Locum Tenens Taxes in North Carolina

Nonresidents with North Carolina-source income file the standard Form D-400 and attach Schedule PN, which calculates the percentage of total gross income from all sources that is North Carolina-taxable and applies it against the standard or itemized deductions to arrive at North Carolina taxable income. Part-year residents use the same schedule for the portion of the year spent outside the state.

North Carolina does not carry a separate, generous de minimis exception for nonresidents the way some states do. If a locum physician earns North Carolina-source income above the state's minimum filing thresholds (which track the standard deduction amounts and adjust each year), a Schedule PN return is required. In practice, a single paid locum shift in North Carolina is rarely enough by itself to create a filing obligation, but a multi-week or multi-month assignment almost always is.

North Carolina sources personal-services income to where the services are physically performed. A rotation at an Atrium Health or Novant facility in Charlotte, a Duke- or UNC-affiliated hospital in the Triangle, or a critical-access hospital in the coastal plain or the mountains all create North Carolina-source income, whether the physician is W-2 through a staffing agency or 1099 through their own entity, and regardless of where the agency or entity is domiciled.

For a multi-state year, allocate by assignment when contract and calendar records allow it, or by working-day ratio when they don't. Schedule PN makes the North Carolina percentage explicit on the return itself, so a sloppy allocation is visible to the Department of Revenue in a way it might not be in a state that uses a flatter apportionment method. A clean day log and per-contract income records make the Schedule PN numbers defensible if questioned.

North Carolina has no reciprocal agreements with any state, including Virginia and South Carolina, its two most locum-relevant neighbors. Whatever your employment form, North Carolina-source income means a North Carolina nonresident return. The double-tax relief runs through the ordinary resident-credit system on the other end: if your home state has an income tax, it typically credits the North Carolina tax on income both states tax, up to its own rate on that income.

The Southeast wrinkle mirrors Georgia's: North Carolina's biggest feeder states for locum talent include Tennessee and Florida, both with no individual income tax. For those residents there is no home-state tax to credit against, so North Carolina's 3.99% is a straight, uncredited cost of working across the border. That is not a reason to skip North Carolina assignments, since day rates are often set with that in mind, but it belongs in an honest comparison of in-state versus out-of-state contracts.

W-2 agencies withhold North Carolina tax from wages for North Carolina work under standard payroll rules. Direct 1099 physicians and entities without withholding handle their own quarterly estimates on Form NC-40. So far, standard.

The distinctive piece is North Carolina's nonresident contractor withholding. A business paying a nonresident individual, or a nonresident entity such as an out-of-state S-corp, more than $1,500 in a calendar year for personal services performed in North Carolina must withhold 4% of each payment once the $1,500 threshold is crossed. If a hospital or staffing agency pays a locum physician directly as a 1099 contractor, or pays the physician's own out-of-state S-corp, that payer is generally the one required to withhold. The withheld amounts are remitted to North Carolina and claimed as a credit on the physician's or entity's North Carolina return, so it is timing rather than extra tax, but it changes cash flow mid-year and it is worth confirming with each new payer how they intend to handle it.

Unlike Georgia's rule, which targets a locum's own pass-through entity when it distributes North Carolina-source income to a nonresident owner, North Carolina's rule sits one step earlier in the chain and applies more broadly: it reaches payments to nonresident individuals directly, not only to entities. That makes it relevant to solo-proprietor locums and S-corp locums alike.

North Carolina law does not allow cities, counties, or any other local government to impose an income tax. Charlotte, Raleigh, Durham, Winston-Salem, Greensboro, and every county and rural municipality in the state fund their budgets through property tax and local sales tax add-ons instead. There is no city wage tax layered on top of the state return, no school-district tax, no county surcharge. Whatever a physician computes on Form D-400 is the whole state income-tax bill.

Set North Carolina against Pennsylvania (where a Philadelphia assignment layers a wage tax on top of the state's flat rate) or Ohio (where municipal net-profits taxes vary city by city), and North Carolina's simplicity is a genuine practical advantage: one form, one rate, no second jurisdiction to research before accepting an assignment in a city you have never worked before.

The standard locum S-corp math (self-employment tax savings weighed against payroll and compliance costs) works normally in North Carolina. Two state-specific items belong in the model:

The franchise tax. North Carolina imposes an annual corporate franchise tax on C-corps and S-corps doing business in the state, computed on the entity's net worth base, with a $200 minimum. It is filed alongside the S-corp income tax return (Form CD-401S). For a solo locum practice with limited retained earnings and a modest balance sheet, the franchise tax typically lands at or near that $200 minimum, but it is a real annual filing and payment that out-of-state S-corp owners frequently miss in their first North Carolina year.

The Taxed PTE election. North Carolina allows eligible S-corps and partnerships to elect to pay North Carolina tax at the entity level, at the same rate that applies to individuals (3.99% for 2026). The entity deducts the state tax federally as a business expense, and the owner excludes their share of the taxed income from their own North Carolina return, claiming a credit for the tax the entity already paid. With the federal SALT cap at $40,000 through 2026, the marginal federal benefit is thinner than it was under the old $10,000 cap, but for high earners with large combined state tax bills, the election can still produce real federal savings. Confirm whether making the election changes the entity's exposure to the 4% nonresident contractor withholding discussed above; the two rules were not designed as a single integrated system, and the interaction should be modeled with current-year numbers rather than assumed.

Illustrative example, not a specific client outcome. A Virginia-resident hospitalist works $80,000 of 1099 assignments across two North Carolina hospitals during the year, paid directly to her as an individual (no S-corp), and the rest of her year in Virginia. Virginia has a graduated income tax, so a resident credit is available.