About 1099Quarterly

1099Quarterly is a set of calculators for 2026 federal tax on 1099 and self-employment income. The figures come from a dated file: brackets, the standard deduction, the Social Security wage base, and the Form 1040-ES due dates. The file's sources are listed below. A number that is not in that file is not on the site.

What you type stays in the browser. The page does not send a profit, a wage, or a name to a server. There is no account. The result in the HTML is the same function the live form runs.

This is not a CPA firm, an enrolled-agent practice, or the IRS. No reviewer is named because none has signed the pages. The worked example and the tests are on the methodology page.