VestingGap — RSU & Equity Tax Simulator
Calculate your true RSU tax gap & avoid IRS tax penalties
What is VestingGap — RSU & Equity Tax Simulator?
When Big Tech RSUs vest, brokerages withhold a flat 22% tax. But for engineers earning $200k–$500k+, marginal tax brackets reach 32%–37%+ state taxes, creating massive surprise tax bills at tax time. VestingGap is a zero-login, 100% browser-based calculator built for tech workers. In 15 seconds, see your true marginal tax liability, exact underpayment risk, additional shares to sell-to-cover and estimated quarterly IRS payment schedules. No signup, no ads, 2026 tax bracket accuracy.
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