Waukesha County, WI property tax rate
Waukesha County · Wisconsin · #59 of 72 in the state
Median annual property tax $4,554 · median home value $398,200
$4,554 a year · $379 a month using the area benchmark. Enter a value such as 350,000 or 350,000.00.
A rough planning estimate, not a tax quote.
Above the U.S. benchmark 0.94% (1.22×), below the Wisconsin benchmark 1.42%.
Ranked among 72 Wisconsin counties with available benchmarks.
What this benchmark means
Median real estate taxes paid ÷ median owner-occupied home value, ACS 2020–2024 — a ratio of two medians, not a statutory rate, not the median of individual bills and not your property's rate. Exemptions people already claim are reflected in the survey; your bill depends on taxable value, local districts, exemptions and reassessment after a sale.
Census figures behind this page
| Median real estate taxes paid | $4,554 |
|---|---|
| With a mortgage / without | $4,595 / $4,481 |
| Median home value | $398,200 |
| Median household income | $106,076 · tax is 4.3% of it |
| Median gross rent | $1,356 / mo |
| Owner-occupied | 76% of 168,658 homes |
| Population | 411,762 |
When it's due in Wisconsin
All states| First installment | Due Jan 31 Late after Feb 1 under state law — the exact cutoff time, weekend/holiday carry-over and this year's date are on your bill. |
|---|---|
| Second installment | Due Jul 31 Late after Aug 1 under state law — the exact cutoff time, weekend/holiday carry-over and this year's date are on your bill. |
| Late penalty | 1% per month interest (12% annually) from February 1 until paid, plus optional county penalty up to 0.5% per month (Wis. Stat. § 74.47) |
| Appeal window | Board of Review hearings held typically in May/June; written objection required 48 hours prior to first meeting (Wis. Stat. § 70.47) |
Full payment or first installment due to municipal treasurer by January 31; second installment due to County Treasurer by July 31. Regular annual schedule; tax year: calendar 2026, bills mailed December. Source: Wis. Stat. § 74.11, § 74.12, rules checked 2026-09-19. Confirm the amount and deadline on your official tax bill.
Wisconsin counties with a similar rate
All 72How this benchmark was computed
Median real estate taxes paid by owner-occupied households in Waukesha County ($4,554) divided by the median value of those homes ($398,200), both from the Census Bureau's American Community Survey 2020–2024 5-year estimates. It is a ratio of two medians — a reasonable area benchmark, not the assessor's mill rate and not any one household's rate. Newly purchased homes are often reassessed to sale price, so a buyer's first bill can run above it. Data & method