Wisconsin Business Taxes: Agencies, Accounts, and Deadlines

Wisconsin Business Tax Agencies and Accounts

Running a business in Wisconsin means working with three primary tax agencies across the state and federal levels. Before registering with state tax agencies, businesses with employees or entity filings apply for a Federal Employer Identification Number (EIN) with the Internal Revenue Service (IRS) and register their legal entity structure with the Wisconsin Department of Financial Institutions (DFI).

The Wisconsin Department of Revenue (DOR) administers state business income and franchise taxes, sales and use taxes, employer and pass-through withholding taxes, state excise taxes, and manufacturing property assessments. Most new businesses register with the DOR online or by using Form BTR-101 (Business Tax Registration), which covers sales and use tax, employer withholding, local exposition district tax, premier resort area tax, rental vehicle fees, police and fire protection fees, and dry cleaning fees. Once registered, you file returns and make payments through the DOR online portal, My Tax Account (MTA).

The Wisconsin Department of Workforce Development (DWD) manages Unemployment Insurance (UI) and Worker's Compensation. Within the DWD, the UI Bureau of Tax and Accounting establishes employer UI tax liability, maintains employer tax accounts, and collects quarterly unemployment tax payments through the DWD Employer Online Services portal.

• revenue.wi.gov: DOR Businesses Skip to main content Wisconsin.Gov Agency Directory Online Services State o
• dwd.wisconsin.gov: Employer Unemployment Resources

Wisconsin Sales and Use Tax Rules and Deadlines

Every individual, partnership, corporation, or organization making taxable retail sales, licenses, leases, or rentals of taxable products or services in Wisconsin must obtain a Seller's Permit from the DOR. If your business regularly buys items without paying sales tax to the seller, you must apply for a Consumer's Use Tax Certificate.

Out-of-state businesses without a physical presence in Wisconsin (remote sellers) must also collect and remit Wisconsin sales or use tax unless they qualify for the small seller exception. According to DOR Sales and Use Tax guidance enacted as of March 11, 2026, the small seller exception exempts remote sellers whose gross sales into Wisconsin are $100,000 or less in both the previous and current calendar years. Sellers with any physical presence in Wisconsin do not qualify.

Since January 1, 2020, marketplace providers must collect and remit Wisconsin sales or use tax on all taxable sales they facilitate on behalf of marketplace sellers, unless granted a waiver under sec. 77.52(3m)(b) or (c), Wis. Stats. If all of your taxable Wisconsin sales are facilitated through a registered marketplace provider, you do not need a seller's permit. If you make direct taxable sales outside the marketplace, you must register and collect tax on those direct sales.

When you hold a Seller's Permit, Use Tax Certificate, or Consumer's Use Tax Certificate, the DOR assigns you a monthly, quarterly, or annual reporting period (verifiable via the DOR Wisconsin Tax Account Number and Filing Frequency Lookup tool). You must file a return for every assigned reporting period, even when you owe zero tax. You file electronically through My Tax Account or by phone using Telefile at (608) 261-5340 or (414) 227-3895.

Standard sales tax returns are due on the last day of the month following the end of your reporting period. Early monthly sales tax filers must file by the 20th of the month following the reporting period (for example, a February return is due March 20 instead of March 31). Weekend or legal holiday due dates move to the next business day. Returns filed via My Tax Account or Telefile, along with ACH Debit payments, must be received by 4:00 p.m. CST on the due date.

You can request a one-month filing extension in My Tax Account, by emailing WIsalestax@wisconsin.gov, or by writing to the DOR Tax Operations Business unit in Madison. An approved extension preserves your eligibility for the retailer's discount if paid before the extension expires, though unpaid tax accrues interest at 1% per month during the extension period and 1.5% per month afterward.

• revenue.wi.gov: DOR Sales and Use Tax
• IRS: Business taxes

Wisconsin Unemployment Insurance (UI) and Withholding Taxes

Employers register with the DOR via Form BTR-101 to withhold state income tax from employee wages, and also manage specialized DOR withholding if paying nonresident entertainers or distributing income to nonresident owners of a pass-through entity.

With the DWD, employers register under Chapter 108 of the Wisconsin Statutes (detailed in the DWD Employer Handbook, Publication UCB-201-P) to report quarterly wages and pay Unemployment Insurance taxes. According to the DWD 2027 Tax Rate Schedule, the Wisconsin UI taxable wage base is the first $14,000 in wages paid to each employee in a calendar year. Wages paid above $14,000 must still be reported on your quarterly wage report, even though those excess wages are not taxed. Employers with a 0.00% tax rate must still file quarterly contribution and wage reports. On the DWD portal, the next quarterly report and wage report filing due date is February 1, 2027.

For 2026 and 2027, new employers outside the construction industry pay 3.05% on payrolls under $500,000 (2.50% basic plus 0.55% solvency) and 3.25% on payrolls of $500,000 or more (2.50% basic plus 0.75% solvency). New construction employers pay 2.50% on payrolls under $500,000 and 2.70% on payrolls of $500,000 or more. Under Wis. Stat. § 108.18, Schedule D is in effect for 2027 for experienced employers. Experienced rates under Schedule D range from 0.00% (under $500,000 payroll with a 15% or more reserve) or 0.05% ($500,000 or more payroll with a 15%+ reserve) up to 12.00% (10.70% basic plus 1.30% solvency) for accounts overdrawn by 9% or more.

By our calculation from the DWD 2027 Schedule D table, a new non-construction employer with a payroll under $500,000 owes a maximum of $427.00 in state UI tax per employee per year ($14,000 wage base multiplied by 3.05%), while a new construction employer under $500,000 owes up to $350.00 per employee ($14,000 multiplied by 2.50%). An experienced employer at the highest overdrawn tier (12.00%) owes up to $1,680.00 per employee.

To lower their experience rate for the upcoming year, employers can make voluntary contributions using the online DWD Voluntary Contribution Calculator from mid-October through November. Account changes are reported online or on Form UCT-6491-E.

• dwd.wisconsin.gov: 2027 Tax Rate Schedule for Employers
• dwd.wisconsin.gov: Employer Unemployment Resources

Wisconsin Income, Franchise, Excise, and Local Taxes

Corporations and partnerships file annual state income or franchise tax returns with the DOR and can verify quarterly estimated payments using the DOR Estimated Tax Lookup tool. The DOR also administers the community development entity investment credit, the qualified Wisconsin business capital gain exclusion and deferral program, and qualified opportunity zones.

Depending on your location and industry, your business may also owe specialized state and local taxes managed through My Tax Account:

• Local District Sales Taxes: Premier resort area taxes and local exposition district taxes apply in designated municipalities and districts.
• State Excise Taxes: Separate registration and reporting apply to alcohol beverages (liquor and beer), cigarette, tobacco, and vapor products, motor fuel, and the Electric Vehicle Charging Tax.
• Specialized Fees: The DOR collects dry cleaning fees, the 911 fee (police and fire protection fee), state rental vehicle and limousine fees, and real estate transfer fees (via the Real Estate Transfer Return module in My Tax Account).
• Manufacturing Property Assessment: Manufacturing property is assessed directly by the DOR using Manufacturing M-Forms.

• revenue.wi.gov: DOR Businesses Skip to main content Wisconsin.Gov Agency Directory Online Services State o
• revenue.wi.gov: DOR Sales and Use Tax

Federal Business and Self-Employed Taxes (IRS)

For the 2026 tax year, IRS guidance divides federal business taxes into five general categories: income tax, estimated taxes, self-employment tax, employment taxes, and excise tax. All businesses except partnerships must file an annual federal income tax return, while partnerships file an information return. Because federal income tax is a pay-as-you-go system, you must make regular estimated tax payments if you do not pay enough through withholding.

Sole proprietors, independent contractors, and partners must pay federal self-employment (SE) tax for Social Security and Medicare and file Schedule SE (Form 1040 or 1040-SR) if net earnings from self-employment are $400 or more, or if they receive $108.28 or more in wages from an exempt church or qualified church-controlled organization.

Employers must withhold and pay federal employment taxes (Social Security and Medicare, federal income tax withholding, and FUTA tax) using Forms W-4, 941, and W-2. For federal excise taxes, businesses use Form 720 (environmental, communications, air transportation, fuel, retail heavy trucks/trailers, and manufacturers taxes), Form 2290 (highway trucks, truck tractors, or buses with a taxable gross weight of 55,000 pounds or more), and Form 11-C and Form 730 (wagering).

• IRS: Business taxes
• dwd.wisconsin.gov: 2027 Tax Rate Schedule for Employers

Wisconsin Small Business Tax Compliance Checklist

Use this step-by-step plan written by our team to set up your Wisconsin tax accounts and stay ahead of state and federal filing rules.

• Step 1: Obtain your federal EIN from the IRS and register your legal entity with the Wisconsin Department of Financial Institutions (DFI).
• Step 2: Submit Form BTR-101 (or register online with the DOR) if you make taxable sales, hire employees, or owe local exposition, premier resort area, rental vehicle, or dry cleaning taxes.
• Step 3: Set up My Tax Account (MTA) and check the Wisconsin Tax Number and Filing Frequency Inquiry tool to confirm your monthly, quarterly, or annual filing schedule.
• Step 4: Register for a UI account on the DWD Employer Online Services portal when hiring employees, and track the first $14,000 of each worker's annual wages.
• Step 5: Submit electronic DOR sales tax returns and ACH Debit payments before 4:00 p.m. CST on the due date (the 20th for early monthly filers, or the last day of the following month for standard filers), even for $0 periods.
• Step 6: Check the DWD Voluntary Contribution Calculator between mid-October and November to see if a voluntary payment lowers your next year's UI tax rate.
• Step 7: Retain all tax records, inventories, receipts, invoices, and exemption certificates for the 4-year audit period required under sec. 77.59(3), Wis. Stats.

• revenue.wi.gov: DOR Businesses Skip to main content Wisconsin.Gov Agency Directory Online Services State o
• revenue.wi.gov: DOR Sales and Use Tax

Worked Example: First-Year Wisconsin Sales and UI Taxes

Scenario: You open a non-construction retail and service shop in Madison, Wisconsin, and hire two employees who each earn $35,000 a year. In your first month, you have $0 in taxable retail sales because you are still setting up your storefront. What accounts do you need, what is your first-year Wisconsin UI tax cost for those two employees, and do you have to file a sales tax return for that first month?

Example answer written by our team. The business owner is invented. Before making sales or running payroll, I get a federal EIN from the IRS and submit Form BTR-101 to the Wisconsin Department of Revenue to get both my Seller's Permit and my state employer withholding account. I also register with the Wisconsin Department of Workforce Development for an Unemployment Insurance account. Because I hold an active Seller's Permit, I must file my Wisconsin sales and use tax return in My Tax Account by 4:00 p.m. CST on the due date for my first reporting period, even though my taxable sales were $0. For my two employees earning $35,000 each, Wisconsin UI tax only applies to the first $14,000 of each worker's wages, though I still report the remaining $21,000 per worker on my quarterly DWD wage reports. Since my total payroll is under $500,000 and I am a new non-construction employer, my UI tax rate for 2026 and 2027 is 3.05%. That equals $427.00 per employee, or $854.00 total in Wisconsin UI tax for the year. I also keep my separate retail and nontaxable service records on file for at least 4 years.

• revenue.wi.gov: DOR Sales and Use Tax
• dwd.wisconsin.gov: 2027 Tax Rate Schedule for Employers

Recordkeeping, Refunds, and Closing a Business in Wisconsin

Under sec. 77.59(3), Wis. Stats., and sec. Tax 11.92, Wis. Adm. Code, Wisconsin businesses must preserve business transaction records (inventories, purchases, sales, canceled checks, receipts, invoices, and bills of lading) for the 4-year period open to audit, or longer if extended by agreement or re-determination petition. If you run both a taxable retail operation and a nontaxable service, you must keep separate records for each, or the DOR can impose sales tax on total receipts from all operations. All retail sales are presumed taxable unless you collect a completed exemption certificate or record the buyer's name and address, sale date, item sold, exemption amount, and exemption reason.

You can amend a sales and use tax return in My Tax Account or on paper Form ST-12 with an e-file waiver. Buyers who paid sales tax in error can claim a refund in My Tax Account or on Forms S-220 and S-220A if the claim is $50 or more, the seller closed, the buyer is under audit, or the period is open for the buyer but closed for the seller.

When closing a business, ending taxable sales, or changing your legal entity, notify the DOR in My Tax Account, by emailing DORSalesandUse@wisconsin.gov, or by calling (608) 266-2776 with your last date of sales, account number, locations, and FEIN. You must also file a final sales tax return within 30 days of the cease date. Selling used business personal property (excluding resale inventory) is exempt from sales tax only if sold after you completely cease operating at that location. Selling surplus assets of a continuing business, or selling motor vehicles, boats, snowmobiles, mobile homes not exceeding 45 feet, trailers, semi-trailers, ATVs, or aircraft, remains taxable.

If you want our team to handle your federal and Wisconsin tax filings and monthly books, Aldro is the cheapest way to get your business taxes done: $399 flat, with bookkeeping at $20 a month. The flat price covers everything tax for the year (every federal and state or provincial business return: Schedule C, 1065, 1120-S, 1120 and state returns. T2 and T1 with T2125 in Canada), multi-state returns at the same price, and the owner's personal return when the business income needs it. Extensions and quarterly estimate reminders are included, along with 1099-NEC slips, city and local business returns, and state franchise tax reports, and we work out quarterly estimates. Bookkeeping covers unlimited bank and card accounts, monthly reconciliation and statements, but not payroll processing or sales-tax filing.

• revenue.wi.gov: DOR Sales and Use Tax
• IRS: Business taxes

Wisconsin Business Tax and Accounting Guides

Explore our related Wisconsin resources to compare a small business accountant in Wisconsin, set up online bookkeeping in Wisconsin, or manage business tax preparation in Wisconsin. You can also review our dedicated guides on the Wisconsin small business tax rate, Wisconsin self-employed tax, and how to file business taxes in Wisconsin.

• revenue.wi.gov: DOR Sales and Use Tax
• IRS: Business taxes