Payroll Wisconsin: Employer Tax and Software Guide

Wisconsin is administratively one of the easier states to run payroll in, and the reasons are mostly about what is absent rather than what is present.

No local income tax in any city, village, town, or county, which removes the address-level tax resolution problem that makes payroll error-prone in Ohio, Pennsylvania, and Alabama. No state disability insurance program. No paid family leave contribution. An unemployment system sitting on its lowest rate schedule for a second consecutive year. And a pay frequency rule loose enough that monthly payroll is legal, which most states do not permit.

What Wisconsin does have is a graduated income tax with four brackets, a state withholding form that exists alongside the federal one, reciprocity agreements with four neighbors that matter enormously along the Illinois border, and a workers compensation trigger that catches employers with a single part-time worker. This guide covers what the state requires, what changed for 2026, and how 10 payroll providers price the work.

What Wisconsin requires from employers

State income tax withholding

Wisconsin uses four graduated brackets. The Department of Revenue publishes the range as 3.50 percent to 7.65 percent, with the top rate applying to taxable income above $315,310 for single filers and $420,420 for married filing jointly.

Wisconsin Act 15, signed by Governor Evers on July 3, 2025, expanded the 4.40 percent bracket so that a larger slice of middle income is taxed at that rate rather than at 5.30 percent. For an employer the change is invisible if the platform updated its tables and produces quietly wrong withholding if it did not.

Wisconsin also applies a sliding-scale standard deduction that phases out as income rises, which is unusual and is handled inside the withholding tables rather than by the employer.

Unemployment insurance

Schedule D remained in effect for a second consecutive year under Wisconsin Statute 108.18, which is the state signalling a healthy trust fund. The wage base is higher than in states like Ohio or Arizona, so unemployment cost per employee runs higher at the top of the range, but employers with clean claims histories can reach a rate of zero, which not every state permits.

Form WT-4 and the reciprocity question

Two withholding forms

Every Wisconsin employee completes both the federal W-4 and Form WT-4, the Wisconsin Employee's Withholding Exemption Certificate. The reason is the same timing mismatch that produced state forms in Georgia, Hawaii, and Connecticut: the federal W-4 abandoned the allowance method in its 2020 redesign, and Wisconsin kept it.

WT-4 also collects information with no federal counterpart, including boxes for taxpayers aged 65 or over and for blindness, and a method to claim additional allowances where itemized deductions exceed the standard deduction.

Reciprocity with four neighbors

Wisconsin has income tax reciprocity agreements with Illinois, Indiana, Kentucky, and Michigan. A resident of any of those states working in Wisconsin is not subject to Wisconsin withholding and is taxed by their home state instead, and the reverse holds for Wisconsin residents working across those lines.

The last two rows are the trap. Wisconsin borders six states but has agreements with only four of them. Minnesota and Iowa are not covered, so an employee commuting from either is subject to ordinary Wisconsin withholding. In the Twin Cities metro, where the Minnesota border runs through commuting distance of Hudson and River Falls, that distinction is a live operational question rather than a technicality. Our guide to multi-state payroll processing covers how these arrangements work more broadly.

Wage rules and the workers comp triggers

Minimum wage and the opportunity rate

Wisconsin's minimum wage is $7.25, matching the federal floor and unchanged since July 2009. It is one of the few states where the state and federal rates are identical, so there is no higher-rate calculation to perform.

The opportunity wage ends at 90 consecutive days or on the employee's twentieth birthday, whichever comes first, which means it carries a date that has to be tracked per employee rather than set once. Local governments cannot set higher minimum wages under 2015 Wisconsin Act 55, so unlike Arizona or Ohio there is no city-level variation. Our guide to the minimum wage for tipped employees covers how the tip credit tests work.

Pay frequency and final pay

Wisconsin Statute 109.03 requires that no more than 31 days pass between pay periods. That is unusually permissive: most states mandate at least twice-monthly payment, and several require final pay within days of a discharge. Monthly payroll is legal in Wisconsin. Our guide to the final paycheck for a terminated employee covers how separation timing rules differ across states.

Workers compensation has two triggers

This is the Wisconsin requirement small employers most often miss, because the headline threshold is not the only one.

Either trigger creates the obligation independently. The second one is what catches a two-person operation: $500 in combined gross wages in a single quarter is a very low bar, reachable by one part-time employee working a handful of weeks. An employer who checked the three-employee rule and concluded they were exempt may still be covered by the wage test. Our guide to workers compensation insurance covers how state thresholds compare.

10 payroll providers for Wisconsin employers compared

Every provider below files Wisconsin state withholding and unemployment insurance. Because there is no local tax layer and no state disability or paid leave program, the differentiators here are narrow: whether the platform files the quarterly UCT-101 including for zero-rated employers, and how it handles the four reciprocity states.

OnPay

One plan at $49 per month plus $6 per employee, everything included, no tiers to climb. Tax filing covers all 50 states with no multi-state surcharge, and year-end W-2 and 1099 filing sits in the base price. OnPay maintains a Wisconsin-specific tax rates resource, a reasonable proxy for whether a vendor keeps state tables current after a bracket change.

Gusto

The most common first payroll purchase for US small businesses, with automatic tax filing, published pricing, and the strongest onboarding experience among payroll-first platforms. Simple runs $49 per month plus $6 per employee after a base increase in early 2026.

The single-state limit on Simple is sharper in Wisconsin than the headline suggests. The state borders six others, four with reciprocity and two without, and the Illinois and Minnesota corridors both carry meaningful commuter traffic. One hire across either line moves you to Plus at $80 plus $12 per employee.

Patriot Software

The cheapest legitimate full-service payroll on the market. Full Service is $37 per month plus $5 per employee and includes federal and state tax filing plus new hire reporting. Basic is $17 plus $4 if you file taxes yourself, which in Wisconsin means handling the quarterly UCT-101 and the withholding deposits by hand.

Square Payroll

At $35 per month plus $6 per person, Square is the cheapest full-service option with published pricing, and the full-service plan covers state tax filing and new hire reports. For a Milwaukee or Madison restaurant already running Square point of sale, timecard data flows straight into payroll, which also makes the 90-day opportunity wage window easier to track.

SurePayroll

Owned by Paychex and built for very small employers and household employers. Full Service is $29 per month plus $7 per employee, with a flat $9.99 monthly multi-state fee rather than a per-state charge, which suits a Wisconsin employer with one person over the Illinois or Minnesota line.

QuickBooks Workforce Payroll

Core is $50 per month plus $6.50 per employee, and the argument for it is unchanged: if your books live in QuickBooks Online, payroll reaches the general ledger without an export.

ADP RUN

ADP has the deepest tax compliance engine in the category. In Wisconsin that depth converts into value mainly around handling the reciprocity states correctly and pushing bracket changes like the Act 15 adjustment without customer intervention.

The cost is opacity. ADP does not publish RUN pricing; third-party estimates put Essential near $79 per month plus $4 per employee, but every quote is individual. Contracts typically run a year with automatic renewal and a 30 to 60 day cancellation window.

Paychex Flex

Paychex competes on service rather than software, with a named representative at higher tiers. Unusually among the quote-driven vendors, it publishes an entry rate: Essentials at $39 per month plus $5 per employee, with higher tiers quoted individually. Quarterly administrative charges appear regularly in customer reports.

Paylocity

Paylocity sits between small-business payroll and full HCM, aimed at companies that have outgrown basic payroll. It publishes detailed per-state tax facts including Wisconsin, and the HR module covers performance, learning, and engagement alongside payroll. Pricing is quote-based and implementation is a project rather than a signup.

Rippling

Rippling unifies payroll, HR, and IT provisioning on one employee record. The core platform is $35 per month plus $8 per employee, with payroll as a separate module. Real-world all-in costs land between $25 and $45 per employee per month once you assemble a working configuration.

What each provider actually costs a Wisconsin employer

The table below models published rates at three headcounts. Wisconsin is one of the states where these figures approximate the whole software cost, since there is no disability carrier, no paid leave remittance, and no local filings to add.

Square is the cheapest published option at every headcount, with Patriot and Paychex Essentials close behind. Paychex is worth a second look here precisely because it publishes an entry rate: at 25 employees its $164 sits below OnPay and Gusto while carrying a service model those two do not offer, though the higher tiers where dedicated support lives are quoted rather than listed.

Choosing a payroll provider for Wisconsin

Before you choose

FirstHR does not process payroll, file payroll taxes, or administer benefits. Every provider above does something we do not, and if running payroll is the problem in front of you, one of them is the answer.

What we handle is the document layer that feeds payroll: onboarding workflows, e-signature on Form WT-4, I-9s, and offer letters, employee records, and document management for 5 to 50 employee US teams at a flat $98 to $198 per month. Two of the Wisconsin requirements above are document problems rather than payroll problems, namely getting WT-4 signed before day one alongside the federal W-4, and filing the new hire report within twenty days of the hire date. Our Wisconsin HR compliance guide covers the wider set of state obligations beyond payroll.

Frequently Asked Questions

What are the Wisconsin payroll taxes an employer has to handle?

Two at state level plus federal: income tax withholding on four graduated brackets from 3.50 to 7.65 percent, and unemployment insurance on the first $14,000 of wages at 3.05 percent for new non-construction employers under $500,000 of payroll. There is no local income tax, no state disability program, and no paid family leave contribution. See our overview of payroll taxes by state for how this compares elsewhere.

What are the Wisconsin income tax rates?

Four brackets at 3.50, 4.40, 5.30, and 7.65 percent, with the top rate above $315,310 for single filers and $420,420 for married filing jointly. Act 15, signed July 3, 2025, widened the 4.40 percent bracket so more middle income falls there rather than at 5.30 percent. Resources still showing 3.54 percent as the bottom rate are using pre-reform figures.

What is Form WT-4 and do Wisconsin employees need it?

WT-4 is the Wisconsin Employee's Withholding Exemption Certificate, required alongside the federal W-4. The federal form dropped allowances in its 2020 redesign and Wisconsin kept them, so the state needed its own. WT-4 also carries boxes for age 65 and over and for blindness, plus a method to claim extra allowances where itemized deductions exceed the standard deduction.

What is the Wisconsin unemployment insurance wage base and rate?

$14,000 per employee for 2026, with Schedule D in effect under Statute 108.18 for a second consecutive year. New non-construction employers pay 3.05 percent under $500,000 of taxable payroll and 3.25 percent above; construction pays 2.50 and 2.70 percent on the same split. Experienced employers range from zero to 12 percent, and zero-rated employers must still file quarterly. Our guide to state unemployment tax covers how experience rating works.

Which states have payroll tax reciprocity with Wisconsin?

Illinois, Indiana, Kentucky, and Michigan. Residents of those four working in Wisconsin are not subject to Wisconsin withholding and are taxed at home instead. Minnesota and Iowa also border Wisconsin but are not covered, so residents of those two are subject to ordinary Wisconsin withholding, which catches out employers along the Twin Cities corridor.

Does Wisconsin have local payroll taxes?

No. No city, village, town, or county levies a local income tax on wages, so there is no address-level tax resolution problem and no separate municipal filings. Wisconsin also preempts local minimum wage ordinances under 2015 Act 55, so no municipality sets a rate above the state floor.

What is the minimum wage in Wisconsin?

$7.25, matching the federal rate and unchanged since July 2009, with a tipped cash wage of $2.33 where wages plus tips average at least $7.25. An opportunity wage of $5.90 applies to workers under 20 for their first 90 consecutive days, or $2.13 for tipped opportunity employees, ending at 90 days or the twentieth birthday, whichever comes first.

How often must Wisconsin employers pay employees?

No more than 31 days may pass between pay periods under Statute 109.03. That is more permissive than most states, which typically require at least twice-monthly payment, and it means monthly payroll is legal in Wisconsin. Employers may pay more frequently and most do.

When must Wisconsin employers carry workers compensation insurance?

At three or more employees full-time or part-time, or where one or more employees are paid $500 or more in gross combined wages in any calendar quarter, with coverage required by the tenth day of the first month of the next quarter. Either trigger applies independently, and the wage test catches very small employers the headcount rule would miss.