State Tax Reciprocity Agreements: The Complete 2025 Guide

State tax reciprocity agreements are one of the most misunderstood corners of the American payroll system, yet they affect millions of cross-border commuters every payday. A reciprocity agreement is a bilateral arrangement between two states that allows a resident of one state who commutes to work in the other to pay income tax only to their state of residence. For the worker, this means one state tax return instead of two and a noticeably larger paycheck. For payroll administrators, it means knowing which exemption form to honor and when.

This complete 2025 guide explains what reciprocity is, what it is not, which states participate, and how to claim the exemption correctly. We also cover the practical wrinkles that trip up workers and payroll departments — remote work, local taxes that survive reciprocity, and the year-end reconciliation that follows a missed exemption form. Every dollar figure, form number, and partner-state pairing cited below comes from primary sources including state Departments of Revenue and the official text of the reciprocity agreements.

What reciprocity actually is

A reciprocity agreement is a compact between two states, authorized under the United States Constitution's Compact Clause and codified in each state's tax code, that alters the default sourcing rule for wages. Without reciprocity, wages are generally sourced to the state where the work is physically performed — meaning a Maryland resident working in Pennsylvania would owe Pennsylvania income tax on those wages and would then claim a credit on their Maryland return. With reciprocity, the work state (Pennsylvania) agrees not to tax the wages of a Maryland resident, leaving Maryland as the sole taxing jurisdiction.

The policy rationale is fairness and administrative simplicity. Cross-border commuters consume public services in their state of residence — schools, roads, public safety — and should pay income tax there. Reciprocity also spares workers from filing two state returns and from cash-flow problems caused by owing more to the residence state than the work-state credit covers. The agreements are bilateral, meaning both states extend the same treatment to each other's residents.

Reciprocity is a public-policy choice, not a constitutional requirement. States are free to tax non-resident wages, and most do. The states that have entered reciprocity agreements have done so because their labor markets straddle state lines — think the Washington-Baltimore metro, the Cincinnati tri-state area, or the Philadelphia-New Jersey corridor — and the political consensus favors a single taxing authority.

What reciprocity is NOT

Reciprocity is not the same as a tax credit for taxes paid to another state. Every state with an income tax offers some form of credit to residents who pay income tax to other states on wages earned there, but that credit is applied after the fact on the residence-state return. Reciprocity, by contrast, prevents the work state from taxing the wages at all. The difference matters: a credit still requires you to file two state returns, may not fully offset the residence-state liability if the work-state rate is lower, and ties up your money until refund season.

Reciprocity is also not automatic. Employees must affirmatively claim the exemption by filing a state-specific form with their employer. Until the form is filed, the employer is legally required to withhold work-state income tax under default sourcing rules. Many new hires discover this the hard way when their first few paychecks show withholding for the wrong state.

Finally, reciprocity applies only to wage income. Self-employment income, partnership distributive shares, rental income, royalties, and capital gains all remain sourced under the default rules. A consultant who lives in Maryland and provides services to Pennsylvania clients through an LLC cannot use the MD-PA reciprocity agreement to avoid Pennsylvania tax on that business income. The agreement is strictly for W-2 wages earned as an employee.

The 16 states plus DC that participate

Sixteen states and the District of Columbia currently maintain reciprocity agreements with at least one neighboring state. They are: the District of Columbia, Illinois, Indiana, Iowa, Kentucky, Maryland, Michigan, Minnesota, Montana, New Jersey, North Dakota, Ohio, Pennsylvania, Virginia, West Virginia, and Wisconsin. Each agreement is codified in the tax code of both participating states, and the list of partners has been remarkably stable over the past decade — the most recent major change was Virginia's 2023 notification that it intended to terminate its reciprocity with California, a state with which no active reciprocity exists in practice anyway.

Most reciprocity states cluster in two regions: the Midwest (Illinois, Indiana, Iowa, Kentucky, Michigan, Minnesota, Montana, North Dakota, Ohio, Wisconsin) and the Mid-Atlantic (Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, plus DC). The two clusters overlap in Pennsylvania and West Virginia, which bridge the regions. There is no reciprocity in the South outside the Mid-Atlantic, no reciprocity in New England, and no reciprocity on the West Coast — California, Oregon, and Washington all tax non-resident wages under default sourcing rules.

The complete reciprocity matrix

The table below maps each participating state to its partner states and the exemption form the employee must file. Always confirm the current form revision with the relevant Department of Revenue before submitting.

Note that some agreements are asymmetric in subtle ways. Ohio's reciprocity with West Virginia, for example, exempts wages but West Virginia's form WV/IT-104 R has its own certification language. Pennsylvania's Rev-419 is technically a withholding certificate that the resident files to claim exemption from another state's withholding; many of Pennsylvania's partners require their own local form in addition. When in doubt, file both states' forms and keep copies.

How reciprocity works in practice

The mechanics are straightforward when followed in order. On your first day working for an employer located in a reciprocity state, you complete two state withholding forms: one for your residence state (declaring residency) and one for the work state (claiming exemption under reciprocity). The work-state exemption form typically asks for your name, Social Security number, residence address, and a declaration under penalty of perjury that you are a resident of the partner state. Your employer's payroll system then withholds only residence-state income tax.

Each pay period, your pay stub should show income tax withheld only for your residence state. If you see withholding for the work state after submitting the exemption form, contact your payroll department immediately — there is usually an administrative error in setting up your record. The exemption stays in effect until you move, change jobs, or revoke it in writing. Employers are generally required to keep the exemption form on file for as long as you are employed, plus a few years for audit purposes.

One important nuance: the exemption covers only state income tax. Federal income tax, Social Security, and Medicare withholding are unaffected. State-level paid family leave premiums, unemployment insurance (paid by the employer), and any local taxes follow their own rules and may still apply.

What happens if you do not file the form

If you never file the exemption form, your employer defaults to withholding work-state income tax according to that state's default withholding tables. You are not losing money in the long run — you will eventually claim a refund on a non-resident work-state return — but you are tying up cash flow for months and creating extra paperwork. Worse, if your residence state's rate is higher than the work state's rate, the work-state withholding may not cover your full residence-state liability, leaving you with a balance due plus possible underpayment penalties.

To recover incorrectly withheld work-state tax, file a non-resident return for that state at year-end reporting zero (or near-zero) income sourced to it, since the reciprocity agreement re-sources the wages to your residence state. Most state Departments of Revenue process these refunds within eight to twelve weeks. You must also file your residence-state return reporting the full wages and claiming any credit available for taxes paid to other states — though in a true reciprocity situation there should be no other-state tax to credit.

Reciprocity and remote work

The shift to remote work has created new questions about reciprocity. The general rule is that wages are sourced to the state where the work is physically performed, regardless of where the employer is located. A Maryland resident who works from home in Maryland for a Virginia employer, under the MD-VA reciprocity agreement, owes tax only to Maryland — and reciprocity prevents Virginia from withholding. Without reciprocity, the same worker would owe tax to Virginia on those telework wages and would need a credit on their Maryland return.

Things get murkier when the worker splits time between states. An employee who works three days a week from home in Maryland and two days in the Virginia office has a hybrid arrangement that may require apportionment. Some reciprocity agreements cover this scenario cleanly; others require the employer to track days worked in each state. The safest approach is to document your work-location days and to confirm the employer's withholding matches your actual work pattern.

The pandemic-era temporary rules — many states suspended their physical-presence sourcing requirements in 2020 and 2021 — have largely lapsed. As of 2025, most states have returned to the pre-pandemic sourcing framework. Workers who began teleworking during the pandemic and never updated their withholding should review their situation with a tax professional.

Special cases: local taxes that survive reciprocity

Reciprocity covers only the state-level income tax. Local taxes are governed by separate statutes and may still apply to non-residents. Three notable examples illustrate the pattern.

Ohio's School District Income Tax (SDIT) is levied by roughly 200 school districts on residents of those districts, and it is collected alongside the state income tax. The SDIT is a resident-only tax — non-resident workers in Ohio do not owe SDIT — but Ohio residents who commute out of state to a reciprocity partner still owe SDIT to their home district. Employers in reciprocity situations often forget to set up SDIT withholding for Ohio residents.

Maryland's county tax runs 2.25% to 3.20% depending on the county of residence, layered on top of the state's flat 4.75% (graduated) income tax. Non-residents who work in Maryland do not owe the county tax, but Maryland residents owe it regardless of where they work. When a Maryland resident commutes to a reciprocity state and files the exemption form, the employer must still withhold Maryland state and county tax on the wages — reciprocity does not extend to the work state's local equivalents.

Pennsylvania's local Earned Income Tax (EIT), administered by local tax collectors under Act 32, applies to Pennsylvania residents regardless of where they work, and to non-residents who work in a Pennsylvania jurisdiction that levies the tax. A New Jersey resident commuting to a Philadelphia employer under the PA-NJ reciprocity agreement still owes Philadelphia's wage tax (3.44% for non-residents in 2025), which is technically a separate levy from the state income tax and is unaffected by reciprocity.

How to claim reciprocity, step by step

Claiming reciprocity is a four-step process. First, confirm that your residence state and work state have an active reciprocity agreement — check the matrix above or the work-state Department of Revenue website. Second, obtain the correct exemption form for the work state from the employer's HR department or the work-state DOR website. Third, complete the form accurately, including your residence address, Social Security number, and the declaration of residency. Fourth, submit the form to your employer's payroll department and retain a copy for your records.

After submitting, check your next two pay stubs carefully. The first full pay period after submission should reflect the change. If it does not, follow up with payroll in writing. If the issue persists, escalate to HR and cite the specific reciprocity statute or DOR guidance. In rare cases, you may need to file the form a second time and document the submission.

For workers who change jobs within the same work state, you must file the exemption form with each new employer. Reciprocity does not carry over automatically when you switch employers. Likewise, if you move to a new residence state, file a new exemption form (or revoke the old one) within the timeframe set by the work state — usually 10 days of the move.

Common reciprocity mistakes

The single most common mistake is failing to file the exemption form at all. Workers assume the employer will figure it out, but the employer is legally required to withhold work-state tax by default. A second common mistake is filing the wrong form — for example, an Indiana resident working in Kentucky should file Kentucky's Form 42A809, not Indiana's WH-47, which is for the reverse situation.

Third is forgetting to refile after a move. If you move from Maryland to Virginia, your existing MW507 filed with a DC employer is no longer valid, and you must file a new exemption form reflecting Virginia residency. Fourth is assuming reciprocity covers local taxes — it does not, as the Ohio, Maryland, and Pennsylvania examples above show. Fifth is failing to file a non-resident return for the work state when an employer incorrectly withheld tax. The money does not come back automatically; you must claim the refund on the appropriate form.

What to do next

Pull your most recent pay stub and identify which states have income tax withheld. If you see withholding for a state where you do not reside, confirm whether reciprocity applies, then file the appropriate exemption form with your employer. For workers already correctly under reciprocity, run our multi-state withholding calculator to verify that the residence-state withholding matches your projected liability — particularly if you have multiple jobs, side income, or recently moved. If you missed an exemption form earlier in the year, plan now to file a non-resident work-state return for a refund next spring.