Pre-IPO Equity Compensation: Grants, Taxes, and Dilution

Pre-IPO equity compensation is an ownership stake in a private company offered in place of a higher cash salary, usually as stock options or restricted stock that may become valuable if the company reaches an IPO or gets acquired. Whether it turns into real money depends on the type of grant you hold, the price locked in on the day you received it, the tax choices you make inside short filing windows, and whether the company ever produces a liquidity event you can actually sell into. The decisions you make in the first 30 days after receiving a grant can move your eventual tax bill by tens of thousands of dollars.

What follows is what you need to know before you sign, before you exercise, and before you sell.

The Main Types of Grants

The category of equity you’re given controls how it’s taxed, when it’s taxed, and what you have to do to keep the favorable treatment. Four types cover almost everything you’ll see at a private company.

Incentive stock options (ISOs) give you the right to buy company shares at a locked-in price. They’re available only to employees and carry potential tax advantages, but they come with strict federal requirements around holding periods and exercise windows.¹

Non-qualified stock options (NSOs) also give you the right to buy shares at a set price, but without the ISO tax treatment. In exchange, companies can grant NSOs to consultants, advisors, and board members, not just employees.

Restricted stock units (RSUs) are a promise to deliver shares at a future date once vesting conditions are met. You pay nothing to receive the shares. Private companies often use a double trigger, meaning RSUs won’t settle until both a time-based schedule and a liquidity event like an IPO have occurred.

Restricted stock awards (RSAs) grant you actual shares on the day of the award rather than the right to buy them later. They’re most common for founders and very early employees, when the share price is still close to zero.

How Your Strike Price Gets Set

If you receive stock options, the price you’ll pay to buy shares is called the strike price. Federal law requires private companies to obtain an independent appraisal, known as a 409A valuation, to establish the fair market value of their common stock. Your strike price must be at or above that appraised value. If a company sets the strike price below fair market value, the employee faces a 20% additional tax on the deferred compensation plus interest charges calculated at the federal underpayment rate plus one percentage point.²

A 409A valuation has to be refreshed at least every 12 months, or sooner if the company hits a material event like a new funding round. From your perspective, the number matters because a low 409A at your grant date means a low strike price and more room between what you paid and what the shares might eventually sell for. That’s why the earliest employees at successful startups often see the largest gains: their strike prices were set when the company was worth very little.

Vesting, Cliffs, and Leaving the Company

Almost every grant comes with a vesting schedule that requires you to stay for a set period before you own what you were granted. The standard is four years with a one-year cliff: nothing vests for 12 months, then 25% vests at once on your first anniversary, and the rest vests in equal monthly or quarterly installments over the next three years.

Some grants use performance triggers instead of or alongside time. A sales leader’s equity might be tied to a revenue target; a technical founder’s shares might vest on a product launch or regulatory approval. Private-company RSUs frequently pair a normal time-based schedule with a required liquidity event before shares are actually delivered.

Acceleration in an Acquisition

Acquisition scenarios are where vesting gets interesting. Single-trigger acceleration means all your unvested shares vest immediately when the company is acquired, regardless of what happens to your job. Double-trigger acceleration requires both the acquisition and a qualifying termination, such as being laid off within a certain window after the deal closes. Double-trigger is more common because acquirers generally want to retain the team they’re buying.

What Happens When You Leave

Unvested shares are forfeited back to the company’s equity pool when you depart. For vested options, you typically have 90 days after your last day to decide whether to exercise. That 90-day window matters especially for ISOs: if you don’t exercise within three months of leaving, your ISOs automatically lose their favorable tax status and convert to NSOs.¹ Some companies have extended their post-termination exercise windows to as long as 10 years, but the extended window itself triggers the ISO-to-NSO conversion after the 90-day mark. Options you don’t exercise before their deadline expire permanently.

Options also have a maximum lifespan. ISOs by law cannot be exercisable more than 10 years from the grant date.¹ If a company stays private for a long time, early employees can find themselves facing option expiration while still unable to sell.

Early Exercise and the 83(b) Election

Some companies let you exercise options before they vest. You pay the strike price and receive actual shares, but those shares stay subject to the same vesting schedule. If you leave before vesting completes, the company buys back the unvested shares at your original purchase price.

The reason to early exercise comes down to taxes. When you exercise options on shares that haven’t vested, you can file a Section 83(b) election with the IRS within 30 days of receiving the shares.³ The election tells the IRS you want to be taxed on the value of the shares now, at the grant date, rather than at each vesting date when the price may be much higher. At an early-stage startup, the spread between strike price and fair market value might be near zero, so the immediate tax hit is small or nothing. Without the 83(b), you’d owe taxes on the full appreciation at each vesting event, often at ordinary income rates.

The 30-day deadline is absolute. It cannot be extended, and there is no way to fix a missed election after the fact. Filing on time also starts the clock on long-term capital gains treatment earlier, which matters if you plan to hold for years.

Ways to Exercise Your Options

Exercising means buying your shares at the strike price. You usually have a few methods available.

Cash exercise. You pay the strike price out of pocket and keep all the shares. This preserves maximum ownership but requires having the cash on hand, plus something set aside for the tax bill.

Net exercise. The company withholds a portion of your shares to cover the strike price instead of asking for cash. You pay nothing upfront but end up with fewer shares. The withheld shares get valued at the company’s most recent 409A, which is often conservative compared to what the shares might fetch on a secondary market or at IPO, so you’re effectively selling them at the lowest defensible price. For NSOs, companies typically also withhold shares to cover income tax on the spread. For ISOs, companies usually don’t withhold for taxes at exercise, which can leave you with an out-of-pocket AMT bill.

Cashless exercise. Mostly available at or after an IPO, this means selling enough shares immediately to cover the strike price and tax withholding, keeping the rest.

How Pre-IPO Equity Gets Taxed

Taxes are where this gets genuinely complicated, and the grant type controls both timing and rate.

Incentive Stock Options

ISOs get preferential treatment: no regular income tax when you exercise. But the spread between your strike price and the fair market value at exercise counts as an adjustment for the Alternative Minimum Tax, a parallel calculation designed to make sure people benefiting from certain tax preferences still pay a minimum amount. For 2026, the AMT exemption is $90,100 for single filers and $140,200 for married couples filing jointly, with phase-outs beginning at $500,000 and $1,000,000 respectively.⁴ If your ISO exercise spread pushes you above the exemption, you’ll owe AMT, reported on Form 6251.⁵

AMT paid because of ISO exercises isn’t gone forever. You can recover it in future years through the minimum tax credit on Form 8801, which provides a dollar-for-dollar credit against your regular tax liability in years when you don’t owe AMT.⁶ The credit carries forward indefinitely, though recovery can take years.

To qualify for long-term capital gains rates when you eventually sell ISO shares, you must hold them at least two years from the grant date and one year from the exercise date.¹ Selling before meeting both holding periods is a disqualifying disposition, and the spread at exercise gets taxed as ordinary income.⁷ For 2026, long-term capital gains rates are 0%, 15%, or 20% depending on income; ordinary rates can reach 37%.

The $100,000 ISO Annual Limit

There’s a cap that catches many employees off guard. ISOs are only treated as ISOs to the extent that the aggregate fair market value of shares becoming exercisable for the first time in any calendar year doesn’t exceed $100,000, measured at the grant date. Anything above that threshold is automatically treated as NSOs for tax purposes, so ordinary income tax applies to the spread at exercise.⁸ If you have a large ISO grant, check whether your vesting schedule pushes you over this limit in any year.

Non-Qualified Stock Options

NSOs are simpler but less favorable. The spread between fair market value and your strike price is taxed as ordinary income the moment you exercise, whether or not you sell. Exercise 1,000 shares at a $1 strike when the fair market value is $10, and you owe income tax on $9,000 of compensation. Your employer withholds federal income tax, Social Security, and Medicare on that amount and reports it on your W-2.¹ Any additional gain after exercise is a capital gain or loss when you sell.

RSUs and RSAs

RSUs are taxed as ordinary income when they vest and shares are delivered. The full fair market value on the delivery date counts as compensation. Public-company employers typically withhold shares to cover taxes. At private companies with double-trigger RSUs, the tax event is deferred until both the time-based vesting and the liquidity event have happened, which is the whole point of that structure: you shouldn’t owe taxes on shares you can’t sell.

RSA recipients can file the same 83(b) election. Paying tax on the shares’ value at grant, while the price is low, converts future appreciation into capital gains rather than ordinary income. The 30-day filing deadline applies here too.³

The QSBS Exclusion

This is the single most valuable and most overlooked tax benefit available to pre-IPO employees. Under Section 1202 of the Internal Revenue Code, if you hold qualified small business stock for the required period, you can exclude a substantial portion of your capital gains from federal tax entirely.⁹

Several conditions have to be met:

The company must be organized as a C corporation (not an LLC or S corp) at the time the stock is issued.
The corporation’s aggregate gross assets must not exceed $75 million at the time the stock is issued. That threshold was recently increased from $50 million by legislation enacted in 2025.⁹
You must acquire the stock at original issue, which includes stock received as compensation for services. Exercising stock options counts.
You must hold the stock for at least five years for a full exclusion on stock acquired before the 2025 law’s effective date, or at least three years under the new graduated schedule for stock acquired afterward.

For stock acquired before the 2025 changes, the exclusion is 100% of gain up to the greater of $10 million or 10 times your adjusted basis. For stock acquired after the effective date, the exclusion follows a graduated schedule: 50% at three years, 75% at four years, and 100% at five or more years, with a per-issuer limit of $15 million.⁹

The practical impact is large. An early employee who exercised options at a $0.10 strike price and later sells for $5 million in gains could owe zero federal capital gains tax if QSBS requirements are met. That’s a big part of why early exercise combined with an 83(b) election gets recommended so often at startups: it starts the QSBS holding clock as early as possible and locks in the lowest basis. Not every startup qualifies, but if yours is a C corp under the gross assets limit, this benefit alone can justify the risk of early exercise.

Dilution and What Your Grant Actually Represents

Your share count doesn’t change when the company raises a new funding round, but your percentage of the company does. Each time new shares are issued to investors, the total goes up and every existing shareholder’s slice shrinks.

Say you own 10,000 shares out of 1 million, so 1% of the company. The company raises a Series B by issuing 250,000 new shares. Total shares jump to 1.25 million, and your 10,000 now represent 0.8%. Your percentage dropped by 20% even though the company’s overall value likely rose. When the post-money valuation increases enough, your shares are worth more in dollars despite the lower percentage. That’s the math that makes dilution acceptable in a growing company, but it doesn’t always work out that way.

Most startups reserve 10% to 20% of their equity for an option pool, and expanding that pool dilutes existing shareholders again. By the time a company reaches Series C or D, an early grant that looked like 1% ownership might represent 0.3% or less. Ask how many fully diluted shares are outstanding, not just how many shares you’re being granted. The grant only means something relative to the total.

Turning Shares Into Cash

The hardest part of pre-IPO equity is that it can be worth a lot on paper while being impossible to spend.

Selling Before an IPO

Secondary market platforms allow employees to sell private shares to accredited investors, though these transactions almost always require company approval.¹⁰ Most private companies include a right of first refusal in their equity agreements, giving the company the option to buy your shares at the offered price before you can sell to an outside buyer. Some companies block secondary sales outright. Even when a sale is approved, expect legal review and transfer agent paperwork.

After the IPO

Going public doesn’t mean instant liquidity. Companies and their underwriters typically require insiders and employees to sign lock-up agreements preventing share sales for 180 days after the IPO.¹¹ These agreements are contractual rather than legally mandated, and specific terms vary by deal. Some lock-ups include early release provisions if the stock trades above a certain price for a sustained period.

If you hold double-trigger RSUs, the IPO satisfies the liquidity trigger and your vested RSUs settle into actual shares. The tax bill hits at that point, based on the share price when the RSUs settle. If the stock drops during the lock-up, you could owe taxes based on a higher settlement price than you can eventually sell for. That mismatch is one of the more frustrating aspects of post-IPO equity.

Once the lock-up expires, SEC Rule 144 governs sales of restricted and insider-held securities. For reporting companies, you must hold shares at least six months before selling. Affiliates such as officers, directors, and large shareholders face additional volume limits: no more than 1% of outstanding shares or the average weekly trading volume over the prior four weeks, whichever is greater, in any three-month period.¹²

Where People Lose Money

Pre-IPO equity isn’t a guaranteed payout. The downside cases matter as much as the upside.

The Company Fails or Stays Private Forever

If the company shuts down, your shares are worthless. If you exercised options and paid cash for those shares, that cash is gone. You can claim a capital loss equal to what you paid to exercise, which offsets capital gains from other investments and up to $3,000 of ordinary income per year. If you paid AMT on the exercise, you can recover that through the minimum tax credit on Form 8801 in future years, though the recovery can take a decade or more depending on your tax situation.⁶

Concentration Risk

If most of your net worth is tied up in a single private company, a bad outcome doesn’t just cost you equity gains, it can wipe out your finances. Your salary already depends on the same company, so loading up on its stock doubles the same bet. Financial advisors generally recommend keeping no more than 10% to 15% of your total portfolio in any single company’s equity. That’s easier said than done when shares are illiquid and the paper value keeps climbing, but diversification is worth thinking about as soon as you have the ability to sell.

Exercising at the Wrong Time

The most common expensive mistake is exercising a large ISO grant in a single year without running the AMT calculation first. Someone who exercises $500,000 of ISO spread in one year can face a six-figure AMT bill on shares they can’t sell. Spreading exercises across multiple tax years keeps AMT manageable. Waiting too long has its own risk: options expire 10 years from the grant date, and if the company is still private at that point, you either exercise into an illiquid investment or lose the options.¹

Pre-IPO equity can be life-changing wealth or an expensive lesson, and the difference usually comes down to understanding the mechanics before you have to make decisions under deadline pressure. Run the tax numbers before you exercise, file the 83(b) on time if you early exercise, and don’t assume shares will be worth more tomorrow just because the last 409A went up.

1
Office of the Law Revision Counsel. 26 USC 422 Incentive Stock Options
2
Office of the Law Revision Counsel. 26 USC 409A Inclusion in Gross Income of Deferred Compensation Under Nonqualified Deferred Compensation Plans
3
Internal Revenue Service. Form 15620 – Section 83(b) Election
4
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
5
Internal Revenue Service. About Form 6251, Alternative Minimum Tax – Individuals
6
Internal Revenue Service. About Form 8801, Credit for Prior Year Minimum Tax – Individuals, Estates, and Trusts
7
Internal Revenue Service. Topic No. 427, Stock Options
8
eCFR. 26 CFR 1.422-4 – $100,000 Limitation for Incentive Stock Options
9
Office of the Law Revision Counsel. 26 USC 1202 Partial Exclusion for Gain From Certain Small Business Stock
10
U.S. Securities and Exchange Commission. Accredited Investors
11
Investor.gov. Initial Public Offerings Lockup Agreements
12
U.S. Securities and Exchange Commission. Rule 144 Selling Restricted and Control Securities