Write for freelancers, run a coworking space, or advise self-employed clients? Paste one of these into any page and your readers get a working 2026 tax calculator, free. No account, no fee, and nothing your readers type ever leaves their browser.
How it works
Copy the code for the calculator you want below.
Paste it into your page as HTML: a Custom HTML block in WordPress, an Embed block in Squarespace or Webflow, or straight into your template.
That’s it. The calculator sizes itself to fit. It updates for each tax year on its own, so you never have to touch it again.
Want it in the light theme? Add ?theme=light to the address in the code, after the calculator’s name. The line under the frame credits BrassWell with a link to the full calculator; please keep it.
1099 tax calculator
The 2026 tax on 1099 income, federal and state, and what you keep. See it on its own page.
Quarterly estimated tax calculator
What to pay the IRS by each 2026 due date, with the safe harbor. See it on its own page.
It runs the calculation in your reader’s browser. It sets no cookies, loads no analytics or ads, and sends nothing anywhere: there is no form to submit. The optional resize script only reads the calculator’s height and sets it on the frame. If you’d rather not load any script from us, leave out the last line and the frame keeps a fixed height.
The calculators give planning estimates, not tax advice, on the 2026 federal tables from IRS Rev. Proc. 2025-32 and the Social Security Administration. Free to embed on any site that keeps the credit line. Don’t frame them in a way that suggests BrassWell endorses your product.
