# Vestgap

> The gap at vest.
> A planning desk for high earners whose RSUs and bonuses are withheld at the IRS supplemental 22% rate. Not tax, legal, or accounting advice. A CPA signs the return.

Canonical: https://vestgap.com

Vestgap computes the federal (and simplified state) gap between 22% supplemental withholding and 2026 marginal brackets, then copies a 1040-ES or W-4 Step 4(c) slip. Numbers are deterministic TypeScript in the browser.

Reviewed: 2026-08-21. Tax year: 2026. Next federal estimated-tax installment after 2026-08-21: 2026-09-15.

## Primary

- [Desk](https://vestgap.com/): Enter W-2, RSU vests, bonus. Copy a 1040-ES slip or W-4 extra. Optional $49 CPA letter.
- [About](https://vestgap.com/about): What we are, what we are not, who computes the numbers.
- [Method](https://vestgap.com/guides/method): Included, excluded, and IRS sources.
- Full answers: https://vestgap.com/llms-full.txt