Do reciprocity states require a signed form to avoid withholding?

Usually yes. The agreement lets a nonresident file only in the resident state, but the employer needs the exemption certificate that the work state prescribes. Without it, payroll withholds the work state tax and you claim a credit later, so keep a dated copy of the form.

Which state taxes my wages when I work remotely?

Generally the state where the work was performed, which is not always the state where payroll or the office sits. Some states apply a convenience rule that treats remote days as office days. Keep a monthly remote-week log and confirm the rule with the revenue department.

What happens to my taxes if I move states mid-year?

You become a part-year resident with two filing periods, and the same wages can be claimed by both states under a credit or deduction method. Fix the move dates, update withholding promptly, and use the state worksheets so the credit is applied correctly.

Is severance taxed in my old state or my new one?

It depends on how the payment is sourced and when you changed residency. Lump sums, salary continuation, and PTO cash-out can be treated differently. Ask payroll how the payment is reported and confirm the treatment with the state that expects the return.

State Tax Reciprocity & Remote Work

Reciprocity agreements let border states tax each other's workers with credit mechanisms: PA and NJ have a long-running agreement, and several states keep similar rules. Remote work adds a new layer: the work location, not the office, decides the tax line.

The Rules

Reciprocity: residents of one state working in another often file in the resident state only when a signed exemption form is in place (revenue state forms publish the lists).
Remote cross-border: many states tax by work location; the employer payroll state may differ from your residence (see the cross-state guide).
Part-year traps: mid-year moves create two returns; the credit method avoids double tax on the same wages (irs.gov and state worksheets).

The File

Keep: the exemption form, payroll state, remote weeks, and work-location proof. The remote jurisdiction rules are in the remote termination guide, and the W-4 lines in the W-4 guide. The relocation receipts are in the reimbursement guide.

Put the rule into action

Write the letter with the free Final Paycheck Demand Letter generator. The state pages carry the local payout and notice windows, and the application tracker keeps the follow-up date in writing.

Put the rule into action

Remote Termination Jurisdiction — what it means and what to do

How Reciprocity Shows Up On Your Paystub

Direct answer: a reciprocity agreement means you pay income tax to the state you live in, not the state you work in, but only when the exemption certificate that state requires is actually on file with your employer. Without the signed form, payroll withholds the work state's tax, and you end the year filing two returns and claiming a credit. Pennsylvania and New Jersey have the long-running agreement this site points to most often; other states keep narrower versions, and the current list is published by each state's revenue department.

Check the withholding lines on your first three paystubs. State tax should appear for your resident state only if the exemption is in place.
If the wrong state is withheld, send a short written request to payroll: name the form your state uses, attach it, and ask for confirmation of the effective date.
Keep a dated copy of the certificate. A withheld-tax dispute in April is argued from the form and its submission date, not from a remembered conversation.
Re-file after any move, role change, or change of work location. Certificates are employer-specific and location-specific.

Remote Work Moves The Work Location, Not The Office

The tax line follows where the work was performed, which is why remote work quietly changes a residency question that used to be simple. Payroll may sit in one state, your manager in another, and your home office in a third.

Log the weeks, not the commute. Keep a monthly count of days worked in each state. A remote-week log is the only evidence that survives an audit, and the employer's payroll state is not proof of where you worked. See the remote termination jurisdiction entry, which is the employment-law twin of this problem.
Ask about the convenience rule. Some states tax remote days as if they were worked at the office unless an exception applies. Confirm how your work state treats remote days in the year you worked, in writing, before you assume reciprocity covers them.
Nonresident filing is not optional. If a state expects a nonresident return for wages earned there, filing late is the problem even when the tax ends up zero. Check the threshold and the filing duty with that state's revenue department.
Expect the same mismatch at separation. Final pay, PTO cash-out, and severance can be sourced to a state you no longer work in. The state pages carry the local payout rules that decide which state's rules apply to the money.

The Part-Year Move Checklist

A mid-year move creates two resident periods and one set of wages. Work it in this order, and the credit math stays simple.

Fix the dates first. The move date, the last day worked in the old state, and the first day worked in the new state. Part-year returns are allocated by those dates, so an estimate becomes an amendment.
Change the withholding address the same week. Send the new relocation and start-date paperwork to payroll and confirm the effective pay period; double withholding is cash-flow damage, not a tax problem.
Decide domicile deliberately. Driver's license, voter registration, vehicle registration, mailing address, and where you keep a residence all get read later. Pick one and document it.
Check the credit method before filing. States use either a credit or a deduction for tax paid to the other state, and the worksheets differ. The IRS and both state forms publish the current worksheets; ask your preparer which one applies to your months.
Collect every Form W-2 and 1095-C before access ends, per the W-2 entry. Two employers plus a severance line in one year is the usual reason a state return gets amended. Track the dates on the tracker.

Situation	What Payroll Usually Does	What You Should Verify
Live in one state, work in another, certificate filed	Resident-state withholding only	The certificate is on file and current
Same situation, no certificate	Both states withheld	File two returns and claim the credit
Remote days from a different state	Follows payroll state, not your log	Whether a convenience-of-the-employer rule applies
Mid-year move	Two withholding profiles	Move date, part-year worksheets, credit method
Severance paid after a move	Sourced under old employer rules	Which state claims the payment and why

The live rule text sits on the New Jersey job exit rules page and the Pennsylvania job exit rules page, along with the equity tax trails guide hub. Confirm there before you put a date or a dollar amount in writing.

Frequently Asked Questions

Do reciprocity states require a signed form to avoid withholding?: Usually yes. The agreement lets a nonresident file only in the resident state, but the employer needs the exemption certificate that the work state prescribes. Without it, payroll withholds the work state tax and you claim a credit later, so keep a dated copy of the form.
Which state taxes my wages when I work remotely?: Generally the state where the work was performed, which is not always the state where payroll or the office sits. Some states apply a convenience rule that treats remote days as office days. Keep a monthly remote-week log and confirm the rule with the revenue department.
What happens to my taxes if I move states mid-year?: You become a part-year resident with two filing periods, and the same wages can be claimed by both states under a credit or deduction method. Fix the move dates, update withholding promptly, and use the state worksheets so the credit is applied correctly.
Is severance taxed in my old state or my new one?: It depends on how the payment is sourced and when you changed residency. Lump sums, salary continuation, and PTO cash-out can be treated differently. Ask payroll how the payment is reported and confirm the treatment with the state that expects the return.

Reciprocal wage credits, the base-state rule, and the filing order are state rules, graded in this build from reported sources. Confirm the base state, the credit combination, and the appeal deadline with the state agency named on the state rule pages, file in the base state before requesting a transfer in writing, and keep every earnings week in one file so the cross-state audit has a single record. File the statement with the unemployment claim statement generator in the base state, then request the transfer in writing.