Enter your details to estimate your Wisconsin income tax liability.
Single
Married Filing Jointly
Married Filing Separately
Head of Household
Estimated Wisconsin Tax:
$0.00
Understanding Wisconsin Income Tax
Wisconsin operates on a progressive income tax system, meaning that higher earners pay a larger percentage of their income in taxes. The state uses a series of tax brackets to determine the applicable tax rate for different portions of a taxpayer's taxable income.
How Wisconsin Income Tax Works:
Adjusted Gross Income (AGI): This is your gross income minus certain "above-the-line" deductions. It forms the starting point for calculating your tax liability.
Taxable Income: To arrive at taxable income, you subtract your allowable deductions (either the standard deduction or itemized deductions, whichever is greater) from your AGI.
Tax Brackets: Wisconsin's income tax is applied using marginal tax rates. This means different portions of your taxable income are taxed at different rates, as defined by the state's tax brackets.
Tax Calculation: The tax is calculated by applying the rates of each bracket to the portion of your taxable income that falls within that bracket, and then summing up the tax from each bracket.
Wisconsin Tax Brackets and Rates (2023 Tax Year – for illustrative purposes):
Note: Tax brackets and rates are subject to change annually. Always consult official Wisconsin Department of Revenue (DOR) resources for the most current information. The rates below are simplified and for demonstration. Actual calculations may involve different phases and specific rules.
Filing Status
Taxable Income Bracket
Tax Rate
Single / Married Filing Separately
$0 – $16,790
3.54%
$16,790 – $20,990
4.65%
$20,990 – $251,930
5.30%
$251,930 – $336,550
6.27%
$336,550+
6.75%
Married Filing Jointly / Head of Household
$0 – $23,730
3.54%
$23,730 – $35,020
4.65%
$35,020 – $297,170
5.30%
$297,170 – $403,870
6.27%
$403,870+
6.75%
Standard Deduction Amounts (2023 Tax Year – illustrative):
Single: $12,650
Married Filing Jointly: $18,970
Married Filing Separately: $9,485
Head of Household: $14,110
Note: These standard deduction amounts are for illustration and may differ for specific tax years and situations. The calculator uses the value you enter for deductions.
Who Should Use This Calculator?
This calculator is a useful tool for Wisconsin residents who want to get a quick estimate of their state income tax liability. It's particularly helpful for:
Individuals planning their finances throughout the year.
Understanding the potential tax impact of changes in income or deductions.
Comparing tax obligations based on different filing statuses.
Disclaimer
This calculator provides an estimate based on simplified tax bracket information for a specific tax year. It does not account for all possible tax credits, exemptions, special circumstances, or future tax law changes. For precise tax advice, consult a qualified tax professional or refer to the official Wisconsin Department of Revenue (DOR) website.
function calculateWisconsinTax() {
var income = parseFloat(document.getElementById("income").value);
var filingStatus = document.getElementById("filingStatus").value;
var deductions = parseFloat(document.getElementById("deductions").value);
var taxResultElement = document.getElementById("taxResult");
var taxDetailsElement = document.getElementById("taxDetails");
// Reset previous results and details
taxResultElement.innerText = "$0.00";
taxDetailsElement.innerText = "";
// Basic validation
if (isNaN(income) || income < 0 || isNaN(deductions) || deductions < 0) {
taxResultElement.innerText = "Invalid Input";
taxDetailsElement.innerText = "Please enter valid positive numbers for income and deductions.";
return;
}
var taxableIncome = income – deductions;
if (taxableIncome < 0) {
taxableIncome = 0; // Taxable income cannot be negative
}
var tax = 0;
var taxBreakdown = "";
// Wisconsin Tax Brackets and Rates (Illustrative 2023)
// Define brackets and rates based on filing status
var brackets = {};
if (filingStatus === "single" || filingStatus === "married_separately") {
brackets = [
{ limit: 16790, rate: 0.0354 },
{ limit: 20990, rate: 0.0465 },
{ limit: 251930, rate: 0.0530 },
{ limit: 336550, rate: 0.0627 },
{ limit: Infinity, rate: 0.0675 } // Last bracket has no upper limit
];
} else { // married_jointly or head_of_household
brackets = [
{ limit: 23730, rate: 0.0354 },
{ limit: 35020, rate: 0.0465 },
{ limit: 297170, rate: 0.0530 },
{ limit: 403870, rate: 0.0627 },
{ limit: Infinity, rate: 0.0675 }
];
}
var previousLimit = 0;
var taxBreakdownText = "Taxable Income: $" + taxableIncome.toFixed(2) + "\n";
for (var i = 0; i previousLimit) {
var incomeInBracket = Math.min(taxableIncome, currentLimit) – previousLimit;
bracketTax = incomeInBracket * rate;
tax += bracketTax;
taxBreakdownText += ` – Bracket ${i + 1} ($${previousLimit.toFixed(2)} – $${currentLimit === Infinity ? '∞' : currentLimit.toFixed(2)}): $${incomeInBracket.toFixed(2)} @ ${(rate * 100).toFixed(2)}% = $${bracketTax.toFixed(2)}\n`;
}
previousLimit = currentLimit;
if (taxableIncome <= currentLimit) {
break; // Stop if we've accounted for all taxable income
}
}
taxResultElement.innerText = "$" + tax.toFixed(2);
taxDetailsElement.innerText = taxBreakdownText.trim();
}