Payroll Taxes by State: An Employer Guide

Most guides on this topic hand you a table of fifty states and leave you to work out which rows apply to you. That is the wrong shape for the real problem. This guide answers the question an employer is actually asking: what do I owe in the states where I have people, and what did I miss?

The thing most commonly missed is not a rate. It is an entire layer. Federal taxes are identical everywhere. State taxes vary but at least arrive with a registration process that tells you what to do. Local taxes arrive with nothing at all, apply in 5,055 jurisdictions across 16 states, and are triggered by a street address rather than by anything in your onboarding paperwork.

The sections below are organized around what varies rather than around the alphabet: three layers, who pays what, the three groups of states for income tax, unemployment insurance, the local layer, and what changes the moment you hire someone in a new state.

I build FirstHR for small businesses without a dedicated HR person, which is exactly where one remote hire creates an obligation nobody notices. This is general information rather than tax or legal advice, so verify against the state agency before acting.

The Three Layers of Payroll Tax

Every payroll tax an employer deals with sits in one of three layers, and knowing which layer you are looking at tells you how much it varies and who to ask about it.

This framing tells you where to spend your attention. The federal layer is fixed and well documented, so getting it right is a matter of using current figures. The state layer varies, but its registration process hands you your obligations. The local layer has no such process, which is why it is the one that goes unnoticed for years.

What Is the Same Everywhere

Before the state variation, the constant. These figures apply identically whether your employee is in Texas or Vermont, and they represent the majority of most employers' payroll tax burden.

Per the Social Security Administration, the contribution and benefit base rose to $184,500 for 2026, up from $176,100. That puts the maximum Social Security tax at $11,439 from each side for an employee at or above the cap.

The FUTA wage base moves on a different clock. It has sat at $7,000 since 1983, when a 1982 amendment to 26 U.S.C. 3306 took effect. Because the base is that low, most employees reach it within the first few months of the year, and your FUTA liability for them is finished.

Two federal quirks worth carrying into the state discussion. The additional Medicare tax breaks the matching pattern: it is withheld from the employee above $200,000 and the employer does not match it.

The FUTA credit is the other one, and it depends on what you do at the state level. Per IRS Topic 759, you earn the credit of up to 5.4 percent, which takes FUTA from 6.0 to 0.6 percent, by paying your state unemployment taxes in full and on time. Employers in states with outstanding federal loans see the credit reduced.

What Actually Varies by State

Five things change when you cross a state line, and it is worth being precise about them because they change in different ways.

Notice that only one of those five, the wage base, is a number you can look up in a table and apply. Your SUTA rate is specific to your business, not to your state, which is why every fifty-state rate table shows a range rather than a figure. The number that applies to you arrives in a notice from the state agency, usually once a year.

New York's Employer Compensation Expense Program

One state payroll tax is optional, which makes it unlike everything else on this page. New York runs an Employer Compensation Expense Program, and an employer that elects into it pays 5 percent on the New York payroll expense above $40,000 for each covered employee, under Tax Law section 852.

Employees covered by that election can then claim a wage credit against their New York personal income tax. The election is annual, made with the New York State Department of Taxation and Finance by December 1 for the following calendar year, so it is a decision you price in advance rather than a rate you inherit.

Employer Taxes vs Employee Withholding

This distinction determines what actually costs you money, and it is muddled in most state-by-state guides because they present everything in a single column.

The line worth internalizing: withholding is not the same as paying, but it carries the same responsibility. Money withheld from an employee for income tax was never yours and is not an expense to you. You are still the one who has to withhold the right amount, remit it on the right schedule, and file the right returns. Getting it wrong is your liability, not theirs.

On your books these two categories are recorded very differently, which is where the distinction becomes concrete. The employer taxes are an expense; the withholdings are a liability you are holding on someone else's behalf.

What SIT and SITW Mean on a Pay Stub

SIT is state income tax, and SITW, printed on some stubs as SIT withheld, is the amount of it you held back from an employee this pay period. Both labels describe the same money: state withholding taken from wages for the state where the work was performed, which you then remit to that state's revenue department on its filing schedule.

The figure is not a fixed percentage of gross pay, which is why two employees on identical salaries can show different SIT lines. It comes from two inputs: the state taxable wages for the period, which do not always match the federal figure, and the withholding election on file for that person. Change either input and the line moves.

State and local withholding elections are made on state forms rather than on the federal W-4. Some states run on allowances, some on a lettered withholding code, some on a flat exemption amount, and a few flat-rate states give an employee nothing to elect at all. Local jurisdictions that levy their own tax frequently want a separate certificate on top.

At year end the same money reappears on the W-2, split across six boxes. This is the point where an employer setup error turns into an employee filing problem, because the state and the municipality both read these numbers rather than your payroll register.

Two situations break that simple picture. An employee who worked in two states during the year gets a separate set of state boxes for each, split by where the work happened rather than by which state ran the payroll. The IRS instructions for Forms W-2 and W-3 cap one form at two states and two localities, so a third means a second Form W-2.

The other trap is the locality name. A blank or invented entry in Box 20 leaves the employee unable to file the local return, which is the version of this mistake that generates calls to you in filing season.

State Income Tax: Three Groups

For withholding purposes, every state falls into one of three groups, and the group determines how much work the withholding calculation is.

The other 41 states plus DC split into two structural types. According to Tax Foundation data for 2026, 15 states use a single-rate or flat structure, applying one percentage regardless of income, while 26 states plus DC use graduated brackets where the rate rises with income. Several states cut rates effective January 1, 2026, and the multi-year trend has been toward flatter structures.

For payroll purposes the structural distinction matters less than it sounds. You do not calculate brackets yourself: you follow the state's withholding tables or formula and the state's own withholding certificate, which is frequently a different form from the federal Form W-4. From your side, the practical difference between a flat state and a graduated state is mostly how sensitive the withholding is to a pay change.

A flat state is also not one where you simply withhold the headline rate. Louisiana replaced its 1.85, 3.5, and 4.25 percent brackets with a flat 3 percent rate effective January 1, 2025, yet that is not the rate employers withhold.

The Louisiana Department of Revenue publishes a withholding rate of 3.09 percent, set slightly above the statutory rate so fewer employees owe a balance at filing. That rate is applied under a formula that first subtracts a per-pay-period share of the standard deduction.

Louisiana revised its own certificate, Form L-4, at the same time, so an employee hired there on the federal W-4 alone is set up wrong. The general rule holds in every flat state: take the number from the withholding formula the revenue department publishes, not from the rate in the tax code.

How to Calculate State Income Tax Withholding

Calculating state tax withholding follows the same three moves in every state that has an income tax: start from state taxable wages, subtract whatever the state formula subtracts before the rate applies, then run the result through the table or percentage method for that pay frequency. What differs across states is the content of each move, not the sequence.

In practice those three moves become six steps, because the certificate on file, supplemental pay, and local tax each need handling of their own.

Two practical notes follow from that sequence. Withholding tables are built per pay period, so a change in pay frequency changes the withholding on every employee even when nobody got a raise. And the result is a projection rather than a settlement: it is designed to land near the annual liability, and the employee squares the difference on the state return.

If you are calculating payroll tax withholding by hand rather than in software, work from the withholding publication the state revenue department issues for the current year rather than from a rate you remember. Most of those publications carry a worked example. Matching your own calculation to it once, per state, is the fastest way to catch a configuration error before it repeats for a year.

State Unemployment Insurance: The One You Cannot Look Up

SUTA is the state tax that costs employers the most and confuses them the most, because unlike every other payroll tax it does not have a published rate that applies to you.

Three variables determine what you pay. First, the state rate range, which each state sets for itself: it starts at or near zero in many states and tops out at 10 percent or more in only a handful. Second, the taxable wage base, also state-set. Third, your experience rating, which is your own history of unemployment claims and which moves you within the state range.

The taxable wage base has the widest spread of the three. The Department of Labor table of significant provisions of state unemployment insurance laws, effective January 2026, puts California, Florida, and Arkansas at the federal floor of $7,000 and Washington at $78,200 for the same employee.

Two operational points follow. Your rate changes annually, and the notice arrives late in the year or early in the next, so a rate you used last January is probably wrong this January. And layoffs raise it, with a lag, which is a real if rarely mentioned cost of workforce reductions.

The Three States Where Employees Pay Unemployment Too

In 47 states, unemployment insurance is funded entirely by employers and nothing comes out of employee wages for it. In three, it does not work that way.

Those three rates come from the state agencies themselves: the Alaska Department of Labor and Workforce Development, the New Jersey Department of Labor and Workforce Development, and the Pennsylvania Department of Labor and Industry. All three are restated annually.

New Jersey deserves particular attention because employees there see four separate state deductions rather than one, each with its own rate and not all on the same wage base. Alongside unemployment sit the workforce development fund at 0.0425 percent, disability insurance at 0.19 percent, and family leave insurance at 0.23 percent. The last two run to a much higher $171,100 wage base.

That structure is why a first New Jersey setup goes wrong so often. Configure only unemployment and the disability and family leave withholdings are missing, which you will owe regardless of whether you collected them.

The wider point is that employee-side state deductions are not limited to these three. A growing number of states fund disability or paid family leave programs partly or wholly through employee contributions, without touching unemployment insurance. Those programs are a separate question from SUI and should be checked separately for every state where you have people.

Local Payroll Taxes: The Layer Nobody Warns You About

This is the section that justifies the article, because local tax is where a compliant-looking small business is most often quietly non-compliant.

According to Tax Foundation research (2023), local income taxes are imposed by 5,055 jurisdictions across 16 states, counting counties, cities, school districts, and special taxing districts. The concentration is extreme: Ohio and Pennsylvania account for the large majority of them.

One sourcing note worth flagging, because you will encounter both numbers. The Tax Foundation figure of 5,055 counts jurisdictions levying income taxes specifically. Payroll technology vendors sometimes cite a higher count, which takes in all local taxing jurisdiction types, including ones that do not tax income. Both are defensible; they answer different questions, and quoting one as the other is a common error.

Indiana publishes a rate for all 92 counties in Departmental Notice #1, keyed to the county of residence on January 1. New York is the odd one out: its metropolitan commuter transportation mobility tax is an employer tax rather than an employee withholding, with its own payroll thresholds.

How to Look Up the Local Tax for an Address

There is no national tax jurisdiction lookup and no code you can derive from a ZIP. Each state that permits local income taxes runs its own address search, and the two states that account for most of the problem both publish a good one. Give it the full street address and it returns the jurisdictions that apply.

Ohio runs The Finder, the address lookup operated by the Ohio Department of Taxation. Enter a street address and a date and it returns the tax jurisdiction information for that point, municipality and school district included. The department recommends verifying the result with the municipality or county auditor even when no liability is indicated.

Pennsylvania runs an address search through its Department of Community and Economic Development. You enter a home address and a work address together, and it returns both PSD (political subdivision) codes, the resident and nonresident earned income tax rates, the local services tax, and the collector for each. That output is precisely what Act 32 withholding requires.

Whatever the lookup returns is also what belongs in the locality name box on the W-2 at year end, so it is worth recording the exact wording rather than a paraphrase. In states with no central tool, the municipal or county tax authority for that specific address is the source, and a ZIP code estimate is not a substitute for it.

Philadelphia is the one local wage tax large enough to plan around on its own. Per the city guidance for employers, an employer located in Pennsylvania must register with the city within 30 days of employing a Philadelphia resident or a nonresident who performs services in the city.

The wage tax rate is 3.735 percent for residents and 3.425 percent for nonresidents, effective July 1, 2026. Residents owe it wherever they work, so a Philadelphia address on a fully remote hire pulls you into the city whether or not anybody sets foot there.

Hiring Across State Lines

One remote hire in a new state changes your obligations in that state immediately, and the trigger is easy to miss because nothing about the hire feels like a tax event.

The first point is the one that catches small businesses hardest, and it mirrors what happens with state retirement mandates: obligations follow the employee's work location rather than your state of incorporation. A company registered in Florida with employees there and in three other states has payroll tax obligations in four jurisdictions, not one.

Reciprocity deserves a specific caution because it is routinely misunderstood. Where two neighboring states have an agreement, an employee living in one and working in the other can generally elect withholding for their home state instead of their work state, using a form specific to that agreement. It changes income tax withholding only. It never changes which state you owe unemployment insurance to, and assuming otherwise creates an unregistered obligation.

What Triggers at What Headcount

Some obligations attach with your first employee and some wait for a threshold. Knowing which is which lets you anticipate rather than react, which matters because thresholds arrive with growth rather than with a notice.

The state paid leave programs are the clearest case of a payroll contribution that waits for a threshold, and the count is taken state by state rather than company-wide.

The Delaware paid leave program is the worked example. Under Title 19, Chapter 37 of the Delaware Code, it exempts employers with fewer than 10 employees, applies a 0.32 percent parental-leave-only rate from 10 to 24, and reaches the full 0.8 percent at 25 or more.

The employer may deduct up to half of that contribution from employees and stays liable for the whole amount either way. A distributed company can therefore sit under the threshold everywhere and contribute nothing, then acquire a new payroll line mid-year on the single hire that takes one state's count from 9 to 10.

The pattern worth extracting: payroll tax obligations mostly attach at one employee, while employment law obligations mostly attach at thresholds. Registration for unemployment insurance and income tax withholding is not something you grow into. It applies from the first person you hire in a state, which is why the very first hire in a new state is the moment to check rather than the fifth.

Registering in a New State

Here is the sequence when you hire your first employee in a state you have not operated in before.

The rates that come out of that sequence are the part no published table can give you. Your unemployment rate is assigned to your account, your wage base and your local rates depend on where people actually sit, and all of it is restated every January.

Keep the figures you are actually running payroll on in one place, with the year they apply to and the notice they came from, so that next January is a comparison rather than a search. Account numbers belong in the registration tracker; this register holds rates.

Keeping Rates Current

Payroll tax figures decay on a predictable schedule, which makes maintenance a calendar task rather than a research project.

Every January, three things change at once: the Social Security wage base, your state unemployment rates and wage bases, and any state income tax rate changes effective January 1. This is the single most important maintenance moment of the year, and running a January payroll on last year's figures produces errors across every employee.

Your SUTA rate notice arrives separately from all of that, usually late in the prior year, and applies only to you. It is easy to file the notice and forget to enter the new rate into payroll.

Local rates can change mid-year in some jurisdictions, which is the one item with no reliable annual rhythm. In practice this is a reason to rely on a payroll system that maintains local tables rather than tracking them manually.

For authoritative starting points: the Department of Labor list of state unemployment tax agencies gives you the right contact for every state, and the IRS employment taxes overview covers the federal layer. Neither replaces your own state agency for the figures that apply to you specifically.

Quick Self-Check

Six questions. Any uncertain answer points at a registration or a rate worth confirming this week.

None of this requires a payroll specialist. It requires a list of states, two registrations in most of them, and one January maintenance pass.

Frequently Asked Questions