Working Across a State Line: License, Registration and Income Tax

The job is twenty minutes away, but across the state line. The homeowner is ready and the work is ordinary. What changes is the paperwork: the license your home state issued does not cover work there, and the other state may want its own license, its own company registration, its own tax return and, in some states, a bond or a slice of every payment. Check them in this order. The license comes first, because without it nothing else matters.

Step 1: your license does not cross the line

A contractor license, where one is required, comes from a state board, a separate trade board, a county or a city, and covers work in that place only. Treat the new state as you would a first license: describe the job the way its board will, find the board, look for a separate trade board, then check the county and the city. Do I Need a Contractor License? walks through that method in fifteen minutes.

What can save you time is the exam you already passed. There are two shortcuts, and neither one is a license:

• Reciprocity on the trade exam. Some boards accept a trade exam passed elsewhere. Louisiana’s State Licensing Board for Contractors changed its exam reciprocity requirements in a letter of October 23, 2024: if you hold a classification that required a test in another state and passed that test “with no waivers, exemptions, or grandfathering in effect,” it accepts the exam for the equivalent Louisiana classification. “All other requirements for licensure must be met,” and the letter made its earlier state-by-state agreements null and void. Its reciprocity request form goes to the board that licensed you, which fills in your license and exam history and sends it back.
• The NASCLA accredited exams. The National Association of State Contractors Licensing Agencies offers an Accredited Examination for Commercial General Building Contractors. Its FAQ is blunt: “it is not a license or certification.” Passing it “can allow contractors and tradespeople to apply for licensure in more than one state without retaking the trade exam, subject to state requirements.” Its list of participating agencies covers 17 states and the U.S. Virgin Islands: Alabama, Arizona, Arkansas, California, Florida, Georgia, Louisiana, Mississippi, Nevada, New Mexico, North Carolina, Oregon, South Carolina, Tennessee, Utah, Virginia and West Virginia. A separate NASCLA electrical exam program has its own list, from the Alabama Board of Electrical Contractors to the West Virginia Contractors Licensing Board.

Either way you still apply to the other state’s board, on its forms, and meet everything else it asks for. NASCLA says it plainly: “Candidates must follow all state agency application policies and procedures in order to become licensed.” Ask the board which classification your exam counts toward before you rely on it. The commercial exam’s list includes residential boards, such as Alabama’s Home Builders Licensure Board and South Carolina’s Residential Builders Commission, and Louisiana says it places the exam in “the classification chosen by the LSLBC.”

Step 2: register the company where you work

The SBA’s rule of thumb: “If your LLC, corporation, partnership, or nonprofit corporation conducts business activities in more than one state, you might need to form your business in one state and then file for foreign qualification in other states where your business is active.” Its four signs that you are conducting business in a state:

• Your business has a physical presence in the state.
• You often have in-person meetings with clients in the state.
• A significant portion of your company’s revenue comes from the state.
• Any of your employees work in the state.

Send a crew over the line and the last one is true. Foreign qualification means filing a Certificate of Authority with that state and paying its filing fee, naming a registered agent there (someone who receives official papers for the company), and, in the SBA’s words, “taxes and annual report fees in both their state of formation and states where they’re foreign qualified.” A sole proprietor is different: “If you conduct business as yourself using your legal name, you won’t need to register anywhere,” though a trade name (a DBA) may need registering with a state, county or city, and the SBA says those requirements vary by place.

Two states that want more from an out-of-state contractor

Some states add their own step for contractors from elsewhere, and it is easy to miss because it lives with the revenue department, not the licensing board.

• Georgia: a tax bond. The Department of Revenue defines a nonresident contractor as one “who has not had a permanent place of business in Georgia for at least a year.” On a contract of $10,000 or more, it must submit through a surety “a nonresident performance tax bond which must be at least 10% of the contract price,” and pay a $10 fee for each contract over $10,000.
• South Carolina: your customer may hold back 2%. Section 12-8-550 of the state code requires anyone hiring a nonresident doing temporary business in the state to withhold 2% of each payment when the South Carolina part of the contract exceeds, or could reasonably be expected to exceed, $10,000. It does not apply if you are registered with the Secretary of State or the Department of Revenue and give the customer Form I-312, an affidavit saying so. The form goes to the person paying you, not to the department.

Say a remodeler from Georgia lands a $30,000 kitchen in South Carolina without registering. A homeowner who follows the law keeps back 2% of each payment, $600 over the job. Registered first, with the affidavit in the homeowner’s hands, the remodeler is paid in full: the statute says a customer who has that affidavit “is not responsible for the withholding.”

Step 3: income tax follows the work

Each state with an income tax writes its own list of what it taxes a nonresident on. Pennsylvania’s shows what to look for. It taxes nonresidents on “compensation for services performed in PA, unless the nonresident is a resident of Indiana, Maryland, New Jersey, Ohio, Virginia, or West Virginia,” and on “net income (loss) from the operation of a business, profession, or farm in PA.”

Those six states are Pennsylvania’s reciprocal agreements, and they are narrow. The Department of Revenue says they “apply to employee compensation only” and not “to any other class of income.” An owner’s profit from running jobs in Pennsylvania is a different class of income from a paycheck, so living in New Jersey does not take it out of Pennsylvania’s reach.

That can mean two returns: a nonresident return in the state where you worked, and your home state’s return, which may give a credit for tax paid to the other state. Pennsylvania, for one, says its residents “may qualify for credits against tax paid to other states on income earned outside of PA.” Tell your tax preparer about the out-of-state work in the year you do it, not in April. To find any state’s revenue department, the Federation of Tax Administrators keeps a directory of its member agencies with links to each.

Step 4: your crew’s paychecks

Employees who work in another state can bring that state’s withholding with them. Pennsylvania again: withholding is required “when nonresident employees perform services within Pennsylvania,” at a flat 3.07% of compensation, and an employer registers with the Department of Revenue to withhold and pay it. The reciprocal agreements cut the other way for wages: an employee who lives in one of the six states can file Form REV-419, if the employer agrees to withhold and pay the home state’s tax, so the employer can stop withholding Pennsylvania tax. A new REV-419 is due every year.

Other states write their own withholding rules. Read the rule on the revenue department’s site before the first payroll that includes days worked over the line, because fixing a year of wrong withholding is slower than setting it up once.

Step 5: sales tax is the other state’s answer

Whether labor is taxed, whether you pay tax on materials or charge it to the customer, and what certificate the customer can give you are decided by the state where the work happens, and the answers differ a great deal. Sales Tax on Your Invoice shows how one roof gets three answers in Texas, New York and Washington, and the questions to ask the other state’s revenue department.

Before you sign the out-of-state job

1. Confirm the license the other state requires for this job, and ask its board whether it accepts your exam and for which classification.
2. If you are an LLC or corporation, register the company there and name a registered agent; if you work under a trade name, check where it must be registered.
3. Check the other state’s revenue department for rules aimed at nonresident contractors: registration, bonds, and withholding by your customer.
4. Ask your tax preparer about the nonresident return there and the credit at home.
5. Set up that state’s payroll withholding before the crew’s first day there.
6. Put all of it in the price: the filing fees, any bond premium, the extra return and the drive.

The drive is a cost of its own. Leads Outside Your Service Area covers pricing the miles, and when to pass the job to someone closer.

General information, not legal or tax advice. Rules change and vary by state; check with the agency named above or a professional for your situation.