The Wisconsin (WI) state sales tax rate is currently 5.0%. Depending on local municipalities, the total tax rate can be as high as 5.6%.

Other, local-level tax rates in the state of Wisconsin are quite complex compared against local-level tax rates in other states. Wisconsin sales tax may also be levied at the city/county/school/transportation and SPD (special purpose district) levels.

Wisconsin sales tax has numerous local taxing levels that must be monitored and maintained on a regular basis, it is complex and time consuming due to the volume of jurisdictions.

Amazon.com is building a fulfillment center in Wisconsin. This physical presence, or nexus, creates a sales tax obligation for Amazon and many sellers participating in Amazon’s Seller Central and Fulfillment By Amazon (FBA) programs. Amazon began collecting sales tax in Wisconsin in November 2013.

Wisconsin sales tax must be collected on retail sales, leases, or rentals of tangible personal property or taxable services. As a Streamlined Sales Tax state, Wisconsin encourages businesses without a sales tax obligation to register with the state and collect.

How to Register

Sellers permits are required of all businesses making direct retail sales of tangible property or taxable services. Applications should be submitted at least three weeks before opening a business. Online registration is most expedient and is available through the Department of Revenue. Alternatively, paper applications may be downloaded and mailed to the department.

Businesses selling into multiple states may register with the Streamlined Sales Tax Project.

How to File and Pay

Electronic returns are required for sales tax filers. There are three ways to file Wisconsin sales and use tax returns electronically:

Sales tax returns must be filed even if no tax is due.

Deadlines

Most sales and use tax returns are due by the last day of the month following the end of the reporting period. However, early monthly sales tax filers are required to file by the 20th day of the month following the reporting period.  Additional information.

Avalara Sales and Use Tax Products for Wisconsin

AvaTax – AvaTax is a powerful, online sales tax compliance solution that provides all businesses with a level of sales tax automation that until now has been available only to Fortune 500 companies. AvaTax’s transaction-based service model and seamless integration into business applications gives you rapid access to all jurisdiction assignments and real-time sales tax calculations. Cutting-edge technologies and superior processing logic can manage even the most complicated tax issues, such as situs, nexus, tax tiers, tax holidays, exemptions, certificate management and product taxability rules.

TrustFile - Avalara TrustFile provides detailed sales tax reporting for online sellers. Allowing businesses to know exactly where, when and how much to file. Ecommerce business owners can use TrustFile to determine whether or not they are collecting the right amount of sales tax in each individual state, and then store a record of their sales tax history securely in the cloud for free.

Wisconsin Department of Revenue