Remote Work Across State Lines: Who Actually Taxes Your Paycheck
Working remotely from a different state than your employer creates a tax question that did not exist for most people before 2020, and the default assumption — "I pay tax where I live" — is right often enough to be dangerous. The exceptions are what cost money.
Scope: this page covers income tax and payroll tax only — federal income tax, FICA, state income tax and city wage tax. It does not cover property tax or sales tax.
The default rule, and why it is not enough
The general principle is that income is taxable both by the state where you are a resident and by the state where the work is physically performed. When those are the same state, nothing happens. When they differ, you can owe in both — and the mechanism that stops you paying twice is a credit, not an exemption.
Your resident state taxes your worldwide income. It then generally allows a credit for tax paid to another state on the same income. The credit is usually limited to what your resident state would have charged on that income — so if the work state's rate is higher, the credit does not cover all of it and you pay the difference.
The practical consequence: living in a low-tax state while working in a high-tax state does not get you the low-tax state's rate. You get the higher of the two.
The rule that catches remote workers: convenience of the employer
A small number of states apply what is commonly called the convenience of the employer rule. Under it, if you work remotely from outside the state for your own convenience rather than because your employer requires it, those days are still treated as work performed in the employer's state — and taxed there.
Two situations make this expensive:
- Your resident state has no income tax. Move from New York to Florida, keep the New York employer, work remotely for your own convenience — New York can tax those days, and Florida has no income tax to credit it against. There is nothing to offset. This is the specific trap in the New York to Florida move.
- Your resident state has a lower rate. The credit is capped at your resident state's own liability, so the excess is unrecoverable.
The escape is narrow. "My employer closed the office" or "the role is designated remote" is a different fact pattern from "I preferred to move." The distinction is documentary — an employer statement, a job requisition marked remote, a bona fide office location. Assume it will be examined.
Reciprocity agreements
Some neighboring state pairs have reciprocity agreements: you file only in your resident state, and your employer withholds for the resident state rather than the work state. This is the clean case, and it exists largely for commuters across metro-area borders.
Two things to know. First, reciprocity is bilateral and specific — it exists between named state pairs, not as a general principle. Second, it is not automatic: you normally file a non-residency certificate with your employer to turn it on, and if you never file it your employer withholds for the work state and you have to claim the refund yourself.
Withholding is not the same as liability
This is the most common source of an unpleasant April. Your employer withholds based on what is in the payroll system — usually a single work location and a single resident address. It does not know that you spent eleven weeks working from a third state.
Withholding is an estimate and a mechanism for collection. Liability is what the law says you owe. If they diverge, you are responsible for the difference plus, potentially, underpayment penalties. Correct withholding in one state does not prove correct liability across all of them.
The day-count trap
Several states can tax a non-resident who exceeds a threshold number of working days in the state, and a few tax from the first day. There is no national standard, thresholds vary widely, and in some states a partial day counts as a full day.
People who trigger this without noticing: sales roles with multi-state territories, consultants on client sites, anyone who works a laptop week from a relative's house in another state, and people who split the year between two homes.
Separately, a resident-side test exists: maintaining a permanent place of abode in a state and spending more than a threshold number of days there can make you a statutory resident of that state — taxed on all your income, not just the days worked there. Two states can each consider you a resident under their own rules in the same year.
What to actually do
- Keep a day log. A calendar showing where you physically were each working day. If a state asks, the burden is on you. Reconstructing a year afterwards from flight confirmations and photo metadata is worse than keeping it as you go.
- Tell payroll before you move, not after. Withholding set up correctly from day one avoids a refund claim in one state and an underpayment in another.
- Check for reciprocity if your states border each other, and file the certificate.
- Get the convenience-rule question answered in writing if your employer is in a state that applies it. This is the single highest-value question to resolve before relocating.
- Budget for the higher of the two rates, not the lower, until you have confirmed otherwise.
- Model the federal layer first. Federal income tax and FICA do not change with any of this — run your salary through the take-home salary calculator so you know how much of the paycheck is even in play. The state question only touches the remainder.
When to pay for advice
A CPA is worth it if any of these apply: your employer is in a convenience-rule state, you moved mid-year, you have equity compensation that vested across a move, you work in more than two states in a year, or you maintain homes in two states. Each of those has a way of producing a five-figure surprise, and each is well-trodden ground for a professional.
If none apply and you simply live and work in one state, none of this is your problem — see $100,000 after taxes by state for the straightforward version, or the nine states with no income tax.
Frequently asked questions
If I work remotely, do I pay tax where I live or where my employer is?
Usually where you live, but not always. Income can be taxable both by your resident state and by the state where the work is performed, with a credit preventing double taxation. Under a convenience of the employer rule, a handful of states — New York most notably — can tax days you worked remotely from elsewhere if the remote arrangement was for your convenience rather than the employer's necessity.
What is the convenience of the employer rule?
It treats days worked remotely from outside the state as if they were worked inside it, when the remote arrangement suits the employee rather than being required by the employer. It matters most when your resident state has no income tax, because there is no state tax to credit the other state's bill against.
Does my employer's withholding mean my taxes are correct?
No. Withholding is an estimate based on the address and work location in the payroll system. It does not know where you physically worked during the year. If withholding and liability diverge, you owe the difference and possibly an underpayment penalty.
Do I need to track which days I worked in each state?
Yes, if you work in more than one. Several states tax non-residents after a threshold number of working days and a few from the first day, and in some a partial day counts as a full day. If a state asks, the burden of proof is on you.
What is a reciprocity agreement?
A bilateral arrangement between two specific states under which you file only in your resident state and your employer withholds for that state. It is not automatic — you normally have to file a non-residency certificate with your employer, and if you do not, withholding defaults to the work state.
Not tax advice. This page explains how the pieces fit together and gives you a working estimate. It is not a substitute for a CPA or an enrolled agent, and it does not know your credits, pre-tax deductions or personal circumstances. Every rate, bracket and standard deduction used here comes from the tables in us-state-tax.json, each carrying a link to the state revenue department or IRS publication it was taken from. This page cites no unverified figure.