Obligare / States / Wisconsin / Wisconsin personal income tax return with business income
Wisconsin

Wisconsin personal income tax return with business income

Report the business income on the owner's Wisconsin personal return by April 15 each year.

When
By April 15 each year.
Agency
Wisconsin Department of Revenue
Applies to
Sole proprietorships and single member LLCs formed in Wisconsin, with US owners.
Source
www.revenue.wi.gov, read October 22, 2026
J
Jay explains

A sole proprietorship or single member LLC reports its income on the owner's Wisconsin personal return, due April 15 each year in step with the federal Form 1040.

Next dates

For a calendar year company. Shown as the agency states them; if a date falls on a weekend, file before it.

Also in Wisconsin

Wisconsin annual reportWisconsin annual reportWisconsin annual reportWisconsin nonprofit annual reportWisconsin charitable organization credential renewalWisconsin charitable organization annual financial reportWisconsin corporate income tax returnWisconsin corporate estimated tax paymentWisconsin pass through entity returnWisconsin unemployment insurance wage reportWisconsin annual withholding reconciliationWisconsin sales tax return

See it on your company's calendar

Your company's compliance calendar

Three answers to start. Refine it after.

An LLC's tax treatment decides which federal return it files. Choose the line that matches yours. Nonprofits are covered too.
Count everyone on payroll. An S corporation's working owners are employees: they are paid a salary.
A company based outside its state of formation is registered in both and files in both.
More about the company: other states, payroll, dates, abroad
Other states where you have employees or an office
Other states where you have employees or an office
Each one adds that state's registration, employer and tax filings. A state where you only keep inventory or make sales belongs under sales tax states below, not here.
Date registered in each other state
Optional. Some states key their report to the day you registered there rather than your date of formation; without it, the formation date stands in and the calendar says so.
States where you collect sales tax
States where you collect sales tax
Wisconsin keys its report to this date. Add it and the calendar places it.
Some taxes start at a revenue threshold.
Outside the United States
Each adds the FinCEN or IRS form that comes with it: the FBAR, Form 5472, Form 5471, Forms 1042 and 1042-S.

No account needed. Nothing is stored until you save it.

Put it in your calendar

The calendar is free to read and to print. A subscription keeps it alive.

$190 a year ($15.83 a month), or $19 month to month
Put it in my calendar

Advisors: $49 a month for up to ten companies, $4 each after. Details