Equity compensation, demystified
Equity compensation can be worth more than your salary — and it's also where the most expensive mistakes happen. Here's every major form of equity pay in plain English: what it is, when it vests, and exactly how the IRS taxes it.
The Financial Angel does this for you: it reads your grant documents, tracks vesting and deadlines, models the tax on exercising or selling, and hands the return to a licensed CPA to finalize.
Options that let you buy company shares at a fixed strike price, granted only to employees. No regular income tax at exercise, and the whole gain can qualify for long-term capital gains if you meet the holding periods.
Good fit if — you're an employee who can hold shares long enough to earn the favorable tax treatment (watch the AMT).
Options to buy shares at a set strike price that can be granted to anyone — employees, contractors, advisors, or directors. The spread at exercise is taxed as ordinary income.
Why it matters — simpler rules than ISOs, but no AMT-favored treatment; tax is due the moment you exercise.
A promise to give you actual shares on a future date once you vest. You pay nothing to receive them; their full value is ordinary income at vesting.
Why it matters — the most common equity at large public companies; there's no strike price and no way for them to end up "underwater."
Actual shares granted up front, but subject to vesting and forfeiture if you leave early. Common for founders and very early employees, often at a tiny purchase price.
Good fit if — you're joining at the earliest stage and can file an 83(b) election to lock in a low tax basis.
A payroll program that lets you buy company stock at a discount (often 15%), frequently with a "lookback" that prices off the lower of two dates. A qualified ESPP can offer favorable tax treatment.
Good fit if — you want a lower-risk way to build equity; the built-in discount is close to a guaranteed return if you sell promptly.
The timeline over which your equity becomes actually yours. The classic grant vests over four years, with equal monthly or quarterly installments after the first year.
Why it matters — you forfeit anything unvested if you leave, so your equity's real value depends on how much has vested.
A waiting period — usually one year — before any equity vests at all. Leave before the cliff and you walk away with nothing; hit it and a full year's worth vests at once.
Why it matters — timing a departure just before or after a cliff can mean losing (or keeping) a big chunk of equity.
Private-company RSUs that vest only when two things happen: you meet the time-based schedule and the company has a liquidity event (IPO or acquisition).
Why it matters — it stops you from owing tax on shares you can't yet sell, by delaying the tax event until the stock is liquid.
An election to be taxed on restricted stock or an early-exercised option at grant — when the value is low — rather than as it vests. Must be filed with the IRS within 30 days, with no extensions.
Good fit if — you receive an RSA or early-exercise options in a startup you expect to grow quickly.
RSUs are ordinary income at vesting, valued at that day's share price and added to your W-2. Employers usually withhold shares to cover it — but the default 22% supplemental rate often under-withholds for high earners.
Why it matters — a big vesting year can leave a surprise tax bill in April; plan estimated payments. See our tax & asset-protection guide.
When you exercise an NSO, the spread between the strike price and fair market value is ordinary income, subject to payroll taxes. Later gains or losses from that point are capital.
Why it matters — exercising creates a taxable event even if you don't sell a single share.
Hold ISO shares more than two years from grant and one year from exercise, and the entire gain is long-term capital gain. Sell sooner (a "disqualifying disposition") and part becomes ordinary income.
Good fit if — you can afford to hold and want the lowest possible tax rate on the gain.
Exercising ISOs and holding creates no regular income tax, but the bargain element counts toward the alternative minimum tax. In a private company you can owe cash AMT on paper gains you can't sell.
Why it matters — the single most common equity-comp mistake; model the AMT before exercising a large ISO position.
Shares held one year or less are taxed at ordinary short-term rates; held longer than a year, they qualify for lower long-term capital gains rates. The clock starts at exercise (or vesting for RSUs).
Why it matters — a small change in your sell date can shift the entire gain into a lower bracket.
Shares in a qualifying C-corporation held more than five years may exclude a large portion of the gain from federal tax under Section 1202. Strict rules apply to the company and the stock.
Good fit if — you hold founder or early-employee stock in an eligible startup; see entity structuring.
You can exercise options and hold the shares for long-term capital gains, or exercise and immediately sell ("cashless exercise") to lock in cash and avoid tying up money. Holding chases a lower tax rate but adds risk.
Why it matters — holding a concentrated, illiquid position for tax savings can backfire if the stock falls.
Some plans let you exercise options before they vest. Paired with an 83(b) election, this can start the capital-gains clock early and minimize tax — at the cost of buying shares that may never be worth anything.
Good fit if — the strike price is low, you believe in the company, and you can afford to lose what you put in.
When a large share of your net worth sits in one employer's stock, your income and your savings ride on the same company. Diversifying trades some upside for a lot less single-stock risk.
How the Angel helps — it flags over-concentration and models a tax-aware plan to trim it; fold the proceeds into your wealth plan.
A 10b5-1 plan is a pre-set, automatic schedule to sell company stock that protects insiders from insider-trading concerns and removes emotion from selling. A useful tool for steadily diversifying.
Good fit if — you're an executive or insider who wants a disciplined, defensible way to sell over time.
An independent appraisal that sets the fair market value — and therefore the option strike price — of a private company's stock. Refreshed at least annually or after major events.
Why it matters — a lower 409A means a lower strike price on your options, and it anchors your AMT math when you exercise.
A company-organized event that lets employees sell some vested shares back to the company or to investors at a set price — often the only sanctioned way to get cash out before an IPO.
Good fit if — you want partial liquidity and diversification without waiting for an exit.
Selling private shares to an outside buyer on a secondary market. Many plans require company approval or grant a right of first refusal, and pricing can be steeply discounted.
Why it matters — check your equity agreement's transfer restrictions before counting on a secondary sale.
Companies reserve a slice of shares — the option pool — to grant to employees and advisors. Sizing the pool, setting vesting, and choosing ISOs vs. NSOs shapes both hiring and dilution.
How the Angel helps — it drafts grant terms and models dilution, then routes the paperwork to counsel; see the business guide.
The capitalization table records who owns what — founders, investors, and the option pool — and how ownership shifts as you raise and grant equity. Accuracy here is essential at every financing.
Why it matters — a messy cap table can stall a fundraise or acquisition; keep it clean from day one.
Issuers must obtain a defensible 409A valuation before granting options so strike prices meet fair market value. Skipping or lowballing it exposes the company and employees to penalties.
How the Angel helps — it tracks when a refresh is due and coordinates the appraisal; pair it with your entity structure.
That's the point of the Angel. Share your grant documents — it tracks your vesting and deadlines, models the tax of exercising or selling, and connects you to a licensed CPA to finalize.
Start your profileThese are plain-language definitions for education, not legal, tax, or investment advice. Equity-compensation rules and tax treatment vary by state and change over time — the Financial Angel drafts and recommends; a licensed CPA or attorney reviews and executes.