Reciprocity
Do North Carolina and South Carolina Have a Tax Reciprocity Agreement?
No. North Carolina and South Carolina do not have a tax reciprocity agreement. North Carolina law (N.C.G.S. 105-153.8) authorizes the state to enter reciprocal agreements with border states when certain conditions are met, but no such agreement has been finalized with South Carolina.
Without reciprocity, both states claim a right to tax the same wages. North Carolina taxes nonresidents on income earned within the state. South Carolina taxes its residents on all income from every source. The mechanism that prevents double payment is a tax credit on your South Carolina return, not an exemption from filing in North Carolina.
For South Carolina residents who commute to jobs in the Charlotte metro area, the Research Triangle, or other NC cities along the border, the absence of reciprocity means filing two state returns every year. Your North Carolina employer is required to withhold North Carolina tax from your pay, and you cannot request that the employer redirect withholding to South Carolina instead.
Filing Obligations
Which Tax Returns Do I File as an SC Resident Working in North Carolina?
| Return | State | Form |
|---|---|---|
| Nonresident return | North Carolina | D-400 + Schedule PN |
| Resident return | South Carolina | SC1040 |
| Credit for NC taxes paid | Claimed on SC1040 | SC1040TC |
File the North Carolina nonresident return first. You need the final NC tax figure to calculate your credit on the South Carolina return. On Form D-400 with Schedule PN, report all income in the federal column and use Schedule PN to calculate the percentage that is North Carolina-source income.
Schedule PN determines the share of your total income subject to North Carolina tax. The state taxes you on that percentage of your total NC-calculated tax liability. Review Form D-400 Schedule PN-1 if you have North Carolina adjustments not listed on Schedule PN.
On your South Carolina SC1040, report all income from every source. Claim the credit for North Carolina taxes paid on Form SC1040TC and attach a copy of your completed NC return as supporting documentation.
Both returns are due April 15. South Carolina grants additional time for electronic filers: no late-filing penalties or interest apply if you file and pay electronically by May 1.
Resident Credit
How Does South Carolina's Credit Prevent Double Taxation?
South Carolina taxes residents on all income. North Carolina taxes nonresidents on income earned within the state. Without a credit, you would owe both states' full rates on the same wages. South Carolina's SC1040TC credit eliminates this overlap.
The credit equals the lesser of:
- The income tax you actually paid to North Carolina on your NC-source wages, or
- The South Carolina tax attributable to that same income
For tax year 2026, North Carolina charges a flat 3.99%. South Carolina's rates are 1.99% on the first $30,000 of taxable income and 5.21% on amounts above $30,000, with a $966 bracket adjustment. On most income levels, the SC tax on the double-taxed wages is lower than the NC tax, so the credit covers the full SC liability and your total state tax equals the North Carolina amount.
The credit cannot exceed the actual tax paid to North Carolina. Keep your NC return, W-2 forms, and proof of NC tax payment in case South Carolina requests verification.
If you have South Carolina-source income not taxed by North Carolina, such as rental income from SC property, that income is taxed only by South Carolina and does not factor into the credit calculation.
Employer Withholding
How Should My North Carolina Employer Handle Withholding?
Your North Carolina employer withholds North Carolina income tax from your pay. This is required for all employees performing services in the state, regardless of where they live. NC uses a flat withholding rate that reflects the 3.99% individual income tax rate for 2026.
Your employer does not withhold South Carolina income tax. Because only NC tax is withheld, your SC1040 may show either a balance due or a small refund depending on how the credit calculation works out at filing time.
If NC tax exceeds your SC liability on the same income, the SC1040TC credit typically zeroes out your SC tax, and you owe nothing additional to South Carolina on those wages. If your SC tax rate on the income is higher than the NC rate, you may owe the difference to South Carolina at filing time. In that case, consider making quarterly estimated payments to South Carolina using Form SC1040ES to avoid underpayment penalties.
SC 2026 Tax Changes
How Do South Carolina's 2026 Tax Changes Affect My Return?
South Carolina overhauled its income tax structure for tax year 2026 under H. 4216, signed into law on March 30, 2026. The state replaced its former multi-bracket system with two brackets: 1.99% on taxable income under $30,000 and 5.21% on income of $30,000 and above, with a $966 bracket adjustment that creates a smooth transition between the two rates.
The law also introduced the South Carolina Income Adjusted Deduction (SCIAD), replacing the federal standard deduction. SCIAD amounts by filing status are: $15,000 for single or married filing separately, $22,500 for head of household, and $30,000 for married filing jointly or surviving spouse.
South Carolina no longer follows the federal standard and itemized deduction rules. Federal adjusted gross income serves as the starting point for your SC return, and the SCIAD is applied as a South Carolina-specific deduction. These changes affect how your SC1040TC credit calculation interacts with your total SC tax liability on cross-border wages.
Worked Example: SC Resident Earning $70,000 in North Carolina
| Line item | Amount |
|---|---|
| Gross wages (all NC-source) | $70,000 |
| NC nonresident tax (3.99%) | $2,793 |
| SC resident tax before credit (5.21% minus $966) | $2,681 |
| SC1040TC credit (lesser of NC tax or SC tax) | $2,681 |
| SC tax after credit | $0 |
| Total state income tax | $2,793 |
Single filer, all wages from NC employer, 2026 rates applied to gross wages before deductions
Remote Work
What If I Work from Home in South Carolina for an NC Employer?
North Carolina does not apply a convenience of the employer rule. NC taxes nonresidents only on income for services physically performed in the state. Days you work from your South Carolina home are SC-source income, not NC-source income.
If you split your workweek between both states, allocate your wages based on the number of days worked in each location. Report only the NC portion on Form D-400 Schedule PN. The SC portion is taxed only by South Carolina, with no NC filing obligation on those dollars.
Shifting workdays from North Carolina to South Carolina can reduce your total tax if the NC rate exceeds your effective SC rate on those wages. Track your work location daily and keep a log or calendar as documentation, because both states may request proof of how you allocated income during a review.
South Carolina likewise taxes based on where services are physically performed. Neither state uses a telecommuter tax or claims the right to tax income based solely on the employer's location.
Mid-Year Move
What If I Moved Between NC and SC During the Year?
If you changed your permanent residence between the two states during the year, file as a part-year resident in each state. In North Carolina, file Form D-400 with Schedule PN to report income during your nonresident and part-year resident periods. In South Carolina, file SC1040 and indicate your part-year resident status.
During the months you lived in South Carolina and worked in North Carolina, the credit mechanism described above applies. During any months you lived in North Carolina, the state taxes you as a resident on all income from every source, and South Carolina taxes only your SC-source income for that period.
Document your exact move date. Lease or mortgage records, utility activation dates, and driver's license changes serve as evidence. Both states require you to identify the date your residency changed, and each state's claim to your income depends on which days you were a resident.
Withholding Errors
What If My Employer Withheld for the Wrong State?
If your North Carolina employer mistakenly withheld South Carolina tax instead of North Carolina tax, you will owe North Carolina the full amount when you file. Submit Form D-400 with Schedule PN and pay the balance due. Claim the incorrectly withheld SC amount on your SC1040, and South Carolina will apply it as a payment toward your liability or issue a refund.
A more common problem is an employer withholding no state tax at all. If nothing was withheld, you owe NC the full amount when you file and may face underpayment penalties. Set up estimated payments for future quarters to avoid repeating the shortfall.
To prevent ongoing issues, confirm that your employer's payroll records show your South Carolina home address correctly and that North Carolina withholding appears on the state tax line of your pay stubs. Verify the withholding on your first pay stub of each year to catch errors early.
Questions
Work in North Carolina, Live in South Carolina: How Taxes Work FAQ
Do North Carolina and South Carolina have a tax reciprocity agreement?
No. North Carolina and South Carolina do not have a reciprocity agreement. South Carolina residents who work in North Carolina must file returns in both states each year. Your NC employer withholds NC income tax, and you claim a credit on your SC1040 using Form SC1040TC for the tax paid to North Carolina to avoid double taxation on the same wages.
Which state return do I file first?
File the North Carolina nonresident return (D-400 with Schedule PN) first. You need the final NC tax figure to calculate the credit on your South Carolina SC1040. Complete the SC resident return second and attach Form SC1040TC along with a copy of the NC return as supporting documentation.
Will I pay more total tax because of dual filing?
No. The SC1040TC credit prevents double taxation. Your total state income tax equals the higher of the two states' tax on your wages, not both combined. If NC's rate produces a higher tax than SC's rate on the same income, your total equals the NC amount. The SC credit covers the overlap so you pay income tax on those wages only once.
How do South Carolina's 2026 tax changes affect cross-border filers?
H. 4216 replaced SC's former multi-bracket system with two brackets: 1.99% on income under $30,000 and 5.21% on income above $30,000, minus a $966 bracket adjustment. The law also created the South Carolina Income Adjusted Deduction (SCIAD), which replaces the federal standard deduction. These changes affect both your SC tax calculation and the credit for taxes paid to NC.
Does working from home in SC reduce my NC tax?
Yes. North Carolina taxes nonresidents only on income from services physically performed in the state. Neither state applies a convenience of the employer rule. Days you work from home in South Carolina are SC-source income. Allocate wages based on workdays in each state and report only the NC days on Schedule PN. Keep a daily location log for documentation.
What forms do I need for both states?
For North Carolina, file Form D-400 with Schedule PN to calculate the percentage of income taxable by NC. For South Carolina, file Form SC1040 with Form SC1040TC to claim the credit for NC taxes paid. Attach your completed NC return to your SC filing. If you have NC adjustments, also review Schedule PN-1.
Are there any local income taxes in North Carolina or South Carolina?
No. Neither North Carolina nor South Carolina imposes a local, city, or county income tax on individuals. Your only income tax obligations are at the state level in both states. This simplifies cross-border filing because you do not need to address any local tax withholding or credits beyond the two state returns.
- Sources: NCDOR: Individual Income Tax Rate Schedules · SCDOR: Information about H. 4216 · SCDOR: Individual Income Tax · NCDOR: Credit for Income Tax Paid to Another State or Country
- Last updated September 10, 2026
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