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Live Data: April 2026

Oconomowoc, WI Sales Tax Rate 2026

The combined sales tax rate in Oconomowoc, Wisconsin is 5.500%.

Combined Rate 5.500%
State5.000% County0.500%

Oconomowoc Sales Tax Breakdown

Jurisdiction Rate
Wisconsin State Sales Tax 5.000%
County Sales Tax 0.500%
Total Combined Rate 5.500%

Which County Is Oconomowoc In?

Oconomowoc falls within Waukesha, Wisconsin. Waukesha imposes a 0.000% county-level sales tax in addition to the Wisconsin state base rate.

Oconomowoc ZIP Codes

The following ZIP codes are mapped to Oconomowoc for sales tax purposes. All listed codes apply the 5.500% combined rate.

53066

Business Nexus in Wisconsin

Economic Nexus Threshold

Selling into Wisconsin from out of state? Once you exceed $100,000 in annual sales or 200 transactions, you must register and collect Wisconsin sales tax.

FAQ: Oconomowoc Sales Tax

The combined sales tax rate in Oconomowoc, Wisconsin is 5.500% as of 2026.
Multiply your purchase price by 5.500% to find the tax owed. A $500 purchase would include $27.50 in sales tax.
Groceries are generally taxable in Wisconsin. Check the official Department of Revenue for specific exemptions.
Vehicle purchases in Oconomowoc are subject to the 5.500% combined rate, though some states apply different rules for vehicle sales. Verify with the Wisconsin Department of Revenue or DMV.
Register for a sales tax permit through the official Wisconsin Department of Revenue website. Registration is typically free and required before collecting any sales tax.

Sales Tax Calculator

Using 5.500% rate for Oconomowoc, WI

$
Tax Amount $0.00
Total with Tax $100.00

Rate applied: 5.500% combined

Official Tax Authority

Wisconsin Department of Revenue

Filing Deadline: Monthly returns due the last day of the following month. File via My Tax Account portal.

Visit Official Portal (608) 266-2776