Does Wisconsin tax Social Security?

What the Wisconsin Department of Revenue says

We do not paraphrase the rule from memory. This is the state's own wording, copied from the page linked below it:

Federal tax is a separate question

Even though Wisconsin does not tax it, the IRS can still tax part of your Social Security on your federal return. Whether it does depends on your other income. Our taxable Social Security calculator follows the IRS worksheet line by line, and this guide explains the rule.

You can ask Social Security to withhold federal tax from each payment. Withholding for Wisconsin state tax, if you need it, is arranged with the state, not with Social Security. State rules change with new laws, so check with the Wisconsin Department of Revenue before you file.