if:

  • The exercise price is never less than fair market value on the grant date;
  • The number of shares is fixed at grant;
  • The stock is common stock (subject to limitations on preferences); and
  • The option has no deferral feature beyond the exercise period.

The 409A valuation. For a private company, fair market value must be determined by a reasonable application of a reasonable valuation method, Treas. Reg. § 1.409A-1(b)(5)(iv). The regulation supplies presumptions of reasonableness:

  • An independent appraisal performed within the prior 12 months;
  • An illiquid startup valuation by a qualified person, for a corporation less than 10 years old with no public market and no expected change of control or IPO within 12 months, written and reasonably applied; or
  • A formula method meeting specified conditions and used consistently.

Where a presumption applies, the burden shifts to the IRS to show the valuation was grossly unreasonable. That burden shift is what a 409A valuation actually buys.

When to refresh. At least every 12 months, and after any material event: a financing round, a significant acquisition or divestiture, a major customer win or loss, an unsolicited offer, or a change in the business plan. Boards that grant options six months after a priced round using the pre-round valuation are creating discounted options.

"Cheap stock" in an IPO. Underwriters and auditors review grants made in the run-up to a public offering. Grants priced too low produce a non-cash compensation charge and disclosure — a separate, accounting-side reason to keep valuations current.

Correction. IRS Notices 2008-113 and 2010-6 provide correction programs for operational and document failures, with reduced penalties for corrections in the same year or within two years. Correction is available; it is narrow and technical, and it is far cheaper than a failure discovered on audit.

Vesting, acceleration, and termination

Standard vesting is four years with a one-year cliff: nothing vests until the first anniversary, then monthly or quarterly thereafter. The cliff exists so that a hire who does not work out leaves with nothing.

Founder vesting should exist too. A co-founder who departs in month five holding 40 percent of an unvested-free company is the most damaging and most preventable early-stage failure. Investors will insist on it; founders should adopt it before investors arrive.

Acceleration on change of control:

  • Single trigger — vesting accelerates on the transaction itself. Buyers dislike it because it removes retention.
  • Double trigger — acceleration requires the transaction and a qualifying termination (without cause, or a resignation for good reason) within a stated window, commonly 12 months. This is the market standard and the right default.
  • Define cause and good reason precisely. A vague "good reason" definition is either useless to the employee or a liability to the buyer.

Termination mechanics to specify:

  • The post-termination exercise period (default 90 days; longer periods are increasingly common and convert ISOs to NSOs after 3 months).
  • Treatment on death and disability.
  • Whether unvested shares are repurchased at cost and vested shares at fair market value or cost.
  • Whether a "for cause" termination forfeits vested equity — a harsh but common provision worth negotiating.

Repurchase and transfer restrictions, usually in the plan and the stock purchase agreement:

  • Right of first refusal on any proposed transfer.
  • Company repurchase right on termination, with a stated period and price mechanism.
  • Drag-along obligating minority holders to join an approved sale.
  • Market standoff / lock-up agreement for an IPO.
  • Voting agreement or proxy.

These restrictions are what keep a cap table manageable. Without them, a departed employee's shares can end up with an ex-spouse, a creditor, or a competitor.

Securities law and administration

Equity grants are securities issuances and need an exemption:

  • Rule 701, 17 C.F.R. § 230.701, is the workhorse for private company compensatory issuances. It caps the amount issuable in a 12-month period by a formula and requires additional disclosure — including risk factors and financial statements — once aggregate sales in a 12-month period exceed the applicable threshold. Companies routinely blow through the disclosure threshold without noticing.
  • Section 4(a)(2) and Regulation D for grants outside Rule 701, including to entities and certain advisers.
  • Blue sky filings in states that require them.
  • Form S-8 after an IPO.

Administration that prevents most problems:

  • A board-approved plan, shareholder-approved if ISOs are to be granted.
  • Board approval of every grant, by resolution, with grant date, number, price, vesting, and type recorded. Backdating is not a gray area.
  • Signed award agreements returned and retained.
  • A maintained cap table with a fully diluted view including the option pool, warrants, and convertible instruments.
  • 83(b) tracking — a checklist item confirming filing and proof of mailing for every restricted stock issuance.
  • Annual 409A refresh and a refresh after material events.
  • Withholding and reporting — Form W-2 for employees, 1099-NEC for contractors, Form 3921 for ISO exercises, Form 3922 for ESPP transfers.

Qualified small business stock

For C corporations, 26 U.S.C. § 1202 can exclude gain on the sale of qualified small business stock — a benefit large enough to change instrument choice.

The core requirements: the stock must be issued by a domestic C corporation with aggregate gross assets not exceeding the statutory threshold at and immediately after issuance; acquired at original issuance; the corporation must satisfy an active business requirement with at least 80 percent of assets used in a qualified trade or business (excluding services, finance, farming, hospitality, and several other fields); and the holder must satisfy the holding period.

Practical consequences:

  • Options do not start the clock. The holding period begins at exercise, not grant. Early exercise, or exercising well before an exit, can matter enormously.
  • Restricted stock with an 83(b) election starts the clock at issuance.
  • LLCs do not qualify unless converted to a C corporation, and conversion resets the gross asset test at conversion value.
  • Confirm the currently effective thresholds and holding periods, which have been the subject of legislative change.

A worked example

Larkfield Analytics is a Delaware C corporation founded by two people. Its equity story over five years:

Month 0. Founders purchase 8,000,000 shares of restricted stock at $0.0001 per share ($800 total), subject to four-year vesting with a one-year cliff. Both file 83(b) elections on day 12, by certified mail. Cost of the tax event: effectively zero.

Month 8. The company adopts a stock plan reserving 1,500,000 shares and obtains a 409A valuation setting common stock fair market value at $0.09.

Month 9. First four employees receive ISOs at $0.09.

Month 14. A $4 million priced round closes at $1.10 per preferred share. The board orders a new 409A valuation, which sets common at $0.34 — reflecting the preference stack. The next grants price at $0.34. Had the board kept granting at $0.09, every one of those options would be discounted and every recipient exposed to § 409A's 20 percent penalty.

Month 22. A key hire negotiates a 10-year post-termination exercise period. Counsel notes this converts her ISOs to NSOs after 3 months post-termination, and documents the trade-off in the award agreement so nobody is surprised later.

Month 30. An early engineer leaves with 60,000 vested options at $0.09 against a current 409A of $1.05. Exercising costs $5,400 and creates a $57,600 AMT adjustment. The company's extended exercise window lets him wait; he exercises in month 44 during a tender offer that also provides the cash.

Month 52. Acquisition at $6.00 per share. Founders' shares, held more than five years from original issuance in a qualifying C corporation, are analyzed for § 1202 exclusion. Employees who exercised more than a year earlier receive long-term capital gain treatment on post-exercise appreciation; those exercising at closing recognize ordinary income on the full spread.

The difference between the best and worst outcomes for individual employees is roughly a factor of two, and it traces to three decisions: file the 83(b), refresh the 409A after the round, and give people a realistic way to exercise.

A design checklist

  1. Choose the entity with equity in mind — C corporation for options and § 1202; LLC for profits interests.
  2. Adopt a board- and shareholder-approved plan before the first grant.
  3. Obtain a 409A valuation before granting, and refresh annually and after material events.
  4. Put founders on vesting, with acceleration terms defined.
  5. File 83(b) elections within 30 days, by certified mail, and track proof.
  6. Decide the post-termination exercise period deliberately, and disclose the ISO conversion consequence.
  7. Use double-trigger acceleration and define cause and good reason.
  8. Include ROFR, repurchase, drag-along, and lock-up provisions.
  9. Confirm a securities exemption for each grant and monitor the Rule 701 disclosure threshold.
  10. Approve every grant by the board, on the date stated, with complete terms.
  11. Plan for liquidity — extended windows, tender offers, or a secondary program — before employees are trapped.
  12. Explain the tax consequences in writing at grant, including the AMT for ISOs and K-1 treatment for profits interests.
  13. Keep the cap table current and fully diluted, and reconcile it before every financing.

Frequently asked questions

We forgot the 83(b) election. What now? There is no cure. The recipient will recognize ordinary income as the shares vest, at then-current value. Going forward, treat 83(b) filing as a closing condition on every restricted stock issuance.

Can we grant options in our LLC? Technically yes, but it is awkward and rarely optimal. Profits interests are the standard answer, with the K-1 consequence explained up front.

Is a 409A valuation legally required? No. What is required is that the exercise price be at least fair market value. A qualifying valuation shifts the burden of proof to the IRS, which is why every serious company obtains one.

How often must we refresh the 409A? At least every 12 months, and after any material event. A financing round is always a material event.

Should employees early exercise? Sometimes. It minimizes AMT, starts the capital gains and § 1202 clocks, and requires real cash at real risk. It is a personal decision that depends on the strike, the spread, and the person's tolerance for losing the money.

Can we extend the exercise window after grant? Usually yes by amendment, but extending an ISO beyond 3 months post-termination converts it to an NSO, and extensions can raise § 409A modification issues. Get advice before amending.

What is the difference between an RSU and restricted stock? Restricted stock is stock you own now, subject to forfeiture, eligible for an 83(b) election. An RSU is a promise to deliver stock later, with no election available and tax at settlement.

Do contractors get ISOs? No. ISOs require employee status. Contractors receive NSOs, restricted stock, or profits interests.

What happens to unvested equity in an acquisition? Whatever the plan, the award agreement, and the merger agreement say — assumption, substitution, cash-out, or cancellation. Employees should read the acceleration provision before the deal, because the merger agreement will not improve it.

Conclusion

Equity compensation converts a company's future value into present compensation, and the conversion rate depends almost entirely on paperwork completed at the beginning.

The company that files 83(b) elections on time, obtains and refreshes a 409A valuation, approves grants properly, and designs an exercise mechanism people can actually use will deliver most of the promised value to its team. The company that does none of those things will deliver a fraction of it, and will discover the shortfall at the exact moment everyone expected to be paid.

None of this is expensive to do correctly. All of it is expensive to fix.

Phantom equity and stock appreciation rights

Not every company should issue real equity. Adding shareholders means information rights, appraisal rights in some transactions, consent requirements, and a permanent obligation to communicate with people who no longer work there. For a family business, a professional services firm, or an owner who intends never to sell, synthetic equity delivers the economics without the governance.

Phantom stock is a contractual right to a cash payment equal to the value of a stated number of notional shares, payable on a defined event. Stock appreciation rights (SARs) are the same idea limited to appreciation above a baseline — the synthetic analogue of an option.

Advantages. No dilution of voting control. No new shareholders on the cap table. No securities issuance in most structures. No minority oppression claims. Simple to explain.

Disadvantages. The payment is ordinary compensation income with withholding, taxed at the participant's marginal rate rather than at capital gains rates. The company must fund it in cash, and it produces a compensation expense in the year of payment, precisely when the company is also paying transaction costs.

The § 409A trap. Phantom equity and SARs are classic deferred compensation. To avoid a violation, the plan must either fit the short-term deferral exception (paid within two and a half months after the end of the year in which the right vests) or satisfy § 409A's requirements: a fixed payment event chosen from the permitted list (separation from service, a specified date or schedule, a § 409A change in control, disability, death, or unforeseeable emergency), no acceleration, and compliance with the initial deferral election timing rules. A plan that says "payable when the board determines" or "payable on a sale of the company" without tying "sale" to the § 409A change-in-control definition is a violation waiting to be assessed against the employee.

Design points that matter:

  • Define the valuation formula precisely — a multiple of EBITDA, an appraisal process, or a formula tied to the transaction price — and state who computes it and how disputes are resolved.
  • Define the payment event using § 409A-compliant language, and address installment payments.
  • Address forfeiture on termination for cause and on voluntary resignation.
  • Consider whether the award is paid on a liquidity event only, which aligns the cash outflow with cash inflow.
  • Confirm the arrangement is a top hat plan limited to a select group of management or highly compensated employees, or risk ERISA's funding, vesting, and reporting requirements applying to what everyone assumed was a bonus plan.

Equity in a professional or family business

Two contexts deserve separate mention because the standard startup playbook actively misfires in them.

Professional services firms. Ownership may be restricted by licensing rules to licensed professionals, which forecloses granting equity to a non-licensed administrator or rainmaker. Synthetic equity, a bonus pool tied to profitability, or a separate management company are the usual workarounds. Buy-sell provisions matter more than vesting, because the predictable events are retirement, death, disability, and loss of license rather than an acquisition.

Family businesses. The real questions are succession and control, not incentive. Common structures separate economic participation from voting control — non-voting shares or units to the next generation, voting interests retained or placed in a trust. Valuation discounts for lack of control and lack of marketability drive the estate planning, and the buy-sell agreement is the operative document. Granting a key non-family executive real equity in that setting creates a minority holder inside a family governance structure, which is why phantom equity is so often the better answer.

In both settings, the instrument should follow the exit that will actually happen. Most closely held companies are never sold to a third party; they are transferred, redeemed, or wound down. Equity designed for an acquisition that never comes delivers nothing to anyone.

What employees should ask before accepting an equity offer

Candidates evaluate equity offers with almost no information, and companies rarely volunteer it. The questions that actually determine value:

  1. How many shares, and out of how many? A percentage is meaningless without the fully diluted denominator, including the unissued option pool, warrants, and outstanding convertible instruments.
  2. What type of security is it? ISOs, NSOs, restricted stock, RSUs, or profits interests carry entirely different tax outcomes.
  3. What is the exercise price, and what is the current 409A valuation? The spread is the paper gain and, for ISOs, the AMT exposure.
  4. What preferences sit above the common stock? In a company with $60 million of participating preferred, common holders receive nothing in a $50 million sale regardless of ownership percentage.
  5. What is the vesting schedule and the cliff?
  6. What is the post-termination exercise period? Ninety days on an unaffordable strike is functionally a forfeiture.
  7. Is there acceleration on a change of control, and is it single or double trigger?
  8. Are there repurchase rights on vested shares, and at what price?
  9. Has the company ever offered liquidity through a tender offer or secondary sale program?
  10. What happens on a termination for cause, and how is cause defined?

An offer that answers all ten in writing is a serious offer. One that answers none is a lottery ticket described as compensation, and it should be valued accordingly against cash.

Related articles

This article is provided for general informational purposes and does not constitute legal advice. Tax treatment depends on individual circumstances, and thresholds under §§ 409A, 1202, and 83(i) change. Consult qualified tax and corporate counsel before designing or granting equity compensation.