Your payroll provider runs the checks. It doesn't decide which states you owe. The moment an employee works from a new state, your agency picks up a list of registrations, deposits, and filings in that state, and nobody sends you a reminder. This is the checklist: every obligation a remote hire can trigger, how each one works, and what it costs when you miss it.
This post is the obligations list. If you want the step-by-step setup procedure, read how to set up multi-state payroll. If you just hired your first out-of-state employee and want the plain-English version of what changes, start with how multi-state payroll works. For the broader picture of running a distributed agency team, see our guide to multi-state payroll for remote marketing agencies.
The ground rule behind everything below: your obligations follow where each employee physically works, not where your agency is incorporated or where your office sits.
Registration comes first. You can't deposit tax into an account that doesn't exist. Before the first payroll for an employee in a new state, check each of these:
Some states process registrations in days. Others take weeks. Start the paperwork when the offer letter goes out, not when the first payroll is due.
💡 Key Insight: A no-income-tax state is not a no-payroll-tax state. A designer in Texas still needs a Texas unemployment account, workers' comp coverage, and a new hire report. "No state tax" only removes one line from the list.
Withholding follows the work. If your agency is in Illinois and your strategist works from home in Georgia, you withhold Georgia tax, not Illinois. Each state sets its own withholding tables, its own employee certificate (many states don't accept the federal W-4), and its own deposit schedule based on how much you withhold.
A few states give a short grace period, measured in days, before withholding kicks in for a traveling nonresident. Most don't. For a full-time remote employee, assume withholding starts with the first paycheck.
Reciprocity is the exception that helps you. Sixteen states plus D.C. have agreements with one or more neighbors: an employee who lives in one state and works in the other pays income tax only to their home state. Pennsylvania and New Jersey have one. So do Maryland, Virginia, and D.C., and several Midwest pairs like Illinois and Wisconsin.
Two catches. First, the employee has to file the work state's nonresident exemption certificate with you. No form, no exemption. Second, reciprocity only covers income tax. It does nothing for unemployment insurance, paid leave, or local taxes.
Where there's no agreement and an employee lives in one state but works in another, you generally withhold for the work state. The employee's home state usually gives them a credit for tax paid to the other state, though some employers also withhold the difference for the home state as a courtesy.
This is the exception that hurts. New York, Pennsylvania, Delaware, and Nebraska can tax a nonresident's wages as if earned at the employer's in-state office when the employee works remotely for their own convenience rather than because the employer requires it. Connecticut and New Jersey apply a retaliatory version that targets residents of states that have their own convenience rule (see the New Jersey Division of Taxation FAQ).
What it means for you: if your agency is based in New York and an employee works from North Carolina by choice, New York may still claim that income. The employee can end up filing in both states, and the credit doesn't always make them whole. Document whether each remote arrangement is the agency's requirement or the employee's preference, and get advice before assuming the home state is the only one that counts.
Unemployment insurance works differently from income tax. Withholding can be split across states. Unemployment wages are generally reported to just one state per employee.
Which state gets the report follows a four-part test the states share: where the work is localized, then the employee's base of operations, then where the work is directed and controlled from, then where the employee lives. For a full-time remote employee who works from home, that's almost always the home state.
Each state assigns your agency its own rate and its own taxable wage base. New employers get a standard new-employer rate until they build a claims history in that state. Rate notices usually arrive late in the year. Load the new rate before the first January payroll.
FUTA is 6.0% on the first $7,000 of each employee's wages, reduced to 0.6% by a credit for state unemployment tax paid. That credit shrinks in states that haven't repaid federal unemployment loans. For 2025, California employers lost 1.2% of the credit and the U.S. Virgin Islands 4.5%. California was on the potential list again for 2026, and the final list is set each November. Check the Department of Labor's FUTA credit reduction page for the current states and rates before you file Form 940.
Local taxes are the obligation agencies miss most. State setup gets attention. City and county taxes hide one level down.
The address you need is the employee's home address and their work address, down to the municipality. A ZIP code alone isn't enough in Ohio or Pennsylvania.
About 13 states plus D.C. have mandatory paid family and medical leave laws, and the list keeps growing. Programs in California, Colorado, Connecticut, Delaware, Maine, Massachusetts, Minnesota, New Jersey, New York, Oregon, Rhode Island, Washington, and D.C. are collecting contributions or paying benefits. Maryland has enacted one. Payroll contributions start January 1, 2027, and benefits are scheduled to begin by January 2028. Separately, California, Hawaii, New Jersey, New York, and Rhode Island run disability insurance programs. Each one sets its own contribution rate, wage cap, and employer-versus-employee split.
California and Illinois require employers to reimburse employees for necessary business expenses, which can include part of a remote worker's phone and internet. Several other states have similar rules. If you have remote staff in those states, you need a written reimbursement policy.
Employment law follows the employee too. That means the work state's minimum wage (and any higher city rate), overtime rules, pay frequency, and pay stub requirements.
California is the strictest for most agencies. Nonexempt employees earn overtime after eight hours in a day, not just after 40 in a week, and meal and rest break rules apply. Many agency roles are exempt, but exempt status depends on salary and duties under state law, not just the job title.
Final paychecks are a common trap. California requires final pay immediately when you terminate someone, and penalty wages build for each day it's late. Other states allow until the next regular payday. Keep a termination checklist per state.
Pay transparency laws in a growing number of states, including California, Colorado, Illinois, New York, and Washington, can reach remote job postings open to applicants in those states. Including a salary range on remote postings is the simplest way to stay compliant.
Penalties stack up fast. When a state finds an unregistered employer, the bill usually reaches back to the employee's first day of work: the tax that should have been withheld or paid, interest, late-filing and late-payment penalties, and sometimes an estimated assessment if you have no records to show them.
States rarely find you by accident. The usual triggers are an employee's unemployment claim, a W-2 that lists a state where you have no account, or a resident return claiming a credit for tax you never withheld. Unpaid withholding is also a trust fund tax in most states, meaning the people responsible for payroll can be held personally liable.
💡 Key Insight: Fixing a missed state costs more than registering on time, every time. A registration takes an afternoon. Cleaning up two years of unfiled returns takes months, and it surfaces at the worst moments: due diligence for a sale, a bank loan, or an audit.
Once a year, ideally in the fourth quarter before January rate and law changes, run this check:
We see the same pattern a lot when we take over an agency's books: the payroll system is configured fine for the states it knows about. The problem is the state it doesn't know about.
Iota Finance works with marketing, creative, staffing, and dev agencies as their outsourced finance team. For multi-state payroll, that means mapping where your people actually work, identifying every registration you need, and reconciling payroll tax liabilities to your books every month so a missed state shows up in weeks, not years.
It ties into the rest of your finances: accounting and monthly close, tax planning and compliance, and fractional CFO support when you're deciding where to hire next. Learn more about how we work with agencies.
Not sure which states you owe? Book a call with Iota Finance and we'll map your agency's payroll footprint.
Usually, yes. A single employee working from a state generally requires a withholding account (if the state taxes wages), an unemployment insurance account, and new hire reporting there. There's no minimum headcount.
Generally one state, chosen by a shared four-part test: where the work is localized, then the base of operations, then where it's directed from, then the employee's residence. For someone who works full time from home, that's almost always their home state.
No. Reciprocity only covers state income tax withholding, and only after the employee files the work state's exemption certificate with you. Unemployment, paid leave, and local taxes follow their own rules.
Expect to owe the tax that should have been paid back to the employee's start date, plus interest and penalties. Some states offer voluntary disclosure programs that can reduce penalties if you come forward before they contact you.
Independent contractors aren't on payroll, so no withholding or unemployment insurance applies. But if a contractor should really be an employee, every obligation in this checklist applies retroactively. See contractors vs. employees for how classification works.
This article is for general educational purposes and isn't tax or legal advice. Tax rules change and depend on your specific facts, so talk with a qualified professional before acting on it.