About EnrollMath
EnrollMath is an independent project owned and run by Matt, a person, not a company or news organization. It is a free, no-signup tool site: Pick the health plan that actually costs less.
Purpose
I built EnrollMath to help people work out which health plan costs less during open enrollment with real numbers instead of guesses. The calculators run in your browser, show their formulas, and let you change every assumption. The guides explain the numbers behind the tools in plain language.
Data sources
HSA and HDHP limits come from IRS Revenue Procedures and Notices, the affordability percentage and premium tax credit tables from IRS Revenue Procedures, and the federal poverty guidelines from HHS. COBRA and marketplace rules follow Healthcare.gov and Department of Labor guidance. Each guide cites its source and year. Your plan premiums, deductibles and usage are your own inputs.
How we keep it accurate
The math is covered by automated tests with hand-computed answers, figures show their source and update date where possible, and the site was last updated October 14, 2026. If you spot an error, please tell me and I will fix it.
Disclaimers
General education only. Not insurance, tax or legal advice. No insurer or broker is affiliated with this site. See the terms of use and privacy policy.
Contact and feedback
Email matt63sorensen@yahoo.com, use the Feedback button on any page, or open an issue on GitHub. More on the contact page.