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Exercise up to the point where AMT kicks in, early in the year, then stop and repeat. The whole strategy is choosing how much spread to recognize, when to hold, and when to sell, on purpose.
One form your employer mails you, one form where the AMT shows up, and one form where the sale gets reported three different ways. Get them aligned and the ISO surprise loses its power.
The spread lands in your wages on the W-2, the sale shows up separately on the 1099-B, and the basis is the link between them. Read them as one story, fix the basis on Form 8949, and you pay tax once instead of twice.
With a real discount and a quick sale, an ESPP is often the highest-return benefit you have. This is the whole playbook: whether to max it, how to fund it, when to sell, and the rare case for holding.
The form your employer sends, the forms you file, and the one adjustment that keeps you from paying tax on your discount twice. A full walkthrough with a worked example and a pre-sale checklist.