How does Wisconsin state income tax and unemployment insurance work in 2026?
Wisconsin taxes wages on four graduated brackets, from 3.50% to 7.65%. On top sit a $14,000 unemployment wage base at a 3.05% new-employer rate and the full federal payroll stack.
· Wisconsin, United States guide
Illustration · Milwaukee, Wisconsin
Wisconsin is a graduated-tax state, and out-of-state employers feel it on the first payroll. There is a state income tax, with four brackets running from 3.50% to 7.65%, so you withhold state tax on every Wisconsin employee using Form WT-4.
The employer cost sits in two more boxes. Unemployment insurance runs on a $14,000 wage base with a new-employer rate of 3.05% for most employers. You run the full federal stack on top, while Wisconsin keeps the federal $7.25 minimum wage and mandates no state paid family leave, so your Wisconsin leave obligations run through unpaid, job-protected channels only.
Does Wisconsin have a state income tax in 2026?
Yes. Wisconsin taxes wages on four graduated brackets in 2026: 3.50% up to $14,679 for a single filer, then 4.40%, 5.30%, and a top rate of 7.65% above $323,290.
You withhold state income tax on every Wisconsin employee. There is a state withholding form, Form WT-4, that sits alongside the federal W-4.
The single-filer bands for 2026 are 3.50% on the first $14,679, 4.40% from $14,680 to $50,479, 5.30% from $50,480 to $323,289, and 7.65% above $323,290. The 2025 budget, Act 15, widened the 4.40% band so more income is taxed at the second rate, which lowered the bill for most Wisconsin workers.
The brackets adjust for inflation each year, so you'll want the Wisconsin Department of Revenue's current withholding tables for the precise 2026 thresholds. Withholding follows the employee's WT-4, and you remit it to the Wisconsin Department of Revenue on the same schedule as your federal deposits. Wisconsin also runs a sliding-scale standard deduction worth up to $12,760 for a single filer, which shrinks as income rises and changes the tax actually withheld. Compare that layer to how neighbouring Minnesota handles graduated withholding if you're hiring across both states.
How does Wisconsin withholding and supplemental pay work?
Register with the Wisconsin Department of Revenue for a withholding account, collect a Form WT-4 from each employee, and remit state income tax with your federal deposits. Supplemental wages like bonuses use a flat top rate of 7.65% when you pay them separately.
Wisconsin doesn't stop at withholding. You also fund unemployment insurance and run the full federal payroll stack on every Wisconsin hire.
Your first Wisconsin hire triggers four-bracket withholding: 3.50% to $14,679, then 4.40%, 5.30%, and 7.65% above $323,290. Pay a bonus separately and you withhold at the flat top rate of 7.65%.
Source: Wisconsin Department of Revenue, individual income tax
The WT-4 matters because an employee can claim different exemptions for state than for federal, and you must keep the form on file. Get the registration wrong and you face late-deposit penalties from the state on top of the federal ones. The cadence is the trap for first-time Wisconsin employers: state withholding deposits track your federal deposit frequency, so a semi-weekly federal filer is a semi-weekly state filer too. Your Wisconsin wage and overtime obligations sit alongside these withholding requirements.
Supplemental pay has its own rule. Wisconsin lets you withhold a separately paid bonus at a flat rate, with 7.65% as the top tier, or you can roll the bonus into regular wages and run it through the standard tables. Pick one method and apply it consistently, because the two produce different take-home on the same bonus.
What is Wisconsin's unemployment insurance wage base and rate for 2026?
Wisconsin's UI taxable wage base is $14,000 per employee for 2026, unchanged from prior years. Most new non-construction employers pay a UI rate of 3.05%, while new construction employers pay 2.50%.
Once an employer has claims history it moves onto an experience rating, which under the 2026 schedule runs from 0.00% to 12.00%.
You pay UI on the first $14,000 of each employee's wages in 2026; everything above that in the calendar year is exempt. Wisconsin holds a new employer on the 3.05% rate (or 2.50% for construction) for the first three calendar years, before its own layoff history sets the rate. Larger payrolls of $500,000 or more start slightly higher. File quarterly with the Wisconsin Department of Workforce Development.
After that, the experience rating drives the number: a clean claims record can fall to 0.00%, while a heavy layoff history can reach 12.00%. The federal FUTA layer sits on top: effective 0.6% on the first $7,000 of wages once you take the full credit for paying Wisconsin state unemployment tax on time. Wisconsin is not a credit-reduction state, so that rate holds in full. For a side-by-side with a neighbour, see how Illinois handles UI rates and wage-base exposure. Source: Wisconsin DWD, employer UI tax rates.
What other payroll rules apply to Wisconsin employees?
You run the full federal stack: Social Security at 6.2% to $184,500, Medicare at 1.45%, and FUTA at an effective 0.6%. Wisconsin keeps the federal minimum wage of $7.25 an hour, with a $2.33 cash wage for tipped staff.
Wisconsin mandates no state paid family leave and runs no state payroll premium for it. The job-protected layer is unpaid: federal FMLA and the unpaid Wisconsin Family and Medical Leave Act. See full details on Wisconsin leave and paid-time-off obligations.
The federal employer taxes are the same everywhere, but the numbers move each year. Social Security is 6.2% on the first $184,500 of 2026 wages, Medicare is 1.45% with no cap, and FUTA is an effective 0.6% on the first $7,000 of wages after the state credit. Wisconsin is not a credit-reduction state for 2026, so the 0.6% rate holds in full.
On wages and leave, Wisconsin sticks close to the federal floor. The minimum wage is $7.25 an hour, unchanged since 2009, with a tipped cash wage of $2.33 where tips bring the total to $7.25. Your Wisconsin wage and overtime rules govern how you apply that floor. There is no state paid-family-leave programme and no state disability insurance, so federal FMLA and the unpaid Wisconsin Family and Medical Leave Act are the only job-protected family-leave layers. Neither adds a payroll premium to your Wisconsin register. For a full breakdown, see Wisconsin paid family and sick leave.
How Teamed runs Wisconsin payroll end to end
Teamed becomes your legal employer of record in Wisconsin for $599 per employee per month flat. Zero FX mark-up. Statutory employer cost passes through itemised on every invoice.
You hire the person. Teamed registers with the Wisconsin Department of Revenue and DWD, withholds state income tax on the 7.65% bracket schedule, runs unemployment insurance on the $14,000 wage base, and files every return. Everything runs on one platform.
Real HR and legal experts handle your Wisconsin hires and know the four-bracket WT-4 withholding, the $14,000 UI wage base, and the 3.05% new-employer rate by heart. An actual person, not a chatbot or a pooled queue. You see every cost: state income tax withheld, UI contributions, and federal employer taxes pass through at cost, itemised and auditable on every invoice. No setup fee, no exit fee.
Contractor onboarding, EOR payroll, and entity graduation all live on one platform: a Wisconsin contractor who converts to W-2 keeps their record, and that same employee can graduate to your own US entity without switching systems. Because Wisconsin carries real graduated withholding and a multi-return filing cadence, the administrative load per head is higher than in a no-tax state, which changes when your own entity pays off. Use the Crossover Calculator to see the month the model flips, and the point you might graduate to your own entity. EOR is the right model for Wisconsin, until it isn't. Compare your full Wisconsin employer cost with the Employer Cost Calculator, then talk to an expert when you're ready.
The mistake we see on Wisconsin is budgeting for income-tax withholding and stopping there. You also fund the unemployment wage base, run the federal stack, and file on a state cadence that tracks your federal deposits. The withholding column is the visible one; the employer-tax and filing load is where Wisconsin actually costs you time.
Wisconsin is a graduated-tax state, and your first payroll makes that plain.
Four brackets up to 7.65%, a $14,000 UI wage base, a federal stack, and a state filing cadence on top.
Real tax is not the same as hard payroll. We run the gap for you at $599 per head, zero FX.
