Research notes
Guides
Plain-English tax guides for U.S. stock compensation topics, with official sources and calculator links.
Guide
RSU Tax Guide for 2026
How RSUs are taxed at vest, what supplemental withholding means, and how capital gains can arise later.
Guide
NSO Tax Guide for 2026
How nonstatutory stock options are generally taxed at exercise, what Form W-2 reporting can mean, and how a later sale is separate.
Guide
ISO AMT Guide for 2026
How incentive stock option exercises can create an AMT preference item and what to estimate before exercising.
Guide
ESPP Tax Guide for 2026
How employee stock purchase plan shares can create ordinary income and capital gain or loss when sold.
Guide
Stock Compensation Capital Gains Guide for 2026
How holding period, basis, sale proceeds, and prior wage income interact when stock compensation shares are sold.
Guide
83(b) Election Guide
What a Section 83(b) election is, why the 30-day deadline matters, and what this site does not decide for you.