State tax reciprocity agreements: 2026 chart, forms and rules

Which state should this paycheck be taxed in, the one where your employee sleeps or the one where they work?

For most of the country the answer is both, at least to begin with. State tax reciprocity is the exception, and it is the reason someone living in Philadelphia and working in New Jersey pays Pennsylvania and nobody else. Get it right and payroll stays simple. Get it wrong and you are looking at double withholding, a refund claim, and a difficult conversation in April.

This guide covers what reciprocity is, the 2026 state pairs and forms, what these agreements quietly leave out, and how to fix withholding that has already gone to the wrong state.

What is state tax reciprocity?

State tax reciprocity is an agreement between two states that lets an employee who lives in one and works in the other pay state income tax only to their home state. The work state agrees not to tax or withhold on those wages. In 2026 there are 30 such agreements covering 16 states and the District of Columbia.

Wages can normally be taxed twice over, once where they are earned and once where the worker lives. That overlap is exactly why the difference between payroll tax and income tax causes so much confusion at state level. Reciprocity removes the overlap by assigning the wages to one state only.

It applies to state income tax on W-2 employees. It changes nothing about federal withholding, Social Security, or Medicare, all of which continue exactly as before (IRS, About Form W-4).

A quick example: Maria lives in Philadelphia and commutes across the river to Camden, New Jersey. Pennsylvania and New Jersey have a reciprocity agreement, so once Maria files Form NJ-165 with her employer, New Jersey withholding stops and Pennsylvania withholding starts. She files one state return. Without that form on file, New Jersey keeps withholding and Maria has to claim the money back a year later.

The Tax Foundation, which tracks these agreements state by state, describes the point of them plainly:

"Under these reciprocal agreements, states cooperate with their neighbors to eliminate the need to file in two states." Jared Walczak, Do Unto Others: The Case for State Income Tax Reciprocity, Tax Foundation

How does state tax reciprocity work?

Reciprocity switches on in three steps, and the order matters because the employer cannot act until the employee moves first.

1. Confirm the pair: Check that the employee's home state and the state their work is sourced to actually have an agreement. Neighbouring is not the same as reciprocal, and plenty of busy border crossings have no agreement at all.
2. File the exemption form: The employee completes the work state's certificate, such as Form WH-47 in Indiana or Form REV-419 in Pennsylvania, and hands it to the employer. It sits alongside Form W-4, not in place of it.
3. Switch the withholding: Payroll stops the work state line and starts the home state line from the next run, and the change shows up in the employee's payroll deductions straight away.

Until step two is done, the work state's tax is still legally due. Employers should never flip withholding on the strength of a verbal request or an email.

PayrollOrg, the professional body for US payroll practitioners, sums up the employer side of it well:

"When two states have a reciprocal agreement for tax purposes, it makes things administratively easier for the employer. The employer will only need to withhold for the state of residence, not the work state." PayrollOrg, Multi-State Taxation

Some states want the form back every year. Minnesota is explicit about it, telling Michigan and North Dakota residents they "must give your employer a completed Form MWR each year you do not want Minnesota income tax withheld" (Minnesota Department of Revenue). Illinois, Wisconsin, and Maryland run similar refresh rules. A form filed once in 2023 proves nothing in 2026.

If you are setting up multi-state payroll for the first time, our step-by-step walkthrough on how to run payroll covers where this check belongs in the sequence.

What are the types of state tax reciprocity agreements?

Not every agreement works the same way, and the differences decide who has to do what.

Bilateral agreements

Two states agree to exempt each other's residents. This is the most common form and accounts for 17 of the 30 agreements in force. Both states have to sign up, which is why a single state cannot create reciprocity on its own.

Unilateral offers

Indiana, Minnesota, and Wisconsin extend reciprocity automatically to residents of any state that offers comparable treatment, without negotiating pair by pair. The employee still has to file the exemption form, so nothing changes on the paperwork side.

Commuter exemptions

The District of Columbia is the standout case. Rather than naming partner states, it exempts every nonresident who works there and files Form D-4A. Maryland and Virginia sit either side of that arrangement, which is what makes the Washington commuter belt unusually clean to administer.

Reverse credits

Arizona, California, Indiana, Oregon, and Virginia use a credit mechanism instead of a straight exemption. The resident state gives the credit rather than the work state waiving the tax, so the relief arrives at filing time instead of in the paycheck. It is worth knowing because employees expecting a bigger take-home from day one will not see it here.

Which states have tax reciprocity agreements in 2026?

Sixteen states and the District of Columbia take part in 2026. Kentucky is the busiest participant with seven agreements, while Iowa and Montana have just one each. The table below pairs each work state with the home states it recognises and the exemption form the employee needs to file.

Two entries in that chart behave differently from the rest. Arizona works through a reverse credit rather than a true exemption, and the District of Columbia opens its exemption to any nonresident instead of to residents of named states.

In almost every case the form goes to the employer rather than to the state. Once it is filed, the change should appear on the very next pay stub, which is the quickest way for an employee to confirm it actually took effect.

Which states have no income tax at all?

Nine states do not tax wage income in 2026, which makes reciprocity irrelevant for anyone working in them:

• Alaska, Florida, Nevada, and New Hampshire
• South Dakota, Tennessee, and Texas
• Washington and Wyoming

New Hampshire is the newest name on that list. Its tax on interest and dividend income was repealed with effect from 1 January 2025, so it now taxes no personal income at all (New Hampshire Department of Revenue Administration). If your employee works in one of these nine, there is nothing to be exempted from, although their home state may still expect residence-state withholding.

What state tax reciprocity does not cover

This is where the expensive mistakes happen. A reciprocity agreement is narrower than most people assume, and several obligations sit completely outside it.

Local taxes keep applying

Cities and counties are not parties to these agreements. A Kentucky resident working in Cincinnati owes no Ohio state income tax, but still owes Cincinnati's local earnings tax and has to account for it separately. The same holds for Philadelphia's wage tax, Michigan's city income taxes, and Indiana's county rates. If your people work in Ohio, Pennsylvania, Michigan, Indiana, or Kentucky, treat local tax as its own exercise from the day you hire.

Unemployment insurance follows the work, not the form

State unemployment tax is decided by a localisation of work test, not by where the employee lives or which exemption form they filed. If an employee's services are localised in the work state, unemployment liability sits there, which usually means registering with that state's workforce agency even though you are withholding income tax somewhere else. This is the most commonly missed piece in multi-state setups, and it belongs in your employer payroll taxes checklist rather than your reciprocity one.

Non-wage income stays with the source state

Reciprocity covers wages and salary. Rent from a property in the work state, a share of business income, or capital gains sourced there stay taxable by that state and can still trigger a nonresident return, even when the employee's paycheck is fully exempt.

None of this applies to contractors. A 1099 contractor sits outside reciprocity entirely, because there is no employer withholding to exempt in the first place.

They handle their own estimated payments and state filings instead, which we cover in our guide to taxes for independent contractors.

Do state tax reciprocity agreements apply to remote workers?

Yes, with one large caveat. If an employee's work is sourced to a state that has an agreement with their home state, reciprocity applies exactly as it would for a commuter, and the exemption form is still required. That is straightforward when a distributed workforce happens to sit in states that already pair up.

The caveat is the convenience of the employer rule. A handful of states source a remote employee's wages to the employer's location when the person works from home for their own convenience rather than out of business necessity. Under that rule the work state claims the income even though the employee never set foot there, and it can override the reciprocity logic you would otherwise expect.

Two recent details are worth knowing. Nebraska narrowed its rule in 2024 so it now applies only when the nonresident employee is physically in the state for more than seven days in the tax year, which is real relief for fully remote staff who never travel there.

New Jersey's version, retroactive to 1 January 2023, applies to residents of states running a similar test, such as Delaware, Nebraska, and New York. The state confirms the law "does not apply to Pennsylvania residents who work in New Jersey, since there is a Reciprocal Agreement in place with that state" (New Jersey Division of Taxation).

The practical answer for a spread-out team is to map each person's home state and work source state once, then re-check it whenever somebody moves. Companies running remote workforce solutions at any scale tend to build this into onboarding rather than discover it at year end.

Can reciprocity agreements change or be added?

They can, and the best known example is still unresolved. Minnesota and Wisconsin ran a reciprocity agreement for more than forty years until Minnesota ended it with effect from 1 January 2010, citing delayed payments from Wisconsin. It has not been restored.

There has been movement since. 2023 Wisconsin Act 147 required the Wisconsin Department of Revenue to study the effect of reinstating the agreement jointly with Minnesota, and that study was delivered in December 2024. Any deal still has to be negotiated between the two revenue departments rather than passed as law, and Wisconsin continues to publish withholding guidance that treats reciprocity as terminated (Wisconsin Department of Revenue).

Arkansas is the counter-example. It once taxed nonresidents working in the state and later repealed the rule, which shows the direction of travel can go either way.

At federal level, versions of the Mobile Workforce State Income Tax Simplification Act have been introduced repeatedly to set a uniform day threshold before a nonresident triggers withholding. None has passed. Until one does, this stays a state-by-state exercise, which is a large part of why structured global payroll services exist at all.

The takeaway is simple: treat your reciprocity list as something to verify every year, not a chart to bookmark once.

How is state tax handled when there is no reciprocity agreement?

Most cross-border pairs have no agreement at all, and the default rules take over. Four things happen in sequence.

• The work state withholds first, because almost every state taxes income earned inside its borders regardless of where the earner lives.
• The employee files a nonresident return in the work state and a resident return at home.
• The home state grants a credit for tax paid to the work state, usually capped at what the home state would have charged on the same income.
• The employee effectively pays the higher of the two rates, and the filing work doubles.

Nobody ends up taxed twice on the same dollar, but nobody gets a simple return either.

That credit is not just good manners between states. In Comptroller of the Treasury of Maryland v. Wynne (2015) the Supreme Court held that a state scheme which failed to credit tax paid to other states was unconstitutional (The CPA Journal). That ruling is why the credit exists everywhere, and why reciprocity is a convenience improvement rather than a cure for double taxation.

What should you do if the wrong state was withheld?

Wrong-state withholding is fixable, but the fix has two halves: stop the bleeding, then recover what has already gone. Work through these five steps in order.

1. File the exemption form now: It corrects future paychecks, not past ones, and nothing else works until this is done.
2. Claim the refund from the work state: File a nonresident return there. Some states use a dedicated refund form, such as Virginia's Form 763-S (Virginia Tax).
3. Report the income at home: The wages still belong on the resident return even though the wrong state took the money.
4. Cover the shortfall: If the home state received nothing all year, make an estimated payment to avoid an underpayment penalty on top of everything else.
5. Set a reminder: Re-file the exemption form wherever annual certification is required, so the same problem does not repeat next January.

Employers should also correct the employee's records for the year, because a W-2 showing the wrong state complicates every one of those steps.

If an employee asks for help bridging the gap before the refund lands, read our guide to how a payroll advance works, since the rules there are separate again.

Getting this right the first time is mostly a question of setup. A payroll system that handles multi-state withholding cleanly prevents nearly all of it, which is worth weighing carefully when choosing a payroll provider.

How do employers benefit from state tax reciprocity?

Reciprocity is usually framed as an employee benefit, but the operational savings land on the employer's side of the desk. There are four worth naming.

• One withholding state per employee. That removes a whole class of reconciliation work and is what makes payroll automation genuinely reliable rather than mostly reliable.
• Fewer registrations. If nobody in a work state owes income tax there, you may avoid a withholding registration in that state, although unemployment insurance registration can still apply.
• Lower audit exposure. Single-state withholding backed by a signed exemption form on file is straightforward to defend.
• A wider hiring radius. You can recruit across a state line without adding a new tax jurisdiction to the monthly close, which quietly lowers your cost per hire.

None of these arrive automatically. The benefit only shows up when the exemption forms are actually collected, dated, and stored somewhere you can find them.

What are the best practices for employers managing reciprocal agreements?

Six habits separate the teams that never think about reciprocity from the ones that spend every March fixing it.

• Decide the withholding state before the first pay run: Confirm the home state and the work source state during onboarding, not after money has already gone out. Smaller teams often lean on payroll services for small business for exactly this step.
• Collect the exemption form as an onboarding document: Treat it like a W-4: no form, no exemption. Store it where you keep employment contracts and other signed paperwork.
• Track expiry dates: Where annual re-certification applies, put it in the calendar. An HRIS that flags expiring documents removes the manual chase entirely.
• Register where you actually need to: Income tax withholding and unemployment insurance are separate registrations with separate triggers, and reciprocity only touches the first one.
• Re-run the check when someone moves: A relocation changes the home state and can void the exemption already on file, sometimes mid-quarter.
• Keep the evidence: Auditors ask for the form, the effective date, and payroll records that match it, which is where employer of record compliance discipline pays for itself.

Done consistently, these take minutes per employee. Done retroactively, they take a quarter.

If the administrative load is the real problem rather than the rules themselves, the question shifts to who should run payroll at all. Read PEO vs payroll services for the trade-offs between the two models.

For a fuller picture of the co-employment route, see what is a PEO and how the model allocates liability.

For companies that would rather hand the whole function over, our comparison of outsourced payroll services is the better starting point.

One last note on where to check. Community knowledge bases are often clearer than the statutes themselves. FreeTaxUSA's help centre, for instance, reduces the whole idea to a single sentence:

"A reciprocal agreement between states allows a resident, who lives in one state and works in another state, to file only one resident state return, and only have tax withheld for the resident state." FreeTaxUSA Community

Useful as a sanity check, but always confirm against the work state's own revenue department before you change a withholding line.

How Wisemonk helps

Wisemonk is an Employer of Record and managed payroll partner for companies whose teams sit in more than one country.

State reciprocity is a domestic US question that your US payroll handles. The moment your headcount crosses a border, the equivalent questions are completely different: local withholding, statutory contributions, employment law, and who is legally the employer.

That is the part we take on. We act as the legal employer, run payroll end to end, handle statutory deductions and filings, issue compliant contracts, and stay accountable for the compliance record, so your finance team is not learning a new rulebook every time you hire somewhere new. Where this fits in the wider picture is set out in our global payroll guide.

We hold a 4.8 out of 5 rating on G2, work with more than 300 companies, and have processed over $20M in payroll to date.

What our clients say

A short example of what that looks like in practice. A US software company had grown a team across several locations and was running payroll through a mix of spreadsheets and local vendors.

Onboarding took weeks, salary dates slipped, and nobody clearly owned the compliance record. We stepped in as the legal employer, consolidated everyone onto a single payroll cycle, and standardised contracts and statutory filings. Onboarding dropped from weeks to days, and salaries now clear the day after funds arrive.

"Wisemonk onboarded all of my employees in one or two days. They paid my employees' salaries on the day after my payment cleared." Frank Menes, Founder and CEO at Senem RFP

"They helped us understand their pricing model, find top-qualified individuals, interview them, and then onboard them. The individuals they were able to find have been some of the best engineers I have ever worked with." Dan Sampson, Head of Engineering at Cobu