About this calculator

Severance Calculator is a free tool for US employees evaluating a severance offer, separation agreement, or layoff notice. It estimates federal and state supplemental withholding, FICA, COBRA cost, WARN Act applicability, OWBPA review windows, equity treatment at termination, and the Section 280G parachute flag. The calculator runs entirely in your browser; inputs are never sent to a server.

Every numeric output is traced to a primary source — an IRS publication, a state revenue or labor department publication, the WARN Act (29 U.S.C. ch. 23), or the controlling state statute. See How this works for the calculator engine details, or the Methodology page for the per-output computation walkthrough.

A note on contributor anonymity#

Contributor names are not published. Severance is a topic where employees regularly face employer retaliation; an anonymous byline lets contributors with relevant experience contribute without professional risk. The work itself stands or falls on the primary sources cited on each page.

Found an error?#

Email hello@severancecalc.net with the page URL and the disputed claim. Corrections are logged on the Changelog page with the date of the fix.

What this site is not#

This site does not provide legal, tax, or financial advice. The calculator outputs benchmarks and statutory references based on public sources. Tax law, employment law, and case law change; the site may not reflect the most recent updates. Always consult a licensed attorney, CPA, or financial advisor in your jurisdiction before signing any agreement or making a decision based on calculator output. See the Disclaimer and Terms of Service.