Hey guys! 👋 I built VestingGap because every year, thousands of tech employees (at Meta, Nvidia, Google, Apple, Amazon, etc.) get hit with a brutal surprise during tax season: a $10,000–$40,000 unexpected IRS underpayment bill. Here’s why it happens: When your RSUs vest, brokers like E*TRADE or Fidelity automatically sell shares at a flat statutory 22% withholding rate. But if your base income + vesting puts you in the 32%, 35% or 37% tax bracket (plus state taxes in CA or NY), you are severely underwithheld. Existing tax tools are either hidden behind sign-up forms, full of ad-fluff or force you into expensive CPA consultations just to get a simple calculation. I built VestingGap.com to change that: ⚡️ Zero friction: No login, no email wall, no ads. 🔒 100% Private: All math runs client-side in your browser. 📊 High precision: 2026 IRS federal brackets, state marginal rates, FICA/Medicare caps. 💡 Actionable output: Shows your exact dollar gap, extra shares to sell-to-cover today and quarterly tax deadlines. I’d love to hear your feedback! What additional equity types (ISOs, NSOs, ESPP) or features would you like to see next? Thanks for checking it out! 🚀

VestingGap — RSU & Equity Tax Simulator

Calculate your true RSU tax gap & avoid IRS tax penalties

Calculate your true RSU tax gap & avoid IRS tax penalties